sqlite/test/cast.test

# 2005 June 25
#
# 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 CAST operator.
#
# $Id: cast.test,v 1.10 2008/11/06 15:33:04 drh Exp $

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

# Only run these tests if the build includes the CAST operator
ifcapable !cast {
  finish_test
  return
}

# Tests for the CAST( AS blob), CAST( AS text) and CAST( AS numeric) built-ins
#
ifcapable bloblit {
  do_test cast-1.1 {
    execsql {SELECT x'616263'}
  } abc
  do_test cast-1.2 {
    execsql {SELECT typeof(x'616263')}
  } blob
  do_test cast-1.3 {
    execsql {SELECT CAST(x'616263' AS text)}
  } abc
  do_test cast-1.4 {
    execsql {SELECT typeof(CAST(x'616263' AS text))}
  } text
  do_test cast-1.5 {
    execsql {SELECT CAST(x'616263' AS numeric)}
  } 0
  do_test cast-1.6 {
    execsql {SELECT typeof(CAST(x'616263' AS numeric))}
  } integer
  do_test cast-1.7 {
    execsql {SELECT CAST(x'616263' AS blob)}
  } abc
  do_test cast-1.8 {
    execsql {SELECT typeof(CAST(x'616263' AS blob))}
  } blob
  do_test cast-1.9 {
    execsql {SELECT CAST(x'616263' AS integer)}
  } 0
  do_test cast-1.10 {
    execsql {SELECT typeof(CAST(x'616263' AS integer))}
  } integer
}
do_test cast-1.11 {
  execsql {SELECT null}
} {{}}
do_test cast-1.12 {
  execsql {SELECT typeof(NULL)}
} null
do_test cast-1.13 {
  execsql {SELECT CAST(NULL AS text)}
} {{}}
do_test cast-1.14 {
  execsql {SELECT typeof(CAST(NULL AS text))}
} null
do_test cast-1.15 {
  execsql {SELECT CAST(NULL AS numeric)}
} {{}}
do_test cast-1.16 {
  execsql {SELECT typeof(CAST(NULL AS numeric))}
} null
do_test cast-1.17 {
  execsql {SELECT CAST(NULL AS blob)}
} {{}}
do_test cast-1.18 {
  execsql {SELECT typeof(CAST(NULL AS blob))}
} null
do_test cast-1.19 {
  execsql {SELECT CAST(NULL AS integer)}
} {{}}
do_test cast-1.20 {
  execsql {SELECT typeof(CAST(NULL AS integer))}
} null
do_test cast-1.21 {
  execsql {SELECT 123}
} {123}
do_test cast-1.22 {
  execsql {SELECT typeof(123)}
} integer
do_test cast-1.23 {
  execsql {SELECT CAST(123 AS text)}
} {123}
do_test cast-1.24 {
  execsql {SELECT typeof(CAST(123 AS text))}
} text
do_test cast-1.25 {
  execsql {SELECT CAST(123 AS numeric)}
} 123
do_test cast-1.26 {
  execsql {SELECT typeof(CAST(123 AS numeric))}
} integer
do_test cast-1.27 {
  execsql {SELECT CAST(123 AS blob)}
} {123}
do_test cast-1.28 {
  execsql {SELECT typeof(CAST(123 AS blob))}
} blob
do_test cast-1.29 {
  execsql {SELECT CAST(123 AS integer)}
} {123}
do_test cast-1.30 {
  execsql {SELECT typeof(CAST(123 AS integer))}
} integer
do_test cast-1.31 {
  execsql {SELECT 123.456}
} {123.456}
do_test cast-1.32 {
  execsql {SELECT typeof(123.456)}
} real
do_test cast-1.33 {
  execsql {SELECT CAST(123.456 AS text)}
} {123.456}
do_test cast-1.34 {
  execsql {SELECT typeof(CAST(123.456 AS text))}
} text
do_test cast-1.35 {
  execsql {SELECT CAST(123.456 AS numeric)}
} 123.456
do_test cast-1.36 {
  execsql {SELECT typeof(CAST(123.456 AS numeric))}
} real
do_test cast-1.37 {
  execsql {SELECT CAST(123.456 AS blob)}
} {123.456}
do_test cast-1.38 {
  execsql {SELECT typeof(CAST(123.456 AS blob))}
} blob
do_test cast-1.39 {
  execsql {SELECT CAST(123.456 AS integer)}
} {123}
do_test cast-1.38 {
  execsql {SELECT typeof(CAST(123.456 AS integer))}
} integer
do_test cast-1.41 {
  execsql {SELECT '123abc'}
} {123abc}
do_test cast-1.42 {
  execsql {SELECT typeof('123abc')}
} text
do_test cast-1.43 {
  execsql {SELECT CAST('123abc' AS text)}
} {123abc}
do_test cast-1.44 {
  execsql {SELECT typeof(CAST('123abc' AS text))}
} text
do_test cast-1.45 {
  execsql {SELECT CAST('123abc' AS numeric)}
} 123
do_test cast-1.46 {
  execsql {SELECT typeof(CAST('123abc' AS numeric))}
} integer
do_test cast-1.47 {
  execsql {SELECT CAST('123abc' AS blob)}
} {123abc}
do_test cast-1.48 {
  execsql {SELECT typeof(CAST('123abc' AS blob))}
} blob
do_test cast-1.49 {
  execsql {SELECT CAST('123abc' AS integer)}
} 123
do_test cast-1.50 {
  execsql {SELECT typeof(CAST('123abc' AS integer))}
} integer
do_test cast-1.51 {
  execsql {SELECT CAST('123.5abc' AS numeric)}
} 123.5
do_test cast-1.53 {
  execsql {SELECT CAST('123.5abc' AS integer)}
} 123

do_test cast-1.60 {
  execsql {SELECT CAST(null AS REAL)}
} {{}}
do_test cast-1.61 {
  execsql {SELECT typeof(CAST(null AS REAL))}
} {null}
do_test cast-1.62 {
  execsql {SELECT CAST(1 AS REAL)}
} {1.0}
do_test cast-1.63 {
  execsql {SELECT typeof(CAST(1 AS REAL))}
} {real}
do_test cast-1.64 {
  execsql {SELECT CAST('1' AS REAL)}
} {1.0}
do_test cast-1.65 {
  execsql {SELECT typeof(CAST('1' AS REAL))}
} {real}
do_test cast-1.66 {
  execsql {SELECT CAST('abc' AS REAL)}
} {0.0}
do_test cast-1.67 {
  execsql {SELECT typeof(CAST('abc' AS REAL))}
} {real}
do_test cast-1.68 {
  execsql {SELECT CAST(x'31' AS REAL)}
} {1.0}
do_test cast-1.69 {
  execsql {SELECT typeof(CAST(x'31' AS REAL))}
} {real}


# Ticket #1662.  Ignore leading spaces in numbers when casting.
#
do_test cast-2.1 {
  execsql {SELECT CAST('   123' AS integer)}
} 123
do_test cast-2.2 {
  execsql {SELECT CAST('   -123.456' AS real)}
} -123.456

# ticket #2364.  Use full percision integers if possible when casting
# to numeric.  Do not fallback to real (and the corresponding 48-bit
# mantissa) unless absolutely necessary.
#
do_test cast-3.1 {
  execsql {SELECT CAST(9223372036854774800 AS integer)}
} 9223372036854774800
do_test cast-3.2 {
  execsql {SELECT CAST(9223372036854774800 AS numeric)}
} 9223372036854774800
do_realnum_test cast-3.3 {
  execsql {SELECT CAST(9223372036854774800 AS real)}
} 9.22337203685477e+18
do_test cast-3.4 {
  execsql {SELECT CAST(CAST(9223372036854774800 AS real) AS integer)}
} 9223372036854774784
do_test cast-3.5 {
  execsql {SELECT CAST(-9223372036854774800 AS integer)}
} -9223372036854774800
do_test cast-3.6 {
  execsql {SELECT CAST(-9223372036854774800 AS numeric)}
} -9223372036854774800
do_realnum_test cast-3.7 {
  execsql {SELECT CAST(-9223372036854774800 AS real)}
} -9.22337203685477e+18
do_test cast-3.8 {
  execsql {SELECT CAST(CAST(-9223372036854774800 AS real) AS integer)}
} -9223372036854774784
do_test cast-3.11 {
  execsql {SELECT CAST('9223372036854774800' AS integer)}
} 9223372036854774800
do_test cast-3.12 {
  execsql {SELECT CAST('9223372036854774800' AS numeric)}
} 9223372036854774800
do_realnum_test cast-3.13 {
  execsql {SELECT CAST('9223372036854774800' AS real)}
} 9.22337203685477e+18
ifcapable long_double {
  do_test cast-3.14 {
    execsql {SELECT CAST(CAST('9223372036854774800' AS real) AS integer)}
  } 9223372036854774784
}
do_test cast-3.15 {
  execsql {SELECT CAST('-9223372036854774800' AS integer)}
} -9223372036854774800
do_test cast-3.16 {
  execsql {SELECT CAST('-9223372036854774800' AS numeric)}
} -9223372036854774800
do_realnum_test cast-3.17 {
  execsql {SELECT CAST('-9223372036854774800' AS real)}
} -9.22337203685477e+18
ifcapable long_double {
  do_test cast-3.18 {
    execsql {SELECT CAST(CAST('-9223372036854774800' AS real) AS integer)}
  } -9223372036854774784
}
if {[db eval {PRAGMA encoding}]=="UTF-8"} {
  do_test cast-3.21 {
    execsql {SELECT CAST(x'39323233333732303336383534373734383030' AS integer)}
  } 9223372036854774800
  do_test cast-3.22 {
    execsql {SELECT CAST(x'39323233333732303336383534373734383030' AS numeric)}
  } 9223372036854774800
  do_realnum_test cast-3.23 {
    execsql {SELECT CAST(x'39323233333732303336383534373734383030' AS real)}
  } 9.22337203685477e+18
  ifcapable long_double {
    do_test cast-3.24 {
      execsql {
        SELECT CAST(CAST(x'39323233333732303336383534373734383030' AS real)
                    AS integer)
      }
    } 9223372036854774784
  }
}
do_test cast-3.31 {
  execsql {SELECT CAST(NULL AS numeric)}
} {{}}

# Test to see if it is possible to trick SQLite into reading past 
# the end of a blob when converting it to a number.
do_test cast-3.32.1 {
  set blob "1234567890"
  set DB [sqlite3_connection_pointer db]
  set ::STMT [sqlite3_prepare $DB {SELECT CAST(? AS real)} -1 TAIL]
  sqlite3_bind_blob -static $::STMT 1 $blob 5
  sqlite3_step $::STMT
} {SQLITE_ROW}
do_test cast-3.32.2 {
  sqlite3_column_int $::STMT 0
} {12345}
do_test cast-3.32.3 {
  sqlite3_finalize $::STMT
} {SQLITE_OK}


do_test cast-4.1 {
  db eval {
    CREATE TABLE t1(a);
    INSERT INTO t1 VALUES('abc');
    SELECT a, CAST(a AS integer) FROM t1;
  }
} {abc 0}
do_test cast-4.2 {
  db eval {
    SELECT CAST(a AS integer), a FROM t1;
  }
} {0 abc}
do_test cast-4.3 {
  db eval {
    SELECT a, CAST(a AS integer), a FROM t1;
  }
} {abc 0 abc}
do_test cast-4.4 {
  db eval {
    SELECT CAST(a AS integer), a, CAST(a AS real), a FROM t1;
  }
} {0 abc 0.0 abc}

# Added 2018-01-26
#
# EVIDENCE-OF: R-48741-32454 If the prefix integer is greater than
# +9223372036854775807 then the result of the cast is exactly
# +9223372036854775807.
do_execsql_test cast-5.1 {
  SELECT CAST('9223372036854775808' AS integer);
  SELECT CAST('  +000009223372036854775808' AS integer);
  SELECT CAST('12345678901234567890123' AS INTEGER);
} {9223372036854775807 9223372036854775807 9223372036854775807}

# EVIDENCE-OF: R-06028-16857 Similarly, if the prefix integer is less
# than -9223372036854775808 then the result of the cast is exactly
# -9223372036854775808.
do_execsql_test cast-5.2 {
  SELECT CAST('-9223372036854775808' AS integer);
  SELECT CAST('-9223372036854775809' AS integer);
  SELECT CAST('-12345678901234567890123' AS INTEGER);
} {-9223372036854775808 -9223372036854775808 -9223372036854775808}

# EVIDENCE-OF: R-33990-33527 When casting to INTEGER, if the text looks
# like a floating point value with an exponent, the exponent will be
# ignored because it is no part of the integer prefix.
# EVIDENCE-OF: R-24225-46995 For example, "(CAST '123e+5' AS INTEGER)"
# results in 123, not in 12300000.
do_execsql_test cast-5.3 {
  SELECT CAST('123e+5' AS INTEGER);
  SELECT CAST('123e+5' AS NUMERIC);
  SELECT CAST('123e+5' AS REAL);
} {123 12300000 12300000.0}


# The following does not have anything to do with the CAST operator,
# but it does deal with affinity transformations.
#
do_execsql_test cast-6.1 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a NUMERIC);
  INSERT INTO t1 VALUES
     ('9000000000000000001'),
     ('9000000000000000001 '),
     (' 9000000000000000001'),
     (' 9000000000000000001 ');
  SELECT * FROM t1;
} {9000000000000000001 9000000000000000001 9000000000000000001 9000000000000000001}

# 2019-06-07
# https://www.sqlite.org/src/info/4c2d7639f076aa7c
do_execsql_test cast-7.1 {
  SELECT CAST('-' AS NUMERIC);
} {0}
do_execsql_test cast-7.2 {
  SELECT CAST('-0' AS NUMERIC);
} {0}
do_execsql_test cast-7.3 {
  SELECT CAST('+' AS NUMERIC);
} {0}
do_execsql_test cast-7.4 {
  SELECT CAST('/' AS NUMERIC);
} {0}

# 2019-06-07
# https://www.sqlite.org/src/info/e8bedb2a184001bb
do_execsql_test cast-7.10 {
  SELECT '' - 2851427734582196970;
} {-2851427734582196970}
do_execsql_test cast-7.11 {
  SELECT 0 - 2851427734582196970;
} {-2851427734582196970}
do_execsql_test cast-7.12 {
  SELECT '' - 1;
} {-1}

# 2019-06-10
# https://www.sqlite.org/src/info/dd6bffbfb6e61db9
#
# EVIDENCE-OF: R-55084-10555 Casting a TEXT or BLOB value into NUMERIC
# yields either an INTEGER or a REAL result.
#
do_execsql_test cast-7.20 {
  DROP TABLE IF EXISTS t0;
  CREATE TABLE t0 (c0 TEXT);
  INSERT INTO t0(c0) VALUES ('1.0');
  SELECT CAST(c0 AS NUMERIC) FROM t0;
} {1}

# 2019-06-10
# https://sqlite.org/src/info/27de823723a41df45af3
#
do_execsql_test cast-7.30 {
  SELECT -'.';
} 0
do_execsql_test cast-7.31 {
  SELECT '.'+0;
} 0
do_execsql_test cast-7.32 {
  SELECT CAST('.' AS numeric);
} 0
do_execsql_test cast-7.33 {
  SELECT -CAST('.' AS numeric);
} 0

# 2019-06-12
# https://www.sqlite.org/src/info/674385aeba91c774
#
do_execsql_test cast-7.40 {
  SELECT CAST('-0.0' AS numeric);
} 0
do_execsql_test cast-7.41 {
  SELECT CAST('0.0' AS numeric);
} 0
do_execsql_test cast-7.42 {
  SELECT CAST('+0.0' AS numeric);
} 0
do_execsql_test cast-7.43 {
  SELECT CAST('-1.0' AS numeric);
} -1

ifcapable utf16 {
  reset_db
  execsql { PRAGMA encoding='utf16' }

  do_execsql_test cast-8.1 {
    SELECT quote(X'310032003300')==quote(substr(X'310032003300', 1))
  } 1
  do_execsql_test cast-8.2 {
    SELECT CAST(X'310032003300' AS TEXT)
         ==CAST(substr(X'310032003300', 1) AS TEXT)
  } 1
}

reset_db
do_execsql_test cast-9.0 {
  CREATE TABLE t0(c0);
  INSERT INTO t0(c0) VALUES (0);
  CREATE VIEW v1(c0, c1) AS 
    SELECT CAST(0.0 AS NUMERIC), COUNT(*) OVER () FROM t0;
  SELECT v1.c0 FROM v1, t0 WHERE v1.c0=0; 
} {0.0}


finish_test