greenplumn deprecated 源码
greenplumn deprecated 代码
文件路径：/src/backend/utils/fmgr/deprecated.c
/*-------------------------------------------------------------------------
*
* deprecated.c
*
* Utility function to support deprecating functions from one release
* to the next. Deleting the function outright as part of upgrade is
* not good because it could theoretically cascade to user views, so
* instead the definition of a deprecated function should be changed
* to point to this function instead which will provide an error message
* when the function is called.
*
* Portions Copyright (c) 2010, Greenplum
* Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
*
*
* IDENTIFICATION
* src/backend/utils/fmgr/deprecated.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "funcapi.h"
#include "utils/builtins.h"
#include "utils/regproc.h"
Datum
gp_deprecated(PG_FUNCTION_ARGS)
{
/* Lookup the function that was called in the catalog */
Oid procOid = fcinfo->flinfo->fn_oid;
char *procName = format_procedure(procOid);
/* Return error that the function is deprecated */
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("function %s has been deprecated", procName)));
/* unreachable */
PG_RETURN_NULL();
}
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