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Changes to src/func.c.

    12     12   ** This file contains the C functions that implement various SQL
    13     13   ** functions of SQLite.  
    14     14   **
    15     15   ** There is only one exported symbol in this file - the function
    16     16   ** sqliteRegisterBuildinFunctions() found at the bottom of the file.
    17     17   ** All other code has file scope.
    18     18   **
    19         -** $Id: func.c,v 1.211 2009/01/24 11:30:43 drh Exp $
           19  +** $Id: func.c,v 1.212 2009/02/01 18:08:41 drh Exp $
    20     20   */
    21     21   #include "sqliteInt.h"
    22     22   #include <stdlib.h>
    23     23   #include <assert.h>
    24     24   #include "vdbeInt.h"
    25     25   
    26     26   /*
................................................................................
   816    816     assert( argc==3 );
   817    817     UNUSED_PARAMETER(argc);
   818    818     zStr = sqlite3_value_text(argv[0]);
   819    819     if( zStr==0 ) return;
   820    820     nStr = sqlite3_value_bytes(argv[0]);
   821    821     assert( zStr==sqlite3_value_text(argv[0]) );  /* No encoding change */
   822    822     zPattern = sqlite3_value_text(argv[1]);
   823         -  if( zPattern==0 || zPattern[0]==0 ) return;
          823  +  if( zPattern==0 ){
          824  +    assert( sqlite3_value_type(argv[1])==SQLITE_NULL );
          825  +    return;
          826  +  }
          827  +  if( zPattern[0]==0 ){
          828  +    assert( sqlite3_value_type(argv[1])!=SQLITE_NULL );
          829  +    sqlite3_result_value(context, argv[0]);
          830  +    return;
          831  +  }
   824    832     nPattern = sqlite3_value_bytes(argv[1]);
   825    833     assert( zPattern==sqlite3_value_text(argv[1]) );  /* No encoding change */
   826    834     zRep = sqlite3_value_text(argv[2]);
   827    835     if( zRep==0 ) return;
   828    836     nRep = sqlite3_value_bytes(argv[2]);
   829    837     assert( zRep==sqlite3_value_text(argv[2]) );
   830    838     nOut = nStr + 1;

Changes to test/func.test.

     7      7   #    May you find forgiveness for yourself and forgive others.
     8      8   #    May you share freely, never taking more than you give.
     9      9   #
    10     10   #***********************************************************************
    11     11   # This file implements regression tests for SQLite library.  The
    12     12   # focus of this file is testing built-in functions.
    13     13   #
    14         -# $Id: func.test,v 1.88 2009/01/31 22:28:49 drh Exp $
           14  +# $Id: func.test,v 1.89 2009/02/01 18:08:41 drh Exp $
    15     15   
    16     16   set testdir [file dirname $argv0]
    17     17   source $testdir/tester.tcl
    18     18   
    19     19   # Create a table to work with.
    20     20   #
    21     21   do_test func-0.0 {
................................................................................
   358    358   set encoding [db one {PRAGMA encoding}]
   359    359   if {$encoding=="UTF-16le"} {
   360    360     do_test func-9.11-utf16le {
   361    361       execsql {SELECT hex(replace('abcdefg','ef','12'))}
   362    362     } {6100620063006400310032006700}
   363    363     do_test func-9.12-utf16le {
   364    364       execsql {SELECT hex(replace('abcdefg','','12'))}
   365         -  } {{}}
          365  +  } {6100620063006400650066006700}
   366    366     do_test func-9.13-utf16le {
   367    367       execsql {SELECT hex(replace('aabcdefg','a','aaa'))}
   368    368     } {610061006100610061006100620063006400650066006700}
   369    369   } elseif {$encoding=="UTF-8"} {
   370    370     do_test func-9.11-utf8 {
   371    371       execsql {SELECT hex(replace('abcdefg','ef','12'))}
   372    372     } {61626364313267}
   373    373     do_test func-9.12-utf8 {
   374    374       execsql {SELECT hex(replace('abcdefg','','12'))}
   375         -  } {{}}
          375  +  } {61626364656667}
   376    376     do_test func-9.13-utf8 {
   377    377       execsql {SELECT hex(replace('aabcdefg','a','aaa'))}
   378    378     } {616161616161626364656667}
   379    379   }
   380    380     
   381    381   # Use the "sqlite_register_test_function" TCL command which is part of
   382    382   # the text fixture in order to verify correct operation of some of