greenplumn charlen 源码
greenplumn charlen 代码
文件路径：/gpcontrib/orafce/charlen.c
/*
* charlen.c
*
* provides a modified version of bpcharlen() that does not
* ignore trailing spaces of CHAR arguments to provide an
* Oracle compatible length() function
*/
#include "postgres.h"
#include "utils/builtins.h"
#include "access/hash.h"
#include "libpq/pqformat.h"
#include "nodes/nodeFuncs.h"
#include "utils/array.h"
#include "utils/formatting.h"
#include "mb/pg_wchar.h"
#include "fmgr.h"
#include "orafce.h"
#include "builtins.h"
PG_FUNCTION_INFO_V1(orafce_bpcharlen);
Datum
orafce_bpcharlen(PG_FUNCTION_ARGS)
{
BpChar *arg = PG_GETARG_BPCHAR_PP(0);
int len;
/* byte-length of the argument (trailing spaces not ignored) */
len = VARSIZE_ANY_EXHDR(arg);
/* in multibyte encoding, convert to number of characters */
if (pg_database_encoding_max_length() != 1)
len = pg_mbstrlen_with_len(VARDATA_ANY(arg), len);
PG_RETURN_INT32(len);
}
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