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 #***********************************************************************
12 # This file is to test that the issues surrounding expressions in
13 # ORDER BY clauses on compound SELECT statements raised by ticket
14 # #2822 have been dealt with.
16 # $Id: tkt2822.test,v 1.6 2008/08/20 16:35:10 drh Exp $
19 set testdir [file dirname $argv0]
20 source $testdir/tester.tcl
27 # The ORDER BY matching algorithm is three steps:
29 # (1) If the ORDER BY term is an integer constant i, then
30 # sort by the i-th column of the result set.
32 # (2) If the ORDER BY term is an identifier (not x.y or x.y.z
33 # but simply x) then look for a column alias with the same
34 # name. If found, then sort by that column.
36 # (3) Evaluate the term as an expression and sort by the
37 # value of the expression.
39 # For a compound SELECT the rules are modified slightly.
40 # In the third rule, the expression must exactly match one
41 # of the result columns. The sequences of three rules is
42 # attempted first on the left-most SELECT. If that doesn't
43 # work, we move to the right, one by one.
45 # Rule (3) is not in standard SQL - it is an SQLite extension,
46 # though one copied from PostgreSQL. The rule for compound
47 # queries where a search is made of SELECTs to the right
48 # if the left-most SELECT does not match is not a part of
49 # standard SQL either. This extension is unique to SQLite
52 # Rule (2) was added by the changes ticket #2822. Prior to
53 # that changes, SQLite did not support rule (2), making it
54 # technically in violation of standard SQL semantics.
55 # No body noticed because rule (3) has the same effect as
56 # rule (2) except in some obscure cases.
62 # tkt2822-1.* - Simple identifier as ORDER BY expression.
63 # tkt2822-2.* - More complex ORDER BY expressions.
67 CREATE TABLE t1(a, b, c);
68 CREATE TABLE t2(a, b, c);
70 INSERT INTO t1 VALUES(1, 3, 9);
71 INSERT INTO t1 VALUES(3, 9, 27);
72 INSERT INTO t1 VALUES(5, 15, 45);
74 INSERT INTO t2 VALUES(2, 6, 18);
75 INSERT INTO t2 VALUES(4, 12, 36);
76 INSERT INTO t2 VALUES(6, 18, 54);
80 # Test the "ORDER BY <integer>" syntax.
84 SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY 1;
86 } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
89 SELECT a, CAST (b AS TEXT), c FROM t1
91 SELECT a, b, c FROM t2
94 } {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
96 # Test the "ORDER BY <identifier>" syntax.
100 SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY a;
102 } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
104 do_test tkt2822-2.2 {
106 SELECT a, CAST (b AS TEXT) AS x, c FROM t1
108 SELECT a, b, c FROM t2
111 } {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
112 do_test tkt2822-2.3 {
114 SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY a;
116 } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
118 # Test the "ORDER BY <expression>" syntax.
120 do_test tkt2822-3.1 {
122 SELECT a, CAST (b AS TEXT) AS x, c FROM t1
124 SELECT a, b, c FROM t2
125 ORDER BY CAST (b AS TEXT);
127 } {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
128 do_test tkt2822-3.2 {
130 SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY t1.a;
132 } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
134 # Test that if a match cannot be found in the leftmost SELECT, an
135 # attempt is made to find a match in subsequent SELECT statements.
137 do_test tkt2822-3.3 {
139 SELECT a, b, c FROM t1 UNION ALL SELECT a AS x, b, c FROM t2 ORDER BY x;
141 } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
142 do_test tkt2822-3.4 {
143 # But the leftmost SELECT takes precedence.
145 SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1
147 SELECT a, b, c FROM t2
150 } {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
151 do_test tkt2822-3.5 {
153 SELECT a, b, c FROM t2
155 SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1
158 } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
160 # Test some error conditions (ORDER BY clauses that match no column).
162 do_test tkt2822-4.1 {
164 SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY x
166 } {1 {1st ORDER BY term does not match any column in the result set}}
167 do_test tkt2822-4.2 {
169 SELECT a, CAST (b AS TEXT) AS x, c FROM t1
171 SELECT a, b, c FROM t2
172 ORDER BY CAST (b AS INTEGER);
174 } {1 {1st ORDER BY term does not match any column in the result set}}
176 # Tests for rule (2).
178 # The "ORDER BY b" should match the column alias (rule 2), not the
179 # the t3.b value (rule 3).
181 do_test tkt2822-5.1 {
183 CREATE TABLE t3(a,b);
184 INSERT INTO t3 VALUES(1,8);
185 INSERT INTO t3 VALUES(9,2);
187 SELECT a AS b FROM t3 ORDER BY b;
190 do_test tkt2822-5.2 {
191 # Case does not matter. b should match B
193 SELECT a AS b FROM t3 ORDER BY B;
196 do_test tkt2822-5.3 {
197 # Quoting should not matter
199 SELECT a AS 'b' FROM t3 ORDER BY "B";
202 do_test tkt2822-5.4 {
203 # Quoting should not matter
205 SELECT a AS "b" FROM t3 ORDER BY [B];
209 # In "ORDER BY +b" the term is now an expression rather than
210 # a label. It therefore matches by rule (3) instead of rule (2).
212 do_test tkt2822-5.5 {
214 SELECT a AS b FROM t3 ORDER BY +b;
218 # Tests for rule 2 in compound queries
220 do_test tkt2822-6.1 {
222 CREATE TABLE t6a(p,q);
223 INSERT INTO t6a VALUES(1,8);
224 INSERT INTO t6a VALUES(9,2);
225 CREATE TABLE t6b(x,y);
226 INSERT INTO t6b VALUES(1,7);
227 INSERT INTO t6b VALUES(7,2);
229 SELECT p, q FROM t6a UNION ALL SELECT x, y FROM t6b ORDER BY 1, 2
232 do_test tkt2822-6.2 {
234 SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
238 do_test tkt2822-6.3 {
240 SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
244 do_test tkt2822-6.4 {
246 SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
250 do_test tkt2822-6.5 {
252 SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
256 do_test tkt2822-6.6 {
258 SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
263 # More error message tests. This is really more of a test of the
264 # %r ordinal value formatting capablity added to sqlite3_snprintf()
267 do_test tkt2822-7.1 {
269 CREATE TABLE t7(a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,
270 a15,a16,a17,a18,a19,a20,a21,a22,a23,a24,a25);
273 SELECT * FROM t7 ORDER BY 0;
275 } {1 {1st ORDER BY term out of range - should be between 1 and 25}}
276 do_test tkt2822-7.2.1 {
278 SELECT * FROM t7 ORDER BY 1, 0;
280 } {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
281 do_test tkt2822-7.2.2 {
283 SELECT * FROM t7 ORDER BY 1, 26;
285 } {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
286 do_test tkt2822-7.2.3 {
288 SELECT * FROM t7 ORDER BY 1, 65536;
290 } {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
291 do_test tkt2822-7.3 {
293 SELECT * FROM t7 ORDER BY 1, 2, 0;
295 } {1 {3rd ORDER BY term out of range - should be between 1 and 25}}
296 do_test tkt2822-7.4 {
298 SELECT * FROM t7 ORDER BY 1, 2, 3, 0;
300 } {1 {4th ORDER BY term out of range - should be between 1 and 25}}
301 do_test tkt2822-7.9 {
303 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 0;
305 } {1 {9th ORDER BY term out of range - should be between 1 and 25}}
306 do_test tkt2822-7.10 {
308 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 0;
310 } {1 {10th ORDER BY term out of range - should be between 1 and 25}}
311 do_test tkt2822-7.11 {
313 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0;
315 } {1 {11th ORDER BY term out of range - should be between 1 and 25}}
316 do_test tkt2822-7.12 {
318 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 0;
320 } {1 {12th ORDER BY term out of range - should be between 1 and 25}}
321 do_test tkt2822-7.13 {
323 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 0;
325 } {1 {13th ORDER BY term out of range - should be between 1 and 25}}
326 do_test tkt2822-7.20 {
328 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
329 11,12,13,14,15,16,17,18,19, 0
331 } {1 {20th ORDER BY term out of range - should be between 1 and 25}}
332 do_test tkt2822-7.21 {
334 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
335 11,12,13,14,15,16,17,18,19, 20, 0
337 } {1 {21st ORDER BY term out of range - should be between 1 and 25}}
338 do_test tkt2822-7.22 {
340 SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
341 11,12,13,14,15,16,17,18,19, 20, 21, 0
343 } {1 {22nd ORDER BY term out of range - should be between 1 and 25}}