SQLite

Artifact 49d3cd791a9baa16fb461d7ea3de80d019a819cf:

• File test/autoindex4.test — part of check-in [1a1516e4] at 2015-02-24 16:48:59 on branch tkt-2326c258 — This additional fix prevents a partial index from being qualified for use if the constraint that qualifies the partial index is part of the ON clause of a LEFT JOIN. (user: drh size: 2733) [more...]

# 2014-10-24
#
# 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 script is testing automatic index creation logic,
# and specifically creation of automatic partial indexes.
#

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

do_execsql_test autoindex4-1.0 {
  CREATE TABLE t1(a,b);
  INSERT INTO t1 VALUES(123,'abc'),(234,'def'),(234,'ghi'),(345,'jkl');
  CREATE TABLE t2(x,y);
  INSERT INTO t2 VALUES(987,'zyx'),(654,'wvu'),(987,'rqp');

  SELECT *, '|' FROM t1, t2 WHERE a=234 AND x=987 ORDER BY +b;
} {234 def 987 rqp | 234 def 987 zyx | 234 ghi 987 rqp | 234 ghi 987 zyx |}
do_execsql_test autoindex4-1.1 {
  SELECT *, '|' FROM t1, t2 WHERE a=234 AND x=555;
} {}

do_execsql_test autoindex4-1.2 {
  SELECT *, '|' FROM t1 LEFT JOIN t2 ON a=234 AND x=555;
} {123 abc {} {} | 234 def {} {} | 234 ghi {} {} | 345 jkl {} {} |}
do_execsql_test autoindex4-1.3 {
  SELECT *, '|' FROM t1 LEFT JOIN t2 ON x=555 WHERE a=234;
} {234 def {} {} | 234 ghi {} {} |}
do_execsql_test autoindex4-1.4 {
  SELECT *, '|' FROM t1 LEFT JOIN t2 WHERE a=234 AND x=555;
} {}


do_execsql_test autoindex4-2.0 {
  CREATE TABLE t3(e,f);
  INSERT INTO t3 VALUES(123,654),(555,444),(234,987);

  SELECT (SELECT count(*) FROM t1, t2 WHERE a=e AND x=f), e, f, '|'
    FROM t3
   ORDER BY rowid;
} {1 123 654 | 0 555 444 | 4 234 987 |}

# Ticket [2326c258d02ead33d]
# Two joins, one with and the other without an ORDER BY clause.
# The one without ORDER BY correctly returns two rows of result.
# The one with ORDER BY returns no rows. 
#
do_execsql_test autoindex4-3.0 {
  CREATE TABLE A(Name text);
  CREATE TABLE Items(ItemName text , Name text);
  INSERT INTO Items VALUES('Item1','Parent');
  INSERT INTO Items VALUES('Item2','Parent');
  CREATE TABLE B(Name text);
  
  SELECT Items.ItemName
    FROM Items
      LEFT JOIN A ON (A.Name = Items.ItemName and Items.ItemName = 'dummy')
      LEFT JOIN B ON (B.Name = Items.ItemName)
    WHERE Items.Name = 'Parent'
    ORDER BY Items.ItemName;
} {Item1 Item2}
do_execsql_test autoindex4-3.1 {
  CREATE INDEX Items_x1 ON Items(ItemName,Name) WHERE ItemName = 'dummy';
  
  SELECT Items.ItemName
    FROM Items
      LEFT JOIN A ON (A.Name = Items.ItemName and Items.ItemName = 'dummy')
      LEFT JOIN B ON (B.Name = Items.ItemName)
    WHERE Items.Name = 'Parent'
    ORDER BY Items.ItemName;
} {Item1 Item2}


finish_test