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a89c46f9bc
This patch implements parallel copying/linking of files by tablespace using the --jobs option in pg_upgrade.
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
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* tablespace.c
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*
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* tablespace functions
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*
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* Copyright (c) 2010-2013, PostgreSQL Global Development Group
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* contrib/pg_upgrade/tablespace.c
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*/
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#include "postgres.h"
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#include "pg_upgrade.h"
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static void get_tablespace_paths(void);
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static void set_tablespace_directory_suffix(ClusterInfo *cluster);
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void
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init_tablespaces(void)
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{
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get_tablespace_paths();
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set_tablespace_directory_suffix(&old_cluster);
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set_tablespace_directory_suffix(&new_cluster);
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if (os_info.num_old_tablespaces > 0 &&
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strcmp(old_cluster.tablespace_suffix, new_cluster.tablespace_suffix) == 0)
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pg_log(PG_FATAL,
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"Cannot upgrade to/from the same system catalog version when\n"
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"using tablespaces.\n");
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}
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/*
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* get_tablespace_paths()
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*
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* Scans pg_tablespace and returns a malloc'ed array of all tablespace
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* paths. Its the caller's responsibility to free the array.
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*/
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static void
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get_tablespace_paths(void)
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{
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PGconn *conn = connectToServer(&old_cluster, "template1");
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PGresult *res;
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int tblnum;
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int i_spclocation;
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char query[QUERY_ALLOC];
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snprintf(query, sizeof(query),
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"SELECT %s "
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"FROM pg_catalog.pg_tablespace "
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"WHERE spcname != 'pg_default' AND "
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" spcname != 'pg_global'",
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/* 9.2 removed the spclocation column */
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(GET_MAJOR_VERSION(old_cluster.major_version) <= 901) ?
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"spclocation" : "pg_catalog.pg_tablespace_location(oid) AS spclocation");
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res = executeQueryOrDie(conn, "%s", query);
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if ((os_info.num_old_tablespaces = PQntuples(res)) != 0)
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os_info.old_tablespaces = (char **) pg_malloc(
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os_info.num_old_tablespaces * sizeof(char *));
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else
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os_info.old_tablespaces = NULL;
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i_spclocation = PQfnumber(res, "spclocation");
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for (tblnum = 0; tblnum < os_info.num_old_tablespaces; tblnum++)
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os_info.old_tablespaces[tblnum] = pg_strdup(
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PQgetvalue(res, tblnum, i_spclocation));
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PQclear(res);
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PQfinish(conn);
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return;
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}
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static void
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set_tablespace_directory_suffix(ClusterInfo *cluster)
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{
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if (GET_MAJOR_VERSION(cluster->major_version) <= 804)
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cluster->tablespace_suffix = pg_strdup("");
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else
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{
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/* This cluster has a version-specific subdirectory */
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cluster->tablespace_suffix = pg_malloc(4 +
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strlen(cluster->major_version_str) +
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10 /* OIDCHARS */ + 1);
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/* The leading slash is needed to start a new directory. */
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sprintf(cluster->tablespace_suffix, "/PG_%s_%d", cluster->major_version_str,
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cluster->controldata.cat_ver);
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}
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}
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