mirror of
https://github.com/EnterpriseDB/repmgr.git
synced 2026-03-23 07:06:30 +00:00
ae628d0527
- Add checks to test if the directories are useful for us (basically the checks follow the same approach as initdb does) - Add connection parameters - Better use of rsync - Some more clean up of code Changes in repmgrd are: - Add a parameter to allow the user specify an repmgr.conf - Change the name of the repl_status table for repl_monitor - Create a repl_status view that also shows lag in time - Some more clean up of code
136 lines
2.6 KiB
C
136 lines
2.6 KiB
C
/*
|
|
* dbutils.c
|
|
* Copyright (c) 2ndQuadrant, 2010
|
|
*
|
|
* Database connection/management functions
|
|
*
|
|
*/
|
|
|
|
#include "repmgr.h"
|
|
|
|
PGconn *
|
|
establishDBConnection(const char *conninfo, const bool exit_on_error)
|
|
{
|
|
PGconn *conn;
|
|
/* Make a connection to the database */
|
|
conn = PQconnectdb(conninfo);
|
|
/* Check to see that the backend connection was successfully made */
|
|
if ((PQstatus(conn) != CONNECTION_OK))
|
|
{
|
|
fprintf(stderr, "Connection to database failed: %s",
|
|
PQerrorMessage(conn));
|
|
if (exit_on_error)
|
|
{
|
|
PQfinish(conn);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
return conn;
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
is_standby(PGconn *conn)
|
|
{
|
|
PGresult *res;
|
|
bool result;
|
|
|
|
res = PQexec(conn, "SELECT pg_is_in_recovery()");
|
|
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
|
{
|
|
fprintf(stderr, "Can't query server mode: %s", PQerrorMessage(conn));
|
|
PQclear(res);
|
|
PQfinish(conn);
|
|
exit(1);
|
|
}
|
|
|
|
if (strcmp(PQgetvalue(res, 0, 0), "f") == 0)
|
|
result = false;
|
|
else
|
|
result = true;
|
|
|
|
PQclear(res);
|
|
return result;
|
|
}
|
|
|
|
|
|
bool
|
|
is_supported_version(PGconn *conn)
|
|
{
|
|
PGresult *res;
|
|
int major_version;
|
|
|
|
res = PQexec(conn, "SELECT split_part(split_part(version(), ' ', 2), '.', 1)");
|
|
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
|
{
|
|
fprintf(stderr, "PQexec failed: %s", PQerrorMessage(conn));
|
|
PQclear(res);
|
|
PQfinish(conn);
|
|
exit(1);
|
|
}
|
|
major_version = atoi(PQgetvalue(res, 0, 0));
|
|
PQclear(res);
|
|
|
|
return (major_version >= 9) ? true : false;
|
|
}
|
|
|
|
|
|
bool
|
|
guc_setted(PGconn *conn, const char *parameter, const char *op, const char *value)
|
|
{
|
|
PGresult *res;
|
|
char sqlquery[8192];
|
|
|
|
sprintf(sqlquery, "SELECT true FROM pg_settings "
|
|
" WHERE name = '%s' AND setting %s '%s'",
|
|
parameter, op, value);
|
|
|
|
res = PQexec(conn, sqlquery);
|
|
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
|
{
|
|
fprintf(stderr, "PQexec failed: %s", PQerrorMessage(conn));
|
|
PQclear(res);
|
|
PQfinish(conn);
|
|
exit(1);
|
|
}
|
|
if (PQgetisnull(res, 0, 0))
|
|
{
|
|
PQclear(res);
|
|
return false;
|
|
}
|
|
if (strcmp(PQgetvalue(res, 0, 0), "f") == 0)
|
|
{
|
|
PQclear(res);
|
|
return false;
|
|
}
|
|
PQclear(res);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
char *
|
|
get_cluster_size(PGconn *conn)
|
|
{
|
|
PGresult *res;
|
|
char *size;
|
|
char sqlquery[8192];
|
|
|
|
sprintf(sqlquery, "SELECT pg_size_pretty(SUM(pg_database_size(oid))::bigint) "
|
|
" FROM pg_database ");
|
|
|
|
res = PQexec(conn, sqlquery);
|
|
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
|
{
|
|
fprintf(stderr, "PQexec failed: %s", PQerrorMessage(conn));
|
|
PQclear(res);
|
|
PQfinish(conn);
|
|
exit(1);
|
|
}
|
|
strcpy(size, PQgetvalue(res, 0, 0))
|
|
PQclear(res);
|
|
return size;
|
|
}
|