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Create the system catalog infrastructure needed for KNNGIST.

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This commit adds columns amoppurpose and amopsortfamily to pg_amop, and
column amcanorderbyop to pg_am.  For the moment all the entries in
amcanorderbyop are "false", since the underlying support isn't there yet.

Also, extend the CREATE OPERATOR CLASS/ALTER OPERATOR FAMILY commands with
[ FOR SEARCH | FOR ORDER BY sort_operator_family ] clauses to allow the new
columns of pg_amop to be populated, and create pg_dump support for dumping
that information.

I also added some documentation, although it's perhaps a bit premature
given that the feature doesn't do anything useful yet.

Teodor Sigaev, Robert Haas, Tom Lane
This commit is contained in:
Tom Lane
2010-11-24 14:20:39 -05:00
parent 4fc09ad00c
commit 725d52d0c2
21 changed files with 913 additions and 475 deletions
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15
src/backend/utils/cache/lsyscache.c vendored
View File

@ -46,12 +46,15 @@ get_attavgwidth_hook_type get_attavgwidth_hook = NULL;
* op_in_opfamily
*
* Return t iff operator 'opno' is in operator family 'opfamily'.
*
* This function only considers search operators, not ordering operators.
*/
bool
op_in_opfamily(Oid opno, Oid opfamily)
{
return SearchSysCacheExists2(AMOPOPID,
return SearchSysCacheExists3(AMOPOPID,
ObjectIdGetDatum(opno),
CharGetDatum(AMOP_SEARCH),
ObjectIdGetDatum(opfamily));
}
@ -60,6 +63,8 @@ op_in_opfamily(Oid opno, Oid opfamily)
*
* Get the operator's strategy number within the specified opfamily,
* or 0 if it's not a member of the opfamily.
*
* This function only considers search operators, not ordering operators.
*/
int
get_op_opfamily_strategy(Oid opno, Oid opfamily)
@ -68,8 +73,9 @@ get_op_opfamily_strategy(Oid opno, Oid opfamily)
Form_pg_amop amop_tup;
int result;
tp = SearchSysCache2(AMOPOPID,
tp = SearchSysCache3(AMOPOPID,
ObjectIdGetDatum(opno),
CharGetDatum(AMOP_SEARCH),
ObjectIdGetDatum(opfamily));
if (!HeapTupleIsValid(tp))
return 0;
@ -85,6 +91,8 @@ get_op_opfamily_strategy(Oid opno, Oid opfamily)
* Get the operator's strategy number and declared input data types
* within the specified opfamily.
*
* This function only considers search operators, not ordering operators.
*
* Caller should already have verified that opno is a member of opfamily,
* therefore we raise an error if the tuple is not found.
*/
@ -97,8 +105,9 @@ get_op_opfamily_properties(Oid opno, Oid opfamily,
HeapTuple tp;
Form_pg_amop amop_tup;
tp = SearchSysCache2(AMOPOPID,
tp = SearchSysCache3(AMOPOPID,
ObjectIdGetDatum(opno),
CharGetDatum(AMOP_SEARCH),
ObjectIdGetDatum(opfamily));
if (!HeapTupleIsValid(tp))
elog(ERROR, "operator %u is not a member of opfamily %u",

4
src/backend/utils/cache/syscache.c vendored
View File

@ -135,11 +135,11 @@ static const struct cachedesc cacheinfo[] = {
},
{AccessMethodOperatorRelationId, /* AMOPOPID */
AccessMethodOperatorIndexId,
2,
3,
{
Anum_pg_amop_amopopr,
Anum_pg_amop_amoppurpose,
Anum_pg_amop_amopfamily,
0,
0
},
64