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Improve implementation of btrim/ltrim/rtrim: provide a special case for

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single-byte encodings, and a direct C implementation of the single-argument
forms (where spaces are always what gets trimmed).  This is in preparation
for using rtrim1() as the bpchar-to-text cast operator, but is a useful
performance improvement even if we decide not to do that.
This commit is contained in:
Tom Lane
2003-05-23 22:33:23 +00:00
parent 78d2156066
commit 11d5c82002
4 changed files with 246 additions and 181 deletions
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5
src/include/utils/builtins.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: builtins.h,v 1.217 2003/05/15 15:50:20 petere Exp $
* $Id: builtins.h,v 1.218 2003/05/23 22:33:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -608,9 +608,12 @@ extern Datum initcap(PG_FUNCTION_ARGS);
extern Datum lpad(PG_FUNCTION_ARGS);
extern Datum rpad(PG_FUNCTION_ARGS);
extern Datum btrim(PG_FUNCTION_ARGS);
extern Datum btrim1(PG_FUNCTION_ARGS);
extern Datum byteatrim(PG_FUNCTION_ARGS);
extern Datum ltrim(PG_FUNCTION_ARGS);
extern Datum ltrim1(PG_FUNCTION_ARGS);
extern Datum rtrim(PG_FUNCTION_ARGS);
extern Datum rtrim1(PG_FUNCTION_ARGS);
extern Datum translate(PG_FUNCTION_ARGS);
extern Datum chr(PG_FUNCTION_ARGS);
extern Datum repeat(PG_FUNCTION_ARGS);