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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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1
src/backend/optimizer/util/plancat.c
View File

@ -212,6 +212,7 @@ get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent,
info->relam = indexRelation->rd_rel->relam;
info->amcostestimate = indexRelation->rd_am->amcostestimate;
info->amcanorderbyop = indexRelation->rd_am->amcanorderbyop;
info->amoptionalkey = indexRelation->rd_am->amoptionalkey;
info->amsearchnulls = indexRelation->rd_am->amsearchnulls;
info->amhasgettuple = OidIsValid(indexRelation->rd_am->amgettuple);

8
src/backend/optimizer/util/predtest.c
View File

@ -1661,8 +1661,9 @@ get_btree_test_op(Oid pred_op, Oid clause_op, bool refute_it)
* From the same opfamily, find a strategy number for the clause_op,
* if possible
*/
clause_tuple = SearchSysCache2(AMOPOPID,
clause_tuple = SearchSysCache3(AMOPOPID,
ObjectIdGetDatum(clause_op),
CharGetDatum(AMOP_SEARCH),
ObjectIdGetDatum(opfamily_id));
if (HeapTupleIsValid(clause_tuple))
{
@ -1677,8 +1678,9 @@ get_btree_test_op(Oid pred_op, Oid clause_op, bool refute_it)
}
else if (OidIsValid(clause_op_negator))
{
clause_tuple = SearchSysCache2(AMOPOPID,
ObjectIdGetDatum(clause_op_negator),
clause_tuple = SearchSysCache3(AMOPOPID,
ObjectIdGetDatum(clause_op_negator),
CharGetDatum(AMOP_SEARCH),
ObjectIdGetDatum(opfamily_id));
if (HeapTupleIsValid(clause_tuple))
{