]> granicus.if.org Git - postgresql/blobdiff - contrib/pgbench/pgbench.c
Add -M (query mode) option per ITAGAKI Takahiro
[postgresql] / contrib / pgbench / pgbench.c
index ab5f0907167f727e87a6637dfe0120c12c56bad1..41312e88c64bb10ccc652992f797bac4d2395d05 100644 (file)
@@ -1,38 +1,45 @@
 /*
- * $Header: /cvsroot/pgsql/contrib/pgbench/pgbench.c,v 1.2 2000/04/08 18:32:24 tgl Exp $
+ * pgbench.c
  *
- * pgbench: a simple TPC-B like benchmark program for PostgreSQL
- * written by Tatsuo Ishii
+ * A simple benchmark program for PostgreSQL
+ * Originally written by Tatsuo Ishii and enhanced by many contributors.
  *
- * Copyright (c) 2000  Tatsuo Ishii
+ * $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.79 2008/03/19 03:33:21 ishii Exp $
+ * Copyright (c) 2000-2008, PostgreSQL Global Development Group
+ * ALL RIGHTS RESERVED;
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without a written agreement
+ * is hereby granted, provided that the above copyright notice and this
+ * paragraph and the following two paragraphs appear in all copies.
+ *
+ * IN NO EVENT SHALL THE AUTHOR OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
+ * LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
+ * DOCUMENTATION, EVEN IF THE AUTHOR OR DISTRIBUTORS HAVE BEEN ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THE AUTHOR AND DISTRIBUTORS SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE AUTHOR AND DISTRIBUTORS HAS NO OBLIGATIONS TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  *
- * Permission to use, copy, modify, and distribute this software and
- * its documentation for any purpose and without fee is hereby
- * granted, provided that the above copyright notice appear in all
- * copies and that both that copyright notice and this permission
- * notice appear in supporting documentation, and that the name of the
- * author not be used in advertising or publicity pertaining to
- * distribution of the software without specific, written prior
- * permission. The author makes no representations about the
- * suitability of this software for any purpose.  It is provided "as
- * is" without express or implied warranty.
  */
+#include "postgres_fe.h"
 
-#include "config.h"
-
-#include <stdio.h>
-#include "postgres.h"
 #include "libpq-fe.h"
 
-#include <errno.h>
+#include <ctype.h>
 
 #ifdef WIN32
-#include "win32.h"
+#undef FD_SETSIZE
+#define FD_SETSIZE 1024
+#include <win32.h>
 #else
 #include <sys/time.h>
-#if HAVE_UNISTD_H
 #include <unistd.h>
-#endif
+#endif   /* ! WIN32 */
 
 #ifdef HAVE_GETOPT_H
 #include <getopt.h>
 #include <sys/select.h>
 #endif
 
-/* for getrlimit */
-#include <sys/resource.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>              /* for getrlimit */
+#endif
+
+extern char *optarg;
+extern int     optind;
 
-#endif  /* WIN32 */
 
 /********************************************************************
  * some configurable parameters */
 
-#define MAXCLIENTS 1024        /* max number of clients allowed */
+/* max number of clients allowed */
+#ifdef FD_SETSIZE
+#define MAXCLIENTS     (FD_SETSIZE - 10)
+#else
+#define MAXCLIENTS     1024
+#endif
 
-int nclients = 1;      /* default number of simulated clients */
-int nxacts = 10;       /* default number of transactions per clients */
+int                    nclients = 1;           /* default number of simulated clients */
+int                    nxacts = 10;            /* default number of transactions per clients */
 
 /*
- * scaling factor. for example, tps = 10 will make 1000000 tuples of
+ * scaling factor. for example, scale = 10 will make 1000000 tuples of
  * accounts table.
  */
-int tps = 1;
+int                    scale = 1;
+
+/*
+ * fillfactor. for example, fillfactor = 90 will use only 90 percent
+ * space during inserts and leave 10 percent free.
+ */
+int                    fillfactor = 100;
 
 /*
  * end of configurable parameters
@@ -67,671 +88,1875 @@ int tps = 1;
 
 #define nbranches      1
 #define ntellers       10
-#define        naccounts       100000
-
-int remains;           /* number of remained clients */
-
-typedef struct {
-  PGconn       *con;   /* connection handle to DB */
-  int  state;  /* state No. */
-  int  cnt;    /* xacts count */
-  int  ecnt;   /* error count */
-  int  listen; /* none 0 indicates that an async query has been sent */
-  int  aid;    /* account id for this transaction */
-  int  bid;    /* branch id for this transaction */
-  int  tid;    /* teller id for this transaction */
-  int  delta;
-  int  abalance;
-} CState;
-
-static void usage() {
-  fprintf(stderr,"usage: pgbench [-h hostname][-p port][-c nclients][-t ntransactions][-s scaling_factor][-n][-v][-S][-d][dbname]\n");
-  fprintf(stderr,"(initialize mode): pgbench -i [-h hostname][-p port][-s scaling_factor][-d][dbname]\n");
+#define naccounts      100000
+
+FILE      *LOGFILE = NULL;
+
+bool           use_log;                        /* log transaction latencies to a file */
+
+int                    remains;                        /* number of remaining clients */
+
+int                    is_connect;                     /* establish connection  for each transaction */
+
+char      *pghost = "";
+char      *pgport = "";
+char      *pgoptions = NULL;
+char      *pgtty = NULL;
+char      *login = NULL;
+char      *dbName;
+
+/* variable definitions */
+typedef struct
+{
+       char       *name;                       /* variable name */
+       char       *value;                      /* its value */
+}      Variable;
+
+#define MAX_FILES              128             /* max number of SQL script files allowed */
+
+/*
+ * structures used in custom query mode
+ */
+
+typedef struct
+{
+       PGconn     *con;                        /* connection handle to DB */
+       int                     id;                             /* client No. */
+       int                     state;                  /* state No. */
+       int                     cnt;                    /* xacts count */
+       int                     ecnt;                   /* error count */
+       int                     listen;                 /* 0 indicates that an async query has been
+                                                                * sent */
+       int                     sleeping;               /* 1 indicates that the client is napping */
+       struct timeval until;           /* napping until */
+       Variable   *variables;          /* array of variable definitions */
+       int                     nvariables;
+       struct timeval txn_begin;       /* used for measuring latencies */
+       int                     use_file;               /* index in sql_files for this client */
+       bool            prepared[MAX_FILES];
+}      CState;
+
+/*
+ * queries read from files
+ */
+#define SQL_COMMAND            1
+#define META_COMMAND   2
+#define MAX_ARGS               10
+
+typedef enum QueryMode
+{
+       QUERY_SIMPLE,   /* simple query */
+       QUERY_EXTENDED, /* extended query */
+       QUERY_PREPARED, /* extended query with prepared statements */
+       NUM_QUERYMODE
+} QueryMode;
+
+static QueryMode       querymode = QUERY_SIMPLE;
+static const char *QUERYMODE[] = { "simple", "extended", "prepared" };
+
+typedef struct
+{
+       int                     type;                   /* command type (SQL_COMMAND or META_COMMAND) */
+       int                     argc;                   /* number of commands */
+       char       *argv[MAX_ARGS]; /* command list */
+}      Command;
+
+Command   **sql_files[MAX_FILES];              /* SQL script files */
+int                    num_files;                      /* its number */
+
+/* default scenario */
+static char *tpc_b = {
+       "\\set nbranches :scale\n"
+       "\\set ntellers 10 * :scale\n"
+       "\\set naccounts 100000 * :scale\n"
+       "\\setrandom aid 1 :naccounts\n"
+       "\\setrandom bid 1 :nbranches\n"
+       "\\setrandom tid 1 :ntellers\n"
+       "\\setrandom delta -5000 5000\n"
+       "BEGIN;\n"
+       "UPDATE accounts SET abalance = abalance + :delta WHERE aid = :aid;\n"
+       "SELECT abalance FROM accounts WHERE aid = :aid;\n"
+       "UPDATE tellers SET tbalance = tbalance + :delta WHERE tid = :tid;\n"
+       "UPDATE branches SET bbalance = bbalance + :delta WHERE bid = :bid;\n"
+       "INSERT INTO history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);\n"
+       "END;\n"
+};
+
+/* -N case */
+static char *simple_update = {
+       "\\set nbranches :scale\n"
+       "\\set ntellers 10 * :scale\n"
+       "\\set naccounts 100000 * :scale\n"
+       "\\setrandom aid 1 :naccounts\n"
+       "\\setrandom bid 1 :nbranches\n"
+       "\\setrandom tid 1 :ntellers\n"
+       "\\setrandom delta -5000 5000\n"
+       "BEGIN;\n"
+       "UPDATE accounts SET abalance = abalance + :delta WHERE aid = :aid;\n"
+       "SELECT abalance FROM accounts WHERE aid = :aid;\n"
+       "INSERT INTO history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);\n"
+       "END;\n"
+};
+
+/* -S case */
+static char *select_only = {
+       "\\set naccounts 100000 * :scale\n"
+       "\\setrandom aid 1 :naccounts\n"
+       "SELECT abalance FROM accounts WHERE aid = :aid;\n"
+};
+
+/* Connection overhead time */
+static struct timeval conn_total_time = {0, 0};
+
+/* Calculate total time */
+static void
+addTime(struct timeval *t1, struct timeval *t2, struct timeval *result)
+{
+       int sec = t1->tv_sec + t2->tv_sec;
+       int usec = t1->tv_usec + t2->tv_usec;
+       if (usec >= 1000000)
+       {
+               usec -= 1000000;
+               sec++;
+       }
+       result->tv_sec = sec;
+       result->tv_usec = usec;
+}
+
+/* Calculate time difference */
+static void
+diffTime(struct timeval *t1, struct timeval *t2, struct timeval *result)
+{
+       int sec = t1->tv_sec - t2->tv_sec;
+       int usec = t1->tv_usec - t2->tv_usec;
+       if (usec < 0)
+       {
+               usec += 1000000;
+               sec--;
+       }
+       result->tv_sec = sec;
+       result->tv_usec = usec;
 }
 
-/* random number generator */
-static int getrand(int min, int max) {
-  return(min+(int)(max*1.0*rand()/(RAND_MAX+1.0)));
+static void
+usage(void)
+{
+       fprintf(stderr, "usage: pgbench [-h hostname][-p port][-c nclients][-t ntransactions][-s scaling_factor][-D varname=value][-n][-C][-v][-S][-N][-M querymode][-f filename][-l][-U login][-d][dbname]\n");
+       fprintf(stderr, "(initialize mode): pgbench -i [-h hostname][-p port][-s scaling_factor] [-F fillfactor] [-U login][-d][dbname]\n");
+}
+
+/* random number generator: uniform distribution from min to max inclusive */
+static int
+getrand(int min, int max)
+{
+       /*
+        * Odd coding is so that min and max have approximately the same chance of
+        * being selected as do numbers between them.
+        */
+       return min + (int) (((max - min + 1) * (double) random()) / (MAX_RANDOM_VALUE + 1.0));
+}
+
+/* call PQexec() and exit() on failure */
+static void
+executeStatement(PGconn *con, const char *sql)
+{
+       PGresult   *res;
+
+       res = PQexec(con, sql);
+       if (PQresultStatus(res) != PGRES_COMMAND_OK)
+       {
+               fprintf(stderr, "%s", PQerrorMessage(con));
+               exit(1);
+       }
+       PQclear(res);
+}
+
+/* set up a connection to the backend */
+static PGconn *
+doConnect(void)
+{
+       PGconn     *conn;
+       static char *password = NULL;
+       bool            new_pass;
+
+       /*
+        * Start the connection.  Loop until we have a password if requested by
+        * backend.
+        */
+       do
+       {
+               new_pass = false;
+
+               conn = PQsetdbLogin(pghost, pgport, pgoptions, pgtty, dbName,
+                                                       login, password);
+               if (!conn)
+               {
+                       fprintf(stderr, "Connection to database \"%s\" failed\n",
+                                       dbName);
+                       return NULL;
+               }
+
+               if (PQstatus(conn) == CONNECTION_BAD &&
+                       PQconnectionNeedsPassword(conn) &&
+                       password == NULL &&
+                       !feof(stdin))
+               {
+                       PQfinish(conn);
+                       password = simple_prompt("Password: ", 100, false);
+                       new_pass = true;
+               }
+       } while (new_pass);
+
+       /* check to see that the backend connection was successfully made */
+       if (PQstatus(conn) == CONNECTION_BAD)
+       {
+               fprintf(stderr, "Connection to database \"%s\" failed:\n%s",
+                               dbName, PQerrorMessage(conn));
+               PQfinish(conn);
+               return NULL;
+       }
+
+       executeStatement(conn, "SET search_path = public");
+
+       return conn;
 }
 
 /* throw away response from backend */
-static void discard_response(CState *state) {
-  PGresult *res;
-  do {
-    res = PQgetResult(state->con);
-    if (res)
-      PQclear(res);
-  } while(res);
+static void
+discard_response(CState * state)
+{
+       PGresult   *res;
+
+       do
+       {
+               res = PQgetResult(state->con);
+               if (res)
+                       PQclear(res);
+       } while (res);
+}
+
+/* check to see if the SQL result was good */
+static int
+check(CState * state, PGresult *res, int n)
+{
+       CState     *st = &state[n];
+
+       switch (PQresultStatus(res))
+       {
+               case PGRES_COMMAND_OK:
+               case PGRES_TUPLES_OK:
+                       /* OK */
+                       break;
+               default:
+                       fprintf(stderr, "Client %d aborted in state %d: %s",
+                                       n, st->state, PQerrorMessage(st->con));
+                       remains--;                      /* I've aborted */
+                       PQfinish(st->con);
+                       st->con = NULL;
+                       return (-1);
+       }
+       return (0);                                     /* OK */
+}
+
+static int
+compareVariables(const void *v1, const void *v2)
+{
+       return strcmp(((const Variable *) v1)->name,
+                                 ((const Variable *) v2)->name);
+}
+
+static char *
+getVariable(CState * st, char *name)
+{
+       Variable        key,
+                          *var;
+
+       /* On some versions of Solaris, bsearch of zero items dumps core */
+       if (st->nvariables <= 0)
+               return NULL;
+
+       key.name = name;
+       var = (Variable *) bsearch((void *) &key,
+                                                          (void *) st->variables,
+                                                          st->nvariables,
+                                                          sizeof(Variable),
+                                                          compareVariables);
+       if (var != NULL)
+               return var->value;
+       else
+               return NULL;
 }
 
-static int check(CState *state, PGresult *res, int n, int good)
+static int
+putVariable(CState * st, char *name, char *value)
 {
-  CState *st = &state[n];
-
-  if (res && PQresultStatus(res) != good) {
-    fprintf(stderr,"Client %d aborted in state %d: %s",n,st->state,PQerrorMessage(st->con));
-    remains--; /* I've aborted */
-    PQfinish(st->con);
-    st->con = NULL;
-    return(-1);
-  }
-  return(0);
+       Variable        key,
+                          *var;
+
+       key.name = name;
+       /* On some versions of Solaris, bsearch of zero items dumps core */
+       if (st->nvariables > 0)
+               var = (Variable *) bsearch((void *) &key,
+                                                                  (void *) st->variables,
+                                                                  st->nvariables,
+                                                                  sizeof(Variable),
+                                                                  compareVariables);
+       else
+               var = NULL;
+
+       if (var == NULL)
+       {
+               Variable   *newvars;
+
+               if (st->variables)
+                       newvars = (Variable *) realloc(st->variables,
+                                                                       (st->nvariables + 1) * sizeof(Variable));
+               else
+                       newvars = (Variable *) malloc(sizeof(Variable));
+
+               if (newvars == NULL)
+                       return false;
+
+               st->variables = newvars;
+
+               var = &newvars[st->nvariables];
+
+               var->name = NULL;
+               var->value = NULL;
+
+               if ((var->name = strdup(name)) == NULL
+                       || (var->value = strdup(value)) == NULL)
+               {
+                       free(var->name);
+                       free(var->value);
+                       return false;
+               }
+
+               st->nvariables++;
+
+               qsort((void *) st->variables, st->nvariables, sizeof(Variable),
+                         compareVariables);
+       }
+       else
+       {
+               char       *val;
+
+               if ((val = strdup(value)) == NULL)
+                       return false;
+
+               free(var->value);
+               var->value = val;
+       }
+
+       return true;
 }
 
-/* process a transaction */
-static void doOne(CState *state, int n, int debug) {
-  char sql[256];
-  PGresult   *res;
-  CState *st = &state[n];
-
-  if (st->listen) {    /* are we receiver? */
-    if (debug) {
-      fprintf(stderr,"client %d receiving\n",n);
-    }
-    while (PQisBusy(st->con) == TRUE) {
-      if (!PQconsumeInput(st->con)) {  /* there's something wrong */
-       fprintf(stderr, "Client %d aborted in state %d. Probably the backend died while processing.\n",n, st->state);
-       remains--;      /* I've aborted */
-       PQfinish(st->con);
-       st->con = NULL;
-       return;
-      }
-    }
-
-    switch (st->state) {
-    case 0:    /* response to "begin" */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_COMMAND_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-      break;
-    case 1:    /* response to "update accounts..." */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_COMMAND_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-      break;
-    case 2:    /* response to "select abalance ..." */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_TUPLES_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-      break;
-    case 3:    /* response to "update tellers ..." */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_COMMAND_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-      break;
-    case 4:    /* response to "update branches ..." */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_COMMAND_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-      break;
-    case 5:    /* response to "insert into history ..." */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_COMMAND_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-      break;
-    case 6:    /* response to "end" */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_COMMAND_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-
-      if (++st->cnt >= nxacts) {
-       remains--;      /* I've done */
-       PQfinish(st->con);
-       st->con = NULL;
-       return;
-      }
-      break;
-    }
-
-    /* increment state counter */
-    st->state++;
-    if (st->state > 6) {
-      st->state = 0;
-    }
-  }
-
-  switch (st->state) {
-  case 0:      /* about to start */
-    strcpy(sql,"begin");
-    st->aid = getrand(1,naccounts*tps);
-    st->bid = getrand(1,nbranches*tps);
-    st->tid = getrand(1,ntellers*tps);
-    st->delta = getrand(1,1000);
-    break;
-  case 1:
-    sprintf(sql,"update accounts set abalance = abalance + %d where aid = %d\n",st->delta,st->aid);
-      break;
-  case 2:
-    sprintf(sql,"select abalance from accounts where aid = %d",st->aid);
-    break;
-  case 3:
-    sprintf(sql,"update tellers set tbalance = tbalance + %d where tid = %d\n",
-           st->delta,st->tid);
-    break;
-  case 4:
-    sprintf(sql,"update branches set bbalance = bbalance + %d where bid = %d",st->delta,st->bid);
-    break;
-  case 5:
-    sprintf(sql,"insert into history(tid,bid,aid,delta,time) values(%d,%d,%d,%d,'now')",
-           st->tid,st->bid,st->aid,st->delta);
-    break;
-  case 6:
-    strcpy(sql,"end");
-    break;
-  }
-
-  if (debug) {
-    fprintf(stderr,"client %d sending %s\n",n,sql);
-  }
-  if (PQsendQuery(st->con, sql) == 0) {
-    if (debug) {
-      fprintf(stderr, "PQsendQuery(%s)failed\n",sql);
-    }
-    st->ecnt++;
-  } else {
-    st->listen++;      /* flags that should be listned */
-  }
+static char *
+parseVariable(const char *sql, int *eaten)
+{
+       int             i = 0;
+       char   *name;
+
+       do
+       {
+               i++;
+       } while (isalnum((unsigned char) sql[i]) || sql[i] == '_');
+       if (i == 1)
+               return NULL;
+
+       name = malloc(i);
+       if (name == NULL)
+               return NULL;
+       memcpy(name, &sql[1], i - 1);
+       name[i - 1] = '\0';
+
+       *eaten = i;
+       return name;
 }
 
-/* process a select only transaction */
-static void doSelectOnly(CState *state, int n, int debug) {
-  char sql[256];
-  PGresult   *res;
-  CState *st = &state[n];
-
-  if (st->listen) {    /* are we receiver? */
-    if (debug) {
-      fprintf(stderr,"client %d receiving\n",n);
-    }
-    while (PQisBusy(st->con) == TRUE) {
-      if (!PQconsumeInput(st->con)) {  /* there's something wrong */
-       fprintf(stderr, "Client %d aborted in state %d. Probably the backend died while processing.\n",n, st->state);
-       remains--;      /* I've aborted */
-       PQfinish(st->con);
-       st->con = NULL;
-       return;
-      }
-    }
-
-    switch (st->state) {
-    case 0:    /* response to "select abalance ..." */
-      res = PQgetResult(st->con);
-      if (check(state, res, n, PGRES_TUPLES_OK)) {
-       return;
-      }
-      PQclear(res);
-      discard_response(st);
-
-      if (++st->cnt >= nxacts) {
-       remains--;      /* I've done */
-       PQfinish(st->con);
-       st->con = NULL;
-       return;
-      }
-      break;
-    }
-
-    /* increment state counter */
-    st->state++;
-    if (st->state > 0) {
-      st->state = 0;
-    }
-  }
-
-  switch (st->state) {
-  case 0:
-    st->aid = getrand(1,naccounts*tps);
-    sprintf(sql,"select abalance from accounts where aid = %d",st->aid);
-    break;
-  }
-
-  if (debug) {
-    fprintf(stderr,"client %d sending %s\n",n,sql);
-  }
-
-  if (PQsendQuery(st->con, sql) == 0) {
-    if (debug) {
-      fprintf(stderr, "PQsendQuery(%s)failed\n",sql);
-    }
-    st->ecnt++;
-  } else {
-    st->listen++;      /* flags that should be listned */
-  }
+static char *
+replaceVariable(char **sql, char *param, int len, char *value)
+{
+       int     valueln = strlen(value);
+
+       if (valueln > len)
+       {
+               char   *tmp;
+               size_t  offset = param - *sql;
+
+               tmp = realloc(*sql, strlen(*sql) - len + valueln + 1);
+               if (tmp == NULL)
+               {
+                       free(*sql);
+                       return NULL;
+               }
+               *sql = tmp;
+               param = *sql + offset;
+       }
+
+       if (valueln != len)
+               memmove(param + valueln, param + len, strlen(param + len) + 1);
+       strncpy(param, value, valueln);
+
+       return param + valueln;
+}
+
+static char *
+assignVariables(CState * st, char *sql)
+{
+       char       *p,
+                          *name,
+                          *val;
+
+       p = sql;
+       while ((p = strchr(p, ':')) != NULL)
+       {
+               int             eaten;
+
+               name = parseVariable(p, &eaten);
+               if (name == NULL)
+               {
+                       while (*p == ':') { p++; }
+                       continue;
+               }
+
+               val = getVariable(st, name);
+               free(name);
+               if (val == NULL)
+               {
+                       p++;
+                       continue;
+               }
+
+               if ((p = replaceVariable(&sql, p, eaten, val)) == NULL)
+                       return NULL;
+       }
+
+       return sql;
+}
+
+static void
+getQueryParams(CState *st, const Command *command, const char **params)
+{
+       int             i;
+
+       for (i = 0; i < command->argc - 1; i++)
+               params[i] = getVariable(st, command->argv[i+1]);
+}
+
+#define MAX_PREPARE_NAME               32
+static void
+preparedStatementName(char *buffer, int file, int state)
+{
+       sprintf(buffer, "P%d_%d", file, state);
+}
+
+static void
+doCustom(CState * state, int n, int debug)
+{
+       PGresult   *res;
+       CState     *st = &state[n];
+       Command   **commands;
+
+top:
+       commands = sql_files[st->use_file];
+
+       if (st->sleeping)
+       {                                                       /* are we sleeping? */
+               int                     usec;
+               struct timeval now;
+
+               gettimeofday(&now, NULL);
+               usec = (st->until.tv_sec - now.tv_sec) * 1000000 +
+                       st->until.tv_usec - now.tv_usec;
+               if (usec <= 0)
+                       st->sleeping = 0;       /* Done sleeping, go ahead with next command */
+               else
+                       return;                         /* Still sleeping, nothing to do here */
+       }
+
+       if (st->listen)
+       {                                                       /* are we receiver? */
+               if (commands[st->state]->type == SQL_COMMAND)
+               {
+                       if (debug)
+                               fprintf(stderr, "client %d receiving\n", n);
+                       if (!PQconsumeInput(st->con))
+                       {                                       /* there's something wrong */
+                               fprintf(stderr, "Client %d aborted in state %d. Probably the backend died while processing.\n", n, st->state);
+                               remains--;              /* I've aborted */
+                               PQfinish(st->con);
+                               st->con = NULL;
+                               return;
+                       }
+                       if (PQisBusy(st->con))
+                               return;                 /* don't have the whole result yet */
+               }
+
+               /*
+                * transaction finished: record the time it took in the log
+                */
+               if (use_log && commands[st->state + 1] == NULL)
+               {
+                       double          diff;
+                       struct timeval now;
+
+                       gettimeofday(&now, NULL);
+                       diff = (int) (now.tv_sec - st->txn_begin.tv_sec) * 1000000.0 +
+                               (int) (now.tv_usec - st->txn_begin.tv_usec);
+
+                       fprintf(LOGFILE, "%d %d %.0f %d %ld %ld\n",
+                                       st->id, st->cnt, diff, st->use_file,
+                                       (long) now.tv_sec, (long) now.tv_usec);
+               }
+
+               if (commands[st->state]->type == SQL_COMMAND)
+               {
+                       res = PQgetResult(st->con);
+                       if (check(state, res, n))
+                       {
+                               PQclear(res);
+                               return;
+                       }
+                       PQclear(res);
+                       discard_response(st);
+               }
+
+               if (commands[st->state + 1] == NULL)
+               {
+                       if (is_connect)
+                       {
+                               PQfinish(st->con);
+                               st->con = NULL;
+                       }
+
+                       if (++st->cnt >= nxacts)
+                       {
+                               remains--;              /* I've done */
+                               if (st->con != NULL)
+                               {
+                                       PQfinish(st->con);
+                                       st->con = NULL;
+                               }
+                               return;
+                       }
+               }
+
+               /* increment state counter */
+               st->state++;
+               if (commands[st->state] == NULL)
+               {
+                       st->state = 0;
+                       st->use_file = getrand(0, num_files - 1);
+                       commands = sql_files[st->use_file];
+               }
+       }
+
+       if (st->con == NULL)
+       {
+               struct timeval t1, t2, t3;
+
+               gettimeofday(&t1, NULL);
+               if ((st->con = doConnect()) == NULL)
+               {
+                       fprintf(stderr, "Client %d aborted in establishing connection.\n",
+                                       n);
+                       remains--;                      /* I've aborted */
+                       PQfinish(st->con);
+                       st->con = NULL;
+                       return;
+               }
+               gettimeofday(&t2, NULL);
+               diffTime(&t2, &t1, &t3);
+               addTime(&conn_total_time, &t3, &conn_total_time);
+       }
+
+       if (use_log && st->state == 0)
+               gettimeofday(&(st->txn_begin), NULL);
+
+       if (commands[st->state]->type == SQL_COMMAND)
+       {
+               const Command  *command = commands[st->state];
+               int                             r;
+
+               if (querymode == QUERY_SIMPLE)
+               {
+                       char       *sql;
+
+                       if ((sql = strdup(command->argv[0])) == NULL
+                               || (sql = assignVariables(st, sql)) == NULL)
+                       {
+                               fprintf(stderr, "out of memory\n");
+                               st->ecnt++;
+                               return;
+                       }
+
+                       if (debug)
+                               fprintf(stderr, "client %d sending %s\n", n, sql);
+                       r = PQsendQuery(st->con, sql);
+                       free(sql);
+               }
+               else if (querymode == QUERY_EXTENDED)
+               {
+                       const char               *sql = command->argv[0];
+                       const char               *params[MAX_ARGS];
+
+                       getQueryParams(st, command, params);
+
+                       if (debug)
+                               fprintf(stderr, "client %d sending %s\n", n, sql);
+                       r = PQsendQueryParams(st->con, sql, command->argc - 1,
+                               NULL, params, NULL, NULL, 0);
+               }
+               else if (querymode == QUERY_PREPARED)
+               {
+                       char            name[MAX_PREPARE_NAME];
+                       const char *params[MAX_ARGS];
+
+                       if (!st->prepared[st->use_file])
+                       {
+                               int             j;
+
+                               for (j = 0; commands[j] != NULL; j++)
+                               {
+                                       PGresult   *res;
+                                       char            name[MAX_PREPARE_NAME];
+
+                                       if (commands[j]->type != SQL_COMMAND)
+                                               continue;
+                                       preparedStatementName(name, st->use_file, j);
+                                       res = PQprepare(st->con, name,
+                                               commands[j]->argv[0], commands[j]->argc - 1, NULL);
+                                       if (PQresultStatus(res) != PGRES_COMMAND_OK)
+                                               fprintf(stderr, "%s", PQerrorMessage(st->con));
+                                       PQclear(res);
+                               }
+                               st->prepared[st->use_file] = true;
+                       }
+
+                       getQueryParams(st, command, params);
+                       preparedStatementName(name, st->use_file, st->state);
+
+                       if (debug)
+                               fprintf(stderr, "client %d sending %s\n", n, name);
+                       r = PQsendQueryPrepared(st->con, name, command->argc - 1,
+                               params, NULL, NULL, 0);
+               }
+               else /* unknown sql mode */
+                       r = 0;
+
+               if (r == 0)
+               {
+                       if (debug)
+                               fprintf(stderr, "client %d cannot send %s\n", n, command->argv[0]);
+                       st->ecnt++;
+               }
+               else
+                       st->listen = 1;         /* flags that should be listened */
+       }
+       else if (commands[st->state]->type == META_COMMAND)
+       {
+               int                     argc = commands[st->state]->argc,
+                                       i;
+               char      **argv = commands[st->state]->argv;
+
+               if (debug)
+               {
+                       fprintf(stderr, "client %d executing \\%s", n, argv[0]);
+                       for (i = 1; i < argc; i++)
+                               fprintf(stderr, " %s", argv[i]);
+                       fprintf(stderr, "\n");
+               }
+
+               if (pg_strcasecmp(argv[0], "setrandom") == 0)
+               {
+                       char       *var;
+                       int                     min,
+                                               max;
+                       char            res[64];
+
+                       if (*argv[2] == ':')
+                       {
+                               if ((var = getVariable(st, argv[2] + 1)) == NULL)
+                               {
+                                       fprintf(stderr, "%s: undefined variable %s\n", argv[0], argv[2]);
+                                       st->ecnt++;
+                                       return;
+                               }
+                               min = atoi(var);
+                       }
+                       else
+                               min = atoi(argv[2]);
+
+#ifdef NOT_USED
+                       if (min < 0)
+                       {
+                               fprintf(stderr, "%s: invalid minimum number %d\n", argv[0], min);
+                               st->ecnt++;
+                               return;
+                       }
+#endif
+
+                       if (*argv[3] == ':')
+                       {
+                               if ((var = getVariable(st, argv[3] + 1)) == NULL)
+                               {
+                                       fprintf(stderr, "%s: undefined variable %s\n", argv[0], argv[3]);
+                                       st->ecnt++;
+                                       return;
+                               }
+                               max = atoi(var);
+                       }
+                       else
+                               max = atoi(argv[3]);
+
+                       if (max < min || max > MAX_RANDOM_VALUE)
+                       {
+                               fprintf(stderr, "%s: invalid maximum number %d\n", argv[0], max);
+                               st->ecnt++;
+                               return;
+                       }
+
+#ifdef DEBUG
+                       printf("min: %d max: %d random: %d\n", min, max, getrand(min, max));
+#endif
+                       snprintf(res, sizeof(res), "%d", getrand(min, max));
+
+                       if (putVariable(st, argv[1], res) == false)
+                       {
+                               fprintf(stderr, "%s: out of memory\n", argv[0]);
+                               st->ecnt++;
+                               return;
+                       }
+
+                       st->listen = 1;
+               }
+               else if (pg_strcasecmp(argv[0], "set") == 0)
+               {
+                       char       *var;
+                       int                     ope1,
+                                               ope2;
+                       char            res[64];
+
+                       if (*argv[2] == ':')
+                       {
+                               if ((var = getVariable(st, argv[2] + 1)) == NULL)
+                               {
+                                       fprintf(stderr, "%s: undefined variable %s\n", argv[0], argv[2]);
+                                       st->ecnt++;
+                                       return;
+                               }
+                               ope1 = atoi(var);
+                       }
+                       else
+                               ope1 = atoi(argv[2]);
+
+                       if (argc < 5)
+                               snprintf(res, sizeof(res), "%d", ope1);
+                       else
+                       {
+                               if (*argv[4] == ':')
+                               {
+                                       if ((var = getVariable(st, argv[4] + 1)) == NULL)
+                                       {
+                                               fprintf(stderr, "%s: undefined variable %s\n", argv[0], argv[4]);
+                                               st->ecnt++;
+                                               return;
+                                       }
+                                       ope2 = atoi(var);
+                               }
+                               else
+                                       ope2 = atoi(argv[4]);
+
+                               if (strcmp(argv[3], "+") == 0)
+                                       snprintf(res, sizeof(res), "%d", ope1 + ope2);
+                               else if (strcmp(argv[3], "-") == 0)
+                                       snprintf(res, sizeof(res), "%d", ope1 - ope2);
+                               else if (strcmp(argv[3], "*") == 0)
+                                       snprintf(res, sizeof(res), "%d", ope1 * ope2);
+                               else if (strcmp(argv[3], "/") == 0)
+                               {
+                                       if (ope2 == 0)
+                                       {
+                                               fprintf(stderr, "%s: division by zero\n", argv[0]);
+                                               st->ecnt++;
+                                               return;
+                                       }
+                                       snprintf(res, sizeof(res), "%d", ope1 / ope2);
+                               }
+                               else
+                               {
+                                       fprintf(stderr, "%s: unsupported operator %s\n", argv[0], argv[3]);
+                                       st->ecnt++;
+                                       return;
+                               }
+                       }
+
+                       if (putVariable(st, argv[1], res) == false)
+                       {
+                               fprintf(stderr, "%s: out of memory\n", argv[0]);
+                               st->ecnt++;
+                               return;
+                       }
+
+                       st->listen = 1;
+               }
+               else if (pg_strcasecmp(argv[0], "sleep") == 0)
+               {
+                       char       *var;
+                       int                     usec;
+                       struct timeval now;
+
+                       if (*argv[1] == ':')
+                       {
+                               if ((var = getVariable(st, argv[1] + 1)) == NULL)
+                               {
+                                       fprintf(stderr, "%s: undefined variable %s\n", argv[0], argv[1]);
+                                       st->ecnt++;
+                                       return;
+                               }
+                               usec = atoi(var);
+                       }
+                       else
+                               usec = atoi(argv[1]);
+
+                       if (argc > 2)
+                       {
+                               if (pg_strcasecmp(argv[2], "ms") == 0)
+                                       usec *= 1000;
+                               else if (pg_strcasecmp(argv[2], "s") == 0)
+                                       usec *= 1000000;
+                       }
+                       else
+                               usec *= 1000000;
+
+                       gettimeofday(&now, NULL);
+                       st->until.tv_sec = now.tv_sec + (now.tv_usec + usec) / 1000000;
+                       st->until.tv_usec = (now.tv_usec + usec) % 1000000;
+                       st->sleeping = 1;
+
+                       st->listen = 1;
+               }
+
+               goto top;
+       }
 }
 
 /* discard connections */
-static void disconnect_all(CState *state) {
-  int i;
-  for (i=0;i<nclients;i++) {
-    if (state[i].con) {
-      PQfinish(state[i].con);
-    }
-  }
+static void
+disconnect_all(CState * state)
+{
+       int                     i;
+
+       for (i = 0; i < nclients; i++)
+       {
+               if (state[i].con)
+                       PQfinish(state[i].con);
+       }
 }
 
 /* create tables and setup data */
-static void init(char *pghost, char *pgport,char *dbName) {
-  PGconn *con;
-  PGresult *res;
-  static char *DDLs[] = {
-    "drop table branches",
-    "create table branches(bid int, primary key(bid),bbalance int,filler char(88))",
-    "drop table tellers",
-    "create table tellers(tid int, primary key(tid),bid int,tbalance int,filler char(84))",
-    "drop table accounts",
-    "create table accounts(aid int,primary key(aid),bid int,abalance int,filler char(84))",
-    "drop table history",
-    "create table history(tid int,bid int,aid int,delta int,time timestamp,filler char(22))"};
-  char sql[256];
-
-  int i;
-
-  con = PQsetdb(pghost, pgport, NULL, NULL, dbName);
-  if (PQstatus(con) == CONNECTION_BAD) {
-    fprintf(stderr, "Connection to database '%s' on %s failed.\n", dbName,pghost);
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-
-  for (i=0;i<(sizeof(DDLs)/sizeof(char *));i++) {
-    res = PQexec(con,DDLs[i]);
-    if (strncmp(DDLs[i],"drop",4) && PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-  }
-
-  res = PQexec(con,"begin");
-  if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-
-  for(i = 0; i < nbranches * tps; i++) {
-    sprintf(sql,"insert into branches(bid,bbalance) values(%d,0)",i+1);
-    res = PQexec(con,sql);
-    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-  }
-
-  for(i = 0; i < ntellers * tps; i++) {
-    sprintf(sql,"insert into tellers(tid,bid,tbalance) values (%d,%d,0)"
-           ,i+1,i/ntellers+1);
-    res = PQexec(con,sql);
-    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-  }
-
-  res = PQexec(con,"copy accounts from stdin");
-  if (PQresultStatus(res) != PGRES_COPY_IN) {
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-  PQclear(res);
-
-  fprintf(stderr,"creating tables...\n");
-  for(i = 0; i < naccounts*tps; i++) {
-    int j = i + 1;
-    sprintf(sql,"%d\t%d\t%d\t\n",i+1,(i+1)/naccounts,0);
-    if (PQputline(con,sql)) {
-      fprintf(stderr,"PQputline failed\n");
-      exit(1);
-    }
-    if (j % 10000 == 0) {
-      fprintf(stderr,"%d tuples done.\n",j);
-    }
-  }
-  if (PQputline(con,"\\.\n")) {
-    fprintf(stderr,"very last PQputline failed\n");
-    exit(1);
-  }
-
-  if (PQendcopy(con)) {
-    fprintf(stderr,"PQendcopy failed\n");
-    exit(1);
-  }
-
-  res = PQexec(con,"end");
-  if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-
-  /* vacuum */
-  fprintf(stderr,"vacuum...");
-  res = PQexec(con,"vacuum analyze");
-  if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-  fprintf(stderr,"done.\n");
-
-  PQfinish(con);
+static void
+init(void)
+{
+       PGconn     *con;
+       PGresult   *res;
+       /*
+        * Note: TPC-B requires at least 100 bytes per row, and the "filler"
+        * fields in these table declarations were intended to comply with that.
+        * But because they default to NULLs, they don't actually take any
+        * space.  We could fix that by giving them non-null default values.
+        * However, that would completely break comparability of pgbench
+        * results with prior versions.  Since pgbench has never pretended
+        * to be fully TPC-B compliant anyway, we stick with the historical
+        * behavior.
+        */
+       static char *DDLs[] = {
+               "drop table if exists branches",
+               "create table branches(bid int not null,bbalance int,filler char(88)) with (fillfactor=%d)",
+               "drop table if exists tellers",
+               "create table tellers(tid int not null,bid int,tbalance int,filler char(84)) with (fillfactor=%d)",
+               "drop table if exists accounts",
+               "create table accounts(aid int not null,bid int,abalance int,filler char(84)) with (fillfactor=%d)",
+               "drop table if exists history",
+       "create table history(tid int,bid int,aid int,delta int,mtime timestamp,filler char(22))"};
+       static char *DDLAFTERs[] = {
+               "alter table branches add primary key (bid)",
+               "alter table tellers add primary key (tid)",
+       "alter table accounts add primary key (aid)"};
+
+
+       char            sql[256];
+
+       int                     i;
+
+       if ((con = doConnect()) == NULL)
+               exit(1);
+
+       for (i = 0; i < lengthof(DDLs); i++)
+       {
+               /*
+                * set fillfactor for branches, tellers and accounts tables
+                */
+               if ((strstr(DDLs[i], "create table branches") == DDLs[i]) ||
+                       (strstr(DDLs[i], "create table tellers") == DDLs[i]) ||
+                       (strstr(DDLs[i], "create table accounts") == DDLs[i]))
+               {
+                       char            ddl_stmt[128];
+
+                       snprintf(ddl_stmt, 128, DDLs[i], fillfactor);
+                       executeStatement(con, ddl_stmt);
+                       continue;
+               }
+               else
+                       executeStatement(con, DDLs[i]);
+       }
+
+       executeStatement(con, "begin");
+
+       for (i = 0; i < nbranches * scale; i++)
+       {
+               snprintf(sql, 256, "insert into branches(bid,bbalance) values(%d,0)", i + 1);
+               executeStatement(con, sql);
+       }
+
+       for (i = 0; i < ntellers * scale; i++)
+       {
+               snprintf(sql, 256, "insert into tellers(tid,bid,tbalance) values (%d,%d,0)"
+                                ,i + 1, i / ntellers + 1);
+               executeStatement(con, sql);
+       }
+
+       executeStatement(con, "commit");
+
+       /*
+        * fill the accounts table with some data
+        */
+       fprintf(stderr, "creating tables...\n");
+
+       executeStatement(con, "begin");
+       executeStatement(con, "truncate accounts");
+
+       res = PQexec(con, "copy accounts from stdin");
+       if (PQresultStatus(res) != PGRES_COPY_IN)
+       {
+               fprintf(stderr, "%s", PQerrorMessage(con));
+               exit(1);
+       }
+       PQclear(res);
+
+       for (i = 0; i < naccounts * scale; i++)
+       {
+               int                     j = i + 1;
+
+               snprintf(sql, 256, "%d\t%d\t%d\t\n", j, i / naccounts + 1, 0);
+               if (PQputline(con, sql))
+               {
+                       fprintf(stderr, "PQputline failed\n");
+                       exit(1);
+               }
+
+               if (j % 10000 == 0)
+                       fprintf(stderr, "%d tuples done.\n", j);
+       }
+       if (PQputline(con, "\\.\n"))
+       {
+               fprintf(stderr, "very last PQputline failed\n");
+               exit(1);
+       }
+       if (PQendcopy(con))
+       {
+               fprintf(stderr, "PQendcopy failed\n");
+               exit(1);
+       }
+       executeStatement(con, "commit");
+
+       /*
+        * create indexes
+        */
+       fprintf(stderr, "set primary key...\n");
+       for (i = 0; i < lengthof(DDLAFTERs); i++)
+               executeStatement(con, DDLAFTERs[i]);
+
+       /* vacuum */
+       fprintf(stderr, "vacuum...");
+       executeStatement(con, "vacuum analyze");
+
+       fprintf(stderr, "done.\n");
+       PQfinish(con);
+}
+
+/*
+ * Parse the raw sql and replace :param to $n.
+ */
+static bool
+parseQuery(Command *cmd, const char *raw_sql)
+{
+       char       *sql,
+                          *p;
+
+       sql = strdup(raw_sql);
+       if (sql == NULL)
+               return false;
+       cmd->argc = 1;
+
+       p = sql;
+       while ((p = strchr(p, ':')) != NULL)
+       {
+               char    var[12];
+               char   *name;
+               int             eaten;
+
+               name = parseVariable(p, &eaten);
+               if (name == NULL)
+               {
+                       while (*p == ':') { p++; }
+                       continue;
+               }
+
+               if (cmd->argc >= MAX_ARGS)
+               {
+                       fprintf(stderr, "statement has too many arguments (maximum is %d): %s\n", MAX_ARGS - 1, raw_sql);
+                       return false;
+               }
+
+               sprintf(var, "$%d", cmd->argc);
+               if ((p = replaceVariable(&sql, p, eaten, var)) == NULL)
+                       return false;
+
+               cmd->argv[cmd->argc] = name;
+               cmd->argc++;
+       }
+
+       cmd->argv[0] = sql;
+       return true;
+}
+
+static Command *
+process_commands(char *buf)
+{
+       const char      delim[] = " \f\n\r\t\v";
+
+       Command    *my_commands;
+       int                     j;
+       char       *p,
+                          *tok;
+
+       if ((p = strchr(buf, '\n')) != NULL)
+               *p = '\0';
+
+       p = buf;
+       while (isspace((unsigned char) *p))
+               p++;
+
+       if (*p == '\0' || strncmp(p, "--", 2) == 0)
+       {
+               return NULL;
+       }
+
+       my_commands = (Command *) malloc(sizeof(Command));
+       if (my_commands == NULL)
+       {
+               return NULL;
+       }
+
+       my_commands->argc = 0;
+
+       if (*p == '\\')
+       {
+               my_commands->type = META_COMMAND;
+
+               j = 0;
+               tok = strtok(++p, delim);
+
+               while (tok != NULL)
+               {
+                       if ((my_commands->argv[j] = strdup(tok)) == NULL)
+                               return NULL;
+
+                       my_commands->argc++;
+
+                       j++;
+                       tok = strtok(NULL, delim);
+               }
+
+               if (pg_strcasecmp(my_commands->argv[0], "setrandom") == 0)
+               {
+                       if (my_commands->argc < 4)
+                       {
+                               fprintf(stderr, "%s: missing argument\n", my_commands->argv[0]);
+                               return NULL;
+                       }
+
+                       for (j = 4; j < my_commands->argc; j++)
+                               fprintf(stderr, "%s: extra argument \"%s\" ignored\n",
+                                               my_commands->argv[0], my_commands->argv[j]);
+               }
+               else if (pg_strcasecmp(my_commands->argv[0], "set") == 0)
+               {
+                       if (my_commands->argc < 3)
+                       {
+                               fprintf(stderr, "%s: missing argument\n", my_commands->argv[0]);
+                               return NULL;
+                       }
+
+                       for (j = my_commands->argc < 5 ? 3 : 5; j < my_commands->argc; j++)
+                               fprintf(stderr, "%s: extra argument \"%s\" ignored\n",
+                                               my_commands->argv[0], my_commands->argv[j]);
+               }
+               else if (pg_strcasecmp(my_commands->argv[0], "sleep") == 0)
+               {
+                       if (my_commands->argc < 2)
+                       {
+                               fprintf(stderr, "%s: missing argument\n", my_commands->argv[0]);
+                               return NULL;
+                       }
+
+                       if (my_commands->argc >= 3)
+                       {
+                               if (pg_strcasecmp(my_commands->argv[2], "us") != 0 &&
+                                       pg_strcasecmp(my_commands->argv[2], "ms") != 0 &&
+                                       pg_strcasecmp(my_commands->argv[2], "s"))
+                               {
+                                       fprintf(stderr, "%s: unknown time unit '%s' - must be us, ms or s\n",
+                                                       my_commands->argv[0], my_commands->argv[2]);
+                                       return NULL;
+                               }
+                       }
+
+                       for (j = 3; j < my_commands->argc; j++)
+                               fprintf(stderr, "%s: extra argument \"%s\" ignored\n",
+                                               my_commands->argv[0], my_commands->argv[j]);
+               }
+               else
+               {
+                       fprintf(stderr, "Invalid command %s\n", my_commands->argv[0]);
+                       return NULL;
+               }
+       }
+       else
+       {
+               my_commands->type = SQL_COMMAND;
+
+               switch (querymode)
+               {
+                       case QUERY_SIMPLE:
+                               if ((my_commands->argv[0] = strdup(p)) == NULL)
+                                       return NULL;
+                               my_commands->argc++;
+                               break;
+                       case QUERY_EXTENDED:
+                       case QUERY_PREPARED:
+                               if (!parseQuery(my_commands, p))
+                                       return NULL;
+                               break;
+                       default:
+                               return NULL;
+               }
+       }
+
+       return my_commands;
+}
+
+static int
+process_file(char *filename)
+{
+#define COMMANDS_ALLOC_NUM 128
+
+       Command   **my_commands;
+       FILE       *fd;
+       int                     lineno;
+       char            buf[BUFSIZ];
+       int                     alloc_num;
+
+       if (num_files >= MAX_FILES)
+       {
+               fprintf(stderr, "Up to only %d SQL files are allowed\n", MAX_FILES);
+               exit(1);
+       }
+
+       alloc_num = COMMANDS_ALLOC_NUM;
+       my_commands = (Command **) malloc(sizeof(Command *) * alloc_num);
+       if (my_commands == NULL)
+               return false;
+
+       if (strcmp(filename, "-") == 0)
+               fd = stdin;
+       else if ((fd = fopen(filename, "r")) == NULL)
+       {
+               fprintf(stderr, "%s: %s\n", filename, strerror(errno));
+               return false;
+       }
+
+       lineno = 0;
+
+       while (fgets(buf, sizeof(buf), fd) != NULL)
+       {
+               Command    *commands;
+               int                     i;
+
+               i = 0;
+               while (isspace((unsigned char) buf[i]))
+                       i++;
+
+               if (buf[i] != '\0' && strncmp(&buf[i], "--", 2) != 0)
+               {
+                       commands = process_commands(&buf[i]);
+                       if (commands == NULL)
+                       {
+                               fclose(fd);
+                               return false;
+                       }
+               }
+               else
+                       continue;
+
+               my_commands[lineno] = commands;
+               lineno++;
+
+               if (lineno >= alloc_num)
+               {
+                       alloc_num += COMMANDS_ALLOC_NUM;
+                       my_commands = realloc(my_commands, sizeof(Command *) * alloc_num);
+                       if (my_commands == NULL)
+                       {
+                               fclose(fd);
+                               return false;
+                       }
+               }
+       }
+       fclose(fd);
+
+       my_commands[lineno] = NULL;
+
+       sql_files[num_files++] = my_commands;
+
+       return true;
+}
+
+static Command **
+process_builtin(char *tb)
+{
+#define COMMANDS_ALLOC_NUM 128
+
+       Command   **my_commands;
+       int                     lineno;
+       char            buf[BUFSIZ];
+       int                     alloc_num;
+
+       if (*tb == '\0')
+               return NULL;
+
+       alloc_num = COMMANDS_ALLOC_NUM;
+       my_commands = (Command **) malloc(sizeof(Command *) * alloc_num);
+       if (my_commands == NULL)
+               return NULL;
+
+       lineno = 0;
+
+       for (;;)
+       {
+               char       *p;
+               Command    *commands;
+
+               p = buf;
+               while (*tb && *tb != '\n')
+                       *p++ = *tb++;
+
+               if (*tb == '\0')
+                       break;
+
+               if (*tb == '\n')
+                       tb++;
+
+               *p = '\0';
+
+               commands = process_commands(buf);
+               if (commands == NULL)
+               {
+                       return NULL;
+               }
+
+               my_commands[lineno] = commands;
+               lineno++;
+
+               if (lineno >= alloc_num)
+               {
+                       alloc_num += COMMANDS_ALLOC_NUM;
+                       my_commands = realloc(my_commands, sizeof(Command *) * alloc_num);
+                       if (my_commands == NULL)
+                       {
+                               return NULL;
+                       }
+               }
+       }
+
+       my_commands[lineno] = NULL;
+
+       return my_commands;
 }
 
 /* print out results */
-static void printResults(
-                        int ttype, CState *state, 
-                        struct timeval *tv1,struct timeval *tv2,
-                        struct timeval *tv3) {
-  double t1,t2;
-  int i;
-  int normal_xacts = 0;
-
-  for (i=0;i<nclients;i++) {
-    normal_xacts += state[i].cnt;
-  }
-
-  t1 = (tv3->tv_sec - tv1->tv_sec)*1000000.0+(tv3->tv_usec - tv1->tv_usec);
-  t1 = normal_xacts*1000000.0/t1;
-
-  t2 = (tv3->tv_sec - tv2->tv_sec)*1000000.0+(tv3->tv_usec - tv2->tv_usec);
-  t2 = normal_xacts*1000000.0/t2;
-
-  printf("transaction type: %s\n",ttype==0?"TPC-B (sort of)":"SELECT only");
-  printf("scaling factor: %d\n",tps);
-  printf("number of clients: %d\n",nclients);
-  printf("number of transactions per client: %d\n",nxacts);
-  printf("number of transactions actually processed: %d/%d\n",normal_xacts,nxacts*nclients);
-  printf("tps = %f(including connections establishing)\n",t1);
-  printf("tps = %f(excluding connections establishing)\n",t2);
+static void
+printResults(
+                        int ttype, CState * state,
+                        struct timeval * start_time, struct timeval * end_time)
+{
+       double          t1,
+                               t2;
+       int                     i;
+       int                     normal_xacts = 0;
+       char       *s;
+
+       for (i = 0; i < nclients; i++)
+               normal_xacts += state[i].cnt;
+
+       t1 = (end_time->tv_sec - start_time->tv_sec) * 1000000.0 + (end_time->tv_usec - start_time->tv_usec);
+       t1 = normal_xacts * 1000000.0 / t1;
+
+       t2 = (end_time->tv_sec - start_time->tv_sec - conn_total_time.tv_sec) * 1000000.0 +
+               (end_time->tv_usec - start_time->tv_usec - conn_total_time.tv_usec);
+       t2 = normal_xacts * 1000000.0 / t2;
+
+       if (ttype == 0)
+               s = "TPC-B (sort of)";
+       else if (ttype == 2)
+               s = "Update only accounts";
+       else if (ttype == 1)
+               s = "SELECT only";
+       else
+               s = "Custom query";
+
+       printf("transaction type: %s\n", s);
+       printf("scaling factor: %d\n", scale);
+       printf("query mode: %s\n", QUERYMODE[querymode]);
+       printf("number of clients: %d\n", nclients);
+       printf("number of transactions per client: %d\n", nxacts);
+       printf("number of transactions actually processed: %d/%d\n", normal_xacts, nxacts * nclients);
+       printf("tps = %f (including connections establishing)\n", t1);
+       printf("tps = %f (excluding connections establishing)\n", t2);
 }
 
-int main(int argc, char **argv) {
-  extern char *optarg;
-  extern int optind, opterr, optopt;
-  int c;
-  char *pghost = "";
-  char *pgport = "";
-  char *dbName;
-  int is_init_mode = 0;        /* initialize mode? */
-  int is_no_vacuum = 0;        /* no vacuum at all before testing? */
-  int is_full_vacuum = 0;      /* do full vacuum before testing? */
-  int debug = 0;       /* debug flag */
-  int ttype = 0;       /* transaction type. 0: TPC-B, 1: SELECT only */
-
-  static CState           state[MAXCLIENTS];   /* clients status */
-
-  struct timeval tv1;  /* start up time */
-  struct timeval tv2;  /* after establishing all connections to the backend */
-  struct timeval tv3;  /* end time */
-
-  int  i;
-
-  fd_set       input_mask;
-  int nsocks;  /* return from select(2) */
-  int maxsock; /* max socket number to be waited */
-
-#ifndef __CYGWIN32__
-  struct rlimit rlim;
+
+int
+main(int argc, char **argv)
+{
+       int                     c;
+       int                     is_init_mode = 0;               /* initialize mode? */
+       int                     is_no_vacuum = 0;               /* no vacuum at all before testing? */
+       int                     do_vacuum_accounts = 0; /* do vacuum accounts before testing? */
+       int                     debug = 0;              /* debug flag */
+       int                     ttype = 0;              /* transaction type. 0: TPC-B, 1: SELECT only,
+                                                                * 2: skip update of branches and tellers */
+       char       *filename = NULL;
+
+       CState     *state;                      /* status of clients */
+
+       struct timeval start_time;                      /* start up time */
+       struct timeval end_time;                        /* end time */
+
+       int                     i;
+
+       fd_set          input_mask;
+       int                     nsocks;                 /* return from select(2) */
+       int                     maxsock;                /* max socket number to be waited */
+       struct timeval now;
+       struct timeval timeout;
+       int                     min_usec;
+
+#ifdef HAVE_GETRLIMIT
+       struct rlimit rlim;
+#endif
+
+       PGconn     *con;
+       PGresult   *res;
+       char       *env;
+
+       char            val[64];
+
+#ifdef WIN32
+       /* stderr is buffered on Win32. */
+       setvbuf(stderr, NULL, _IONBF, 0);
 #endif
 
-  PGconn *con;
-  PGresult *res;
-
-  while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:S")) != EOF) {
-    switch (c) {
-    case 'i':
-      is_init_mode++;
-      break;
-    case 'h':
-      pghost = optarg;
-      break;
-    case 'n':
-      is_no_vacuum++;
-      break;
-    case 'v':
-      is_full_vacuum++;
-      break;
-    case 'p':
-      pgport = optarg;
-      break;
-    case 'd':
-      debug++;
-      break;
-    case 'S':
-      ttype = 1;
-      break;
-    case 'c':
-      nclients = atoi(optarg);
-      if (nclients <= 0 || nclients > MAXCLIENTS) {
-       fprintf(stderr,"wrong number of clients: %d\n",nclients);
-       exit(1);
-      }
-#ifndef __CYGWIN32__
-#ifdef RLIMIT_NOFILE           /* most platform uses RLIMIT_NOFILE */
-      if (getrlimit(RLIMIT_NOFILE,&rlim) == -1) {
-#else  /* but BSD doesn't ... */
-      if (getrlimit(RLIMIT_OFILE,&rlim) == -1) {
-#endif /* HAVE_RLIMIT_NOFILE */
-       fprintf(stderr,"getrlimit failed. reason: %s\n",strerror(errno));
-       exit(1);
-      }
-      if (rlim.rlim_cur <= (nclients+2)) {
-       fprintf(stderr,"You need at least %d open files resource but you are only allowed to use %ld.\n",nclients+2,rlim.rlim_cur);
-       fprintf(stderr,"Use limit/ulimt to increase the limit before using pgbench.\n");
-       exit(1);
-      }
-#endif /* #ifndef __CYGWIN32__ */
-      break;
-    case 's':
-      tps = atoi(optarg);
-      if (tps <= 0) {
-       fprintf(stderr,"wrong scaling factor: %d\n",tps);
-       exit(1);
-      }
-      break;
-    case 't':
-      nxacts = atoi(optarg);
-      if (nxacts <= 0) {
-       fprintf(stderr,"wrong number of transactions: %d\n",nxacts);
-       exit(1);
-      }
-      break;
-    default:
-      usage();
-      exit(1);
-      break;
-    }
-  }
-
-  if (argc > optind) {
-    dbName = argv[optind];
-  } else {
-    dbName = getenv("USER");
-    if (dbName == NULL) {
-      dbName = "";
-    }
-  }
-
-  if (is_init_mode) {
-    init(pghost, pgport, dbName);
-    exit(0);
-  }
-
-  remains = nclients;
-
-  if (debug) {
-    printf("pghost: %s pgport: %s nclients: %d nxacts: %d dbName: %s\n",
-          pghost, pgport, nclients, nxacts, dbName);
-  }
-
-  /* opening connection... */
-  con = PQsetdb(pghost, pgport, NULL, NULL, dbName);
-  if (PQstatus(con) == CONNECTION_BAD) {
-    fprintf(stderr, "Connection to database '%s' failed.\n", dbName);
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-
-  /* get the scaling factor that should be same as count(*) from branches... */
-  res = PQexec(con,"select count(*) from branches");
-  if (PQresultStatus(res) != PGRES_TUPLES_OK) {
-    fprintf(stderr, "%s", PQerrorMessage(con));
-    exit(1);
-  }
-  tps = atoi(PQgetvalue(res, 0, 0));
-  if (tps < 0) {
-    fprintf(stderr,"count(*) from branches invalid (%d)\n",tps);
-    exit(1);
-  }
-  PQclear(res);
-
-  if (!is_no_vacuum) {
-    fprintf(stderr,"starting vacuum...");
-    res = PQexec(con,"vacuum branches");
-    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-
-    res = PQexec(con,"vacuum tellers");
-    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-
-    res = PQexec(con,"delete from history");
-    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-    res = PQexec(con,"vacuum history");
-    if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-      fprintf(stderr, "%s", PQerrorMessage(con));
-      exit(1);
-    }
-    PQclear(res);
-
-    fprintf(stderr,"end.\n");
-
-    if (is_full_vacuum) {
-      fprintf(stderr,"starting full vacuum...");
-      res = PQexec(con,"vacuum analyze accounts");
-      if (PQresultStatus(res) != PGRES_COMMAND_OK) {
-       fprintf(stderr, "%s", PQerrorMessage(con));
-       exit(1);
-      }
-      PQclear(res);
-      fprintf(stderr,"end.\n");
-    }
-  }
-  PQfinish(con);
-
-  /* set random seed */
-  gettimeofday(&tv1, 0);
-  srand((uint)tv1.tv_usec);
-
-  /* get start up time */
-  gettimeofday(&tv1, 0);
-
-  /* make connections to the database */
-  for (i=0;i<nclients;i++) {
-    state[i].con = PQsetdb(pghost, pgport, NULL, NULL, dbName);
-    if (PQstatus(state[i].con) == CONNECTION_BAD) {
-      fprintf(stderr, "Connection to database '%s' failed.\n", dbName);
-      fprintf(stderr, "%s", PQerrorMessage(state[i].con));
-      exit(1);
-    }
-  }
-
-  /* time after connections set up */
-  gettimeofday(&tv2, 0);
-
-  /* send start up quries in async manner */
-  for (i=0;i<nclients;i++) {
-    if (ttype == 0) {
-      doOne(state, i, debug);
-    } else if (ttype == 1) {
-      doSelectOnly(state, i, debug);
-    }
-  }
-
-  for (;;) {
-    if (remains <= 0) {        /* all done ? */
-      disconnect_all(state);
-      /* get end time */
-      gettimeofday(&tv3, 0);
-      printResults(ttype, state, &tv1,&tv2,&tv3);
-      exit(0);
-    }
-
-    FD_ZERO(&input_mask);
-
-    maxsock = 0;
-    for (i=0;i<nclients;i++) {
-      if (state[i].con) {
-       int sock = PQsocket(state[i].con);
-       if (sock < 0) {
-         fprintf(stderr,"Client %d: PQsock failed\n",i);
-         disconnect_all(state);
-         exit(1);
-       }
-       FD_SET(sock, &input_mask);
-       if (maxsock < sock) {
-         maxsock = sock;
-       }
-      }
-    }
-
-    if ((nsocks = select(maxsock +1, &input_mask, (fd_set *)NULL,
-                        (fd_set *)NULL, (struct timeval *)NULL)) < 0) {
-      if (errno == EINTR) {
-       continue;
-      }
-      /* must be something wrong */
-      disconnect_all(state);
-      fprintf(stderr,"select failed: %s\n",strerror(errno));
-      exit(1);
-    } else if (nsocks == 0) { /* timeout */
-      fprintf(stderr,"select timeout\n");
-      for (i=0;i<nclients;i++) {
-       fprintf(stderr,"client %d:state %d cnt %d ecnt %d listen %d\n",
-               i,state[i].state,state[i].cnt,state[i].ecnt,state[i].listen);
-      }
-      exit(0);
-    }
-
-    /* ok, backend returns reply */
-    for (i=0;i<nclients;i++) {
-      if (state[i].con && FD_ISSET(PQsocket(state[i].con), &input_mask)) {
-       if (ttype == 0) {
-         doOne(state, i, debug);
-       } else if (ttype == 1) {
-         doSelectOnly(state, i, debug);
-       }
-      }
-    }
-  }
+       if ((env = getenv("PGHOST")) != NULL && *env != '\0')
+               pghost = env;
+       if ((env = getenv("PGPORT")) != NULL && *env != '\0')
+               pgport = env;
+       else if ((env = getenv("PGUSER")) != NULL && *env != '\0')
+               login = env;
+
+       state = (CState *) malloc(sizeof(CState));
+       if (state == NULL)
+       {
+               fprintf(stderr, "Couldn't allocate memory for state\n");
+               exit(1);
+       }
+
+       memset(state, 0, sizeof(*state));
+
+       while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:U:CNSlf:D:F:M:")) != -1)
+       {
+               switch (c)
+               {
+                       case 'i':
+                               is_init_mode++;
+                               break;
+                       case 'h':
+                               pghost = optarg;
+                               break;
+                       case 'n':
+                               is_no_vacuum++;
+                               break;
+                       case 'v':
+                               do_vacuum_accounts++;
+                               break;
+                       case 'p':
+                               pgport = optarg;
+                               break;
+                       case 'd':
+                               debug++;
+                               break;
+                       case 'S':
+                               ttype = 1;
+                               break;
+                       case 'N':
+                               ttype = 2;
+                               break;
+                       case 'c':
+                               nclients = atoi(optarg);
+                               if (nclients <= 0 || nclients > MAXCLIENTS)
+                               {
+                                       fprintf(stderr, "invalid number of clients: %d\n", nclients);
+                                       exit(1);
+                               }
+#ifdef HAVE_GETRLIMIT
+#ifdef RLIMIT_NOFILE                   /* most platforms use RLIMIT_NOFILE */
+                               if (getrlimit(RLIMIT_NOFILE, &rlim) == -1)
+#else                                                  /* but BSD doesn't ... */
+                               if (getrlimit(RLIMIT_OFILE, &rlim) == -1)
+#endif   /* RLIMIT_NOFILE */
+                               {
+                                       fprintf(stderr, "getrlimit failed: %s\n", strerror(errno));
+                                       exit(1);
+                               }
+                               if (rlim.rlim_cur <= (nclients + 2))
+                               {
+                                       fprintf(stderr, "You need at least %d open files but you are only allowed to use %ld.\n", nclients + 2, (long) rlim.rlim_cur);
+                                       fprintf(stderr, "Use limit/ulimit to increase the limit before using pgbench.\n");
+                                       exit(1);
+                               }
+#endif   /* HAVE_GETRLIMIT */
+                               break;
+                       case 'C':
+                               is_connect = 1;
+                               break;
+                       case 's':
+                               scale = atoi(optarg);
+                               if (scale <= 0)
+                               {
+                                       fprintf(stderr, "invalid scaling factor: %d\n", scale);
+                                       exit(1);
+                               }
+                               break;
+                       case 't':
+                               nxacts = atoi(optarg);
+                               if (nxacts <= 0)
+                               {
+                                       fprintf(stderr, "invalid number of transactions: %d\n", nxacts);
+                                       exit(1);
+                               }
+                               break;
+                       case 'U':
+                               login = optarg;
+                               break;
+                       case 'l':
+                               use_log = true;
+                               break;
+                       case 'f':
+                               ttype = 3;
+                               filename = optarg;
+                               if (process_file(filename) == false || *sql_files[num_files - 1] == NULL)
+                                       exit(1);
+                               break;
+                       case 'D':
+                               {
+                                       char       *p;
+
+                                       if ((p = strchr(optarg, '=')) == NULL || p == optarg || *(p + 1) == '\0')
+                                       {
+                                               fprintf(stderr, "invalid variable definition: %s\n", optarg);
+                                               exit(1);
+                                       }
+
+                                       *p++ = '\0';
+                                       if (putVariable(&state[0], optarg, p) == false)
+                                       {
+                                               fprintf(stderr, "Couldn't allocate memory for variable\n");
+                                               exit(1);
+                                       }
+                               }
+                               break;
+                       case 'F':
+                               fillfactor = atoi(optarg);
+                               if ((fillfactor < 10) || (fillfactor > 100))
+                               {
+                                       fprintf(stderr, "invalid fillfactor: %d\n", fillfactor);
+                                       exit(1);
+                               }
+                               break;
+                       case 'M':
+                               if (num_files > 0)
+                               {
+                                       fprintf(stderr, "querymode(-M) should be specifiled before transaction scripts(-f)\n");
+                                       exit(1);
+                               }
+                               for (querymode = 0; querymode < NUM_QUERYMODE; querymode++)
+                                       if (strcmp(optarg, QUERYMODE[querymode]) == 0)
+                                               break;
+                               if (querymode >= NUM_QUERYMODE)
+                               {
+                                       fprintf(stderr, "invalid querymode(-M): %s\n", optarg);
+                                       exit(1);
+                               }
+                               break;
+                       default:
+                               usage();
+                               exit(1);
+                               break;
+               }
+       }
+
+       if (argc > optind)
+               dbName = argv[optind];
+       else
+       {
+               if ((env = getenv("PGDATABASE")) != NULL && *env != '\0')
+                       dbName = env;
+               else if (login != NULL && *login != '\0')
+                       dbName = login;
+               else
+                       dbName = "";
+       }
+
+       if (is_init_mode)
+       {
+               init();
+               exit(0);
+       }
+
+       remains = nclients;
+
+       if (getVariable(&state[0], "scale") == NULL)
+       {
+               snprintf(val, sizeof(val), "%d", scale);
+               if (putVariable(&state[0], "scale", val) == false)
+               {
+                       fprintf(stderr, "Couldn't allocate memory for variable\n");
+                       exit(1);
+               }
+       }
+
+       if (nclients > 1)
+       {
+               state = (CState *) realloc(state, sizeof(CState) * nclients);
+               if (state == NULL)
+               {
+                       fprintf(stderr, "Couldn't allocate memory for state\n");
+                       exit(1);
+               }
+
+               memset(state + 1, 0, sizeof(*state) * (nclients - 1));
+
+               snprintf(val, sizeof(val), "%d", scale);
+
+               for (i = 1; i < nclients; i++)
+               {
+                       int                     j;
+
+                       for (j = 0; j < state[0].nvariables; j++)
+                       {
+                               if (putVariable(&state[i], state[0].variables[j].name, state[0].variables[j].value) == false)
+                               {
+                                       fprintf(stderr, "Couldn't allocate memory for variable\n");
+                                       exit(1);
+                               }
+                       }
+
+                       if (putVariable(&state[i], "scale", val) == false)
+                       {
+                               fprintf(stderr, "Couldn't allocate memory for variable\n");
+                               exit(1);
+                       }
+               }
+       }
+
+       if (use_log)
+       {
+               char            logpath[64];
+
+               snprintf(logpath, 64, "pgbench_log.%d", (int) getpid());
+               LOGFILE = fopen(logpath, "w");
+
+               if (LOGFILE == NULL)
+               {
+                       fprintf(stderr, "Couldn't open logfile \"%s\": %s", logpath, strerror(errno));
+                       exit(1);
+               }
+       }
+
+       if (debug)
+       {
+               printf("pghost: %s pgport: %s nclients: %d nxacts: %d dbName: %s\n",
+                          pghost, pgport, nclients, nxacts, dbName);
+       }
+
+       /* opening connection... */
+       con = doConnect();
+       if (con == NULL)
+               exit(1);
+
+       if (PQstatus(con) == CONNECTION_BAD)
+       {
+               fprintf(stderr, "Connection to database '%s' failed.\n", dbName);
+               fprintf(stderr, "%s", PQerrorMessage(con));
+               exit(1);
+       }
+
+       if (ttype != 3)
+       {
+               /*
+                * get the scaling factor that should be same as count(*) from
+                * branches if this is not a custom query
+                */
+               res = PQexec(con, "select count(*) from branches");
+               if (PQresultStatus(res) != PGRES_TUPLES_OK)
+               {
+                       fprintf(stderr, "%s", PQerrorMessage(con));
+                       exit(1);
+               }
+               scale = atoi(PQgetvalue(res, 0, 0));
+               if (scale < 0)
+               {
+                       fprintf(stderr, "count(*) from branches invalid (%d)\n", scale);
+                       exit(1);
+               }
+               PQclear(res);
+
+               snprintf(val, sizeof(val), "%d", scale);
+               if (putVariable(&state[0], "scale", val) == false)
+               {
+                       fprintf(stderr, "Couldn't allocate memory for variable\n");
+                       exit(1);
+               }
+
+               if (nclients > 1)
+               {
+                       for (i = 1; i < nclients; i++)
+                       {
+                               if (putVariable(&state[i], "scale", val) == false)
+                               {
+                                       fprintf(stderr, "Couldn't allocate memory for variable\n");
+                                       exit(1);
+                               }
+                       }
+               }
+       }
+
+       if (!is_no_vacuum)
+       {
+               fprintf(stderr, "starting vacuum...");
+               executeStatement(con, "vacuum branches");
+               executeStatement(con, "vacuum tellers");
+               executeStatement(con, "delete from history");
+               executeStatement(con, "vacuum history");
+               fprintf(stderr, "end.\n");
+
+               if (do_vacuum_accounts)
+               {
+                       fprintf(stderr, "starting vacuum accounts...");
+                       executeStatement(con, "vacuum analyze accounts");
+                       fprintf(stderr, "end.\n");
+               }
+       }
+       PQfinish(con);
+
+       /* set random seed */
+       gettimeofday(&start_time, NULL);
+       srandom((unsigned int) start_time.tv_usec);
+
+       /* get start up time */
+       gettimeofday(&start_time, NULL);
+
+       if (is_connect == 0)
+       {
+               struct timeval t, now;
+
+               /* make connections to the database */
+               for (i = 0; i < nclients; i++)
+               {
+                       state[i].id = i;
+                       if ((state[i].con = doConnect()) == NULL)
+                               exit(1);
+               }
+               /* time after connections set up */
+               gettimeofday(&now, NULL);
+               diffTime(&now, &start_time, &t);
+               addTime(&conn_total_time, &t, &conn_total_time);
+       }
+
+       /* process bultin SQL scripts */
+       switch (ttype)
+       {
+               case 0:
+                       sql_files[0] = process_builtin(tpc_b);
+                       num_files = 1;
+                       break;
+
+               case 1:
+                       sql_files[0] = process_builtin(select_only);
+                       num_files = 1;
+                       break;
+
+               case 2:
+                       sql_files[0] = process_builtin(simple_update);
+                       num_files = 1;
+                       break;
+
+               default:
+                       break;
+       }
+
+       /* send start up queries in async manner */
+       for (i = 0; i < nclients; i++)
+       {
+               Command   **commands = sql_files[state[i].use_file];
+               int                     prev_ecnt = state[i].ecnt;
+
+               state[i].use_file = getrand(0, num_files - 1);
+               doCustom(state, i, debug);
+
+               if (state[i].ecnt > prev_ecnt && commands[state[i].state]->type == META_COMMAND)
+               {
+                       fprintf(stderr, "Client %d aborted in state %d. Execution meta-command failed.\n", i, state[i].state);
+                       remains--;                      /* I've aborted */
+                       PQfinish(state[i].con);
+                       state[i].con = NULL;
+               }
+       }
+
+       for (;;)
+       {
+               if (remains <= 0)
+               {                                               /* all done ? */
+                       disconnect_all(state);
+                       /* get end time */
+                       gettimeofday(&end_time, NULL);
+                       printResults(ttype, state, &start_time, &end_time);
+                       if (LOGFILE)
+                               fclose(LOGFILE);
+                       exit(0);
+               }
+
+               FD_ZERO(&input_mask);
+
+               maxsock = -1;
+               min_usec = -1;
+               for (i = 0; i < nclients; i++)
+               {
+                       Command   **commands = sql_files[state[i].use_file];
+
+                       if (state[i].sleeping)
+                       {
+                               int                     this_usec;
+                               int                     sock = PQsocket(state[i].con);
+
+                               if (min_usec < 0)
+                               {
+                                       gettimeofday(&now, NULL);
+                                       min_usec = 0;
+                               }
+
+                               this_usec = (state[i].until.tv_sec - now.tv_sec) * 1000000 +
+                                       state[i].until.tv_usec - now.tv_usec;
+
+                               if (this_usec > 0 && (min_usec == 0 || this_usec < min_usec))
+                                       min_usec = this_usec;
+
+                               FD_SET(sock, &input_mask);
+                               if (maxsock < sock)
+                                       maxsock = sock;
+                       }
+                       else if (state[i].con && commands[state[i].state]->type != META_COMMAND)
+                       {
+                               int                     sock = PQsocket(state[i].con);
+
+                               if (sock < 0)
+                               {
+                                       disconnect_all(state);
+                                       exit(1);
+                               }
+                               FD_SET(sock, &input_mask);
+                               if (maxsock < sock)
+                                       maxsock = sock;
+                       }
+               }
+
+               if (maxsock != -1)
+               {
+                       if (min_usec >= 0)
+                       {
+                               timeout.tv_sec = min_usec / 1000000;
+                               timeout.tv_usec = min_usec % 1000000;
+
+                               nsocks = select(maxsock + 1, &input_mask, (fd_set *) NULL,
+                                                               (fd_set *) NULL, &timeout);
+                       }
+                       else
+                               nsocks = select(maxsock + 1, &input_mask, (fd_set *) NULL,
+                                                               (fd_set *) NULL, (struct timeval *) NULL);
+                       if (nsocks < 0)
+                       {
+                               if (errno == EINTR)
+                                       continue;
+                               /* must be something wrong */
+                               disconnect_all(state);
+                               fprintf(stderr, "select failed: %s\n", strerror(errno));
+                               exit(1);
+                       }
+#ifdef NOT_USED
+                       else if (nsocks == 0)
+                       {                                       /* timeout */
+                               fprintf(stderr, "select timeout\n");
+                               for (i = 0; i < nclients; i++)
+                               {
+                                       fprintf(stderr, "client %d:state %d cnt %d ecnt %d listen %d\n",
+                                                       i, state[i].state, state[i].cnt, state[i].ecnt, state[i].listen);
+                               }
+                               exit(0);
+                       }
+#endif
+               }
+
+               /* ok, backend returns reply */
+               for (i = 0; i < nclients; i++)
+               {
+                       Command   **commands = sql_files[state[i].use_file];
+                       int                     prev_ecnt = state[i].ecnt;
+
+                       if (state[i].con && (FD_ISSET(PQsocket(state[i].con), &input_mask)
+                                                 || commands[state[i].state]->type == META_COMMAND))
+                       {
+                               doCustom(state, i, debug);
+                       }
+
+                       if (state[i].ecnt > prev_ecnt && commands[state[i].state]->type == META_COMMAND)
+                       {
+                               fprintf(stderr, "Client %d aborted in state %d. Execution of meta-command failed.\n", i, state[i].state);
+                               remains--;              /* I've aborted */
+                               PQfinish(state[i].con);
+                               state[i].con = NULL;
+                       }
+               }
+       }
 }