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@ -8,12 +8,13 @@ |
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* |
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* |
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* IDENTIFICATION |
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* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.51 2002/11/02 22:02:08 tgl Exp $ |
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* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.52 2002/11/09 23:56:39 momjian Exp $ |
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* |
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*------------------------------------------------------------------------- |
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*/ |
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#include "postgres.h" |
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#include "access/xact.h" |
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#include "access/genam.h" |
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#include "access/tuptoaster.h" |
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#include "catalog/catalog.h" |
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@ -48,9 +49,10 @@ |
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#include "utils/builtins.h" |
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#include "utils/fmgroids.h" |
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#include "utils/lsyscache.h" |
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#include "utils/syscache.h" |
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#include "utils/relcache.h" |
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#include "utils/syscache.h" |
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static List *temprels = NIL; |
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static List *MergeAttributes(List *schema, List *supers, bool istemp, |
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List **supOids, List **supconstr, bool *supHasOids); |
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@ -116,6 +118,7 @@ DefineRelation(CreateStmt *stmt, char relkind) |
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int i; |
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AttrNumber attnum; |
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/*
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* Truncate relname to appropriate length (probably a waste of time, |
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* as parser should have done this already). |
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@ -222,6 +225,7 @@ DefineRelation(CreateStmt *stmt, char relkind) |
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descriptor, |
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relkind, |
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false, |
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stmt->ateoxact, |
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allowSystemTableMods); |
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StoreCatalogInheritance(relationId, inheritOids); |
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@ -3783,11 +3787,18 @@ AlterTableCreateToastTable(Oid relOid, bool silent) |
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* when its master is, so there's no need to handle the toast rel as |
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* temp. |
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*/ |
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/*
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* Pass ATEOXACTNOOP for ateoxact since we want heap_drop_with_catalog() |
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* to remove TOAST tables for temp tables, not AtEOXact_temp_relations() |
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*/ |
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toast_relid = heap_create_with_catalog(toast_relname, |
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PG_TOAST_NAMESPACE, |
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tupdesc, |
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RELKIND_TOASTVALUE, |
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shared_relation, |
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ATEOXACTNOOP, |
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true); |
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/* make the toast relation visible, else index creation will fail */ |
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@ -3922,3 +3933,206 @@ needs_toast_table(Relation rel) |
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MAXALIGN(data_length); |
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return (tuple_length > TOAST_TUPLE_THRESHOLD); |
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} |
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/*
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* To handle ON COMMIT { DROP | PRESERVE ROWS | DELETE ROWS } |
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*/ |
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void |
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AtEOXact_temp_relations(bool iscommit, int bstate) |
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{ |
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List *l, |
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*prev; |
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MemoryContext oldctx; |
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if (temprels == NIL) |
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return; |
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/*
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* These loops are tricky because we are removing items from the List |
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* while we are traversing it. |
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*/ |
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/* Remove 'dead' entries on commit and clear 'dead' status on abort */ |
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l = temprels; |
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prev = NIL; |
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while (l != NIL) |
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{ |
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TempTable *t = lfirst(l); |
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if (t->dead) |
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{ |
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if (iscommit) |
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{ |
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/* Remove from temprels, since the user has DROP'd */ |
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oldctx = MemoryContextSwitchTo(CacheMemoryContext); |
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if (prev == NIL) |
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{ |
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pfree(t); |
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temprels = lnext(l); |
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pfree(l); |
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l = temprels; |
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} |
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else |
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{ |
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pfree(t); |
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lnext(prev) = lnext(l); |
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pfree(l); |
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l = lnext(prev); |
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} |
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MemoryContextSwitchTo(oldctx); |
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continue; |
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} |
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else |
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/* user dropped but now we're aborted */ |
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t->dead = false; |
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} |
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prev = l; |
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l = lnext(l); |
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} |
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if ((iscommit && bstate != TBLOCK_END) || |
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(!iscommit && bstate != TBLOCK_ABORT)) |
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return; |
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/* Perform per-xact actions */ |
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l = temprels; |
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prev = NIL; |
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if (iscommit) |
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{ |
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while (l != NIL) |
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{ |
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TempTable *t = lfirst(l); |
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if (t->ateoxact == ATEOXACTDROP) |
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{ |
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ObjectAddress object; |
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object.classId = RelOid_pg_class; |
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object.objectId = t->relid; |
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object.objectSubId = 0; |
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performDeletion(&object, DROP_CASCADE); |
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oldctx = MemoryContextSwitchTo(CacheMemoryContext); |
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if (prev == NIL) |
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{ |
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pfree(t); |
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temprels = lnext(l); |
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pfree(l); |
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l = temprels; |
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} |
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else |
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{ |
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pfree(t); |
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lnext(prev) = lnext(l); |
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pfree(l); |
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l = lnext(prev); |
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} |
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MemoryContextSwitchTo(oldctx); |
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CommandCounterIncrement(); |
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continue; |
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} |
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else if (t->ateoxact == ATEOXACTDELETE) |
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{ |
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heap_truncate(t->relid); |
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CommandCounterIncrement(); |
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} |
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prev = l; |
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l = lnext(l); |
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} |
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} |
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else |
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{ |
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/* Abort --- remove entries added by this xact */ |
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TransactionId curtid = GetCurrentTransactionId(); |
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oldctx = MemoryContextSwitchTo(CacheMemoryContext); |
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while (l != NIL) |
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{ |
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TempTable *t = lfirst(l); |
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if (t->tid == curtid) |
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{ |
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if (prev == NIL) |
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{ |
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pfree(t); |
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temprels = lnext(l); |
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pfree(l); |
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l = temprels; |
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} |
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else |
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{ |
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pfree(t); |
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lnext(prev) = lnext(l); |
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pfree(l); |
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l = lnext(prev); |
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} |
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continue; |
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} |
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prev = l; |
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l = lnext(l); |
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} |
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MemoryContextSwitchTo(oldctx); |
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} |
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} |
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/*
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* Register a temp rel in temprels |
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*/ |
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void |
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reg_temp_rel(TempTable * t) |
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{ |
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temprels = lcons(t, temprels); |
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} |
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/*
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* return the ON COMMIT/ateoxact value for a given temp rel |
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*/ |
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void |
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free_temp_rels(void) |
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{ |
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MemoryContext oldctx; |
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oldctx = MemoryContextSwitchTo(CacheMemoryContext); |
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while (temprels != NIL) |
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{ |
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List *l = temprels; |
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temprels = lnext(temprels); |
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pfree(lfirst(l)); |
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pfree(l); |
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} |
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MemoryContextSwitchTo(oldctx); |
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} |
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/*
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* Remove (actually just mark for deletion, in case we abort) |
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* Relid from the temprels list |
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*/ |
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void |
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rm_temp_rel(Oid relid) |
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{ |
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List *l; |
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foreach(l, temprels) |
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{ |
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TempTable *t = lfirst(l); |
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if (t->relid == relid) |
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{ |
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t->dead = true; |
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return; |
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} |
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} |
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/* If we get here, we're in trouble */ |
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Assert(1==1); |
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} |
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Bruce Momjian
23 years ago