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5faef9d582
These functions already had the free()-like behavior of handling null pointers as a no-op. But it wasn't documented, so add it explicitly to the documentation, too. Discussion: https://www.postgresql.org/message-id/flat/dac5d2d0-98f5-94d9-8e69-46da2413593d%40enterprisedb.com
92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* Facilities for frontend code to query a databases.
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*
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* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/fe_utils/query_utils.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include "common/logging.h"
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#include "fe_utils/cancel.h"
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#include "fe_utils/query_utils.h"
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/*
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* Run a query, return the results, exit program on failure.
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*/
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PGresult *
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executeQuery(PGconn *conn, const char *query, bool echo)
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{
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PGresult *res;
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if (echo)
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printf("%s\n", query);
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res = PQexec(conn, query);
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if (!res ||
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PQresultStatus(res) != PGRES_TUPLES_OK)
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{
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pg_log_error("query failed: %s", PQerrorMessage(conn));
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pg_log_error_detail("Query was: %s", query);
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PQfinish(conn);
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exit(1);
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}
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return res;
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}
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/*
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* As above for a SQL command (which returns nothing).
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*/
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void
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executeCommand(PGconn *conn, const char *query, bool echo)
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{
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PGresult *res;
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if (echo)
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printf("%s\n", query);
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res = PQexec(conn, query);
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if (!res ||
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PQresultStatus(res) != PGRES_COMMAND_OK)
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{
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pg_log_error("query failed: %s", PQerrorMessage(conn));
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pg_log_error_detail("Query was: %s", query);
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PQfinish(conn);
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exit(1);
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}
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PQclear(res);
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}
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/*
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* As above for a SQL maintenance command (returns command success).
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* Command is executed with a cancel handler set, so Ctrl-C can
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* interrupt it.
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*/
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bool
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executeMaintenanceCommand(PGconn *conn, const char *query, bool echo)
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{
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PGresult *res;
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bool r;
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if (echo)
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printf("%s\n", query);
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SetCancelConn(conn);
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res = PQexec(conn, query);
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ResetCancelConn();
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r = (res && PQresultStatus(res) == PGRES_COMMAND_OK);
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PQclear(res);
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return r;
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}
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