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Choose schema name visibility from running server version

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Guarantee the extension compiled on newer servers can be used on older
ones.
This commit is contained in:
Daniele Varrazzo 2018-03-19 19:39:37 +00:00
parent 07e944d9d1
commit c62d865c18
1 changed files with 36 additions and 19 deletions
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55
lib/repack.c
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@ -35,6 +35,7 @@
#include "storage/lmgr.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/relcache.h"
@ -353,31 +354,47 @@ get_relation_name(Oid relid)
{
Oid nsp = get_rel_namespace(relid);
char *nspname;
char *strver;
int ver;
/* Get the version of the running server (PG_VERSION_NUM would return
* the version we compiled the extension with) */
strver = GetConfigOptionByName("server_version_num", NULL
#if PG_VERSION_NUM >= 90600
, false /* missing_ok */
#endif
);
ver = atoi(strver);
pfree(strver);
/*
* Relation names given by PostgreSQL core are always
* qualified since some minor releases. Note that this change
* doesn't introduce to PostgreSQL 9.2 and 9.1 releases.
* wasn't introduced in PostgreSQL 9.2 and 9.1 releases.
*/
#if ((PG_VERSION_NUM >= 100000 && PG_VERSION_NUM < 100003) || \
(PG_VERSION_NUM >= 90600 && PG_VERSION_NUM < 90608) || \
(PG_VERSION_NUM >= 90500 && PG_VERSION_NUM < 90512) || \
(PG_VERSION_NUM >= 90400 && PG_VERSION_NUM < 90417) || \
(PG_VERSION_NUM >= 90300 && PG_VERSION_NUM < 90322) || \
(PG_VERSION_NUM >= 90200 && PG_VERSION_NUM < 90300) || \
(PG_VERSION_NUM >= 90100 && PG_VERSION_NUM < 90200))
/* Qualify the name if not visible in search path */
if (RelationIsVisible(relid))
nspname = NULL;
if ((ver >= 100000 && ver < 100003) ||
(ver >= 90600 && ver < 90608) ||
(ver >= 90500 && ver < 90512) ||
(ver >= 90400 && ver < 90417) ||
(ver >= 90300 && ver < 90322) ||
(ver >= 90200 && ver < 90300) ||
(ver >= 90100 && ver < 90200))
{
/* Qualify the name if not visible in search path */
if (RelationIsVisible(relid))
nspname = NULL;
else
nspname = get_namespace_name(nsp);
}
else
nspname = get_namespace_name(nsp);
#else
/* Qualify the name */
if (OidIsValid(nsp))
nspname = get_namespace_name(nsp);
else
nspname = NULL;
#endif
{
/* Always qualify the name */
if (OidIsValid(nsp))
nspname = get_namespace_name(nsp);
else
nspname = NULL;
}
return quote_qualified_identifier(nspname, get_rel_name(relid));
}