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@ -7,7 +7,7 @@ |
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* |
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* |
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* |
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* |
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* IDENTIFICATION |
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* IDENTIFICATION |
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* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.4 1996/11/05 11:57:50 scrappy Exp $ |
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* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.5 1996/11/06 06:47:03 scrappy Exp $ |
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* |
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* |
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* INTERFACE ROUTINES |
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* INTERFACE ROUTINES |
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* heap_creatr() - Create an uncataloged heap relation |
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* heap_creatr() - Create an uncataloged heap relation |
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@ -24,44 +24,49 @@ |
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* |
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* |
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*------------------------------------------------------------------------- |
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*------------------------------------------------------------------------- |
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*/ |
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*/ |
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#include <stdio.h> /* for sprintf() */ |
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#include <postgres.h> |
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#include <sys/file.h> |
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#include <string.h> |
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#include <utils/mcxt.h> |
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#include <parser/catalog_utils.h> |
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#include "postgres.h" |
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#include <catalog/index.h> |
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#include <fmgr.h> |
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#include <catalog/pg_index.h> |
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#include <catalog/pg_type.h> |
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#include <catalog/catname.h> |
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#include <utils/relcache.h> |
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#include <storage/bufmgr.h> |
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#include <catalog/heap.h> |
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#include <rewrite/rewriteRemove.h> |
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#include <storage/lmgr.h> |
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#include <storage/smgr.h> |
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#include <access/relscan.h> |
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#include <utils/tqual.h> |
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/*
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#include <catalog/heap.h> |
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#include <catalog/heap.h> |
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#include <catalog/pg_proc.h> |
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#include <catalog/pg_proc.h> |
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#include <parser/catalog_utils.h> |
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#include "parser/catalog_utils.h" |
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#include <access/heapam.h> |
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#include <access/genam.h> |
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#include "access/heapam.h" |
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#include <access/istrat.h> |
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#include "access/genam.h" |
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#include <storage/bufmgr.h> |
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#include "access/istrat.h" |
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#include <lib/hasht.h> |
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#include "storage/bufmgr.h" |
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#include <miscadmin.h> |
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#include "lib/hasht.h" |
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#include <fmgr.h> |
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#include "miscadmin.h" |
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#include <utils/builtins.h> |
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#include "fmgr.h" |
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#include <utils/mcxt.h> |
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#include "utils/builtins.h" |
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#include <utils/relcache.h> |
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#include "utils/mcxt.h" |
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#include <catalog/catname.h> |
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#include "utils/palloc.h" |
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#include <catalog/pg_index.h> |
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#include "utils/relcache.h" |
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#include <catalog/pg_inherits.h> |
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#include <catalog/pg_ipl.h> |
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#include "catalog/catname.h" |
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#include <catalog/index.h> |
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#include "catalog/pg_attribute.h" |
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#include <catalog/indexing.h> |
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#include "catalog/pg_index.h" |
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#include <catalog/catalog.h> |
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#include "catalog/pg_inherits.h" |
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#include <storage/lmgr.h> |
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#include "catalog/pg_ipl.h" |
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#include <rewrite/rewriteRemove.h> |
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#include "catalog/index.h" |
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#include <storage/smgr.h> |
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#include "catalog/indexing.h" |
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*/ |
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#include "catalog/catalog.h" |
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#include "storage/lmgr.h" |
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#include "rewrite/rewriteRemove.h" |
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#include "storage/smgr.h" |
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static void AddNewAttributeTuples(Oid new_rel_oid, TupleDesc tupdesc); |
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static void AddNewAttributeTuples(Oid new_rel_oid, TupleDesc tupdesc); |
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static void CheckAttributeNames(TupleDesc tupdesc); |
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static void CheckAttributeNames(TupleDesc tupdesc); |
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@ -1174,263 +1179,4 @@ DeletePgTypeTuple(Relation rdesc) |
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/* ----------------
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/* ----------------
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* now scan pg_attribute. if any other relations have |
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* now scan pg_attribute. if any other relations have |
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* attributes of the type of the relation we are deleteing |
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* attributes of the type of the relation we are de |
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* then we have to disallow the deletion. should talk to |
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* stonebraker about this. -cim 6/19/90 |
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* ---------------- |
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*/ |
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typoid = tup->t_oid; |
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pg_attribute_desc = heap_openr(AttributeRelationName); |
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ScanKeyEntryInitialize(&attkey, |
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0, Anum_pg_attribute_atttypid, F_INT4EQ, |
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typoid); |
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pg_attribute_scan = heap_beginscan(pg_attribute_desc, |
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0, |
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NowTimeQual, |
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1, |
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&attkey); |
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/* ----------------
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* try and get a pg_attribute tuple. if we succeed it means |
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* we cant delete the relation because something depends on |
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* the schema. |
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* ---------------- |
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*/ |
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atttup = heap_getnext(pg_attribute_scan, 0, (Buffer *)NULL); |
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if (PointerIsValid(atttup)) { |
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Oid relid = ((AttributeTupleForm) GETSTRUCT(atttup))->attrelid; |
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heap_endscan(pg_type_scan); |
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heap_close(pg_type_desc); |
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heap_endscan(pg_attribute_scan); |
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heap_close(pg_attribute_desc); |
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elog(WARN, "DeletePgTypeTuple: att of type %s exists in relation %d", |
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&rdesc->rd_rel->relname, relid);
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} |
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heap_endscan(pg_attribute_scan); |
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heap_close(pg_attribute_desc); |
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/* ----------------
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* Ok, it's safe so we delete the relation tuple |
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* from pg_type and finish up. But first end the scan so that |
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* we release the read lock on pg_type. -mer 13 Aug 1991 |
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* ---------------- |
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*/ |
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heap_endscan(pg_type_scan); |
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heap_delete(pg_type_desc, &tup->t_ctid); |
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heap_close(pg_type_desc); |
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} |
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/* --------------------------------
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* heap_destroy |
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* |
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* -------------------------------- |
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*/ |
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void |
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heap_destroy(char *relname) |
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{ |
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Relation rdesc; |
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/* ----------------
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* first open the relation. if the relation does exist, |
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* heap_openr() returns NULL. |
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* ---------------- |
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*/ |
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rdesc = heap_openr(relname); |
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if (rdesc == NULL) |
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elog(WARN,"Relation %s Does Not Exist!", relname); |
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/* ----------------
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* prevent deletion of system relations |
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* ---------------- |
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*/ |
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if (IsSystemRelationName(RelationGetRelationName(rdesc)->data)) |
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elog(WARN, "amdestroy: cannot destroy %s relation", |
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&rdesc->rd_rel->relname); |
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/* ----------------
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* remove inheritance information |
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* ---------------- |
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*/ |
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RelationRemoveInheritance(rdesc); |
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/* ----------------
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* remove indexes if necessary |
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* ---------------- |
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*/ |
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if (rdesc->rd_rel->relhasindex) { |
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RelationRemoveIndexes(rdesc); |
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} |
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/* ----------------
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* remove rules if necessary |
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* ---------------- |
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*/ |
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if (rdesc->rd_rules != NULL) { |
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RelationRemoveRules(rdesc->rd_id); |
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} |
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/* ----------------
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* delete attribute tuples |
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* ---------------- |
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*/ |
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DeletePgAttributeTuples(rdesc); |
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/* ----------------
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* delete type tuple. here we want to see the effects |
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* of the deletions we just did, so we use setheapoverride(). |
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* ---------------- |
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*/ |
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setheapoverride(true); |
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DeletePgTypeTuple(rdesc); |
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setheapoverride(false); |
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/* ----------------
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* delete relation tuple |
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* ---------------- |
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*/ |
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DeletePgRelationTuple(rdesc); |
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/* ----------------
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* flush the relation from the relcache |
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* ---------------- |
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*/ |
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RelationIdInvalidateRelationCacheByRelationId(rdesc->rd_id); |
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/* ----------------
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* unlink the relation and finish up. |
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* ---------------- |
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*/ |
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(void) smgrunlink(rdesc->rd_rel->relsmgr, rdesc); |
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if(rdesc->rd_istemp) { |
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rdesc->rd_tmpunlinked = TRUE; |
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} |
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heap_close(rdesc); |
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} |
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/*
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* heap_destroyr |
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* destroy and close temporary relations |
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* |
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*/ |
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void
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heap_destroyr(Relation rdesc) |
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{ |
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ReleaseTmpRelBuffers(rdesc); |
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(void) smgrunlink(rdesc->rd_rel->relsmgr, rdesc); |
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if(rdesc->rd_istemp) { |
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rdesc->rd_tmpunlinked = TRUE; |
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} |
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heap_close(rdesc); |
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RemoveFromTempRelList(rdesc); |
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} |
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/**************************************************************
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functions to deal with the list of temporary relations
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**************************************************************/ |
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/* --------------
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InitTempRellist(): |
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initialize temporary relations list |
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the tempRelList is a list of temporary relations that |
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are created in the course of the transactions |
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they need to be destroyed properly at the end of the transactions |
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MODIFIES the global variable tempRels |
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>> NOTE << |
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malloc is used instead of palloc because we KNOW when we are |
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going to free these things. Keeps us away from the memory context |
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hairyness |
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*/ |
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void |
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InitTempRelList() |
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{ |
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if (tempRels) { |
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free(tempRels->rels); |
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free(tempRels); |
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}; |
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tempRels = (TempRelList*)malloc(sizeof(TempRelList)); |
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tempRels->size = TEMP_REL_LIST_SIZE; |
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tempRels->rels = (Relation*)malloc(sizeof(Relation) * tempRels->size); |
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memset(tempRels->rels, 0, sizeof(Relation) * tempRels->size); |
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tempRels->num = 0; |
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} |
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/*
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removes a relation from the TempRelList |
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MODIFIES the global variable tempRels |
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we don't really remove it, just mark it as NULL |
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and DestroyTempRels will look for NULLs |
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*/ |
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void |
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RemoveFromTempRelList(Relation r) |
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{ |
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int i; |
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if (!tempRels) |
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return; |
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for (i=0; i<tempRels->num; i++) { |
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if (tempRels->rels[i] == r) { |
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tempRels->rels[i] = NULL; |
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break; |
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} |
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} |
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} |
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/*
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add a temporary relation to the TempRelList |
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MODIFIES the global variable tempRels |
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*/ |
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void |
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AddToTempRelList(Relation r) |
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{ |
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if (!tempRels) |
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return; |
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if (tempRels->num == tempRels->size) { |
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tempRels->size += TEMP_REL_LIST_SIZE; |
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tempRels->rels = realloc(tempRels->rels, tempRels->size); |
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} |
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tempRels->rels[tempRels->num] = r; |
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tempRels->num++; |
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} |
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/*
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go through the tempRels list and destroy each of the relations |
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*/ |
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void |
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DestroyTempRels() |
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{ |
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int i; |
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Relation rdesc; |
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if (!tempRels) |
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return; |
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for (i=0;i<tempRels->num;i++) { |
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rdesc = tempRels->rels[i]; |
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|
/* rdesc may be NULL if it has been removed from the list already */ |
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if (rdesc) |
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heap_destroyr(rdesc); |
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} |
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free(tempRels->rels); |
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|
free(tempRels); |
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|
tempRels = NULL; |
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} |
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Marc G. Fournier
29 years ago