Rename files and headers related to index AM

The following renaming is done so as source files related to index
access methods are more consistent with table access methods (the
original names used for index AMs ware too generic, and could be
confused as including features related to table AMs):
- amapi.h -> indexam.h.
- amapi.c -> indexamapi.c.  Here we have an equivalent with
backend/access/table/tableamapi.c.
- amvalidate.c -> indexamvalidate.c.
- amvalidate.h -> indexamvalidate.h.
- genam.c -> indexgenam.c.
- genam.h -> indexgenam.h.

This has been discussed during the development of v12 when table AM was
worked on, but the renaming never happened.

Author: Michael Paquier
Reviewed-by: Fabien Coelho, Julien Rouhaud
Discussion: https://postgr.es/m/20191223053434.GF34339@paquier.xyz

1 files changed, 0 insertions, 143 deletions

diff --git a/src/backend/access/index/amapi.c b/src/backend/access/index/amapi.c
deleted file mode 100644
index 450a7dce1fc..00000000000
--- a/src/backend/access/index/amapi.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * amapi.c
- *	  Support routines for API for Postgres index access methods.
- *
- * Copyright (c) 2015-2019, PostgreSQL Global Development Group
- *
- *
- * IDENTIFICATION
- *	  src/backend/access/index/amapi.c
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include "access/amapi.h"
-#include "access/htup_details.h"
-#include "catalog/pg_am.h"
-#include "catalog/pg_opclass.h"
-#include "utils/builtins.h"
-#include "utils/syscache.h"
-
-
-/*
- * GetIndexAmRoutine - call the specified access method handler routine to get
- * its IndexAmRoutine struct, which will be palloc'd in the caller's context.
- *
- * Note that if the amhandler function is built-in, this will not involve
- * any catalog access.  It's therefore safe to use this while bootstrapping
- * indexes for the system catalogs.  relcache.c relies on that.
- */
-IndexAmRoutine *
-GetIndexAmRoutine(Oid amhandler)
-{
-	Datum		datum;
-	IndexAmRoutine *routine;
-
-	datum = OidFunctionCall0(amhandler);
-	routine = (IndexAmRoutine *) DatumGetPointer(datum);
-
-	if (routine == NULL || !IsA(routine, IndexAmRoutine))
-		elog(ERROR, "index access method handler function %u did not return an IndexAmRoutine struct",
-			 amhandler);
-
-	return routine;
-}
-
-/*
- * GetIndexAmRoutineByAmId - look up the handler of the index access method
- * with the given OID, and get its IndexAmRoutine struct.
- *
- * If the given OID isn't a valid index access method, returns NULL if
- * noerror is true, else throws error.
- */
-IndexAmRoutine *
-GetIndexAmRoutineByAmId(Oid amoid, bool noerror)
-{
-	HeapTuple	tuple;
-	Form_pg_am	amform;
-	regproc		amhandler;
-
-	/* Get handler function OID for the access method */
-	tuple = SearchSysCache1(AMOID, ObjectIdGetDatum(amoid));
-	if (!HeapTupleIsValid(tuple))
-	{
-		if (noerror)
-			return NULL;
-		elog(ERROR, "cache lookup failed for access method %u",
-			 amoid);
-	}
-	amform = (Form_pg_am) GETSTRUCT(tuple);
-
-	/* Check if it's an index access method as opposed to some other AM */
-	if (amform->amtype != AMTYPE_INDEX)
-	{
-		if (noerror)
-		{
-			ReleaseSysCache(tuple);
-			return NULL;
-		}
-		ereport(ERROR,
-				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
-				 errmsg("access method \"%s\" is not of type %s",
-						NameStr(amform->amname), "INDEX")));
-	}
-
-	amhandler = amform->amhandler;
-
-	/* Complain if handler OID is invalid */
-	if (!RegProcedureIsValid(amhandler))
-	{
-		if (noerror)
-		{
-			ReleaseSysCache(tuple);
-			return NULL;
-		}
-		ereport(ERROR,
-				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
-				 errmsg("index access method \"%s\" does not have a handler",
-						NameStr(amform->amname))));
-	}
-
-	ReleaseSysCache(tuple);
-
-	/* And finally, call the handler function to get the API struct. */
-	return GetIndexAmRoutine(amhandler);
-}
-
-
-/*
- * Ask appropriate access method to validate the specified opclass.
- */
-Datum
-amvalidate(PG_FUNCTION_ARGS)
-{
-	Oid			opclassoid = PG_GETARG_OID(0);
-	bool		result;
-	HeapTuple	classtup;
-	Form_pg_opclass classform;
-	Oid			amoid;
-	IndexAmRoutine *amroutine;
-
-	classtup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassoid));
-	if (!HeapTupleIsValid(classtup))
-		elog(ERROR, "cache lookup failed for operator class %u", opclassoid);
-	classform = (Form_pg_opclass) GETSTRUCT(classtup);
-
-	amoid = classform->opcmethod;
-
-	ReleaseSysCache(classtup);
-
-	amroutine = GetIndexAmRoutineByAmId(amoid, false);
-
-	if (amroutine->amvalidate == NULL)
-		elog(ERROR, "function amvalidate is not defined for index access method %u",
-			 amoid);
-
-	result = amroutine->amvalidate(opclassoid);
-
-	pfree(amroutine);
-
-	PG_RETURN_BOOL(result);
-}