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Add some opfamily support functions to lsyscache.c

Add get_opfamily_method() and get_opfamily_member_for_cmptype() inlsyscache.c. No callers yet, but we'll add some soon. This is partof generalizing some parts of the code away from having btreehardcoded and use CompareType instead.Author: Mark Dilger <mark.dilger@enterprisedb.com>Discussion:https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com

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src
- backend/utils/cache
  - lsyscache.c
- include/utils
  - lsyscache.h

2 files changed

+48

-0

lines changed

`‎src/backend/utils/cache/lsyscache.c`

Lines changed: 44 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -184,6 +184,28 @@ get_opfamily_member(Oid opfamily, Oid lefttype, Oid righttype,`
`184`	`184`	`returnresult;`
`185`	`185`	`}`
`186`	`186`
	`187`	`+/*`
	`188`	`+ * get_opfamily_member_for_cmptype`
	`189`	`+ *Get the OID of the operator that implements the specified comparison`
	`190`	`+ *type with the specified datatypes for the specified opfamily.`
	`191`	`+ *`
	`192`	`+ * Returns InvalidOid if there is no mapping for the comparison type or no`
	`193`	`+ * pg_amop entry for the given keys.`
	`194`	`+ */`
	`195`	`+Oid`
	`196`	`+get_opfamily_member_for_cmptype(Oidopfamily,Oidlefttype,Oidrighttype,`
	`197`	`+CompareTypecmptype)`
	`198`	`+{`
	`199`	`+Oidopmethod;`
	`200`	`+StrategyNumberstrategy;`
	`201`	`+`
	`202`	`+opmethod=get_opfamily_method(opfamily);`
	`203`	`+strategy=IndexAmTranslateCompareType(cmptype,opmethod,opfamily, true);`
	`204`	`+if (!strategy)`
	`205`	`+returnInvalidOid;`
	`206`	`+returnget_opfamily_member(opfamily,lefttype,righttype,strategy);`
	`207`	`+}`
	`208`	`+`
`187`	`209`	`/*`
`188`	`210`	`* get_ordering_op_properties`
`189`	`211`	`*Given the OID of an ordering operator (a btree "<" or ">" operator),`
`@@ -1288,6 +1310,28 @@ get_opclass_method(Oid opclass)`
`1288`	`1310`
`1289`	`1311`	`/---------- OPFAMILY CACHE ---------- /`
`1290`	`1312`
	`1313`	`+/*`
	`1314`	`+ * get_opfamily_method`
	`1315`	`+ *`
	`1316`	`+ *Returns the OID of the index access method the opfamily is for.`
	`1317`	`+ */`
	`1318`	`+Oid`
	`1319`	`+get_opfamily_method(Oidopfid)`
	`1320`	`+{`
	`1321`	`+HeapTupletp;`
	`1322`	`+Form_pg_opfamilyopfform;`
	`1323`	`+Oidresult;`
	`1324`	`+`
	`1325`	`+tp=SearchSysCache1(OPFAMILYOID,ObjectIdGetDatum(opfid));`
	`1326`	`+if (!HeapTupleIsValid(tp))`
	`1327`	`+elog(ERROR,"cache lookup failed for operator family %u",opfid);`
	`1328`	`+opfform= (Form_pg_opfamily)GETSTRUCT(tp);`
	`1329`	`+`
	`1330`	`+result=opfform->opfmethod;`
	`1331`	`+ReleaseSysCache(tp);`
	`1332`	`+returnresult;`
	`1333`	`+}`
	`1334`	`+`
`1291`	`1335`	`char*`
`1292`	`1336`	`get_opfamily_name(Oidopfid,boolmissing_ok)`
`1293`	`1337`	`{`

`‎src/include/utils/lsyscache.h`

Lines changed: 4 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -14,6 +14,7 @@`
`14`	`14`	`#defineLSYSCACHE_H`
`15`	`15`
`16`	`16`	`#include"access/attnum.h"`
	`17`	`+#include"access/cmptype.h"`
`17`	`18`	`#include"access/htup.h"`
`18`	`19`	`#include"nodes/pg_list.h"`
`19`	`20`
`@@ -74,6 +75,8 @@ extern void get_op_opfamily_properties(Oid opno, Oid opfamily, bool ordering_op,`
`74`	`75`	`Oid*righttype);`
`75`	`76`	`externOidget_opfamily_member(Oidopfamily,Oidlefttype,Oidrighttype,`
`76`	`77`	`int16strategy);`
	`78`	`+externOidget_opfamily_member_for_cmptype(Oidopfamily,Oidlefttype,Oidrighttype,`
	`79`	`+CompareTypecmptype);`
`77`	`80`	`externboolget_ordering_op_properties(Oidopno,`
`78`	`81`	`Oidopfamily,Oidopcintype,int16*strategy);`
`79`	`82`	`externOidget_equality_op_for_ordering_op(Oidopno,bool*reverse);`
`@@ -108,6 +111,7 @@ extern Oidget_opclass_input_type(Oid opclass);`
`108`	`111`	`externboolget_opclass_opfamily_and_input_type(Oidopclass,`
`109`	`112`	`Oidopfamily,Oidopcintype);`
`110`	`113`	`externOidget_opclass_method(Oidopclass);`
	`114`	`+externOidget_opfamily_method(Oidopfid);`
`111`	`115`	`externchar*get_opfamily_name(Oidopfid,boolmissing_ok);`
`112`	`116`	`externRegProcedureget_opcode(Oidopno);`
`113`	`117`	`externchar*get_opname(Oidopno);`

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Commit7317e64

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`‎src/backend/utils/cache/lsyscache.c`

`‎src/include/utils/lsyscache.h`

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