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Move common catalog cache access routines to lsyscache.c

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In passing, move pg_relation_is_publishable next to similar functions.

Suggested-by: Alvaro Herrera
Author: Amit Kapila
Reviewed-by: Hou Zhijie
Discussion: https://postgr.es/m/CAHut+PupQ5UW9A9ut0Yjt21J9tHhx958z5L0k8-9hTYf_NYqxA@mail.gmail.com
This commit is contained in:
Amit Kapila
2022-08-02 10:47:22 +05:30
parent c689baa158
commit 6b24d3f9cc
6 changed files with 127 additions and 128 deletions
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101
src/backend/utils/cache/lsyscache.c vendored
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@@ -33,6 +33,7 @@
#include "catalog/pg_proc.h"
#include "catalog/pg_range.h"
#include "catalog/pg_statistic.h"
#include "catalog/pg_subscription.h"
#include "catalog/pg_transform.h"
#include "catalog/pg_type.h"
#include "miscadmin.h"
@@ -3578,3 +3579,103 @@ get_index_isclustered(Oid index_oid)
return isclustered;
}
/*
* get_publication_oid - given a publication name, look up the OID
*
* If missing_ok is false, throw an error if name not found. If true, just
* return InvalidOid.
*/
Oid
get_publication_oid(const char *pubname, bool missing_ok)
{
Oid oid;
oid = GetSysCacheOid1(PUBLICATIONNAME, Anum_pg_publication_oid,
CStringGetDatum(pubname));
if (!OidIsValid(oid) && !missing_ok)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("publication \"%s\" does not exist", pubname)));
return oid;
}
/*
* get_publication_name - given a publication Oid, look up the name
*
* If missing_ok is false, throw an error if name not found. If true, just
* return NULL.
*/
char *
get_publication_name(Oid pubid, bool missing_ok)
{
HeapTuple tup;
char *pubname;
Form_pg_publication pubform;
tup = SearchSysCache1(PUBLICATIONOID, ObjectIdGetDatum(pubid));
if (!HeapTupleIsValid(tup))
{
if (!missing_ok)
elog(ERROR, "cache lookup failed for publication %u", pubid);
return NULL;
}
pubform = (Form_pg_publication) GETSTRUCT(tup);
pubname = pstrdup(NameStr(pubform->pubname));
ReleaseSysCache(tup);
return pubname;
}
/*
* get_subscription_oid - given a subscription name, look up the OID
*
* If missing_ok is false, throw an error if name not found. If true, just
* return InvalidOid.
*/
Oid
get_subscription_oid(const char* subname, bool missing_ok)
{
Oid oid;
oid = GetSysCacheOid2(SUBSCRIPTIONNAME, Anum_pg_subscription_oid,
MyDatabaseId, CStringGetDatum(subname));
if (!OidIsValid(oid) && !missing_ok)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("subscription \"%s\" does not exist", subname)));
return oid;
}
/*
* get_subscription_name - given a subscription OID, look up the name
*
* If missing_ok is false, throw an error if name not found. If true, just
* return NULL.
*/
char *
get_subscription_name(Oid subid, bool missing_ok)
{
HeapTuple tup;
char* subname;
Form_pg_subscription subform;
tup = SearchSysCache1(SUBSCRIPTIONOID, ObjectIdGetDatum(subid));
if (!HeapTupleIsValid(tup))
{
if (!missing_ok)
elog(ERROR, "cache lookup failed for subscription %u", subid);
return NULL;
}
subform = (Form_pg_subscription) GETSTRUCT(tup);
subname = pstrdup(NameStr(subform->subname));
ReleaseSysCache(tup);
return subname;
}