# 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