347 lines
9.6 KiB
Plaintext
347 lines
9.6 KiB
Plaintext
# 2007 Dec 4
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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 is to test that the issues surrounding expressions in
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# ORDER BY clauses on compound SELECT statements raised by ticket
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# #2822 have been dealt with.
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#
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# $Id: tkt2822.test,v 1.6 2008/08/20 16:35:10 drh Exp $
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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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ifcapable !compound {
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finish_test
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return
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}
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# The ORDER BY matching algorithm is three steps:
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#
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# (1) If the ORDER BY term is an integer constant i, then
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# sort by the i-th column of the result set.
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#
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# (2) If the ORDER BY term is an identifier (not x.y or x.y.z
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# but simply x) then look for a column alias with the same
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# name. If found, then sort by that column.
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#
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# (3) Evaluate the term as an expression and sort by the
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# value of the expression.
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#
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# For a compound SELECT the rules are modified slightly.
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# In the third rule, the expression must exactly match one
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# of the result columns. The sequences of three rules is
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# attempted first on the left-most SELECT. If that doesn't
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# work, we move to the right, one by one.
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#
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# Rule (3) is not in standard SQL - it is an SQLite extension,
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# though one copied from PostgreSQL. The rule for compound
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# queries where a search is made of SELECTs to the right
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# if the left-most SELECT does not match is not a part of
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# standard SQL either. This extension is unique to SQLite
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# as far as we know.
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#
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# Rule (2) was added by the changes ticket #2822. Prior to
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# that changes, SQLite did not support rule (2), making it
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# technically in violation of standard SQL semantics.
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# No body noticed because rule (3) has the same effect as
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# rule (2) except in some obscure cases.
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#
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# Test plan:
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#
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# tkt2822-1.* - Simple identifier as ORDER BY expression.
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# tkt2822-2.* - More complex ORDER BY expressions.
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do_test tkt2822-0.1 {
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execsql {
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CREATE TABLE t1(a, b, c);
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CREATE TABLE t2(a, b, c);
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INSERT INTO t1 VALUES(1, 3, 9);
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INSERT INTO t1 VALUES(3, 9, 27);
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INSERT INTO t1 VALUES(5, 15, 45);
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INSERT INTO t2 VALUES(2, 6, 18);
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INSERT INTO t2 VALUES(4, 12, 36);
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INSERT INTO t2 VALUES(6, 18, 54);
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}
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} {}
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# Test the "ORDER BY <integer>" syntax.
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#
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do_test tkt2822-1.1 {
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execsql {
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SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY 1;
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}
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} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
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do_test tkt2822-1.2 {
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execsql {
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SELECT a, CAST (b AS TEXT), c FROM t1
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UNION ALL
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SELECT a, b, c FROM t2
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ORDER BY 2;
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}
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} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
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# Test the "ORDER BY <identifier>" syntax.
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#
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do_test tkt2822-2.1 {
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execsql {
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SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY a;
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}
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} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
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do_test tkt2822-2.2 {
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execsql {
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SELECT a, CAST (b AS TEXT) AS x, c FROM t1
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UNION ALL
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SELECT a, b, c FROM t2
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ORDER BY x;
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}
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} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
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do_test tkt2822-2.3 {
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execsql {
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SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY a;
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}
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} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
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# Test the "ORDER BY <expression>" syntax.
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#
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do_test tkt2822-3.1 {
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execsql {
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SELECT a, CAST (b AS TEXT) AS x, c FROM t1
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UNION ALL
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SELECT a, b, c FROM t2
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ORDER BY CAST (b AS TEXT);
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}
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} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
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do_test tkt2822-3.2 {
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execsql {
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SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY t1.a;
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}
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} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
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# Test that if a match cannot be found in the leftmost SELECT, an
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# attempt is made to find a match in subsequent SELECT statements.
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#
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do_test tkt2822-3.3 {
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execsql {
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SELECT a, b, c FROM t1 UNION ALL SELECT a AS x, b, c FROM t2 ORDER BY x;
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}
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} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
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do_test tkt2822-3.4 {
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# But the leftmost SELECT takes precedence.
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execsql {
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SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1
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UNION ALL
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SELECT a, b, c FROM t2
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ORDER BY a;
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}
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} {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
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do_test tkt2822-3.5 {
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execsql {
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SELECT a, b, c FROM t2
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UNION ALL
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SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1
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ORDER BY a;
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}
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} {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
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# Test some error conditions (ORDER BY clauses that match no column).
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#
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do_test tkt2822-4.1 {
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catchsql {
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SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY x
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}
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} {1 {1st ORDER BY term does not match any column in the result set}}
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do_test tkt2822-4.2 {
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catchsql {
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SELECT a, CAST (b AS TEXT) AS x, c FROM t1
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UNION ALL
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SELECT a, b, c FROM t2
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ORDER BY CAST (b AS INTEGER);
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}
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} {1 {1st ORDER BY term does not match any column in the result set}}
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# Tests for rule (2).
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#
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# The "ORDER BY b" should match the column alias (rule 2), not the
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# the t3.b value (rule 3).
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#
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do_test tkt2822-5.1 {
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execsql {
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CREATE TABLE t3(a,b);
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INSERT INTO t3 VALUES(1,8);
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INSERT INTO t3 VALUES(9,2);
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SELECT a AS b FROM t3 ORDER BY b;
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}
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} {1 9}
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do_test tkt2822-5.2 {
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# Case does not matter. b should match B
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execsql {
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SELECT a AS b FROM t3 ORDER BY B;
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}
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} {1 9}
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do_test tkt2822-5.3 {
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# Quoting should not matter
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execsql {
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SELECT a AS 'b' FROM t3 ORDER BY "B";
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}
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} {1 9}
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do_test tkt2822-5.4 {
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# Quoting should not matter
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execsql {
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SELECT a AS "b" FROM t3 ORDER BY [B];
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}
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} {1 9}
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# In "ORDER BY +b" the term is now an expression rather than
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# a label. It therefore matches by rule (3) instead of rule (2).
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#
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do_test tkt2822-5.5 {
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execsql {
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SELECT a AS b FROM t3 ORDER BY +b;
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}
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} {9 1}
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# Tests for rule 2 in compound queries
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#
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do_test tkt2822-6.1 {
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execsql {
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CREATE TABLE t6a(p,q);
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INSERT INTO t6a VALUES(1,8);
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INSERT INTO t6a VALUES(9,2);
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CREATE TABLE t6b(x,y);
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INSERT INTO t6b VALUES(1,7);
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INSERT INTO t6b VALUES(7,2);
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SELECT p, q FROM t6a UNION ALL SELECT x, y FROM t6b ORDER BY 1, 2
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}
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} {1 7 1 8 7 2 9 2}
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do_test tkt2822-6.2 {
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execsql {
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SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
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ORDER BY PX, YX
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}
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} {1 7 1 8 7 2 9 2}
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do_test tkt2822-6.3 {
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execsql {
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SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
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ORDER BY XX, QX
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}
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} {1 7 1 8 7 2 9 2}
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do_test tkt2822-6.4 {
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execsql {
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SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
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ORDER BY QX, XX
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}
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} {7 2 9 2 1 7 1 8}
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do_test tkt2822-6.5 {
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execsql {
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SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
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ORDER BY t6b.x, QX
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}
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} {1 7 1 8 7 2 9 2}
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do_test tkt2822-6.6 {
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execsql {
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SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
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ORDER BY t6a.q, XX
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}
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} {7 2 9 2 1 7 1 8}
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# More error message tests. This is really more of a test of the
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# %r ordinal value formatting capablity added to sqlite3_snprintf()
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# by ticket #2822.
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#
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do_test tkt2822-7.1 {
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execsql {
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CREATE TABLE t7(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,
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a15,a16,a17,a18,a19,a20,a21,a22,a23,a24,a25);
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}
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catchsql {
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SELECT * FROM t7 ORDER BY 0;
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}
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} {1 {1st ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.2.1 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 0;
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}
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} {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.2.2 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 26;
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}
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} {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.2.3 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 65536;
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}
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} {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.3 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 0;
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}
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} {1 {3rd ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.4 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 0;
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}
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} {1 {4th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.9 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 0;
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}
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} {1 {9th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.10 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 0;
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}
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} {1 {10th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.11 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0;
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}
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} {1 {11th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.12 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 0;
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}
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} {1 {12th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.13 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 0;
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}
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} {1 {13th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.20 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
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11,12,13,14,15,16,17,18,19, 0
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}
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} {1 {20th ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.21 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
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11,12,13,14,15,16,17,18,19, 20, 0
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}
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} {1 {21st ORDER BY term out of range - should be between 1 and 25}}
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do_test tkt2822-7.22 {
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catchsql {
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SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
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11,12,13,14,15,16,17,18,19, 20, 21, 0
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}
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} {1 {22nd ORDER BY term out of range - should be between 1 and 25}}
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finish_test
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