database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

Add pg_upgrade to /contrib; will be in 9.0 beta2.

Browse Source 
Add documentation.

Supports migration from PG 8.3 and 8.4.
This commit is contained in:
Bruce Momjian
2010-05-12 02:19:11 +00:00
parent 28e1742217
commit c2e9b2f288
22 changed files with 6384 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

85
contrib/pg_upgrade/tablespace.c Normal file
View File

@ -0,0 +1,85 @@
/*
* tablespace.c
*
* tablespace functions
*/
#include "pg_upgrade.h"
static void get_tablespace_paths(migratorContext *ctx);
static void set_tablespace_directory_suffix(migratorContext *ctx,
Cluster whichCluster);
void
init_tablespaces(migratorContext *ctx)
{
get_tablespace_paths(ctx);
set_tablespace_directory_suffix(ctx, CLUSTER_OLD);
set_tablespace_directory_suffix(ctx, CLUSTER_NEW);
if (ctx->num_tablespaces > 0 &&
strcmp(ctx->old.tablespace_suffix, ctx->new.tablespace_suffix) == 0)
pg_log(ctx, PG_FATAL,
"Cannot migrate to/from the same system catalog version when\n"
"using tablespaces.\n");
}
/*
* get_tablespace_paths()
*
* Scans pg_tablespace and returns a malloc'ed array of all tablespace
* paths. Its the caller's responsibility to free the array.
*/
static void
get_tablespace_paths(migratorContext *ctx)
{
PGconn *conn = connectToServer(ctx, "template1", CLUSTER_OLD);
PGresult *res;
int ntups;
int tblnum;
int i_spclocation;
res = executeQueryOrDie(ctx, conn,
"SELECT spclocation "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname != 'pg_default' AND "
" spcname != 'pg_global'");
ctx->num_tablespaces = ntups = PQntuples(res);
ctx->tablespaces = (char **) pg_malloc(ctx, ntups * sizeof(char *));
i_spclocation = PQfnumber(res, "spclocation");
for (tblnum = 0; tblnum < ntups; tblnum++)
ctx->tablespaces[tblnum] = pg_strdup(ctx,
PQgetvalue(res, tblnum, i_spclocation));
PQclear(res);
PQfinish(conn);
return;
}
static void
set_tablespace_directory_suffix(migratorContext *ctx, Cluster whichCluster)
{
ClusterInfo *cluster = (whichCluster == CLUSTER_OLD) ? &ctx->old : &ctx->new;
if (GET_MAJOR_VERSION(cluster->major_version) <= 804)
cluster->tablespace_suffix = pg_strdup(ctx, "");
else
{
/* This cluster has a version-specific subdirectory */
cluster->tablespace_suffix = pg_malloc(ctx, 4 + strlen(cluster->major_version_str) +
10 /* OIDCHARS */ + 1);
/* The leading slash is needed to start a new directory. */
sprintf(cluster->tablespace_suffix, "/PG_%s_%d", cluster->major_version_str,
cluster->controldata.cat_ver);
}
}