*
* Copyright 2000 by PostgreSQL Global Development Group
*
- * $Header: /cvsroot/pgsql/src/bin/psql/common.c,v 1.53 2003/01/07 22:23:17 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/bin/psql/common.c,v 1.54 2003/02/19 03:54:39 momjian Exp $
*/
#include "postgres_fe.h"
#include "common.h"
#include "print.h"
#include "mainloop.h"
+
+/* Workarounds for Windows */
+/* Probably to be moved up the source tree in the future, perhaps to be replaced by
+ * more specific checks like configure-style HAVE_GETTIMEOFDAY macros.
+ */
+#ifndef WIN32
+
+typedef struct timeval TimevalStruct;
+#define GETTIMEOFDAY(T) gettimeofday(T, NULL)
+#define DIFF_MSEC(T, U) ((((T)->tv_sec - (U)->tv_sec) * 1000000.0 + (T)->tv_usec - (U)->tv_usec) / 1000.0)
+
+#else
+
+typedef struct _timeb TimevalStruct;
+#define GETTIMEOFDAY(T) _ftime(&T)
+#define DIFF_MSEC(T, U) ((((T)->time - (U)->time) * 1000.0 + (T)->millitm - (U)->millitm))
+
+#endif
+
+
extern bool prompt_state;
/*
#endif /* not WIN32 */
+
+/* ConnectionUp
+ *
+ * Returns whether our backend connection is still there.
+ */
+static bool
+ConnectionUp()
+{
+ return PQstatus(pset.db) != CONNECTION_BAD;
+}
+
+
+
+/* CheckConnection
+ *
+ * Verify that we still have a good connection to the backend, and if not,
+ * see if it can be restored.
+ *
+ * Returns true if either the connection was still there, or it could be
+ * restored successfully; false otherwise. If, however, there was no
+ * connection and the session is non-interactive, this will exit the program
+ * with a code of EXIT_BADCONN.
+ */
+static bool
+CheckConnection()
+{
+ bool OK = ConnectionUp();
+ if (!OK)
+ {
+ if (!pset.cur_cmd_interactive)
+ {
+ psql_error("connection to server was lost\n");
+ exit(EXIT_BADCONN);
+ }
+
+ fputs(gettext("The connection to the server was lost. Attempting reset: "), stderr);
+ PQreset(pset.db);
+ OK = ConnectionUp();
+ if (!OK)
+ {
+ fputs(gettext("Failed.\n"), stderr);
+ PQfinish(pset.db);
+ pset.db = NULL;
+ SetVariable(pset.vars, "DBNAME", NULL);
+ SetVariable(pset.vars, "HOST", NULL);
+ SetVariable(pset.vars, "PORT", NULL);
+ SetVariable(pset.vars, "USER", NULL);
+ SetVariable(pset.vars, "ENCODING", NULL);
+ }
+ else
+ fputs(gettext("Succeeded.\n"), stderr);
+ }
+
+ return OK;
+}
+
+
/*
* PSQLexec
*
cancelConn = pset.db;
if (PQsendQuery(pset.db, query))
{
- while ((newres = PQgetResult(pset.db)) != NULL)
+ rstatus = PGRES_EMPTY_QUERY;
+
+ while (((newres = PQgetResult(pset.db)) != NULL) &&
+ (rstatus == PGRES_COPY_IN) &&
+ (rstatus == PGRES_COPY_OUT))
{
rstatus = PQresultStatus(newres);
if (ignore_command_ok && rstatus == PGRES_COMMAND_OK)
{
PQclear(newres);
- continue;
}
- PQclear(res);
- res = newres;
- if (rstatus == PGRES_COPY_IN ||
- rstatus == PGRES_COPY_OUT)
- break;
+ else
+ {
+ PQclear(res);
+ res = newres;
+ }
}
}
rstatus = PQresultStatus(res);
rstatus == PGRES_COPY_IN ||
rstatus == PGRES_COPY_OUT))
return res;
- else
+
+ psql_error("%s", PQerrorMessage(pset.db));
+ PQclear(res);
+
+ CheckConnection();
+
+ return NULL;
+}
+
+
+
+/*
+ * PrintNotifications: check for asynchronous notifications, and print them out
+ *
+ */
+static void
+PrintNotifications(void)
+{
+ PGnotify *notify;
+
+ while ((notify = PQnotifies(pset.db)) != NULL)
{
- psql_error("%s", PQerrorMessage(pset.db));
- PQclear(res);
+ fprintf(pset.queryFout, gettext("Asynchronous NOTIFY '%s' from backend with pid %d received.\n"),
+ notify->relname, notify->be_pid);
+ free(notify);
+ fflush(pset.queryFout);
+ }
+}
+
- if (PQstatus(pset.db) == CONNECTION_BAD)
+/*
+ * PrintQueryTuples: assuming query result is OK, print its tuples
+ *
+ * Returns true if successful, false otherwise.
+ */
+static bool
+PrintQueryTuples(const PGresult *results)
+{
+ /* write output to \g argument, if any */
+ if (pset.gfname)
+ {
+ FILE *queryFout_copy = pset.queryFout;
+ bool queryFoutPipe_copy = pset.queryFoutPipe;
+
+ pset.queryFout = stdout; /* so it doesn't get
+ * closed */
+
+ /* open file/pipe */
+ if (!setQFout(pset.gfname))
{
- if (!pset.cur_cmd_interactive)
- {
- psql_error("connection to server was lost\n");
- exit(EXIT_BADCONN);
- }
- fputs(gettext("The connection to the server was lost. Attempting reset: "), stderr);
- PQreset(pset.db);
- if (PQstatus(pset.db) == CONNECTION_BAD)
- {
- fputs(gettext("Failed.\n"), stderr);
- PQfinish(pset.db);
- pset.db = NULL;
- SetVariable(pset.vars, "DBNAME", NULL);
- SetVariable(pset.vars, "HOST", NULL);
- SetVariable(pset.vars, "PORT", NULL);
- SetVariable(pset.vars, "USER", NULL);
- SetVariable(pset.vars, "ENCODING", NULL);
- }
- else
- fputs(gettext("Succeeded.\n"), stderr);
+ pset.queryFout = queryFout_copy;
+ pset.queryFoutPipe = queryFoutPipe_copy;
+ return false;
}
- return NULL;
+ printQuery(results, &pset.popt, pset.queryFout);
+
+ /* close file/pipe, restore old setting */
+ setQFout(NULL);
+
+ pset.queryFout = queryFout_copy;
+ pset.queryFoutPipe = queryFoutPipe_copy;
+
+ free(pset.gfname);
+ pset.gfname = NULL;
}
+ else
+ {
+ printQuery(results, &pset.popt, pset.queryFout);
+ }
+
+ return true;
+}
+
+
+
+/*
+ * PrintQueryResults: analyze query results and print them out
+ *
+ * Note: Utility function for use by SendQuery() only.
+ *
+ * Returns true if the query executed successfully, false otherwise.
+ */
+static bool
+PrintQueryResults(PGresult *results,
+ const TimevalStruct *before,
+ const TimevalStruct *after)
+{
+ bool success = false;
+
+ switch (PQresultStatus(results))
+ {
+ case PGRES_TUPLES_OK:
+ success = PrintQueryTuples(results);
+ break;
+ case PGRES_EMPTY_QUERY:
+ success = true;
+ break;
+ case PGRES_COMMAND_OK:
+ {
+ char buf[10];
+
+ success = true;
+ sprintf(buf, "%u", (unsigned int) PQoidValue(results));
+ if (!QUIET())
+ fprintf(pset.queryFout, "%s\n", PQcmdStatus(results));
+ SetVariable(pset.vars, "LASTOID", buf);
+ break;
+ }
+ case PGRES_COPY_OUT:
+ success = handleCopyOut(pset.db, pset.queryFout);
+ break;
+
+ case PGRES_COPY_IN:
+ if (pset.cur_cmd_interactive && !QUIET())
+ puts(gettext("Enter data to be copied followed by a newline.\n"
+ "End with a backslash and a period on a line by itself."));
+
+ success = handleCopyIn(pset.db, pset.cur_cmd_source,
+ pset.cur_cmd_interactive ? get_prompt(PROMPT_COPY) : NULL);
+ break;
+
+ case PGRES_NONFATAL_ERROR:
+ case PGRES_FATAL_ERROR:
+ case PGRES_BAD_RESPONSE:
+ success = false;
+ psql_error("%s", PQerrorMessage(pset.db));
+ break;
+ }
+
+ fflush(pset.queryFout);
+
+ if (!CheckConnection()) return false;
+
+ PrintNotifications();
+
+ /* Possible microtiming output */
+ if (pset.timing && success)
+ printf(gettext("Time: %.2f ms\n"), DIFF_MSEC(after, before));
+
+ return success;
}
bool
SendQuery(const char *query)
{
- bool success = false;
PGresult *results;
- PGnotify *notify;
-#ifndef WIN32
- struct timeval before,
- after;
-#else
- struct _timeb before,
- after;
-#endif
+ TimevalStruct before, after;
if (!pset.db)
{
cancelConn = pset.db;
-#ifndef WIN32
if (pset.timing)
- gettimeofday(&before, NULL);
+ GETTIMEOFDAY(&before);
results = PQexec(pset.db, query);
if (pset.timing)
- gettimeofday(&after, NULL);
-#else
- if (pset.timing)
- _ftime(&before);
- results = PQexec(pset.db, query);
- if (pset.timing)
- _ftime(&after);
-#endif
+ GETTIMEOFDAY(&after);
if (PQresultStatus(results) == PGRES_COPY_IN)
copy_in_state = true;
if (results == NULL)
{
fputs(PQerrorMessage(pset.db), pset.queryFout);
- success = false;
- }
- else
- {
- switch (PQresultStatus(results))
- {
- case PGRES_TUPLES_OK:
- /* write output to \g argument, if any */
- if (pset.gfname)
- {
- FILE *queryFout_copy = pset.queryFout;
- bool queryFoutPipe_copy = pset.queryFoutPipe;
-
- pset.queryFout = stdout; /* so it doesn't get
- * closed */
-
- /* open file/pipe */
- if (!setQFout(pset.gfname))
- {
- pset.queryFout = queryFout_copy;
- pset.queryFoutPipe = queryFoutPipe_copy;
- success = false;
- break;
- }
-
- printQuery(results, &pset.popt, pset.queryFout);
-
- /* close file/pipe, restore old setting */
- setQFout(NULL);
-
- pset.queryFout = queryFout_copy;
- pset.queryFoutPipe = queryFoutPipe_copy;
-
- free(pset.gfname);
- pset.gfname = NULL;
-
- success = true;
- }
- else
- {
- printQuery(results, &pset.popt, pset.queryFout);
- success = true;
- }
- break;
- case PGRES_EMPTY_QUERY:
- success = true;
- break;
- case PGRES_COMMAND_OK:
- {
- char buf[10];
-
- success = true;
- sprintf(buf, "%u", (unsigned int) PQoidValue(results));
- if (!QUIET())
- fprintf(pset.queryFout, "%s\n", PQcmdStatus(results));
- SetVariable(pset.vars, "LASTOID", buf);
- break;
- }
- case PGRES_COPY_OUT:
- success = handleCopyOut(pset.db, pset.queryFout);
- break;
-
- case PGRES_COPY_IN:
- if (pset.cur_cmd_interactive && !QUIET())
- puts(gettext("Enter data to be copied followed by a newline.\n"
- "End with a backslash and a period on a line by itself."));
-
- success = handleCopyIn(pset.db, pset.cur_cmd_source,
- pset.cur_cmd_interactive ? get_prompt(PROMPT_COPY) : NULL);
- break;
-
- case PGRES_NONFATAL_ERROR:
- case PGRES_FATAL_ERROR:
- case PGRES_BAD_RESPONSE:
- success = false;
- psql_error("%s", PQerrorMessage(pset.db));
- break;
- }
-
- fflush(pset.queryFout);
-
- if (PQstatus(pset.db) == CONNECTION_BAD)
- {
- if (!pset.cur_cmd_interactive)
- {
- psql_error("connection to server was lost\n");
- exit(EXIT_BADCONN);
- }
- fputs(gettext("The connection to the server was lost. Attempting reset: "), stderr);
- PQreset(pset.db);
- if (PQstatus(pset.db) == CONNECTION_BAD)
- {
- fputs(gettext("Failed.\n"), stderr);
- PQfinish(pset.db);
- PQclear(results);
- pset.db = NULL;
- SetVariable(pset.vars, "DBNAME", NULL);
- SetVariable(pset.vars, "HOST", NULL);
- SetVariable(pset.vars, "PORT", NULL);
- SetVariable(pset.vars, "USER", NULL);
- SetVariable(pset.vars, "ENCODING", NULL);
- return false;
- }
- else
- fputs(gettext("Succeeded.\n"), stderr);
- }
-
- /* check for asynchronous notification returns */
- while ((notify = PQnotifies(pset.db)) != NULL)
- {
- fprintf(pset.queryFout, gettext("Asynchronous NOTIFY '%s' from backend with pid %d received.\n"),
- notify->relname, notify->be_pid);
- free(notify);
- fflush(pset.queryFout);
- }
-
- if (results)
- PQclear(results);
+ return false;
}
- /* Possible microtiming output */
- if (pset.timing && success)
-#ifndef WIN32
- printf(gettext("Time: %.2f ms\n"),
- ((after.tv_sec - before.tv_sec) * 1000000.0 + after.tv_usec - before.tv_usec) / 1000.0);
-#else
- printf(gettext("Time: %.2f ms\n"),
- ((after.time - before.time) * 1000.0 + after.millitm - before.millitm));
-#endif
-
- return success;
+ return PrintQueryResults(results, &before, &after);
+ PQclear(results);
}
projects / postgresql / commitdiff