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Fetch information about DEFAULT/CHECK while openning a relation.
This commit is contained in:
Vadim B. Mikheev
157
src/backend/utils/cache/relcache.c
vendored
157
src/backend/utils/cache/relcache.c
vendored
@@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.18 1997/08/21 04:09:51 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.19 1997/08/22 03:35:44 vadim Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@@ -82,6 +82,7 @@
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#include "catalog/pg_log.h"
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#include "catalog/pg_time.h"
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#include "catalog/pg_attrdef.h"
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#include "catalog/pg_relcheck.h"
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#include "catalog/indexing.h"
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#include "catalog/index.h"
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#include "fmgr.h"
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@@ -260,6 +261,7 @@ static void build_tupdesc_ind(RelationBuildDescInfo buildinfo,
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static Relation RelationBuildDesc(RelationBuildDescInfo buildinfo);
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static void IndexedAccessMethodInitialize(Relation relation);
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static void AttrDefaultFetch (Relation relation);
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static void RelCheckFetch (Relation relation);
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/*
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* newlyCreatedRelns -
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@@ -482,7 +484,7 @@ AllocateRelationDesc(u_int natts, Form_pg_class relp)
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* RelationBuildTupleDesc
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*
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* Form the relation's tuple descriptor from information in
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* the pg_attribute system catalog.
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* the pg_attribute, pg_attrdef & pg_relcheck system cataloges.
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* --------------------------------
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*/
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static void
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@@ -499,13 +501,7 @@ RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
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if (IsBootstrapProcessingMode())
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build_tupdesc_seq(buildinfo, relation, natts);
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else
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{
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relation->rd_att->constr = (TupleConstr *) palloc(sizeof(TupleConstr));
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relation->rd_att->constr->num_check = 0;
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relation->rd_att->constr->num_defval = 0;
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relation->rd_att->constr->has_not_null = false;
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build_tupdesc_ind(buildinfo, relation, natts);
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}
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}
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static void
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@@ -580,10 +576,13 @@ build_tupdesc_ind(RelationBuildDescInfo buildinfo,
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Relation attrel;
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HeapTuple atttup;
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AttributeTupleForm attp;
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TupleConstr *constr = (TupleConstr *) palloc(sizeof(TupleConstr));
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AttrDefault *attrdef = NULL;
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int ndef = 0;
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int i;
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constr->has_not_null = false;
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attrel = heap_openr(AttributeRelationName);
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for (i = 1; i <= relation->rd_rel->relnatts; i++) {
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@@ -604,7 +603,7 @@ build_tupdesc_ind(RelationBuildDescInfo buildinfo,
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/* Update if this attribute have a constraint */
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if (attp->attnotnull)
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relation->rd_att->constr->has_not_null = true;
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constr->has_not_null = true;
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if (attp->atthasdef)
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{
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@@ -619,16 +618,39 @@ build_tupdesc_ind(RelationBuildDescInfo buildinfo,
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}
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heap_close(attrel);
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if ( ndef > 0 )
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if ( constr->has_not_null || ndef > 0 || relation->rd_rel->relchecks )
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{
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if ( ndef > relation->rd_rel->relnatts )
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relation->rd_att->constr->defval = (AttrDefault*)
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relation->rd_att->constr = constr;
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if ( ndef > 0 ) /* DEFAULTs */
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{
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if ( ndef < relation->rd_rel->relnatts )
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constr->defval = (AttrDefault*)
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repalloc (attrdef, ndef * sizeof (AttrDefault));
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else
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constr->defval = attrdef;
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constr->num_defval = ndef;
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AttrDefaultFetch (relation);
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}
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else
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relation->rd_att->constr->defval = attrdef;
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relation->rd_att->constr->num_defval = ndef;
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AttrDefaultFetch (relation);
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constr->num_defval = 0;
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if ( relation->rd_rel->relchecks > 0 ) /* CHECKs */
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{
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constr->num_check = relation->rd_rel->relchecks;
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constr->check = (ConstrCheck *) palloc (constr->num_check *
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sizeof (ConstrCheck));
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memset (constr->check, 0, constr->num_check * sizeof (ConstrCheck));
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RelCheckFetch (relation);
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}
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else
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constr->num_check = 0;
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}
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else
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{
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pfree (constr);
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relation->rd_att->constr = NULL;
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}
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}
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@@ -1252,8 +1274,6 @@ static void
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RelationFlushRelation(Relation *relationPtr,
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bool onlyFlushReferenceCountZero)
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{
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int i;
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AttributeTupleForm *p;
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MemoryContext oldcxt;
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Relation relation = *relationPtr;
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@@ -1268,14 +1288,8 @@ RelationFlushRelation(Relation *relationPtr,
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oldcxt = MemoryContextSwitchTo((MemoryContext)CacheCxt);
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RelationCacheDelete(relation);
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p = relation->rd_att->attrs;
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for (i = 0; i < relation->rd_rel->relnatts; i++, p++)
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pfree (*p);
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pfree (relation->rd_att->attrs);
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if (relation->rd_att->constr)
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pfree (relation->rd_att->constr);
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pfree (relation->rd_att);
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FreeTupleDesc (relation->rd_att);
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#if 0
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if (relation->rd_rules) {
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@@ -1641,8 +1655,9 @@ AttrDefaultFetch (Relation relation)
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pfree(indexRes);
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if (!HeapTupleIsValid(tuple))
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continue;
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found++;
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adform = (Form_pg_attrdef) GETSTRUCT(tuple);
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for (i = 1; i <= ndef; i++)
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for (i = 0; i < ndef; i++)
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{
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if ( adform->adnum != attrdef[i].adnum )
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continue;
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@@ -1667,10 +1682,10 @@ AttrDefaultFetch (Relation relation)
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NAMEDATALEN, relation->rd_att->attrs[adform->adnum - 1]->attname.data,
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NAMEDATALEN, relation->rd_rel->relname.data);
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attrdef[i].adsrc = textout (val);
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found++;
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break;
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}
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if ( i > ndef )
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if ( i >= ndef )
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elog (WARN, "AttrDefaultFetch: unexpected record found for attr %d in rel %.*s",
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adform->adnum,
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NAMEDATALEN, relation->rd_rel->relname.data);
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@@ -1689,6 +1704,88 @@ AttrDefaultFetch (Relation relation)
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}
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static void
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RelCheckFetch (Relation relation)
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{
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ConstrCheck *check = relation->rd_att->constr->check;
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int ncheck = relation->rd_att->constr->num_check;
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Relation rcrel;
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Relation irel;
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ScanKeyData skey;
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HeapTuple tuple;
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IndexScanDesc sd;
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RetrieveIndexResult indexRes;
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Buffer buffer;
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ItemPointer iptr;
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Name rcname;
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struct varlena *val;
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bool isnull;
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int found;
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ScanKeyEntryInitialize(&skey,
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(bits16)0x0,
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(AttrNumber)1,
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(RegProcedure)ObjectIdEqualRegProcedure,
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ObjectIdGetDatum(relation->rd_id));
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rcrel = heap_openr(RelCheckRelationName);
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irel = index_openr(RelCheckIndex);
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sd = index_beginscan(irel, false, 1, &skey);
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tuple = (HeapTuple)NULL;
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for (found = 0; ; )
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{
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indexRes = index_getnext(sd, ForwardScanDirection);
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if (!indexRes)
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break;
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iptr = &indexRes->heap_iptr;
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tuple = heap_fetch(rcrel, NowTimeQual, iptr, &buffer);
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pfree(indexRes);
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if (!HeapTupleIsValid(tuple))
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continue;
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if ( found == ncheck )
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elog (WARN, "RelCheckFetch: unexpected record found for rel %.*s",
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NAMEDATALEN, relation->rd_rel->relname.data);
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rcname = (Name) fastgetattr (tuple,
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Anum_pg_relcheck_rcname,
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rcrel->rd_att, &isnull);
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if ( isnull )
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elog (WARN, "RelCheckFetch: rcname IS NULL for rel %.*s",
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NAMEDATALEN, relation->rd_rel->relname.data);
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check[found].ccname = nameout (rcname);
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val = (struct varlena*) fastgetattr (tuple,
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Anum_pg_relcheck_rcbin,
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rcrel->rd_att, &isnull);
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if ( isnull )
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elog (WARN, "RelCheckFetch: rcbin IS NULL for rel %.*s",
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NAMEDATALEN, relation->rd_rel->relname.data);
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check[found].ccbin = textout (val);
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val = (struct varlena*) fastgetattr (tuple,
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Anum_pg_relcheck_rcsrc,
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rcrel->rd_att, &isnull);
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if ( isnull )
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elog (WARN, "RelCheckFetch: rcsrc IS NULL for rel %.*s",
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NAMEDATALEN, relation->rd_rel->relname.data);
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check[found].ccsrc = textout (val);
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found++;
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ReleaseBuffer(buffer);
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}
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if ( found < ncheck )
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elog (WARN, "RelCheckFetch: %d record not found for rel %.*s",
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ncheck - found,
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NAMEDATALEN, relation->rd_rel->relname.data);
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index_endscan (sd);
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pfree (sd);
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index_close (irel);
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heap_close (rcrel);
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}
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/*
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* init_irels(), write_irels() -- handle special-case initialization of
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* index relation descriptors.
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