mirror of
https://github.com/postgres/postgres.git
synced 2025-07-27 12:41:57 +03:00
Bloom index contrib module
Module provides new access method. It is actually a simple Bloom filter implemented as pgsql's index. It could give some benefits on search with large number of columns. Module is a single way to test generic WAL interface committed earlier. Author: Teodor Sigaev, Alexander Korotkov Reviewers: Aleksander Alekseev, Michael Paquier, Jim Nasby
This commit is contained in:
220
contrib/bloom/blvalidate.c
Normal file
220
contrib/bloom/blvalidate.c
Normal file
@ -0,0 +1,220 @@
|
||||
/*-------------------------------------------------------------------------
|
||||
*
|
||||
* blvalidate.c
|
||||
* Opclass validator for bloom.
|
||||
*
|
||||
* Copyright (c) 2016, PostgreSQL Global Development Group
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* contrib/bloom/blvalidate.c
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
#include "postgres.h"
|
||||
|
||||
#include "access/amvalidate.h"
|
||||
#include "access/htup_details.h"
|
||||
#include "catalog/pg_amop.h"
|
||||
#include "catalog/pg_amproc.h"
|
||||
#include "catalog/pg_opclass.h"
|
||||
#include "catalog/pg_opfamily.h"
|
||||
#include "catalog/pg_type.h"
|
||||
#include "utils/builtins.h"
|
||||
#include "utils/lsyscache.h"
|
||||
#include "utils/syscache.h"
|
||||
|
||||
#include "bloom.h"
|
||||
|
||||
/*
|
||||
* Validator for a bloom opclass.
|
||||
*/
|
||||
bool
|
||||
blvalidate(Oid opclassoid)
|
||||
{
|
||||
bool result = true;
|
||||
HeapTuple classtup;
|
||||
Form_pg_opclass classform;
|
||||
Oid opfamilyoid;
|
||||
Oid opcintype;
|
||||
Oid opckeytype;
|
||||
char *opclassname;
|
||||
HeapTuple familytup;
|
||||
Form_pg_opfamily familyform;
|
||||
char *opfamilyname;
|
||||
CatCList *proclist,
|
||||
*oprlist;
|
||||
List *grouplist;
|
||||
OpFamilyOpFuncGroup *opclassgroup;
|
||||
int i;
|
||||
ListCell *lc;
|
||||
|
||||
/* Fetch opclass information */
|
||||
classtup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassoid));
|
||||
if (!HeapTupleIsValid(classtup))
|
||||
elog(ERROR, "cache lookup failed for operator class %u", opclassoid);
|
||||
classform = (Form_pg_opclass) GETSTRUCT(classtup);
|
||||
|
||||
opfamilyoid = classform->opcfamily;
|
||||
opcintype = classform->opcintype;
|
||||
opckeytype = classform->opckeytype;
|
||||
if (!OidIsValid(opckeytype))
|
||||
opckeytype = opcintype;
|
||||
opclassname = NameStr(classform->opcname);
|
||||
|
||||
/* Fetch opfamily information */
|
||||
familytup = SearchSysCache1(OPFAMILYOID, ObjectIdGetDatum(opfamilyoid));
|
||||
if (!HeapTupleIsValid(familytup))
|
||||
elog(ERROR, "cache lookup failed for operator family %u", opfamilyoid);
|
||||
familyform = (Form_pg_opfamily) GETSTRUCT(familytup);
|
||||
|
||||
opfamilyname = NameStr(familyform->opfname);
|
||||
|
||||
/* Fetch all operators and support functions of the opfamily */
|
||||
oprlist = SearchSysCacheList1(AMOPSTRATEGY, ObjectIdGetDatum(opfamilyoid));
|
||||
proclist = SearchSysCacheList1(AMPROCNUM, ObjectIdGetDatum(opfamilyoid));
|
||||
|
||||
/* Check individual support functions */
|
||||
for (i = 0; i < proclist->n_members; i++)
|
||||
{
|
||||
HeapTuple proctup = &proclist->members[i]->tuple;
|
||||
Form_pg_amproc procform = (Form_pg_amproc) GETSTRUCT(proctup);
|
||||
bool ok;
|
||||
|
||||
/*
|
||||
* All bloom support functions should be registered with matching
|
||||
* left/right types
|
||||
*/
|
||||
if (procform->amproclefttype != procform->amprocrighttype)
|
||||
{
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("bloom opfamily %s contains support procedure %s with cross-type registration",
|
||||
opfamilyname,
|
||||
format_procedure(procform->amproc))));
|
||||
result = false;
|
||||
}
|
||||
|
||||
/*
|
||||
* We can't check signatures except within the specific opclass, since
|
||||
* we need to know the associated opckeytype in many cases.
|
||||
*/
|
||||
if (procform->amproclefttype != opcintype)
|
||||
continue;
|
||||
|
||||
/* Check procedure numbers and function signatures */
|
||||
switch (procform->amprocnum)
|
||||
{
|
||||
case BLOOM_HASH_PROC:
|
||||
ok = check_amproc_signature(procform->amproc, INT4OID, false,
|
||||
1, 1, opckeytype);
|
||||
break;
|
||||
default:
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("bloom opfamily %s contains function %s with invalid support number %d",
|
||||
opfamilyname,
|
||||
format_procedure(procform->amproc),
|
||||
procform->amprocnum)));
|
||||
result = false;
|
||||
continue; /* don't want additional message */
|
||||
}
|
||||
|
||||
if (!ok)
|
||||
{
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("gist opfamily %s contains function %s with wrong signature for support number %d",
|
||||
opfamilyname,
|
||||
format_procedure(procform->amproc),
|
||||
procform->amprocnum)));
|
||||
result = false;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check individual operators */
|
||||
for (i = 0; i < oprlist->n_members; i++)
|
||||
{
|
||||
HeapTuple oprtup = &oprlist->members[i]->tuple;
|
||||
Form_pg_amop oprform = (Form_pg_amop) GETSTRUCT(oprtup);
|
||||
|
||||
/* Check it's allowed strategy for bloom */
|
||||
if (oprform->amopstrategy < 1 ||
|
||||
oprform->amopstrategy > BLOOM_NSTRATEGIES)
|
||||
{
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("bloom opfamily %s contains operator %s with invalid strategy number %d",
|
||||
opfamilyname,
|
||||
format_operator(oprform->amopopr),
|
||||
oprform->amopstrategy)));
|
||||
result = false;
|
||||
}
|
||||
|
||||
/* bloom doesn't support ORDER BY operators */
|
||||
if (oprform->amoppurpose != AMOP_SEARCH ||
|
||||
OidIsValid(oprform->amopsortfamily))
|
||||
{
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("bloom opfamily %s contains invalid ORDER BY specification for operator %s",
|
||||
opfamilyname,
|
||||
format_operator(oprform->amopopr))));
|
||||
result = false;
|
||||
}
|
||||
|
||||
/* Check operator signature --- same for all bloom strategies */
|
||||
if (!check_amop_signature(oprform->amopopr, BOOLOID,
|
||||
oprform->amoplefttype,
|
||||
oprform->amoprighttype))
|
||||
{
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("bloom opfamily %s contains operator %s with wrong signature",
|
||||
opfamilyname,
|
||||
format_operator(oprform->amopopr))));
|
||||
result = false;
|
||||
}
|
||||
}
|
||||
|
||||
/* Now check for inconsistent groups of operators/functions */
|
||||
grouplist = identify_opfamily_groups(oprlist, proclist);
|
||||
opclassgroup = NULL;
|
||||
foreach(lc, grouplist)
|
||||
{
|
||||
OpFamilyOpFuncGroup *thisgroup = (OpFamilyOpFuncGroup *) lfirst(lc);
|
||||
|
||||
/* Remember the group exactly matching the test opclass */
|
||||
if (thisgroup->lefttype == opcintype &&
|
||||
thisgroup->righttype == opcintype)
|
||||
opclassgroup = thisgroup;
|
||||
|
||||
/*
|
||||
* There is not a lot we can do to check the operator sets, since each
|
||||
* bloom opclass is more or less a law unto itself, and some contain
|
||||
* only operators that are binary-compatible with the opclass datatype
|
||||
* (meaning that empty operator sets can be OK). That case also means
|
||||
* that we shouldn't insist on nonempty function sets except for the
|
||||
* opclass's own group.
|
||||
*/
|
||||
}
|
||||
|
||||
/* Check that the originally-named opclass is complete */
|
||||
for (i = 1; i <= BLOOM_NPROC; i++)
|
||||
{
|
||||
if (opclassgroup &&
|
||||
(opclassgroup->functionset & (((uint64) 1) << i)) != 0)
|
||||
continue; /* got it */
|
||||
ereport(INFO,
|
||||
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
|
||||
errmsg("bloom opclass %s is missing support function %d",
|
||||
opclassname, i)));
|
||||
result = false;
|
||||
}
|
||||
|
||||
ReleaseCatCacheList(proclist);
|
||||
ReleaseCatCacheList(oprlist);
|
||||
ReleaseSysCache(familytup);
|
||||
ReleaseSysCache(classtup);
|
||||
|
||||
return result;
|
||||
}
|
Reference in New Issue
Block a user