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Overview
Comment:Add tointeger() and toreal() SQL functions.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | toTypeFuncs
Files: files | file ages | folders
SHA1: af49707211ff7c7c4d30f4f457631ea8a9fa39eb
User & Date: mistachkin 2013-08-19 21:15:34
Context
2013-08-19
22:22
Additional performance improvements in sqlite3BtreeNext() and sqlite3BtreePrevious(). check-in: 6f99b54a user: drh tags: toTypeFuncs
21:15
Add tointeger() and toreal() SQL functions. check-in: af497072 user: mistachkin tags: toTypeFuncs
20:04
Performance improvement in sqlite3BtreeNext() and sqlite3BtreePrevious() for the common case of a valid cursor. check-in: dc65ad8c user: drh tags: trunk
2013-07-20
00:39
Merge updates from trunk. check-in: dd4b77c8 user: mistachkin tags: toTypeFuncs
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/func.c.

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    default: {
      assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
      sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC);
      break;
    }
  }
}





























































































/*
** The unicode() function.  Return the integer unicode code-point value
** for the first character of the input string. 
*/
static void unicodeFunc(
  sqlite3_context *context,
................................................................................
    FUNCTION(sqlite_source_id,   0, 0, 0, sourceidFunc     ),
    FUNCTION(sqlite_log,         2, 0, 0, errlogFunc       ),
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
    FUNCTION(sqlite_compileoption_used,1, 0, 0, compileoptionusedFunc  ),
    FUNCTION(sqlite_compileoption_get, 1, 0, 0, compileoptiongetFunc  ),
#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */
    FUNCTION(quote,              1, 0, 0, quoteFunc        ),


    FUNCTION(last_insert_rowid,  0, 0, 0, last_insert_rowid),
    FUNCTION(changes,            0, 0, 0, changes          ),
    FUNCTION(total_changes,      0, 0, 0, total_changes    ),
    FUNCTION(replace,            3, 0, 0, replaceFunc      ),
    FUNCTION(zeroblob,           1, 0, 0, zeroblobFunc     ),
  #ifdef SQLITE_SOUNDEX
    FUNCTION(soundex,            1, 0, 0, soundexFunc      ),







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    default: {
      assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
      sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC);
      break;
    }
  }
}

/*
** tointeger(X):  If X is any value (integer, double, or string) that can
** be losslessly converted into an integer, then make the conversion and
** return the result.  Otherwise, return NULL.
*/
static void tointegerFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  assert( argc==1 );
  UNUSED_PARAMETER(argc);
  switch( sqlite3_value_type(argv[0]) ){
    case SQLITE_FLOAT: {
      double rVal = sqlite3_value_double(argv[0]);
      i64 iVal = (i64)rVal;
      if( !sqlite3IsNaN(rVal) && rVal==(double)iVal ){
        sqlite3_result_int64(context, iVal);
      }
      break;
    }
    case SQLITE_INTEGER: {
      sqlite3_result_int64(context, sqlite3_value_int64(argv[0]));
      break;
    }
    case SQLITE_BLOB:
    case SQLITE_TEXT: {
      const unsigned char *zStr = sqlite3_value_text(argv[0]);
      if( zStr ){
        int nStr = sqlite3_value_bytes(argv[0]);
        if( nStr ){
          i64 iVal;
          if( !sqlite3Atoi64(zStr, &iVal, nStr, SQLITE_UTF8) ){
            sqlite3_result_int64(context, iVal);
          }
        }
      }
      break;
    }
    default: {
      assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
      break;
    }
  }
}

/*
** toreal(X):  If X can be losslessly converted into a real number, then
** do so and return that real number.  Otherwise return NULL.
*/
static void torealFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  assert( argc==1 );
  UNUSED_PARAMETER(argc);
  switch( sqlite3_value_type(argv[0]) ){
    case SQLITE_FLOAT: {
      sqlite3_result_double(context, sqlite3_value_double(argv[0]));
      break;
    }
    case SQLITE_INTEGER: {
      i64 iVal = sqlite3_value_int64(argv[0]);
      double rVal = (double)iVal;
      if( iVal==rVal ){
        sqlite3_result_double(context, rVal);
      }
      break;
    }
    case SQLITE_BLOB:
    case SQLITE_TEXT: {
      const unsigned char *zStr = sqlite3_value_text(argv[0]);
      if( zStr ){
        int nStr = sqlite3_value_bytes(argv[0]);
        if( nStr ){
          double rVal;
          if( sqlite3AtoF(zStr, &rVal, nStr, SQLITE_UTF8) ){
            sqlite3_result_double(context, rVal);
            return;
          }
        }
      }
      break;
    }
    default: {
      assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
      break;
    }
  }
}

/*
** The unicode() function.  Return the integer unicode code-point value
** for the first character of the input string. 
*/
static void unicodeFunc(
  sqlite3_context *context,
................................................................................
    FUNCTION(sqlite_source_id,   0, 0, 0, sourceidFunc     ),
    FUNCTION(sqlite_log,         2, 0, 0, errlogFunc       ),
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
    FUNCTION(sqlite_compileoption_used,1, 0, 0, compileoptionusedFunc  ),
    FUNCTION(sqlite_compileoption_get, 1, 0, 0, compileoptiongetFunc  ),
#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */
    FUNCTION(quote,              1, 0, 0, quoteFunc        ),
    FUNCTION(tointeger,          1, 0, 0, tointegerFunc    ),
    FUNCTION(toreal,             1, 0, 0, torealFunc       ),
    FUNCTION(last_insert_rowid,  0, 0, 0, last_insert_rowid),
    FUNCTION(changes,            0, 0, 0, changes          ),
    FUNCTION(total_changes,      0, 0, 0, total_changes    ),
    FUNCTION(replace,            3, 0, 0, replaceFunc      ),
    FUNCTION(zeroblob,           1, 0, 0, zeroblobFunc     ),
  #ifdef SQLITE_SOUNDEX
    FUNCTION(soundex,            1, 0, 0, soundexFunc      ),

Added test/func4.test.



































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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# 2013 March 10
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this file is testing the tointeger() and toreal()
# functions.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl

do_execsql_test func4-1.1 {
  SELECT tointeger(NULL);
} {{}}
do_execsql_test func4-1.2 {
  SELECT tointeger('');
} {{}}
do_execsql_test func4-1.3 {
  SELECT tointeger('   ');
} {{}}
do_execsql_test func4-1.4 {
  SELECT tointeger('1234');
} {1234}
do_execsql_test func4-1.5 {
  SELECT tointeger('   1234');
} {1234}
do_execsql_test func4-1.6 {
  SELECT tointeger('bad');
} {{}}
do_execsql_test func4-1.7 {
  SELECT tointeger('0xBAD');
} {{}}
do_execsql_test func4-1.8 {
  SELECT tointeger('123BAD');
} {{}}
do_execsql_test func4-1.9 {
  SELECT tointeger('0x123BAD');
} {{}}
do_execsql_test func4-1.10 {
  SELECT tointeger('123NO');
} {{}}
do_execsql_test func4-1.11 {
  SELECT tointeger('0x123NO');
} {{}}
do_execsql_test func4-1.12 {
  SELECT tointeger('-0x1');
} {{}}
do_execsql_test func4-1.13 {
  SELECT tointeger('-0x0');
} {{}}
do_execsql_test func4-1.14 {
  SELECT tointeger('0x0');
} {{}}
do_execsql_test func4-1.15 {
  SELECT tointeger('0x1');
} {{}}
do_execsql_test func4-1.16 {
  SELECT tointeger(-1);
} {-1}
do_execsql_test func4-1.17 {
  SELECT tointeger(-0);
} {0}
do_execsql_test func4-1.18 {
  SELECT tointeger(0);
} {0}
do_execsql_test func4-1.19 {
  SELECT tointeger(1);
} {1}
do_execsql_test func4-1.20 {
  SELECT tointeger(-1.79769313486232e308 - 1);
} {{}}
do_execsql_test func4-1.21 {
  SELECT tointeger(-1.79769313486232e308);
} {{}}
do_execsql_test func4-1.22 {
  SELECT tointeger(-1.79769313486232e308 + 1);
} {{}}
do_execsql_test func4-1.23 {
  SELECT tointeger(-9223372036854775808 - 1);
} {-9223372036854775808}
do_execsql_test func4-1.24 {
  SELECT tointeger(-9223372036854775808);
} {-9223372036854775808}
do_execsql_test func4-1.25 {
  SELECT tointeger(-9223372036854775808 + 1);
} {-9223372036854775807}
do_execsql_test func4-1.26 {
  SELECT tointeger(-2147483648 - 1);
} {-2147483649}
do_execsql_test func4-1.27 {
  SELECT tointeger(-2147483648);
} {-2147483648}
do_execsql_test func4-1.28 {
  SELECT tointeger(-2147483648 + 1);
} {-2147483647}
do_execsql_test func4-1.29 {
  SELECT tointeger(2147483647 - 1);
} {2147483646}
do_execsql_test func4-1.30 {
  SELECT tointeger(2147483647);
} {2147483647}
do_execsql_test func4-1.31 {
  SELECT tointeger(2147483647 + 1);
} {2147483648}
do_execsql_test func4-1.32 {
  SELECT tointeger(9223372036854775807 - 1);
} {9223372036854775806}
do_execsql_test func4-1.33 {
  SELECT tointeger(9223372036854775807);
} {9223372036854775807}
do_execsql_test func4-1.34 {
  SELECT tointeger(9223372036854775807 + 1);
} {{}}
do_execsql_test func4-1.35 {
  SELECT tointeger(1.79769313486232e308 - 1);
} {{}}
do_execsql_test func4-1.36 {
  SELECT tointeger(1.79769313486232e308);
} {{}}
do_execsql_test func4-1.37 {
  SELECT tointeger(1.79769313486232e308 + 1);
} {{}}
do_execsql_test func4-1.38 {
  SELECT tointeger(4503599627370496 - 1);
} {4503599627370495}
do_execsql_test func4-1.39 {
  SELECT tointeger(4503599627370496);
} {4503599627370496}
do_execsql_test func4-1.40 {
  SELECT tointeger(4503599627370496 + 1);
} {4503599627370497}
do_execsql_test func4-1.41 {
  SELECT tointeger(9007199254740992 - 1);
} {9007199254740991}
do_execsql_test func4-1.42 {
  SELECT tointeger(9007199254740992);
} {9007199254740992}
do_execsql_test func4-1.43 {
  SELECT tointeger(9007199254740992 + 1);
} {9007199254740993}
do_execsql_test func4-1.44 {
  SELECT tointeger(9223372036854775808 - 1);
} {{}}
do_execsql_test func4-1.45 {
  SELECT tointeger(9223372036854775808);
} {{}}
do_execsql_test func4-1.46 {
  SELECT tointeger(9223372036854775808 + 1);
} {{}}
do_execsql_test func4-1.47 {
  SELECT tointeger(18446744073709551616 - 1);
} {{}}
do_execsql_test func4-1.48 {
  SELECT tointeger(18446744073709551616);
} {{}}
do_execsql_test func4-1.49 {
  SELECT tointeger(18446744073709551616 + 1);
} {{}}

ifcapable floatingpoint {
  set i 0
  do_execsql_test func4-2.1 {
    SELECT toreal(NULL);
  } {{}}
  do_execsql_test func4-2.2 {
    SELECT toreal('');
  } {{}}
  do_execsql_test func4-2.3 {
    SELECT toreal('   ');
  } {{}}
  do_execsql_test func4-2.4 {
    SELECT toreal('1234');
  } {1234.0}
  do_execsql_test func4-2.5 {
    SELECT toreal('   1234');
  } {1234.0}
  do_execsql_test func4-2.6 {
    SELECT toreal('bad');
  } {{}}
  do_execsql_test func4-2.7 {
    SELECT toreal('0xBAD');
  } {{}}
  do_execsql_test func4-2.8 {
    SELECT toreal('123BAD');
  } {{}}
  do_execsql_test func4-2.9 {
    SELECT toreal('0x123BAD');
  } {{}}
  do_execsql_test func4-2.10 {
    SELECT toreal('123NO');
  } {{}}
  do_execsql_test func4-2.11 {
    SELECT toreal('0x123NO');
  } {{}}
  do_execsql_test func4-2.12 {
    SELECT toreal('-0x1');
  } {{}}
  do_execsql_test func4-2.13 {
    SELECT toreal('-0x0');
  } {{}}
  do_execsql_test func4-2.14 {
    SELECT toreal('0x0');
  } {{}}
  do_execsql_test func4-2.15 {
    SELECT toreal('0x1');
  } {{}}
  do_execsql_test func4-2.16 {
    SELECT toreal(-1);
  } {-1.0}
  do_execsql_test func4-2.17 {
    SELECT toreal(-0);
  } {0.0}
  do_execsql_test func4-2.18 {
    SELECT toreal(0);
  } {0.0}
  do_execsql_test func4-2.19 {
    SELECT toreal(1);
  } {1.0}
  do_execsql_test func4-2.20 {
    SELECT toreal(-1.79769313486232e308 - 1);
  } {-Inf}
  do_execsql_test func4-2.21 {
    SELECT toreal(-1.79769313486232e308);
  } {-Inf}
  do_execsql_test func4-2.22 {
    SELECT toreal(-1.79769313486232e308 + 1);
  } {-Inf}
  do_execsql_test func4-2.23 {
    SELECT toreal(-9223372036854775808 - 1);
  } {-9.22337203685478e+18}
  do_execsql_test func4-2.24 {
    SELECT toreal(-9223372036854775808);
  } {-9.22337203685478e+18}
  do_execsql_test func4-2.25 {
    SELECT toreal(-9223372036854775808 + 1);
  } {-9.22337203685478e+18}
  do_execsql_test func4-2.26 {
    SELECT toreal(-2147483648 - 1);
  } {-2147483649.0}
  do_execsql_test func4-2.27 {
    SELECT toreal(-2147483648);
  } {-2147483648.0}
  do_execsql_test func4-2.28 {
    SELECT toreal(-2147483648 + 1);
  } {-2147483647.0}
  do_execsql_test func4-2.29 {
    SELECT toreal(2147483647 - 1);
  } {2147483646.0}
  do_execsql_test func4-2.30 {
    SELECT toreal(2147483647);
  } {2147483647.0}
  do_execsql_test func4-2.31 {
    SELECT toreal(2147483647 + 1);
  } {2147483648.0}
  do_execsql_test func4-2.32 {
    SELECT toreal(9223372036854775807 - 1);
  } {9.22337203685478e+18}
  do_execsql_test func4-2.33 {
    SELECT toreal(9223372036854775807);
  } {9.22337203685478e+18}
  do_execsql_test func4-2.34 {
    SELECT toreal(9223372036854775807 + 1);
  } {9.22337203685478e+18}
  do_execsql_test func4-2.35 {
    SELECT toreal(1.79769313486232e308 - 1);
  } {Inf}
  do_execsql_test func4-2.36 {
    SELECT toreal(1.79769313486232e308);
  } {Inf}
  do_execsql_test func4-2.37 {
    SELECT toreal(1.79769313486232e308 + 1);
  } {Inf}
  do_execsql_test func4-2.38 {
    SELECT toreal(4503599627370496 - 1);
  } {4503599627370500.0}
  do_execsql_test func4-2.39 {
    SELECT toreal(4503599627370496);
  } {4503599627370500.0}
  do_execsql_test func4-2.40 {
    SELECT toreal(4503599627370496 + 1);
  } {4503599627370500.0}
  do_execsql_test func4-2.41 {
    SELECT toreal(9007199254740992 - 1);
  } {9007199254740990.0}
  do_execsql_test func4-2.42 {
    SELECT toreal(9007199254740992);
  } {9007199254740990.0}
  do_execsql_test func4-2.43 {
    SELECT toreal(9007199254740992 + 1);
  } {9007199254740990.0}
  do_execsql_test func4-2.44 {
    SELECT toreal(9223372036854775808 - 1);
  } {9.22337203685478e+18}
  do_execsql_test func4-2.45 {
    SELECT toreal(9223372036854775808);
  } {9.22337203685478e+18}
  do_execsql_test func4-2.46 {
    SELECT toreal(9223372036854775808 + 1);
  } {9.22337203685478e+18}
  do_execsql_test func4-2.47 {
    SELECT toreal(18446744073709551616 - 1);
  } {1.84467440737096e+19}
  do_execsql_test func4-2.48 {
    SELECT toreal(18446744073709551616);
  } {1.84467440737096e+19}
  do_execsql_test func4-2.49 {
    SELECT toreal(18446744073709551616 + 1);
  } {1.84467440737096e+19}
}

ifcapable check {
  set i 0
  do_execsql_test func4-3.1 {
    CREATE TABLE t1(
      x INTEGER CHECK(tointeger(x) IS NOT NULL AND x = CAST(x AS INTEGER))
    );
  } {}
  do_test func4-3.2 {
    catchsql {
      INSERT INTO t1 (x) VALUES (NULL);
    }
  } {1 {constraint failed}}
  do_test func4-3.3 {
    catchsql {
      INSERT INTO t1 (x) VALUES (NULL);
    }
  } {1 {constraint failed}}
  do_test func4-3.4 {
    catchsql {
      INSERT INTO t1 (x) VALUES ('');
    }
  } {1 {constraint failed}}
  do_test func4-3.5 {
    catchsql {
      INSERT INTO t1 (x) VALUES ('bad');
    }
  } {1 {constraint failed}}
  do_test func4-3.6 {
    catchsql {
      INSERT INTO t1 (x) VALUES ('1234bad');
    }
  } {1 {constraint failed}}
  do_test func4-3.7 {
    catchsql {
      INSERT INTO t1 (x) VALUES ('1234.56bad');
    }
  } {1 {constraint failed}}
  do_test func4-3.8 {
    catchsql {
      INSERT INTO t1 (x) VALUES (1234);
    }
  } {0 {}}
  do_test func4-3.9 {
    catchsql {
      INSERT INTO t1 (x) VALUES (1234.56);
    }
  } {1 {constraint failed}}
  do_test func4-3.10 {
    catchsql {
      INSERT INTO t1 (x) VALUES ('1234');
    }
  } {0 {}}
  do_test func4-3.11 {
    catchsql {
      INSERT INTO t1 (x) VALUES ('1234.56');
    }
  } {1 {constraint failed}}
  do_test func4-3.12 {
    catchsql {
      INSERT INTO t1 (x) VALUES (ZEROBLOB(4));
    }
  } {1 {constraint failed}}
  do_test func4-3.13 {
    catchsql {
      INSERT INTO t1 (x) VALUES (X'');
    }
  } {1 {constraint failed}}
  do_test func4-3.14 {
    catchsql {
      INSERT INTO t1 (x) VALUES (X'1234');
    }
  } {1 {constraint failed}}
  do_test func4-3.15 {
    catchsql {
      INSERT INTO t1 (x) VALUES (X'12345678');
    }
  } {1 {constraint failed}}
  do_execsql_test func4-3.16 {
    SELECT x FROM t1 ORDER BY x;
  } {1234 1234}

  ifcapable floatingpoint {
    set i 0
    do_execsql_test func4-4.1 {
      CREATE TABLE t2(
        x REAL CHECK(toreal(x) IS NOT NULL)
      );
    } {}
    do_test func4-4.2 {
      catchsql {
        INSERT INTO t2 (x) VALUES (NULL);
      }
    } {1 {constraint failed}}
    do_test func4-4.3 {
      catchsql {
        INSERT INTO t2 (x) VALUES (NULL);
      }
    } {1 {constraint failed}}
    do_test func4-4.4 {
      catchsql {
        INSERT INTO t2 (x) VALUES ('');
      }
    } {1 {constraint failed}}
    do_test func4-4.5 {
      catchsql {
        INSERT INTO t2 (x) VALUES ('bad');
      }
    } {1 {constraint failed}}
    do_test func4-4.6 {
      catchsql {
        INSERT INTO t2 (x) VALUES ('1234bad');
      }
    } {1 {constraint failed}}
    do_test func4-4.7 {
      catchsql {
        INSERT INTO t2 (x) VALUES ('1234.56bad');
      }
    } {1 {constraint failed}}
    do_test func4-4.8 {
      catchsql {
        INSERT INTO t2 (x) VALUES (1234);
      }
    } {0 {}}
    do_test func4-4.9 {
      catchsql {
        INSERT INTO t2 (x) VALUES (1234.56);
      }
    } {0 {}}
    do_test func4-4.10 {
      catchsql {
        INSERT INTO t2 (x) VALUES ('1234');
      }
    } {0 {}}
    do_test func4-4.11 {
      catchsql {
        INSERT INTO t2 (x) VALUES ('1234.56');
      }
    } {0 {}}
    do_test func4-4.12 {
      catchsql {
        INSERT INTO t2 (x) VALUES (ZEROBLOB(4));
      }
    } {1 {constraint failed}}
    do_test func4-4.13 {
      catchsql {
        INSERT INTO t2 (x) VALUES (X'');
      }
    } {1 {constraint failed}}
    do_test func4-4.14 {
      catchsql {
        INSERT INTO t2 (x) VALUES (X'1234');
      }
    } {1 {constraint failed}}
    do_test func4-4.15 {
      catchsql {
        INSERT INTO t2 (x) VALUES (X'12345678');
      }
    } {1 {constraint failed}}
    do_execsql_test func4-4.16 {
      SELECT x FROM t2 ORDER BY x;
    } {1234.0 1234.0 1234.56 1234.56}
  }
}

finish_test