# 2014-03-31 # # 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. # #*********************************************************************** # # Test cases for query planning decisions where one candidate index # covers a proper superset of the WHERE clause terms of another # candidate index. # set testdir [file dirname $argv0] source $testdir/tester.tcl do_execsql_test whereH-1.1 { CREATE TABLE t1(a,b,c,d); CREATE INDEX t1abc ON t1(a,b,c); CREATE INDEX t1bc ON t1(b,c); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c>=? ORDER BY c; } {/INDEX t1abc /} do_execsql_test whereH-1.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c>=? ORDER BY c; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-2.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d); CREATE INDEX t1bc ON t1(b,c); CREATE INDEX t1abc ON t1(a,b,c); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c>=? ORDER BY c; } {/INDEX t1abc /} do_execsql_test whereH-2.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c>=? ORDER BY c; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-3.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d,e); CREATE INDEX t1cd ON t1(c,d); CREATE INDEX t1bcd ON t1(b,c,d); CREATE INDEX t1abcd ON t1(a,b,c,d); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {/INDEX t1abcd /} do_execsql_test whereH-3.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-4.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d,e); CREATE INDEX t1cd ON t1(c,d); CREATE INDEX t1abcd ON t1(a,b,c,d); CREATE INDEX t1bcd ON t1(b,c,d); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {/INDEX t1abcd /} do_execsql_test whereH-4.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-5.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d,e); CREATE INDEX t1bcd ON t1(b,c,d); CREATE INDEX t1cd ON t1(c,d); CREATE INDEX t1abcd ON t1(a,b,c,d); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {/INDEX t1abcd /} do_execsql_test whereH-5.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-6.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d,e); CREATE INDEX t1bcd ON t1(b,c,d); CREATE INDEX t1abcd ON t1(a,b,c,d); CREATE INDEX t1cd ON t1(c,d); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {/INDEX t1abcd /} do_execsql_test whereH-6.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-7.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d,e); CREATE INDEX t1abcd ON t1(a,b,c,d); CREATE INDEX t1bcd ON t1(b,c,d); CREATE INDEX t1cd ON t1(c,d); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {/INDEX t1abcd /} do_execsql_test whereH-7.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {~/TEMP B-TREE FOR ORDER BY/} do_execsql_test whereH-8.1 { DROP TABLE t1; CREATE TABLE t1(a,b,c,d,e); CREATE INDEX t1abcd ON t1(a,b,c,d); CREATE INDEX t1cd ON t1(c,d); CREATE INDEX t1bcd ON t1(b,c,d); EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {/INDEX t1abcd /} do_execsql_test whereH-8.2 { EXPLAIN QUERY PLAN SELECT d FROM t1 WHERE a=? AND b=? AND c=? AND d>=? ORDER BY d; } {~/TEMP B-TREE FOR ORDER BY/} finish_test