348e002ec9
terms originating in the ON/USING clause, as demonstrated by [forum:/forumpost/6cf3bb457c3f4685|forum post 6cf3bb457c3f4685]. This check-in disables that optimization for ON/USING terms. Also improve the TreeView display for the resulting "true"/"false" nodes to show that they originate from the ON/USING clause. Add a testcase() to the other optimization to show that it can still be used for ON/USING terms. FossilOrigin-Name: 1f6796044008e6f3a61bcf390c0c7eb31947e971f0edada74e7a3a211f8ae76a
133 lines
3.3 KiB
Plaintext
133 lines
3.3 KiB
Plaintext
# 2021 February 15
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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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# This file implements regression tests for SQLite library. The
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# focus of this file is testing optimizations associated with "IS NULL"
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# and "IS NOT NULL" operators on columns with NOT NULL constraints.
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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 notnull2
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do_execsql_test 1.0 {
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CREATE TABLE t1(a, b);
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CREATE TABLE t2(c, d NOT NULL);
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WITH x(i) AS (
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SELECT 1 UNION ALL SELECT i+1 FROM x WHERE i<1000
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)
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INSERT INTO t1 SELECT i, i FROM x;
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INSERT INTO t2 SELECT * FROM t1;
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}
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proc do_vmstep_test {tn sql nstep {res {}}} {
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uplevel [list do_execsql_test $tn.0 $sql $res]
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set vmstep [db status vmstep]
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if {[string range $nstep 0 0]=="+"} {
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set body "if {$vmstep<$nstep} {
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error \"got $vmstep, expected more than [string range $nstep 1 end]\"
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}"
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} else {
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set body "if {$vmstep>$nstep} {
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error \"got $vmstep, expected less than $nstep\"
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}"
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}
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# set name "$tn.vmstep=$vmstep,expect=$nstep"
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set name "$tn.1"
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uplevel [list do_test $name $body {}]
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}
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do_vmstep_test 1.1.1 {
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SELECT * FROM t1 LEFT JOIN t2 WHERE a=c AND d IS NULL;
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} 100 {}
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do_vmstep_test 1.1.2 {
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SELECT * FROM t1 LEFT JOIN t2 WHERE a=c AND c IS NULL;
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} +1000 {}
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do_vmstep_test 1.2.1 {
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SELECT * FROM ( SELECT * FROM t2 ) WHERE d IS NULL
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} 100 {}
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do_vmstep_test 1.2.2 {
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SELECT * FROM ( SELECT * FROM t2 ) WHERE c IS NULL
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} +1000 {}
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do_vmstep_test 1.3.1 {
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SELECT * FROM t2 WHERE d IS NULL
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} 100 {}
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do_vmstep_test 1.3.2 {
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SELECT * FROM t2 WHERE c IS NULL
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} +1000 {}
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do_vmstep_test 1.4.1 {
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SELECT (d IS NOT NULL) FROM t2 WHERE 0==( d IS NOT NULL )
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} 100 {}
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do_vmstep_test 1.4.2 {
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SELECT * FROM t2 WHERE 0==( c IS NOT NULL )
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} +1000 {}
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do_vmstep_test 1.5.1 {
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SELECT count(*) FROM t2 WHERE EXISTS(
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SELECT t2.d IS NULL FROM t1 WHERE t1.a=450
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)
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} 10000 {1000}
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do_vmstep_test 1.5.2 {
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SELECT count(*) FROM t2 WHERE EXISTS(
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SELECT t2.c IS NULL FROM t1 WHERE t1.a=450
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)
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} +100000 {1000}
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#-------------------------------------------------------------------------
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reset_db
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do_execsql_test 2.0 {
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CREATE TABLE T1(a INTEGER PRIMARY KEY, b);
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CREATE TABLE T3(k, v);
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}
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do_execsql_test 2.1 {
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SELECT * FROM (SELECT a, b FROM t1) LEFT JOIN t3 ON a IS NULL;
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}
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#-------------------------------------------------------------------------
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reset_db
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do_execsql_test 3.0 {
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CREATE TABLE t0(c0 PRIMARY KEY);
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INSERT INTO t0(c0) VALUES (0);
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}
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do_execsql_test 3.1 {
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SELECT * FROM t0 WHERE ((c0 NOT NULL) AND 1) OR (c0 == NULL);
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} {0}
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# 2021-07-22 https://sqlite.org/forum/forumpost/2078b7edd2
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#
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reset_db
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do_execsql_test 4.0 {
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SELECT *, '/'
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FROM (
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SELECT NULL val FROM (SELECT 1)
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UNION ALL
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SELECT 'missing' FROM (SELECT 1)
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) a
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LEFT JOIN (SELECT 1)
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ON a.val IS NULL;
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} {{} 1 / missing {} /}
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do_execsql_test 4.1 {
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CREATE TABLE t1(a INT);
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INSERT INTO t1(a) VALUES(1);
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CREATE TABLE t2(b INT);
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SELECT * FROM (SELECT 3 AS c FROM t1) AS t3 LEFT JOIN t2 ON c IS NULL;
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} {3 {}}
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finish_test
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