* A simple benchmark program for PostgreSQL
* Originally written by Tatsuo Ishii and enhanced by many contributors.
*
- * $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.78 2008/03/19 00:29:35 ishii Exp $
+ * $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;
*
char *value; /* its value */
} Variable;
+#define MAX_FILES 128 /* max number of SQL script files allowed */
+
/*
* structures used in custom query mode
*/
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;
/*
#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) */
char *argv[MAX_ARGS]; /* command list */
} Command;
-#define MAX_FILES 128 /* max number of SQL script files allowed */
-
Command **sql_files[MAX_FILES]; /* SQL script files */
int num_files; /* its number */
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][-f filename][-l][-U login][-d][dbname]\n");
+ 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");
}
return true;
}
+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;
+}
+
+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)
{
- int i,
- j;
char *p,
*name,
*val;
- void *tmp;
- i = 0;
- while ((p = strchr(&sql[i], ':')) != NULL)
+ p = sql;
+ while ((p = strchr(p, ':')) != NULL)
{
- i = j = p - sql;
- do
+ int eaten;
+
+ name = parseVariable(p, &eaten);
+ if (name == NULL)
{
- i++;
- } while (isalnum((unsigned char) sql[i]) || sql[i] == '_');
- if (i == j + 1)
+ while (*p == ':') { p++; }
continue;
+ }
- name = malloc(i - j);
- if (name == NULL)
- return NULL;
- memcpy(name, &sql[j + 1], i - (j + 1));
- name[i - (j + 1)] = '\0';
val = getVariable(st, name);
free(name);
if (val == NULL)
- continue;
-
- if (strlen(val) > i - j)
{
- tmp = realloc(sql, strlen(sql) - (i - j) + strlen(val) + 1);
- if (tmp == NULL)
- {
- free(sql);
- return NULL;
- }
- sql = tmp;
+ p++;
+ continue;
}
- if (strlen(val) != i - j)
- memmove(&sql[j + strlen(val)], &sql[i], strlen(&sql[i]) + 1);
+ if ((p = replaceVariable(&sql, p, eaten, val)) == NULL)
+ return NULL;
+ }
- strncpy(&sql[j], val, strlen(val));
+ return sql;
+}
- if (strlen(val) < i - j)
- {
- tmp = realloc(sql, strlen(sql) + 1);
- if (tmp == NULL)
- {
- free(sql);
- return NULL;
- }
- sql = tmp;
- }
+static void
+getQueryParams(CState *st, const Command *command, const char **params)
+{
+ int i;
- i = j + strlen(val);
- }
+ for (i = 0; i < command->argc - 1; i++)
+ params[i] = getVariable(st, command->argv[i+1]);
+}
- return sql;
+#define MAX_PREPARE_NAME 32
+static void
+preparedStatementName(char *buffer, int file, int state)
+{
+ sprintf(buffer, "P%d_%d", file, state);
}
static void
if (commands[st->state]->type == SQL_COMMAND)
{
- char *sql;
+ const Command *command = commands[st->state];
+ int r;
- if ((sql = strdup(commands[st->state]->argv[0])) == NULL
- || (sql = assignVariables(st, sql)) == NULL)
+ if (querymode == QUERY_SIMPLE)
{
- fprintf(stderr, "out of memory\n");
- st->ecnt++;
- return;
+ 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];
- if (debug)
- fprintf(stderr, "client %d sending %s\n", n, sql);
- if (PQsendQuery(st->con, sql) == 0)
+ 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, "PQsendQuery(%s)failed\n", sql);
+ fprintf(stderr, "client %d cannot send %s\n", n, command->argv[0]);
st->ecnt++;
}
else
- {
st->listen = 1; /* flags that should be listened */
- }
- free(sql);
}
else if (commands[st->state]->type == META_COMMAND)
{
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)
{
{
my_commands->type = SQL_COMMAND;
- if ((my_commands->argv[0] = strdup(p)) == NULL)
- return NULL;
-
- my_commands->argc++;
+ 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;
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);
memset(state, 0, sizeof(*state));
- while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:U:CNSlf:D:F:")) != -1)
+ while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:U:CNSlf:D:F:M:")) != -1)
{
switch (c)
{
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);
projects / postgresql / commitdiff