# 2012 April 19
#
# 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.
#
#***********************************************************************
# The tests in this file were used while developing the SQLite 4 code.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix tkt-2a5629202f
# This procedure executes the SQL. Then it checks to see if the OP_Sort
# opcode was executed. If an OP_Sort did occur, then "sort" is appended
# to the result. If no OP_Sort happened, then "nosort" is appended.
#
# This procedure is used to check to make sure sorting is or is not
# occurring as expected.
#
proc cksort {sql} {
set data [execsql $sql]
if {[db status sort]} {set x sort} {set x nosort}
lappend data $x
return $data
}
do_execsql_test 1.1 {
CREATE TABLE t8(b TEXT, c TEXT);
INSERT INTO t8 VALUES('a', 'one');
INSERT INTO t8 VALUES('b', 'two');
INSERT INTO t8 VALUES(NULL, 'three');
INSERT INTO t8 VALUES(NULL, 'four');
}
do_execsql_test 1.2 {
SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c
} {null/four null/three a/one b/two}
do_execsql_test 1.3 {
CREATE UNIQUE INDEX i1 ON t8(b);
SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c
} {null/four null/three a/one b/two}
do_execsql_test 1.4 {
DROP INDEX i1;
CREATE UNIQUE INDEX i1 ON t8(b, c);
SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c
} {null/four null/three a/one b/two}
#-------------------------------------------------------------------------
#
do_execsql_test 2.1 {
CREATE TABLE t2(a, b NOT NULL, c);
CREATE UNIQUE INDEX t2ab ON t2(a, b);
CREATE UNIQUE INDEX t2ba ON t2(b, a);
}
do_test 2.2 {
cksort { SELECT * FROM t2 WHERE a = 10 ORDER BY a, b, c }
} {nosort}
do_test 2.3 {
cksort { SELECT * FROM t2 WHERE b = 10 ORDER BY a, b, c }
} {sort}
do_test 2.4 {
cksort { SELECT * FROM t2 WHERE a IS NULL ORDER BY a, b, c }
} {sort}
finish_test