/*
* Copyright (c) 2009 Teodor Sigaev <teodor@sigaev.ru>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of any co-contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <postgres.h>
#include <fmgr.h>
+#include <miscadmin.h>
+#include <access/heapam.h>
+#include <access/xact.h>
#include <catalog/namespace.h>
#include <catalog/pg_class.h>
#include <nodes/pg_list.h>
#include <optimizer/plancat.h>
+#include <storage/bufmgr.h>
#include <utils/builtins.h>
#include <utils/guc.h>
#include <utils/lsyscache.h>
+#include <utils/rel.h>
+#if PG_VERSION_NUM >= 100000
+#include <utils/regproc.h>
+#include <utils/varlena.h>
+#endif
PG_MODULE_MAGIC;
-static int nIndexesOut = 0;
-static Oid *indexesOut = NULL;
+static int nDisabledIndexes = 0;
+static Oid *disabledIndexes = NULL;
+static char *disableIndexesOutStr = "";
+
+static int nEnabledIndexes = 0;
+static Oid *enabledIndexes = NULL;
+static char *enableIndexesOutStr = "";
+
get_relation_info_hook_type prevHook = NULL;
+static bool fix_empty_table = false;
-static char *indexesOutStr = "";
+static bool plantuner_enable_inited = false;
+static bool plantuner_disable_inited = false;
static const char *
-indexesOutAssign(const char * newval, bool doit, GucSource source)
+indexesAssign(const char * newval, bool doit, GucSource source, bool isDisable)
{
- char *rawname;
- List *namelist;
- ListCell *l;
+ char *rawname;
+ List *namelist;
+ ListCell *l;
Oid *newOids = NULL;
int nOids = 0,
i = 0;
if (!SplitIdentifierString(rawname, ',', &namelist))
goto cleanup;
- if (doit)
+ /*
+ * follow work could be done only in normal processing because of
+ * accsess to system catalog
+ */
+ if (MyBackendId == InvalidBackendId || !IsUnderPostmaster ||
+ !IsTransactionState())
+ {
+ /* reset init state */
+ if (isDisable)
+ plantuner_disable_inited = false;
+ else
+ plantuner_enable_inited = false;
+
+ return newval;
+ }
+
+ if (doit)
{
nOids = list_length(namelist);
newOids = malloc(sizeof(Oid) * (nOids+1));
if (!newOids)
- elog(ERROR,"could not allocate %d bytes", sizeof(Oid) * (nOids+1));
+ elog(ERROR,"could not allocate %d bytes",
+ (int)(sizeof(Oid) * (nOids+1)));
}
+ if (isDisable)
+ plantuner_disable_inited = true;
+ else
+ plantuner_enable_inited = true;
+
foreach(l, namelist)
{
- char *curname = (char *) lfirst(l);
- Oid indexOid = RangeVarGetRelid(makeRangeVarFromNameList(stringToQualifiedNameList(curname)), true);
+ char *curname = (char *) lfirst(l);
+#if PG_VERSION_NUM >= 90200
+ Oid indexOid = RangeVarGetRelid(
+ makeRangeVarFromNameList(stringToQualifiedNameList(curname)),
+ NoLock, true);
+#else
+ Oid indexOid = RangeVarGetRelid(
+ makeRangeVarFromNameList(stringToQualifiedNameList(curname)),
+ true);
+#endif
if (indexOid == InvalidOid)
{
- elog(WARNING,"'%s' does not exist", curname);
+#if PG_VERSION_NUM >= 90100
+ if (doit == false)
+#endif
+ elog(WARNING,"'%s' does not exist", curname);
continue;
}
else if ( get_rel_relkind(indexOid) != RELKIND_INDEX )
{
- elog(WARNING,"'%s' is not an index", curname);
+#if PG_VERSION_NUM >= 90100
+ if (doit == false)
+#endif
+ elog(WARNING,"'%s' is not an index", curname);
continue;
}
else if (doit)
}
}
- if (doit)
+ if (doit)
{
- nIndexesOut = nOids;
- indexesOut = newOids;
+ if (isDisable)
+ {
+ nDisabledIndexes = i;
+ if (disabledIndexes)
+ free(disabledIndexes);
+ disabledIndexes = newOids;
+ }
+ else
+ {
+ nEnabledIndexes = i;
+ if (enabledIndexes)
+ free(enabledIndexes);
+ enabledIndexes = newOids;
+ }
}
pfree(rawname);
return NULL;
}
+static const char *
+assignDisabledIndexes(const char * newval, bool doit, GucSource source)
+{
+ return indexesAssign(newval, doit, source, true);
+}
+
+static const char *
+assignEnabledIndexes(const char * newval, bool doit, GucSource source)
+{
+ return indexesAssign(newval, doit, source, false);
+}
+
+static void
+lateInit()
+{
+ if (!plantuner_enable_inited)
+ indexesAssign(enableIndexesOutStr, true, PGC_S_USER, false);
+ if (!plantuner_disable_inited)
+ indexesAssign(disableIndexesOutStr, true, PGC_S_USER, true);
+}
+
+#if PG_VERSION_NUM >= 90100
+
+static bool
+checkDisabledIndexes(char **newval, void **extra, GucSource source)
+{
+ char *val;
+
+ val = (char*)indexesAssign(*newval, false, source, true);
+
+ if (val)
+ {
+ *newval = val;
+ return true;
+ }
+
+ return false;
+}
+
+static bool
+checkEnabledIndexes(char **newval, void **extra, GucSource source)
+{
+ char *val;
+
+ val = (char*)indexesAssign(*newval, false, source, false);
+
+ if (val)
+ {
+ *newval = val;
+ return true;
+ }
+
+ return false;
+}
static void
-indexFilter(PlannerInfo *root, Oid relationObjectId, bool inhparent, RelOptInfo *rel) {
+assignDisabledIndexesNew(const char *newval, void *extra)
+{
+ assignDisabledIndexes(newval, true, PGC_S_USER /* doesn't matter */);
+}
+
+static void
+assignEnabledIndexesNew(const char *newval, void *extra)
+{
+ assignEnabledIndexes(newval, true, PGC_S_USER /* doesn't matter */);
+}
+
+#endif
+
+static void
+indexFilter(PlannerInfo *root, Oid relationObjectId, bool inhparent,
+ RelOptInfo *rel)
+{
int i;
- for(i=0;i<nIndexesOut;i++)
+ lateInit();
+
+ for(i=0;i<nDisabledIndexes;i++)
{
ListCell *l;
{
IndexOptInfo *info = (IndexOptInfo*)lfirst(l);
- if (indexesOut[i] == info->indexoid)
+ if (disabledIndexes[i] == info->indexoid)
{
- rel->indexlist = list_delete_ptr(rel->indexlist, info);
+ int j;
+
+ for(j=0; j<nEnabledIndexes; j++)
+ if (enabledIndexes[j] == info->indexoid)
+ break;
+
+ if (j >= nEnabledIndexes)
+ rel->indexlist = list_delete_ptr(rel->indexlist, info);
+
break;
}
}
}
+}
+
+static void
+execPlantuner(PlannerInfo *root, Oid relationObjectId, bool inhparent,
+ RelOptInfo *rel)
+{
+ Relation relation;
+
+ relation = heap_open(relationObjectId, NoLock);
+ if (relation->rd_rel->relkind == RELKIND_RELATION)
+ {
+ if (fix_empty_table && RelationGetNumberOfBlocks(relation) == 0)
+ {
+ /*
+ * estimate_rel_size() could be too pessimistic for particular
+ * workload
+ */
+ rel->pages = 0.0;
+ rel->tuples = 0.0;
+ }
+
+ indexFilter(root, relationObjectId, inhparent, rel);
+ }
+ heap_close(relation, NoLock);
/*
- * Call next hook if it exists
+ * Call next hook if it exists
*/
if (prevHook)
prevHook(root, relationObjectId, inhparent, rel);
}
static const char*
-IndexFilterShow(void)
+IndexFilterShow(Oid* indexes, int nIndexes)
{
- char *val, *ptr;
- int i,
+ char *val, *ptr;
+ int i,
len;
- len = 1 /* \0 */ + nIndexesOut * (2 * NAMEDATALEN + 2 /* ', ' */ + 1 /* . */);
+ lateInit();
+
+ len = 1 /* \0 */ + nIndexes * (2 * NAMEDATALEN + 2 /* ', ' */ + 1 /* . */);
ptr = val = palloc(len);
- *ptr ='\0';
- for(i=0; i<nIndexesOut; i++)
+ *ptr =(char)'\0';
+ for(i=0; i<nIndexes; i++)
{
- char *relname = get_rel_name(indexesOut[i]);
- Oid nspOid = get_rel_namespace(indexesOut[i]);
- char *nspname = get_namespace_name(nspOid);
+ char *relname = get_rel_name(indexes[i]);
+ Oid nspOid = get_rel_namespace(indexes[i]);
+ char *nspname = get_namespace_name(nspOid);
if ( relname == NULL || nspOid == InvalidOid || nspname == NULL )
continue;
return val;
}
+static const char*
+disabledIndexFilterShow(void)
+{
+ return IndexFilterShow(disabledIndexes, nDisabledIndexes);
+}
+
+static const char*
+enabledIndexFilterShow(void)
+{
+ return IndexFilterShow(enabledIndexes, nEnabledIndexes);
+}
+
void _PG_init(void);
void
-_PG_init(void)
+_PG_init(void)
{
- DefineCustomStringVariable(
+ DefineCustomStringVariable(
"plantuner.forbid_index",
- "List of forbidden indexes",
+ "List of forbidden indexes (deprecated)",
+ "Listed indexes will not be used in queries (deprecated, use plantuner.disable_index)",
+ &disableIndexesOutStr,
+ "",
+ PGC_USERSET,
+ 0,
+#if PG_VERSION_NUM >= 90100
+ checkDisabledIndexes,
+ assignDisabledIndexesNew,
+#else
+ assignDisabledIndexes,
+#endif
+ disabledIndexFilterShow
+ );
+
+ DefineCustomStringVariable(
+ "plantuner.disable_index",
+ "List of disabled indexes",
"Listed indexes will not be used in queries",
- &indexesOutStr,
+ &disableIndexesOutStr,
+ "",
+ PGC_USERSET,
+ 0,
+#if PG_VERSION_NUM >= 90100
+ checkDisabledIndexes,
+ assignDisabledIndexesNew,
+#else
+ assignDisabledIndexes,
+#endif
+ disabledIndexFilterShow
+ );
+
+ DefineCustomStringVariable(
+ "plantuner.enable_index",
+ "List of enabled indexes (overload plantuner.disable_index)",
+ "Listed indexes which could be used in queries even they are listed in plantuner.disable_index",
+ &enableIndexesOutStr,
"",
PGC_USERSET,
0,
- indexesOutAssign,
- IndexFilterShow
+#if PG_VERSION_NUM >= 90100
+ checkEnabledIndexes,
+ assignEnabledIndexesNew,
+#else
+ assignEnabledIndexes,
+#endif
+ enabledIndexFilterShow
+ );
+
+ DefineCustomBoolVariable(
+ "plantuner.fix_empty_table",
+ "Sets to zero estimations for empty tables",
+ "Sets to zero estimations for empty or newly created tables",
+ &fix_empty_table,
+#if PG_VERSION_NUM >= 80400
+ fix_empty_table,
+#endif
+ PGC_USERSET,
+#if PG_VERSION_NUM >= 80400
+ GUC_NOT_IN_SAMPLE,
+#if PG_VERSION_NUM >= 90100
+ NULL,
+#endif
+#endif
+ NULL,
+ NULL
);
- if (get_relation_info_hook != indexFilter )
+ if (get_relation_info_hook != execPlantuner )
{
prevHook = get_relation_info_hook;
- get_relation_info_hook = indexFilter;
+ get_relation_info_hook = execPlantuner;
}
}
projects / plantuner.git / blobdiff