sqlite/test/bind2.test

# 2022 Feb 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.
#
#***********************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix bind2


# Test that using bind_value() on a REAL sqlite3_value that was stored
# as an INTEGER works properly.
#
#   1.1: An IntReal value read from a table,
#   1.2: IntReal values obtained via the sqlite3_preupdate_old|new() 
#        interfaces.
# 
do_execsql_test 1.0 { 
  CREATE TABLE t1(a REAL);
  INSERT INTO t1 VALUES(42.0);
  SELECT * FROM t1;
} {42.0}

do_test 1.1 {
  set stmt [sqlite3_prepare db "SELECT ?" -1 tail]
  sqlite3_bind_value_from_select $stmt 1 "SELECT a FROM t1"
  sqlite3_step $stmt
  sqlite3_column_text $stmt 0
} {42.0}
sqlite3_finalize $stmt


# Bug 2026-10-18T20:41:57Z
#
# In a UTF-16 database, using sqlite3_bind_value() to copy a TEXT value
# that begins with U+FEFF or U+FFFE should copy the value exactly.  The
# leading character is not a byte-order mark.
#
foreach enc {utf16le utf16be} {
  forcedelete test.db3
  sqlite3 db3 test.db3
  do_execsql_test -db db3 2.$enc.0 "
    PRAGMA encoding = '$enc';
    CREATE TABLE t2(id INTEGER PRIMARY KEY, a TEXT);
    INSERT INTO t2 VALUES
       (1, char(0xfeff)||'abc'),
       (2, char(0xfffe)||'xyz'),
       (3, 'plain'),
       (4, char(0xfeff)||printf('%.*c', 5000, 'a')),
       (5, char(0xfffe)||printf('%.*c', 5000, 'b'));
  "
  foreach {id res} {
    1 {4 65279 1}
    2 {4 65534 1}
    3 {5 112 1}
    4 {5001 65279 1}
    5 {5001 65534 1}
  } {
    do_test 2.$enc.$id {
      set stmt [sqlite3_prepare db3 {
        SELECT length(?1), unicode(?1), ?1=(SELECT a FROM t2 WHERE id=?2)
      } -1 tail]
      sqlite3_bind_int $stmt 2 $id
      sqlite3_bind_value_from_select $stmt 1 "SELECT a FROM t2 WHERE id=$id"
      sqlite3_step $stmt
      set r [list [sqlite3_column_int $stmt 0] \
                  [sqlite3_column_int $stmt 1] \
                  [sqlite3_column_int $stmt 2]]
      sqlite3_finalize $stmt
      set r
    } $res
  }
  db3 close
}

ifcapable !preupdate {
  finish_test
  return
}

proc preup {args} {
  set stmt [sqlite3_prepare db "SELECT ?" -1 tail]
  sqlite3_bind_value_from_preupdate $stmt 1 old 0
  sqlite3_step $stmt
  lappend ::reslist [sqlite3_column_text $stmt 0]
  sqlite3_reset $stmt
  sqlite3_bind_value_from_preupdate $stmt 1 new 0
  sqlite3_step $stmt
  lappend ::reslist [sqlite3_column_text $stmt 0]
  sqlite3_finalize $stmt
}
db preupdate hook preup

do_test 1.2 {
  set ::reslist [list]
  execsql { UPDATE t1 SET a=43; }
  set ::reslist
} {42.0 43.0}

finish_test