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# 2013-06-14
#
# 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 that the optimizations that disable
# ORDER BY clauses work correctly
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix orderby5
# Generate test data for a join. Verify that the join gets the
# correct answer.
#
do_execsql_test 1.1 {
CREATE TABLE t1(a,b,c);
CREATE INDEX t1bc ON t1(b,c);
EXPLAIN QUERY PLAN
SELECT DISTINCT a, b, c FROM t1 WHERE a=0;
} {~/B-TREE/}
do_execsql_test 1.2.1 {
EXPLAIN QUERY PLAN
SELECT DISTINCT a, c, b FROM t1 WHERE a=0;
} {~/B-TREE/}
do_execsql_test 1.2.2 {
EXPLAIN QUERY PLAN
SELECT DISTINCT a, c, b FROM t1 WHERE a='xyz' COLLATE nocase;
} {/B-TREE/}
do_execsql_test 1.2.3 {
EXPLAIN QUERY PLAN
SELECT DISTINCT a COLLATE nocase, c, b FROM t1 WHERE a='xyz';
} {/B-TREE/}
do_execsql_test 1.2.4 {
EXPLAIN QUERY PLAN
SELECT DISTINCT a COLLATE nocase, c, b FROM t1 WHERE a='xyz' COLLATE nocase;
} {~/B-TREE/}
do_execsql_test 1.3 {
EXPLAIN QUERY PLAN
SELECT DISTINCT b, a, c FROM t1 WHERE a=0;
} {~/B-TREE/}
do_execsql_test 1.4 {
EXPLAIN QUERY PLAN
SELECT DISTINCT b, c, a FROM t1 WHERE a=0;
} {~/B-TREE/}
do_execsql_test 1.5 {
EXPLAIN QUERY PLAN
SELECT DISTINCT c, a, b FROM t1 WHERE a=0;
} {~/B-TREE/}
do_execsql_test 1.6 {
EXPLAIN QUERY PLAN
SELECT DISTINCT c, b, a FROM t1 WHERE a=0;
} {~/B-TREE/}
do_execsql_test 1.7 {
EXPLAIN QUERY PLAN
SELECT DISTINCT c, b, a FROM t1 WHERE +a=0;
} {/B-TREE/}
# In some cases, it is faster to do repeated index lookups than it is to
# sort. But in other cases, it is faster to sort than to do repeated index
# lookups.
#
do_execsql_test 2.1a {
CREATE TABLE t2(a,b,c);
CREATE INDEX t2bc ON t2(b,c);
ANALYZE;
INSERT INTO sqlite_stat1 VALUES('t1','t1bc','1000000 10 9');
INSERT INTO sqlite_stat1 VALUES('t2','t2bc','100 10 5');
ANALYZE sqlite_master;
EXPLAIN QUERY PLAN
SELECT * FROM t2 WHERE a=0 ORDER BY a, b, c;
} {~/B-TREE/}
do_execsql_test 2.1b {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE likelihood(a=0, 0.05) ORDER BY a, b, c;
} {/B-TREE/}
do_execsql_test 2.2 {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE +a=0 ORDER BY a, b, c;
} {/B-TREE/}
do_execsql_test 2.3 {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE a=0 ORDER BY b, a, c;
} {~/B-TREE/}
do_execsql_test 2.4 {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE a=0 ORDER BY b, c, a;
} {~/B-TREE/}
do_execsql_test 2.5 {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE a=0 ORDER BY a, c, b;
} {/B-TREE/}
do_execsql_test 2.6 {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE a=0 ORDER BY c, a, b;
} {/B-TREE/}
do_execsql_test 2.7 {
EXPLAIN QUERY PLAN
SELECT * FROM t1 WHERE a=0 ORDER BY c, b, a;
} {/B-TREE/}
do_execsql_test 3.0 {
CREATE TABLE t3(a INTEGER PRIMARY KEY, b, c, d, e, f);
CREATE INDEX t3bcde ON t3(b, c, d, e);
EXPLAIN QUERY PLAN
SELECT a FROM t3 WHERE b=2 AND c=3 ORDER BY d DESC, e DESC, b, c, a DESC;
} {~/B-TREE/}
do_execsql_test 3.1 {
DROP TABLE t3;
CREATE TABLE t3(a INTEGER PRIMARY KEY, b, c, d, e, f) WITHOUT rowid;
CREATE INDEX t3bcde ON t3(b, c, d, e);
EXPLAIN QUERY PLAN
SELECT a FROM t3 WHERE b=2 AND c=3 ORDER BY d DESC, e DESC, b, c, a DESC;
} {~/B-TREE/}
finish_test
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