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First phase of memory management rewrite (see backend/utils/mmgr/README

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for details).  It doesn't really do that much yet, since there are no
short-term memory contexts in the executor, but the infrastructure is
in place and long-term contexts are handled reasonably.  A few long-
standing bugs have been fixed, such as 'VACUUM; anything' in a single
query string crashing.  Also, out-of-memory is now considered a
recoverable ERROR, not FATAL.
Eliminate a large amount of crufty, now-dead code in and around
memory management.
Fix problem with holding off SIGTRAP, SIGSEGV, etc in postmaster and
backend startup.
This commit is contained in:
Tom Lane
2000-06-28 03:33:33 +00:00
parent b601c8d882
commit 1aebc3618a
74 changed files with 2325 additions and 3296 deletions
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113
src/backend/rewrite/rewriteDefine.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.46 2000/06/15 04:09:58 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.47 2000/06/28 03:31:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -16,51 +16,20 @@
#include "postgres.h"
#include "access/heapam.h"
#include "lib/stringinfo.h"
#include "utils/builtins.h"
#include "catalog/catname.h"
#include "catalog/indexing.h"
#include "catalog/pg_rewrite.h"
#include "parser/parse_relation.h"
#include "rewrite/rewriteDefine.h"
#include "rewrite/rewriteSupport.h"
#include "tcop/tcopprot.h"
Oid LastOidProcessed = InvalidOid;
/*
* Convert given string to a suitably quoted string constant,
* and append it to the StringInfo buffer.
* XXX Any MULTIBYTE considerations here?
*/
static void
quoteString(StringInfo buf, char *source)
{
char *current;
appendStringInfoChar(buf, '\'');
for (current = source; *current; current++)
{
char ch = *current;
if (ch == '\'' || ch == '\\')
{
appendStringInfoChar(buf, '\\');
appendStringInfoChar(buf, ch);
}
else if (ch >= 0 && ch < ' ')
appendStringInfo(buf, "\\%03o", (int) ch);
else
appendStringInfoChar(buf, ch);
}
appendStringInfoChar(buf, '\'');
}
/*
* InsertRule -
* takes the arguments and inserts them as attributes into the system
* relation "pg_rewrite"
*
* MODS : changes the value of LastOidProcessed as a side
* effect of inserting the rule tuple
*
* ARGS : rulname - name of the rule
* evtype - one of RETRIEVE,REPLACE,DELETE,APPEND
* evobj - name of relation
@ -78,11 +47,17 @@ InsertRule(char *rulname,
bool evinstead,
char *actiontree)
{
StringInfoData rulebuf;
Relation eventrel;
Oid eventrel_oid;
AttrNumber evslot_index;
char *is_instead = "f";
int i;
Datum values[Natts_pg_rewrite];
char nulls[Natts_pg_rewrite];
NameData rname;
Relation pg_rewrite_desc;
TupleDesc tupDesc;
HeapTuple tup;
Oid rewriteObjectId;
eventrel = heap_openr(evobj, AccessShareLock);
eventrel_oid = RelationGetRelid(eventrel);
@ -96,9 +71,6 @@ InsertRule(char *rulname,
evslot_index = attnameAttNum(eventrel, evslot);
heap_close(eventrel, AccessShareLock);
if (evinstead)
is_instead = "t";
if (evqual == NULL)
evqual = "<>";
@ -106,23 +78,54 @@ InsertRule(char *rulname,
elog(ERROR, "Attempt to insert rule '%s' failed: already exists",
rulname);
initStringInfo(&rulebuf);
appendStringInfo(&rulebuf,
"INSERT INTO pg_rewrite (rulename, ev_type, ev_class, ev_attr, ev_action, ev_qual, is_instead) VALUES (");
quoteString(&rulebuf, rulname);
appendStringInfo(&rulebuf, ", %d::char, %u::oid, %d::int2, ",
evtype, eventrel_oid, evslot_index);
quoteString(&rulebuf, actiontree);
appendStringInfo(&rulebuf, "::text, ");
quoteString(&rulebuf, evqual);
appendStringInfo(&rulebuf, "::text, '%s'::bool);",
is_instead);
/* ----------------
* Set up *nulls and *values arrays
* ----------------
*/
MemSet(nulls, ' ', sizeof(nulls));
pg_exec_query_dest(rulebuf.data, None, true);
i = 0;
namestrcpy(&rname, rulname);
values[i++] = NameGetDatum(&rname);
values[i++] = CharGetDatum(evtype + '0');
values[i++] = ObjectIdGetDatum(eventrel_oid);
values[i++] = Int16GetDatum(evslot_index);
values[i++] = BoolGetDatum(evinstead);
values[i++] = PointerGetDatum(lztextin(evqual));
values[i++] = PointerGetDatum(lztextin(actiontree));
pfree(rulebuf.data);
/* ----------------
* create a new pg_rewrite tuple
* ----------------
*/
pg_rewrite_desc = heap_openr(RewriteRelationName, RowExclusiveLock);
return LastOidProcessed;
tupDesc = pg_rewrite_desc->rd_att;
tup = heap_formtuple(tupDesc,
values,
nulls);
heap_insert(pg_rewrite_desc, tup);
rewriteObjectId = tup->t_data->t_oid;
if (RelationGetForm(pg_rewrite_desc)->relhasindex)
{
Relation idescs[Num_pg_rewrite_indices];
CatalogOpenIndices(Num_pg_rewrite_indices, Name_pg_rewrite_indices,
idescs);
CatalogIndexInsert(idescs, Num_pg_rewrite_indices, pg_rewrite_desc,
tup);
CatalogCloseIndices(Num_pg_rewrite_indices, idescs);
}
heap_freetuple(tup);
heap_close(pg_rewrite_desc, RowExclusiveLock);
return rewriteObjectId;
}
/*