159 lines
3.4 KiB
Plaintext
159 lines
3.4 KiB
Plaintext
# 2009 December 9
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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.
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#
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# This file implements tests for N-way joins (N>2) which make
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# use of USING or NATURAL JOIN. For such joins, the USING and
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# NATURAL JOIN processing needs to search all tables to the left
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# of the join looking for a match. See ticket [f74beaabde]
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# for additional information.
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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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# The problem as initially reported on the mailing list:
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#
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do_test join6-1.1 {
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execsql {
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CREATE TABLE t1(a);
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CREATE TABLE t2(a);
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CREATE TABLE t3(a,b);
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INSERT INTO t1 VALUES(1);
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INSERT INTO t3 VALUES(1,2);
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SELECT * FROM t1 LEFT JOIN t2 USING(a) LEFT JOIN t3 USING(a);
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}
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} {1 2}
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do_test join6-1.2 {
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execsql {
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SELECT t1.a, t3.b
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FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.a=t3.a;
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}
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} {1 {}}
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do_test join6-1.3 {
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execsql {
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SELECT t1.a, t3.b
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FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t1.a=t3.a;
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}
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} {1 2}
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do_test join6-2.1 {
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execsql {
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DROP TABLE t1;
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DROP TABLE t2;
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DROP TABLE t3;
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CREATE TABLE t1(x,y);
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CREATE TABLE t2(y,z);
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CREATE TABLE t3(x,z);
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INSERT INTO t1 VALUES(1,2);
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INSERT INTO t1 VALUES(3,4);
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INSERT INTO t2 VALUES(2,3);
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INSERT INTO t2 VALUES(4,5);
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INSERT INTO t3 VALUES(1,3);
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INSERT INTO t3 VALUES(3,5);
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SELECT * FROM t1 JOIN t2 USING (y) JOIN t3 USING(x);
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}
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} {1 2 3 3 3 4 5 5}
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do_test join6-2.2 {
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execsql {
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SELECT * FROM t1 NATURAL JOIN t2 NATURAL JOIN t3;
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}
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} {1 2 3 3 4 5}
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do_test join6-3.1 {
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execsql {
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DROP TABLE t1;
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DROP TABLE t2;
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DROP TABLE t3;
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CREATE TABLE t1(a,x,y);
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INSERT INTO t1 VALUES(1,91,92);
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INSERT INTO t1 VALUES(2,93,94);
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CREATE TABLE t2(b,y,z);
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INSERT INTO t2 VALUES(3,92,93);
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INSERT INTO t2 VALUES(4,94,95);
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CREATE TABLE t3(c,x,z);
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INSERT INTO t3 VALUES(5,91,93);
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INSERT INTO t3 VALUES(6,99,95);
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SELECT * FROM t1 NATURAL JOIN t2 NATURAL JOIN t3;
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}
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} {1 91 92 3 93 5}
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do_test join6-3.2 {
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execsql {
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SELECT * FROM t1 JOIN t2 NATURAL JOIN t3;
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}
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} {1 91 92 3 92 93 5}
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do_test join6-3.3 {
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execsql {
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SELECT * FROM t1 JOIN t2 USING(y) NATURAL JOIN t3;
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}
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} {1 91 92 3 93 5}
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do_test join6-3.4 {
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execsql {
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SELECT * FROM t1 NATURAL JOIN t2 JOIN t3 USING(x,z);
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}
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} {1 91 92 3 93 5}
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do_test join6-3.5 {
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execsql {
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SELECT * FROM t1 NATURAL JOIN t2 JOIN t3 USING(x);
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}
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} {1 91 92 3 93 5 93}
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do_test join6-3.6 {
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execsql {
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SELECT * FROM t1 NATURAL JOIN t2 JOIN t3 USING(z);
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}
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} {1 91 92 3 93 5 91 2 93 94 4 95 6 99}
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do_test join6-4.1 {
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execsql {
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SELECT * FROM
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(SELECT 1 AS a, 91 AS x, 92 AS y UNION SELECT 2, 93, 94)
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NATURAL JOIN t2 NATURAL JOIN t3
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}
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} {1 91 92 3 93 5}
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do_test join6-4.2 {
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execsql {
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SELECT * FROM t1 NATURAL JOIN
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(SELECT 3 AS b, 92 AS y, 93 AS z UNION SELECT 4, 94, 95)
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NATURAL JOIN t3
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}
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} {1 91 92 3 93 5}
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do_test join6-4.3 {
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execsql {
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SELECT * FROM t1 NATURAL JOIN t2 NATURAL JOIN
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(SELECT 5 AS c, 91 AS x, 93 AS z UNION SELECT 6, 99, 95)
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}
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} {1 91 92 3 93 5}
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finish_test
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