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120 lines
3.4 KiB
Plaintext
120 lines
3.4 KiB
Plaintext
# 2018-06-07
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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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# A multi-key index that uses an IN operator on one of the keys other
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# than the left-most key is able to abort the IN-operator loop early
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# if key terms further to the left do not match.
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#
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# Call this the "multikey-IN-operator early-out optimization" or
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# just "IN-early-out" optimization for short.
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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 in6
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do_test in6-1.1 {
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db eval {
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CREATE TABLE t1(a,b,c,d);
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WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
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INSERT INTO t1(a,b,c,d)
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SELECT 100, 200+x/2, 300+x/5, x FROM c;
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CREATE INDEX t1abc ON t1(a,b,c);
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ANALYZE;
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UPDATE sqlite_stat1 SET stat='1000000 500000 500 50';
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ANALYZE sqlite_master;
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}
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set ::sqlite_search_count 0
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db eval {
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SELECT d FROM t1
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WHERE a=99
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AND b IN (200,205,201,204)
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AND c IN (304,302,309,308);
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}
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} {}
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do_test in6-1.2 {
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set ::sqlite_search_count
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} {0} ;# Without the IN-early-out optimization, this value would be 15
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# The multikey-IN-operator early-out optimization does not apply
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# when the IN operator is on the left-most column of the index.
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#
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do_test in6-1.3 {
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db eval {
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EXPLAIN
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SELECT d FROM t1
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WHERE a IN (98,99,100,101)
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AND b=200 AND c=300;
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}
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} {~/(IfNoHope|SeekHit)/}
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set sqlite_search_count 0
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do_execsql_test in6-1.4 {
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SELECT d FROM t1
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WHERE a=100
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AND b IN (200,201,202,204)
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AND c IN (300,302,301,305)
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ORDER BY +d;
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} {1 2 3 4 5 8 9}
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do_test in6-1.5 {
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set ::sqlite_search_count
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} {39}
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do_execsql_test in6-2.1 {
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CREATE TABLE t2(e INT UNIQUE, f TEXT);
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SELECT d, f FROM t1 LEFT JOIN t2 ON (e=d)
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WHERE a=100
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AND b IN (200,201,202,204)
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AND c IN (300,302,301,305)
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ORDER BY +d;
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} {1 {} 2 {} 3 {} 4 {} 5 {} 8 {} 9 {}}
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# 2020-03-16 ticket 82b588d342d515d1
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# Ensure that the IN-early-out optimization works with LEFT JOINs
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#
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reset_db
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do_execsql_test in6-3.100 {
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CREATE TABLE t1(a);
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INSERT INTO t1 VALUES(0);
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CREATE TABLE t2(b, c, d);
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INSERT INTO t2(b,c,d) VALUES(4,5,3),(4,5,4),(4,5,8);
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CREATE INDEX t2bcd ON t2(b, c, d);
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SELECT * FROM t1 LEFT JOIN t2 ON b=NULL AND c=5 AND d IN (2,3,4);
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} {0 {} {} {}}
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do_execsql_test in6-3.110 {
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CREATE TABLE v0(v1);
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CREATE TABLE v3(v5, v4);
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INSERT INTO v0 VALUES(0);
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CREATE INDEX v9 ON v3(v4, v4, v5);
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SELECT quote(v5) FROM v0 LEFT JOIN v3 ON v4 = NULL AND v5 IN(0);
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} {NULL}
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# 2021-04-29 forum https://sqlite.org/forum/forumpost/6a3ec138e9
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# An early OP_IsNull bypass might skip over the OP_Affinity and
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# cause the OP_IfNoHope to jump on a false-positive, resulting in
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# incomplete output.
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#
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reset_db
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do_execsql_test in6-3.120 {
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CREATE TABLE t1(a TEXT, b TEXT);
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INSERT INTO t1 VALUES(null,10),(0,10),(10,10);
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CREATE INDEX t1ab ON t1(a,b);
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SELECT quote(a), quote(b), '|' FROM t1 WHERE b in (SELECT a FROM t1) AND a=0;
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} {'0' '10' |}
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do_execsql_test in6-3.130 {
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CREATE TABLE t2(x TEXT);
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INSERT INTO t2(x) VALUES(NULL),(0),(10);
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SELECT quote(x), quote(a), quote(b), 'x'
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FROM t2 LEFT JOIN t1 ON a=x AND b in (null,0,10);
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} {NULL NULL NULL x '0' '0' '10' x '10' '10' '10' x}
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finish_test
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