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Comment:Add compile time switch SQLITE_ENABLE_ICU_COLLATIONS. For enabling ICU collations without also enabling the tokenizer, the LIKE operator, the REGEXP operator, or the unicode aware upper()/lower() scalar functions.
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SHA3-256: a079f914522d7bc4b3d27d70114eb09adedfac936a64883e6ed8d382c428dd0e
User & Date: dan 2017-12-08 16:23:38.347
Context
2017-12-08
19:37
The query planner tries to avoids using indexes that use unknown collating functions. (check-in: 02013fc120 user: drh tags: trunk)
16:23
Add compile time switch SQLITE_ENABLE_ICU_COLLATIONS. For enabling ICU collations without also enabling the tokenizer, the LIKE operator, the REGEXP operator, or the unicode aware upper()/lower() scalar functions. (check-in: a079f91452 user: dan tags: trunk)
14:07
Make sure the bComplex variable in sqlite3DeleteFrom() is initialized when compiling with -DSQLITE_OMIT_TRIGGER. (check-in: e526d0c40b user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to ext/icu/icu.c.
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**
**   * Integration of ICU and SQLite collation sequences.
**
**   * An implementation of the LIKE operator that uses ICU to 
**     provide case-independent matching.
*/

#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU)



/* Include ICU headers */
#include <unicode/utypes.h>
#include <unicode/uregex.h>
#include <unicode/ustring.h>
#include <unicode/ucol.h>

#include <assert.h>

#ifndef SQLITE_CORE
  #include "sqlite3ext.h"
  SQLITE_EXTENSION_INIT1
#else
  #include "sqlite3.h"
#endif





















/*
** Maximum length (in bytes) of the pattern in a LIKE or GLOB
** operator.
*/
#ifndef SQLITE_MAX_LIKE_PATTERN_LENGTH
# define SQLITE_MAX_LIKE_PATTERN_LENGTH 50000
#endif







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**
**   * Integration of ICU and SQLite collation sequences.
**
**   * An implementation of the LIKE operator that uses ICU to 
**     provide case-independent matching.
*/

#if !defined(SQLITE_CORE)                  \
 || defined(SQLITE_ENABLE_ICU)             \
 || defined(SQLITE_ENABLE_ICU_COLLATIONS)

/* Include ICU headers */
#include <unicode/utypes.h>
#include <unicode/uregex.h>
#include <unicode/ustring.h>
#include <unicode/ucol.h>

#include <assert.h>

#ifndef SQLITE_CORE
  #include "sqlite3ext.h"
  SQLITE_EXTENSION_INIT1
#else
  #include "sqlite3.h"
#endif

/*
** This function is called when an ICU function called from within
** the implementation of an SQL scalar function returns an error.
**
** The scalar function context passed as the first argument is 
** loaded with an error message based on the following two args.
*/
static void icuFunctionError(
  sqlite3_context *pCtx,       /* SQLite scalar function context */
  const char *zName,           /* Name of ICU function that failed */
  UErrorCode e                 /* Error code returned by ICU function */
){
  char zBuf[128];
  sqlite3_snprintf(128, zBuf, "ICU error: %s(): %s", zName, u_errorName(e));
  zBuf[127] = '\0';
  sqlite3_result_error(pCtx, zBuf, -1);
}

#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU)

/*
** Maximum length (in bytes) of the pattern in a LIKE or GLOB
** operator.
*/
#ifndef SQLITE_MAX_LIKE_PATTERN_LENGTH
# define SQLITE_MAX_LIKE_PATTERN_LENGTH 50000
#endif
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  }

  if( zA && zB ){
    sqlite3_result_int(context, icuLikeCompare(zA, zB, uEsc));
  }
}

/*
** This function is called when an ICU function called from within
** the implementation of an SQL scalar function returns an error.
**
** The scalar function context passed as the first argument is 
** loaded with an error message based on the following two args.
*/
static void icuFunctionError(
  sqlite3_context *pCtx,       /* SQLite scalar function context */
  const char *zName,           /* Name of ICU function that failed */
  UErrorCode e                 /* Error code returned by ICU function */
){
  char zBuf[128];
  sqlite3_snprintf(128, zBuf, "ICU error: %s(): %s", zName, u_errorName(e));
  zBuf[127] = '\0';
  sqlite3_result_error(pCtx, zBuf, -1);
}

/*
** Function to delete compiled regexp objects. Registered as
** a destructor function with sqlite3_set_auxdata().
*/
static void icuRegexpDelete(void *p){
  URegularExpression *pExpr = (URegularExpression *)p;
  uregex_close(pExpr);







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  }

  if( zA && zB ){
    sqlite3_result_int(context, icuLikeCompare(zA, zB, uEsc));
  }
}



















/*
** Function to delete compiled regexp objects. Registered as
** a destructor function with sqlite3_set_auxdata().
*/
static void icuRegexpDelete(void *p){
  URegularExpression *pExpr = (URegularExpression *)p;
  uregex_close(pExpr);
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      icuFunctionError(p, bToUpper ? "u_strToUpper" : "u_strToLower", status);
    }
    return;
  }
  assert( 0 );     /* Unreachable */
}



/*
** Collation sequence destructor function. The pCtx argument points to
** a UCollator structure previously allocated using ucol_open().
*/
static void icuCollationDel(void *pCtx){
  UCollator *p = (UCollator *)pCtx;
  ucol_close(p);







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      icuFunctionError(p, bToUpper ? "u_strToUpper" : "u_strToLower", status);
    }
    return;
  }
  assert( 0 );     /* Unreachable */
}

#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU) */

/*
** Collation sequence destructor function. The pCtx argument points to
** a UCollator structure previously allocated using ucol_open().
*/
static void icuCollationDel(void *pCtx){
  UCollator *p = (UCollator *)pCtx;
  ucol_close(p);
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    const char *zName;                        /* Function name */
    unsigned char nArg;                       /* Number of arguments */
    unsigned short enc;                       /* Optimal text encoding */
    unsigned char iContext;                   /* sqlite3_user_data() context */
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
  } scalars[] = {
    {"icu_load_collation",  2, SQLITE_UTF8,                1, icuLoadCollation},

    {"regexp", 2, SQLITE_ANY|SQLITE_DETERMINISTIC,         0, icuRegexpFunc},
    {"lower",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
    {"lower",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
    {"like",   2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
    {"like",   3, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},

  };
  int rc = SQLITE_OK;
  int i;

  
  for(i=0; rc==SQLITE_OK && i<(int)(sizeof(scalars)/sizeof(scalars[0])); i++){
    const struct IcuScalar *p = &scalars[i];
    rc = sqlite3_create_function(
        db, p->zName, p->nArg, p->enc, 
        p->iContext ? (void*)db : (void*)0,
        p->xFunc, 0, 0







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    const char *zName;                        /* Function name */
    unsigned char nArg;                       /* Number of arguments */
    unsigned short enc;                       /* Optimal text encoding */
    unsigned char iContext;                   /* sqlite3_user_data() context */
    void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
  } scalars[] = {
    {"icu_load_collation",  2, SQLITE_UTF8,                1, icuLoadCollation},
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU)
    {"regexp", 2, SQLITE_ANY|SQLITE_DETERMINISTIC,         0, icuRegexpFunc},
    {"lower",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF16|SQLITE_DETERMINISTIC,       1, icuCaseFunc16},
    {"lower",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
    {"lower",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuCaseFunc16},
    {"upper",  1, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
    {"upper",  2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        1, icuCaseFunc16},
    {"like",   2, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
    {"like",   3, SQLITE_UTF8|SQLITE_DETERMINISTIC,        0, icuLikeFunc},
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_ICU) */
  };
  int rc = SQLITE_OK;
  int i;

  
  for(i=0; rc==SQLITE_OK && i<(int)(sizeof(scalars)/sizeof(scalars[0])); i++){
    const struct IcuScalar *p = &scalars[i];
    rc = sqlite3_create_function(
        db, p->zName, p->nArg, p->enc, 
        p->iContext ? (void*)db : (void*)0,
        p->xFunc, 0, 0
Changes to src/main.c.
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#ifdef SQLITE_ENABLE_FTS3
# include "fts3.h"
#endif
#ifdef SQLITE_ENABLE_RTREE
# include "rtree.h"
#endif
#ifdef SQLITE_ENABLE_ICU
# include "sqliteicu.h"
#endif
#ifdef SQLITE_ENABLE_JSON1
int sqlite3Json1Init(sqlite3*);
#endif
#ifdef SQLITE_ENABLE_STMTVTAB
int sqlite3StmtVtabInit(sqlite3*);







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#ifdef SQLITE_ENABLE_FTS3
# include "fts3.h"
#endif
#ifdef SQLITE_ENABLE_RTREE
# include "rtree.h"
#endif
#if defined(SQLITE_ENABLE_ICU) || defined(SQLITE_ENABLE_ICU_COLLATIONS)
# include "sqliteicu.h"
#endif
#ifdef SQLITE_ENABLE_JSON1
int sqlite3Json1Init(sqlite3*);
#endif
#ifdef SQLITE_ENABLE_STMTVTAB
int sqlite3StmtVtabInit(sqlite3*);
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#ifdef SQLITE_ENABLE_FTS3 /* automatically defined by SQLITE_ENABLE_FTS4 */
  if( !db->mallocFailed && rc==SQLITE_OK ){
    rc = sqlite3Fts3Init(db);
  }
#endif

#ifdef SQLITE_ENABLE_ICU
  if( !db->mallocFailed && rc==SQLITE_OK ){
    rc = sqlite3IcuInit(db);
  }
#endif

#ifdef SQLITE_ENABLE_RTREE
  if( !db->mallocFailed && rc==SQLITE_OK){







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#ifdef SQLITE_ENABLE_FTS3 /* automatically defined by SQLITE_ENABLE_FTS4 */
  if( !db->mallocFailed && rc==SQLITE_OK ){
    rc = sqlite3Fts3Init(db);
  }
#endif

#if defined(SQLITE_ENABLE_ICU) || defined(SQLITE_ENABLE_ICU_COLLATIONS)
  if( !db->mallocFailed && rc==SQLITE_OK ){
    rc = sqlite3IcuInit(db);
  }
#endif

#ifdef SQLITE_ENABLE_RTREE
  if( !db->mallocFailed && rc==SQLITE_OK){
Changes to src/test_config.c.
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#endif

#ifdef SQLITE_ENABLE_ICU
  Tcl_SetVar2(interp, "sqlite_options", "icu", "1", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "icu", "0", TCL_GLOBAL_ONLY);
#endif







#ifdef SQLITE_OMIT_INCRBLOB
  Tcl_SetVar2(interp, "sqlite_options", "incrblob", "0", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "incrblob", "1", TCL_GLOBAL_ONLY);
#endif /* SQLITE_OMIT_AUTOVACUUM */








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#endif

#ifdef SQLITE_ENABLE_ICU
  Tcl_SetVar2(interp, "sqlite_options", "icu", "1", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "icu", "0", TCL_GLOBAL_ONLY);
#endif

#ifdef SQLITE_ENABLE_ICU_COLLATIONS
  Tcl_SetVar2(interp, "sqlite_options", "icu_collations", "1", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "icu_collations", "0", TCL_GLOBAL_ONLY);
#endif

#ifdef SQLITE_OMIT_INCRBLOB
  Tcl_SetVar2(interp, "sqlite_options", "incrblob", "0", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "incrblob", "1", TCL_GLOBAL_ONLY);
#endif /* SQLITE_OMIT_AUTOVACUUM */

Changes to test/icu.test.
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#
# $Id: icu.test,v 1.2 2008/07/12 14:52:20 drh Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !icu {
  finish_test
  return
}

# Create a table to work with.
#
execsql {CREATE TABLE test1(i1 int, i2 int, r1 real, r2 real, t1 text, t2 text)}
execsql {INSERT INTO test1 VALUES(1,2,1.1,2.2,'hello','world')}
proc test_expr {name settings expr result} {
  do_test $name [format {
    lindex [db eval {
      BEGIN; 
      UPDATE test1 SET %s; 
      SELECT %s FROM test1; 
      ROLLBACK;
    }] 0
  } $settings $expr] $result
}



# Tests of the REGEXP operator.
#
test_expr icu-1.1 {i1='hello'} {i1 REGEXP 'hello'}  1
test_expr icu-1.2 {i1='hello'} {i1 REGEXP '.ello'}  1
test_expr icu-1.3 {i1='hello'} {i1 REGEXP '.ell'}   0
test_expr icu-1.4 {i1='hello'} {i1 REGEXP '.ell.*'} 1
test_expr icu-1.5 {i1=NULL}    {i1 REGEXP '.ell.*'} {}

# Some non-ascii characters with defined case mappings
#
set ::EGRAVE "\xC8"
set ::egrave "\xE8"

set ::OGRAVE "\xD2"
set ::ograve "\xF2"

# That German letter that looks a bit like a B. The
# upper-case version of which is "SS" (two characters).
#
set ::szlig "\xDF" 

# Tests of the upper()/lower() functions.
#
test_expr icu-2.1 {i1='HellO WorlD'} {upper(i1)} {HELLO WORLD}
test_expr icu-2.2 {i1='HellO WorlD'} {lower(i1)} {hello world}
test_expr icu-2.3 {i1=$::egrave} {lower(i1)}     $::egrave
test_expr icu-2.4 {i1=$::egrave} {upper(i1)}     $::EGRAVE
test_expr icu-2.5 {i1=$::ograve} {lower(i1)}     $::ograve
test_expr icu-2.6 {i1=$::ograve} {upper(i1)}     $::OGRAVE
test_expr icu-2.3 {i1=$::EGRAVE} {lower(i1)}     $::egrave
test_expr icu-2.4 {i1=$::EGRAVE} {upper(i1)}     $::EGRAVE
test_expr icu-2.5 {i1=$::OGRAVE} {lower(i1)}     $::ograve
test_expr icu-2.6 {i1=$::OGRAVE} {upper(i1)}     $::OGRAVE

test_expr icu-2.7 {i1=$::szlig} {upper(i1)}      "SS"
test_expr icu-2.8 {i1='SS'} {lower(i1)}          "ss"

do_execsql_test icu-2.9 {
  SELECT upper(char(0xfb04,0xfb04,0xfb04,0xfb04));
} {FFLFFLFFLFFL}

# In turkish (locale="tr_TR"), the lower case version of I
# is "small dotless i" (code point 0x131 (decimal 305)).
#
set ::small_dotless_i "\u0131"
test_expr icu-3.1 {i1='I'} {lower(i1)}           "i"
test_expr icu-3.2 {i1='I'} {lower(i1, 'tr_tr')}  $::small_dotless_i
test_expr icu-3.3 {i1='I'} {lower(i1, 'en_AU')}  "i"


#--------------------------------------------------------------------
# Test the collation sequence function.
#
do_test icu-4.1 {
  execsql {
    CREATE TABLE fruit(name);







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#
# $Id: icu.test,v 1.2 2008/07/12 14:52:20 drh Exp $
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !icu&&!icu_collations {
  finish_test
  return
}

# Create a table to work with.
#
execsql {CREATE TABLE test1(i1 int, i2 int, r1 real, r2 real, t1 text, t2 text)}
execsql {INSERT INTO test1 VALUES(1,2,1.1,2.2,'hello','world')}
proc test_expr {name settings expr result} {
  do_test $name [format {
    lindex [db eval {
      BEGIN; 
      UPDATE test1 SET %s; 
      SELECT %s FROM test1; 
      ROLLBACK;
    }] 0
  } $settings $expr] $result
}

ifcapable icu {

  # Tests of the REGEXP operator.
  #
  test_expr icu-1.1 {i1='hello'} {i1 REGEXP 'hello'}  1
  test_expr icu-1.2 {i1='hello'} {i1 REGEXP '.ello'}  1
  test_expr icu-1.3 {i1='hello'} {i1 REGEXP '.ell'}   0
  test_expr icu-1.4 {i1='hello'} {i1 REGEXP '.ell.*'} 1
  test_expr icu-1.5 {i1=NULL}    {i1 REGEXP '.ell.*'} {}

  # Some non-ascii characters with defined case mappings
  #
  set ::EGRAVE "\xC8"
  set ::egrave "\xE8"

  set ::OGRAVE "\xD2"
  set ::ograve "\xF2"

  # That German letter that looks a bit like a B. The
  # upper-case version of which is "SS" (two characters).
  #
  set ::szlig "\xDF" 

  # Tests of the upper()/lower() functions.
  #
  test_expr icu-2.1 {i1='HellO WorlD'} {upper(i1)} {HELLO WORLD}
  test_expr icu-2.2 {i1='HellO WorlD'} {lower(i1)} {hello world}
  test_expr icu-2.3 {i1=$::egrave} {lower(i1)}     $::egrave
  test_expr icu-2.4 {i1=$::egrave} {upper(i1)}     $::EGRAVE
  test_expr icu-2.5 {i1=$::ograve} {lower(i1)}     $::ograve
  test_expr icu-2.6 {i1=$::ograve} {upper(i1)}     $::OGRAVE
  test_expr icu-2.3 {i1=$::EGRAVE} {lower(i1)}     $::egrave
  test_expr icu-2.4 {i1=$::EGRAVE} {upper(i1)}     $::EGRAVE
  test_expr icu-2.5 {i1=$::OGRAVE} {lower(i1)}     $::ograve
  test_expr icu-2.6 {i1=$::OGRAVE} {upper(i1)}     $::OGRAVE

  test_expr icu-2.7 {i1=$::szlig} {upper(i1)}      "SS"
  test_expr icu-2.8 {i1='SS'} {lower(i1)}          "ss"

  do_execsql_test icu-2.9 {
    SELECT upper(char(0xfb04,0xfb04,0xfb04,0xfb04));
  } {FFLFFLFFLFFL}

  # In turkish (locale="tr_TR"), the lower case version of I
  # is "small dotless i" (code point 0x131 (decimal 305)).
  #
  set ::small_dotless_i "\u0131"
  test_expr icu-3.1 {i1='I'} {lower(i1)}           "i"
  test_expr icu-3.2 {i1='I'} {lower(i1, 'tr_tr')}  $::small_dotless_i
  test_expr icu-3.3 {i1='I'} {lower(i1, 'en_AU')}  "i"
}

#--------------------------------------------------------------------
# Test the collation sequence function.
#
do_test icu-4.1 {
  execsql {
    CREATE TABLE fruit(name);
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#-------------------------------------------------------------------------
# Test that it is not possible to call the ICU regex() function with 
# anything other than exactly two arguments. See also:
#
#   http://src.chromium.org/viewvc/chrome/trunk/src/third_party/sqlite/icu-regexp.patch?revision=34807&view=markup
#

do_catchsql_test icu-5.1 { SELECT regexp('a[abc]c.*', 'abc') } {0 1}
do_catchsql_test icu-5.2 { 
  SELECT regexp('a[abc]c.*') 
} {1 {wrong number of arguments to function regexp()}}
do_catchsql_test icu-5.3 { 
  SELECT regexp('a[abc]c.*', 'abc', 'c') 
} {1 {wrong number of arguments to function regexp()}}
do_catchsql_test icu-5.4 { 
  SELECT 'abc' REGEXP 'a[abc]c.*'
} {0 1}
do_catchsql_test icu-5.4 { SELECT 'abc' REGEXP }    {1 {near " ": syntax error}}
do_catchsql_test icu-5.5 { SELECT 'abc' REGEXP, 1 } {1 {near ",": syntax error}}


do_malloc_test icu-6.10 -sqlbody {
  SELECT upper(char(0xfb04,0xdf,0xfb04,0xe8,0xfb04));
}


finish_test







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#-------------------------------------------------------------------------
# Test that it is not possible to call the ICU regex() function with 
# anything other than exactly two arguments. See also:
#
#   http://src.chromium.org/viewvc/chrome/trunk/src/third_party/sqlite/icu-regexp.patch?revision=34807&view=markup
#
ifcapable icu {
  do_catchsql_test icu-5.1 { SELECT regexp('a[abc]c.*', 'abc') } {0 1}
  do_catchsql_test icu-5.2 { 
    SELECT regexp('a[abc]c.*') 
  } {1 {wrong number of arguments to function regexp()}}
  do_catchsql_test icu-5.3 { 
    SELECT regexp('a[abc]c.*', 'abc', 'c') 
  } {1 {wrong number of arguments to function regexp()}}
  do_catchsql_test icu-5.4 { 
    SELECT 'abc' REGEXP 'a[abc]c.*'
  } {0 1}
  do_catchsql_test icu-5.4 {SELECT 'abc' REGEXP }   {1 {near " ": syntax error}}
  do_catchsql_test icu-5.5 {SELECT 'abc' REGEXP, 1} {1 {near ",": syntax error}}
 

  do_malloc_test icu-6.10 -sqlbody {
    SELECT upper(char(0xfb04,0xdf,0xfb04,0xe8,0xfb04));
  }
}

finish_test