168 lines
4.7 KiB
Plaintext
168 lines
4.7 KiB
Plaintext
# 2014-07-22
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file contains automated tests used to verify that the text terms
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# at the end of sqlite_stat1.stat are processed correctly.
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#
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# (1) "unordered" means that the index cannot be used for ORDER BY
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# or for range queries
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#
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# (2) "sz=NNN" sets the relative size of the index entries
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#
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# (3) All other fields are silently ignored
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix analyzeC
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# Baseline case. Range queries work OK. Indexes can be used for
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# ORDER BY.
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#
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do_execsql_test 1.0 {
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CREATE TABLE t1(a,b,c);
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INSERT INTO t1(a,b,c)
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VALUES(1,2,3),(7,8,9),(4,5,6),(10,11,12),(4,8,12),(1,11,111);
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CREATE INDEX t1a ON t1(a);
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CREATE INDEX t1b ON t1(b);
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ANALYZE;
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DELETE FROM sqlite_stat1;
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INSERT INTO sqlite_stat1(tbl,idx,stat)
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VALUES('t1','t1a','12345 2'),('t1','t1b','12345 4');
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ANALYZE sqlite_master;
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SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c;
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} {4 5 6 # 7 8 9 # 4 8 12 #}
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do_execsql_test 1.1 {
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EXPLAIN QUERY PLAN
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SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c;
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} {/.* USING INDEX t1a .a>. AND a<...*/}
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do_execsql_test 1.2 {
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SELECT c FROM t1 ORDER BY a;
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} {3 111 6 12 9 12}
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do_execsql_test 1.3 {
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EXPLAIN QUERY PLAN
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SELECT c FROM t1 ORDER BY a;
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} {/.*SCAN TABLE t1 USING INDEX t1a.*/}
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do_execsql_test 1.3x {
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EXPLAIN QUERY PLAN
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SELECT c FROM t1 ORDER BY a;
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} {~/.*B-TREE FOR ORDER BY.*/}
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# Now mark the t1a index as "unordered". Range queries and ORDER BY no
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# longer use the index, but equality queries do.
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#
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do_execsql_test 2.0 {
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UPDATE sqlite_stat1 SET stat='12345 2 unordered' WHERE idx='t1a';
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ANALYZE sqlite_master;
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SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c;
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} {4 5 6 # 7 8 9 # 4 8 12 #}
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do_execsql_test 2.1 {
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EXPLAIN QUERY PLAN
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SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c;
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} {~/.*USING INDEX.*/}
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do_execsql_test 2.2 {
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SELECT c FROM t1 ORDER BY a;
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} {3 111 6 12 9 12}
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do_execsql_test 2.3 {
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EXPLAIN QUERY PLAN
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SELECT c FROM t1 ORDER BY a;
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} {~/.*USING INDEX.*/}
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do_execsql_test 2.3x {
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EXPLAIN QUERY PLAN
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SELECT c FROM t1 ORDER BY a;
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} {/.*B-TREE FOR ORDER BY.*/}
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# Ignore extraneous text parameters in the sqlite_stat1.stat field.
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#
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do_execsql_test 3.0 {
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UPDATE sqlite_stat1 SET stat='12345 2 whatever=5 unordered xyzzy=11'
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WHERE idx='t1a';
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ANALYZE sqlite_master;
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SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c;
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} {4 5 6 # 7 8 9 # 4 8 12 #}
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do_execsql_test 3.1 {
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EXPLAIN QUERY PLAN
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SELECT *, '#' FROM t1 WHERE a BETWEEN 3 AND 8 ORDER BY c;
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} {~/.*USING INDEX.*/}
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do_execsql_test 3.2 {
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SELECT c FROM t1 ORDER BY a;
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} {3 111 6 12 9 12}
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do_execsql_test 3.3 {
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EXPLAIN QUERY PLAN
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SELECT c FROM t1 ORDER BY a;
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} {~/.*USING INDEX.*/}
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do_execsql_test 3.3x {
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EXPLAIN QUERY PLAN
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SELECT c FROM t1 ORDER BY a;
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} {/.*B-TREE FOR ORDER BY.*/}
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# The sz=NNN parameter determines which index to scan
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#
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do_execsql_test 4.0 {
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DROP INDEX t1a;
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CREATE INDEX t1ab ON t1(a,b);
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CREATE INDEX t1ca ON t1(c,a);
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DELETE FROM sqlite_stat1;
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INSERT INTO sqlite_stat1(tbl,idx,stat)
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VALUES('t1','t1ab','12345 3 2 sz=10'),('t1','t1ca','12345 3 2 sz=20');
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ANALYZE sqlite_master;
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SELECT count(a) FROM t1;
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} {6}
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do_execsql_test 4.1 {
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EXPLAIN QUERY PLAN
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SELECT count(a) FROM t1;
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} {/.*INDEX t1ab.*/}
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do_execsql_test 4.2 {
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DELETE FROM sqlite_stat1;
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INSERT INTO sqlite_stat1(tbl,idx,stat)
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VALUES('t1','t1ab','12345 3 2 sz=20'),('t1','t1ca','12345 3 2 sz=10');
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ANALYZE sqlite_master;
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SELECT count(a) FROM t1;
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} {6}
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do_execsql_test 4.3 {
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EXPLAIN QUERY PLAN
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SELECT count(a) FROM t1;
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} {/.*INDEX t1ca.*/}
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# The sz=NNN parameter works even if there is other extraneous text
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# in the sqlite_stat1.stat column.
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#
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do_execsql_test 5.0 {
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DELETE FROM sqlite_stat1;
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INSERT INTO sqlite_stat1(tbl,idx,stat)
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VALUES('t1','t1ab','12345 3 2 x=5 sz=10 y=10'),
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('t1','t1ca','12345 3 2 whatever sz=20 junk');
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ANALYZE sqlite_master;
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SELECT count(a) FROM t1;
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} {6}
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do_execsql_test 5.1 {
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EXPLAIN QUERY PLAN
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SELECT count(a) FROM t1;
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} {/.*INDEX t1ab.*/}
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do_execsql_test 5.2 {
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DELETE FROM sqlite_stat1;
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INSERT INTO sqlite_stat1(tbl,idx,stat)
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VALUES('t1','t1ca','12345 3 2 x=5 sz=10 y=10'),
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('t1','t1ab','12345 3 2 whatever sz=20 junk');
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ANALYZE sqlite_master;
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SELECT count(a) FROM t1;
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} {6}
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do_execsql_test 5.3 {
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EXPLAIN QUERY PLAN
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SELECT count(a) FROM t1;
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} {/.*INDEX t1ca.*/}
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finish_test
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