# 2007 January 24
#
# 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 corner cases of the INSERT statement.
#
# $Id: insert4.test,v 1.1 2007/02/24 13:23:53 drh Exp $

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

# Ticket #2252.  Make sure the an INSERT from identical tables
# does not violate constraints.
#
do_test insert4-1.1 {
  execsql {
    CREATE TABLE t1(a int, b int, check(b>a));
    CREATE TABLE t2(x int, y int);
    INSERT INTO t2 VALUES(9,1);
  }
  catchsql {
    INSERT INTO t1 SELECT * FROM t2;
  }
} {1 {constraint failed}}
do_test insert4-1.2 {
  execsql {
    SELECT * FROM t1;
  }
} {}

# Other coverage tests for the INSERT transfer optimization.
#
do_test insert4-2.1 {
  execsql {
    INSERT INTO t1 SELECT 4, 8;
    SELECT * FROM t1;
  }
} {4 8}
do_test insert4-2.2.1 {
  execsql {
    CREATE TABLE t3(a int, b int);
    INSERT INTO t2 SELECT y, x FROM t2;
    INSERT INTO t3 SELECT * FROM t2 LIMIT 1;
    SELECT * FROM t3;
  }
} {9 1}
do_test insert4-2.2.2 {
  catchsql {
    DELETE FROM t1;
    INSERT INTO t1 SELECT * FROM t2 LIMIT 1;
    SELECT * FROM t1;
  }
} {1 {constraint failed}}
do_test insert4-2.3.1 {
  execsql {
    DELETE FROM t3;
    INSERT INTO t3 SELECT DISTINCT * FROM t2;
    SELECT * FROM t3;
  }
} {9 1 1 9}
do_test insert4-2.3.2 {
  catchsql {
    DELETE FROM t1;
    INSERT INTO t1 SELECT DISTINCT * FROM t2;
  }
} {1 {constraint failed}}

finish_test