Invalidate temp entries for aborted transactions.

diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index be950ee3e534ac56f705cb9120e30561d8169ba6..79b640be070a331f7aa54c177a19a12158fae749 100644 (file)
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.48 1999/09/04 18:42:15 tgl Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.49 1999/09/04 19:55:48 momjian Exp $
  *
  * NOTES
  *     Transaction aborts can now occur two ways:
@@ -151,6 +151,7 @@
 #include "commands/vacuum.h"
 #include "libpq/be-fsstubs.h"
 #include "storage/proc.h"
+#include "utils/temprel.h"
 #include "utils/inval.h"
 #include "utils/portal.h"
 #include "utils/relcache.h"
@@ -1022,6 +1023,7 @@ AbortTransaction()
    RecordTransactionAbort();
    RelationPurgeLocalRelation(false);
    DestroyNoNameRels();
+   invalidate_temp_relations();
    AtEOXact_nbtree();
    AtAbort_Cache();
    AtAbort_Locks();

diff --git a/src/backend/catalog/indexing.c b/src/backend/catalog/indexing.c
index 85a2287435490f2e25fb910ba0a003eee88aff88..f8a115582a5c1d760a3febf370b15e2b01f625d9 100644 (file)
--- a/src/backend/catalog/indexing.c
+++ b/src/backend/catalog/indexing.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/backend/catalog/indexing.c,v 1.42 1999/07/20 17:14:06 momjian Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/catalog/indexing.c,v 1.43 1999/09/04 19:55:49 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -449,13 +449,14 @@ ClassNameIndexScan(Relation heapRelation, char *relName)
    Relation    idesc;
    ScanKeyData skey[1];
    HeapTuple   tuple;
-
+   char        *hold_rel;
+   
    /*
     * we have to do this before looking in system tables because temp
     * table namespace takes precedence
     */
-   if ((tuple = get_temp_rel_by_name(relName)) != NULL)
-       return heap_copytuple(tuple);
+   if ((hold_rel = get_temp_rel_by_name(relName)) != NULL)
+       relName = hold_rel;
 
    ScanKeyEntryInitialize(&skey[0],
                           (bits16) 0x0,

diff --git a/src/backend/utils/cache/temprel.c b/src/backend/utils/cache/temprel.c
index 015737d4b77acfba13943b469e2784a0bf1daaa3..13c78c6934e517011c8c21162b27715bf89acc62 100644 (file)
--- a/src/backend/utils/cache/temprel.c
+++ b/src/backend/utils/cache/temprel.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *   $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/temprel.c,v 1.10 1999/07/17 20:18:02 momjian Exp $
+ *   $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/temprel.c,v 1.11 1999/09/04 19:55:50 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,13 +18,13 @@
  * When a temp table is created, a linked list of temp table tuples is
  * stored here.  When a relname cache lookup is done, references to user-named
  * temp tables are converted to the internal temp table names.
- *
  */
 
 #include 
 
 #include "postgres.h"
 #include "access/heapam.h"
+#include "access/xact.h"
 #include "catalog/heap.h"
 #include "catalog/index.h"
 #include "utils/temprel.h"
@@ -41,7 +41,10 @@ static List *temp_rels = NIL;
 typedef struct TempTable
 {
    char       *user_relname;
-   HeapTuple   pg_class_tuple;
+   char       *relname;
+   Oid         relid;
+   char        relkind;
+   TransactionId xid;
 } TempTable;
 
 
@@ -55,11 +58,15 @@ create_temp_relation(char *relname, HeapTuple pg_class_tuple)
 
    temp_rel = palloc(sizeof(TempTable));
    temp_rel->user_relname = palloc(NAMEDATALEN);
+   temp_rel->relname = palloc(NAMEDATALEN);
 
    /* save user-supplied name */
    strcpy(temp_rel->user_relname, relname);
-
-   temp_rel->pg_class_tuple = heap_copytuple(pg_class_tuple);
+   StrNCpy(temp_rel->relname, ((Form_pg_class)
+       GETSTRUCT(pg_class_tuple))->relname.data, NAMEDATALEN);
+   temp_rel->relid = pg_class_tuple->t_data->t_oid;
+   temp_rel->relkind = ((Form_pg_class) GETSTRUCT(pg_class_tuple))->relkind;
+   temp_rel->xid = GetCurrentTransactionId();
 
    temp_rels = lcons(temp_rel, temp_rels);
 
@@ -79,22 +86,19 @@ remove_all_temp_relations(void)
    while (l != NIL)
    {
        TempTable  *temp_rel = lfirst(l);
-       Form_pg_class classtuple;
-
-       classtuple = (Form_pg_class) GETSTRUCT(temp_rel->pg_class_tuple);
 
        next = lnext(l);        /* do this first, l is deallocated */
 
-       if (classtuple->relkind != RELKIND_INDEX)
+       if (temp_rel->relkind != RELKIND_INDEX)
        {
-           char        relname[NAMEDATALEN];
+           char    relname[NAMEDATALEN];
 
            /* safe from deallocation */
            strcpy(relname, temp_rel->user_relname);
            heap_destroy_with_catalog(relname);
        }
        else
-           index_destroy(temp_rel->pg_class_tuple->t_data->t_oid);
+           index_destroy(temp_rel->relid);
 
        l = next;
    }
@@ -118,10 +122,56 @@ remove_temp_relation(Oid relid)
    {
        TempTable  *temp_rel = lfirst(l);
 
-       if (temp_rel->pg_class_tuple->t_data->t_oid == relid)
+       if (temp_rel->relid == relid)
+       {
+           pfree(temp_rel->user_relname);
+           pfree(temp_rel->relname);
+           pfree(temp_rel);
+           /* remove from linked list */
+           if (prev != NIL)
+           {
+               lnext(prev) = lnext(l);
+               pfree(l);
+               l = lnext(prev);
+           }
+           else
+           {
+               temp_rels = lnext(l);
+               pfree(l);
+               l = temp_rels;
+           }
+       }
+       else
+       {
+           prev = l;
+           l = lnext(l);
+       }
+
+   }
+
+   MemoryContextSwitchTo(oldcxt);
+}
+
+/* remove entries from aborted transactions */
+void
+invalidate_temp_relations(void)
+{
+   MemoryContext oldcxt;
+   List       *l,
+              *prev;
+
+   oldcxt = MemoryContextSwitchTo((MemoryContext) CacheCxt);
+
+   prev = NIL;
+   l = temp_rels;
+   while (l != NIL)
+   {
+       TempTable  *temp_rel = lfirst(l);
+
+       if (temp_rel->xid == GetCurrentTransactionId())
        {
            pfree(temp_rel->user_relname);
-           pfree(temp_rel->pg_class_tuple);
+           pfree(temp_rel->relname);
            pfree(temp_rel);
            /* remove from linked list */
            if (prev != NIL)
@@ -148,7 +198,7 @@ remove_temp_relation(Oid relid)
    MemoryContextSwitchTo(oldcxt);
 }
 
-HeapTuple
+char *
 get_temp_rel_by_name(char *user_relname)
 {
    List       *l;
@@ -158,7 +208,7 @@ get_temp_rel_by_name(char *user_relname)
        TempTable  *temp_rel = lfirst(l);
 
        if (strcmp(temp_rel->user_relname, user_relname) == 0)
-           return temp_rel->pg_class_tuple;
+           return temp_rel->relname;
    }
    return NULL;
 }

diff --git a/src/include/utils/temprel.h b/src/include/utils/temprel.h
index ecfa17985ea17d26508b4d1b58d84008d4f30238..248a6e134e0dbb5cd2e46f22378164541fac2278 100644 (file)
--- a/src/include/utils/temprel.h
+++ b/src/include/utils/temprel.h
@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: temprel.h,v 1.4 1999/07/15 15:21:43 momjian Exp $
+ * $Id: temprel.h,v 1.5 1999/09/04 19:55:50 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -17,7 +17,8 @@
 
 void       create_temp_relation(char *relname, HeapTuple pg_class_tuple);
 void       remove_all_temp_relations(void);
+void       invalidate_temp_relations(void);
 void       remove_temp_relation(Oid relid);
-HeapTuple  get_temp_rel_by_name(char *user_relname);
+char      *get_temp_rel_by_name(char *user_relname);
 
 #endif  /* TEMPREL_H */