3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus is on testing that cursor-hints are correct for queries
13 # involving LEFT JOIN.
17 set testdir [file dirname $argv0]
18 source $testdir/tester.tcl
19 set ::testprefix cursorhint2
21 ifcapable !cursorhints {
26 proc extract_hints {sql} {
28 db eval "SELECT tbl_name, rootpage FROM sqlite_master where rootpage" {
29 set lookup($rootpage) $tbl_name
33 db eval "EXPLAIN $sql" a {
34 switch -- $a(opcode) {
36 set csr($a(p1)) $lookup($a(p2))
39 lappend ret $csr($a(p1)) $a(p4)
47 proc do_extract_hints_test {tn sql ret} {
48 uplevel [list do_test $tn [list extract_hints $sql] [list {*}$ret]]
52 PRAGMA automatic_index = 0;
53 CREATE TABLE t1(a, b);
54 CREATE TABLE t2(c, d);
55 CREATE TABLE t3(e, f);
58 do_extract_hints_test 1.1 {
59 SELECT * FROM t1 WHERE a=1;
64 do_extract_hints_test 1.2 {
65 SELECT * FROM t1 CROSS JOIN t2 ON (a=c) WHERE d IS NULL;
67 t2 {AND(ISNULL(c1),EQ(r[1],c0))}
70 do_extract_hints_test 1.3 {
71 SELECT * FROM t1 LEFT JOIN t2 ON (a=c) WHERE d IS NULL;
76 do_extract_hints_test 1.4 {
77 SELECT * FROM t1 LEFT JOIN t2 ON (a=c AND a=10) WHERE d IS NULL;
79 t2 {AND(EQ(r[2],c0),EQ(r[3],10))}
82 do_extract_hints_test 1.5 {
83 SELECT * FROM t1 CROSS JOIN t2 ON (a=c AND a=10) WHERE d IS NULL;
85 t1 EQ(c0,10) t2 {AND(ISNULL(c1),EQ(r[3],c0))}
88 do_extract_hints_test 1.6 {
89 SELECT * FROM t1 LEFT JOIN t2 ON (a=c) LEFT JOIN t3 ON (d=f);
91 t2 {EQ(r[2],c0)} t3 {EQ(r[6],c1)}
95 do_extract_hints_test 1.7 {
96 SELECT * FROM t1 LEFT JOIN t2 ON (a=c AND d=e) LEFT JOIN t3 ON (d=f);
98 t2 {EQ(r[2],c0)} t3 {AND(EQ(r[6],c0),EQ(r[7],c1))}
102 #-------------------------------------------------------------------------
104 do_execsql_test 2.0 {
105 CREATE TABLE x1(x, y);
106 CREATE TABLE x2(a, b);
109 do_extract_hints_test 2.1 {
110 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE b IS NULL;
115 do_extract_hints_test 2.2 {
116 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE b IS +NULL;
121 do_extract_hints_test 2.3 {
122 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 1 = (b IS NULL)
127 do_extract_hints_test 2.4 {
128 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 1 = coalesce(b, 1)
133 do_extract_hints_test 2.5 {
134 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 1 = coalesce(b, 1)
140 # These tests no longer work due to the LEFT-JOIN strength reduction
142 do_extract_hints_test 2.6 {
143 SELECT * FROM x1 CROSS JOIN x2 ON (a=x) WHERE 0 = (b IS NOT NULL)
148 do_extract_hints_test 2.7 {
149 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE 0 = (b IS NOT +NULL)
154 do_extract_hints_test 2.8 {
155 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE b IS NOT +NULL
160 do_extract_hints_test 2.9 {
161 SELECT * FROM x1 LEFT JOIN x2 ON (a=x)
162 WHERE CASE b WHEN 0 THEN 0 ELSE 1 END;
167 do_extract_hints_test 2.10 {
168 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE x2.b = 32+32
170 x2 {AND(EQ(c1,ADD(32,32)),EQ(c0,r[2]))}
174 # This test only works using the built-in LIKE, not the ICU LIKE extension.
175 do_extract_hints_test 2.11 {
176 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE x2.b LIKE 'abc%'
178 x2 {AND(expr,EQ(c0,r[2]))}
183 do_extract_hints_test 2.12 {
184 SELECT * FROM x1 LEFT JOIN x2 ON (a=x) WHERE coalesce(x2.b, 1)
190 do_execsql_test 3.0 {
191 CREATE TABLE t1 (i1 TEXT);
192 CREATE TABLE t2 (i2 TEXT UNIQUE);
193 INSERT INTO t1 VALUES('0');
194 INSERT INTO t2 VALUES('0');
197 do_extract_hints_test 3.1 {
198 SELECT * FROM t1 CROSS JOIN t2 WHERE (t1.i1 = t2.i2) AND t2.i2 = 1;
200 t1 {EQ(c0,r[1])} t2 EQ(c0,1)