to_ascii( text )

        - encode 'text' from database encoding to ASCII

        to_ascii('\256\341k')


 to_ascii( text, int4 )

        - encode 'text' from 'int4' encoding to ASCII

          to_ascii('\256\341k', 8)


 to_ascii( text, name )

        - encode 'text' from 'name' encoding to ASCII

          to_ascii('\256\341k', 'LATIN2')


  Now is supported LATIN1, LATIN2, WIN1250. For other character sets I
haven't good resources. Add new encoding is easy...

 If encoding is not supported returns ERROR.

 Note --- not exists total corect conversion to ASCII, this function try
        convert chars those is _probably_ interpret-able in ASCII for
        others use ' '. But for example for all Czech characters it is
        sufficient ... hmm Chinese / JAP and other complicated langs
have
        bad luck here :-(

                                                Karel

src/backend/utils/adt/Makefile

 #
 # Makefile for utils/adt
 #
-# $Header: /cvsroot/pgsql/src/backend/utils/adt/Makefile,v 1.41 2000/07/30 22:13:52 tgl Exp $
+# $Header: /cvsroot/pgsql/src/backend/utils/adt/Makefile,v 1.42 2000/08/04 15:45:07 momjian Exp $
 #
 
 subdir = src/backend/utils/adt
@@ -23,7 +23,8 @@ OBJS = acl.o arrayfuncs.o arrayutils.o bool.o cash.o char.o \
 	regexp.o regproc.o ruleutils.o selfuncs.o sets.o \
 	tid.o timestamp.o varbit.o varchar.o varlena.o version.o \
 	network.o mac.o inet_net_ntop.o inet_net_pton.o \
-	ri_triggers.o pg_lzcompress.o pg_locale.o formatting.o
+	ri_triggers.o pg_lzcompress.o pg_locale.o formatting.o \
+	ascii.o
 
 all: SUBSYS.o
 

src/include/catalog/pg_proc.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_proc.h,v 1.157 2000/08/03 23:07:46 tgl Exp $
+ * $Id: pg_proc.h,v 1.158 2000/08/04 15:45:12 momjian Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -2442,6 +2442,14 @@ DESCR("aggregate transition function");
 DATA(insert OID = 1844 (  interval_avg	   PGUID 12 f t t t 1 f 1186 "1187" 100 0 0 100  interval_avg - ));
 DESCR("AVG aggregate final function");
 
+/* To ASCII conversion */ 
+DATA(insert OID = 1845 ( to_ascii	PGUID 12 f t t t 1 f	25 "25" 100 0 0 100  to_ascii_default - ));
+DESCR("encode text from DB encoding to ASCII text");
+DATA(insert OID = 1846 ( to_ascii	PGUID 12 f t t t 2 f	25 "25 23" 100 0 0 100  to_ascii_enc - ));
+DESCR("encode text from encoding to ASCII text");
+DATA(insert OID = 1847 ( to_ascii	PGUID 12 f t t t 2 f	25 "25 19" 100 0 0 100  to_ascii_encname - ));
+DESCR("encode text from encoding to ASCII text");
+
 DATA(insert OID = 1850 (  int28eq		   PGUID 12 f t t t 2 f 16 "21 20" 100 0 0 100  int28eq - ));
 DESCR("equal");
 DATA(insert OID = 1851 (  int28ne		   PGUID 12 f t t t 2 f 16 "21 20" 100 0 0 100  int28ne - ));