1: # 2007 Dec 4
2: #
3: # The author disclaims copyright to this source code. In place of
4: # a legal notice, here is a blessing:
5: #
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.
9: #
10: #***********************************************************************
11: #
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.
15: #
16: # $Id: tkt2822.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $
17: #
18:
19: set testdir [file dirname $argv0]
20: source $testdir/tester.tcl
21:
22: ifcapable !compound {
23: finish_test
24: return
25: }
26:
27: # The ORDER BY matching algorithm is three steps:
28: #
29: # (1) If the ORDER BY term is an integer constant i, then
30: # sort by the i-th column of the result set.
31: #
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.
35: #
36: # (3) Evaluate the term as an expression and sort by the
37: # value of the expression.
38: #
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.
44: #
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
50: # as far as we know.
51: #
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.
57: #
58:
59:
60: # Test plan:
61: #
62: # tkt2822-1.* - Simple identifier as ORDER BY expression.
63: # tkt2822-2.* - More complex ORDER BY expressions.
64:
65: do_test tkt2822-0.1 {
66: execsql {
67: CREATE TABLE t1(a, b, c);
68: CREATE TABLE t2(a, b, c);
69:
70: INSERT INTO t1 VALUES(1, 3, 9);
71: INSERT INTO t1 VALUES(3, 9, 27);
72: INSERT INTO t1 VALUES(5, 15, 45);
73:
74: INSERT INTO t2 VALUES(2, 6, 18);
75: INSERT INTO t2 VALUES(4, 12, 36);
76: INSERT INTO t2 VALUES(6, 18, 54);
77: }
78: } {}
79:
80: # Test the "ORDER BY <integer>" syntax.
81: #
82: do_test tkt2822-1.1 {
83: execsql {
84: SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY 1;
85: }
86: } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
87: do_test tkt2822-1.2 {
88: execsql {
89: SELECT a, CAST (b AS TEXT), c FROM t1
90: UNION ALL
91: SELECT a, b, c FROM t2
92: ORDER BY 2;
93: }
94: } {2 6 18 4 12 36 6 18 54 5 15 45 1 3 9 3 9 27}
95:
96: # Test the "ORDER BY <identifier>" syntax.
97: #
98: do_test tkt2822-2.1 {
99: execsql {
100: SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY a;
101: }
102: } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
103:
104: do_test tkt2822-2.2 {
105: execsql {
106: SELECT a, CAST (b AS TEXT) AS x, c FROM t1
107: UNION ALL
108: SELECT a, b, c FROM t2
109: ORDER BY x;
110: }
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 {
113: execsql {
114: SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY a;
115: }
116: } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
117:
118: # Test the "ORDER BY <expression>" syntax.
119: #
120: do_test tkt2822-3.1 {
121: execsql {
122: SELECT a, CAST (b AS TEXT) AS x, c FROM t1
123: UNION ALL
124: SELECT a, b, c FROM t2
125: ORDER BY CAST (b AS TEXT);
126: }
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 {
129: execsql {
130: SELECT t1.a, b, c FROM t1 UNION ALL SELECT t2.a, b, c FROM t2 ORDER BY t1.a;
131: }
132: } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
133:
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.
136: #
137: do_test tkt2822-3.3 {
138: execsql {
139: SELECT a, b, c FROM t1 UNION ALL SELECT a AS x, b, c FROM t2 ORDER BY x;
140: }
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.
144: execsql {
145: SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1
146: UNION ALL
147: SELECT a, b, c FROM t2
148: ORDER BY a;
149: }
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 {
152: execsql {
153: SELECT a, b, c FROM t2
154: UNION ALL
155: SELECT a AS b, CAST (b AS TEXT) AS a, c FROM t1
156: ORDER BY a;
157: }
158: } {1 3 9 2 6 18 3 9 27 4 12 36 5 15 45 6 18 54}
159:
160: # Test some error conditions (ORDER BY clauses that match no column).
161: #
162: do_test tkt2822-4.1 {
163: catchsql {
164: SELECT a, b, c FROM t1 UNION ALL SELECT a, b, c FROM t2 ORDER BY x
165: }
166: } {1 {1st ORDER BY term does not match any column in the result set}}
167: do_test tkt2822-4.2 {
168: catchsql {
169: SELECT a, CAST (b AS TEXT) AS x, c FROM t1
170: UNION ALL
171: SELECT a, b, c FROM t2
172: ORDER BY CAST (b AS INTEGER);
173: }
174: } {1 {1st ORDER BY term does not match any column in the result set}}
175:
176: # Tests for rule (2).
177: #
178: # The "ORDER BY b" should match the column alias (rule 2), not the
179: # the t3.b value (rule 3).
180: #
181: do_test tkt2822-5.1 {
182: execsql {
183: CREATE TABLE t3(a,b);
184: INSERT INTO t3 VALUES(1,8);
185: INSERT INTO t3 VALUES(9,2);
186:
187: SELECT a AS b FROM t3 ORDER BY b;
188: }
189: } {1 9}
190: do_test tkt2822-5.2 {
191: # Case does not matter. b should match B
192: execsql {
193: SELECT a AS b FROM t3 ORDER BY B;
194: }
195: } {1 9}
196: do_test tkt2822-5.3 {
197: # Quoting should not matter
198: execsql {
199: SELECT a AS 'b' FROM t3 ORDER BY "B";
200: }
201: } {1 9}
202: do_test tkt2822-5.4 {
203: # Quoting should not matter
204: execsql {
205: SELECT a AS "b" FROM t3 ORDER BY [B];
206: }
207: } {1 9}
208:
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).
211: #
212: do_test tkt2822-5.5 {
213: execsql {
214: SELECT a AS b FROM t3 ORDER BY +b;
215: }
216: } {9 1}
217:
218: # Tests for rule 2 in compound queries
219: #
220: do_test tkt2822-6.1 {
221: execsql {
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);
228:
229: SELECT p, q FROM t6a UNION ALL SELECT x, y FROM t6b ORDER BY 1, 2
230: }
231: } {1 7 1 8 7 2 9 2}
232: do_test tkt2822-6.2 {
233: execsql {
234: SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
235: ORDER BY PX, YX
236: }
237: } {1 7 1 8 7 2 9 2}
238: do_test tkt2822-6.3 {
239: execsql {
240: SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
241: ORDER BY XX, QX
242: }
243: } {1 7 1 8 7 2 9 2}
244: do_test tkt2822-6.4 {
245: execsql {
246: SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
247: ORDER BY QX, XX
248: }
249: } {7 2 9 2 1 7 1 8}
250: do_test tkt2822-6.5 {
251: execsql {
252: SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
253: ORDER BY t6b.x, QX
254: }
255: } {1 7 1 8 7 2 9 2}
256: do_test tkt2822-6.6 {
257: execsql {
258: SELECT p PX, q QX FROM t6a UNION ALL SELECT x XX, y YX FROM t6b
259: ORDER BY t6a.q, XX
260: }
261: } {7 2 9 2 1 7 1 8}
262:
263: # More error message tests. This is really more of a test of the
264: # %r ordinal value formatting capablity added to sqlite3_snprintf()
265: # by ticket #2822.
266: #
267: do_test tkt2822-7.1 {
268: execsql {
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);
271: }
272: catchsql {
273: SELECT * FROM t7 ORDER BY 0;
274: }
275: } {1 {1st ORDER BY term out of range - should be between 1 and 25}}
276: do_test tkt2822-7.2 {
277: catchsql {
278: SELECT * FROM t7 ORDER BY 1, 0;
279: }
280: } {1 {2nd ORDER BY term out of range - should be between 1 and 25}}
281: do_test tkt2822-7.3 {
282: catchsql {
283: SELECT * FROM t7 ORDER BY 1, 2, 0;
284: }
285: } {1 {3rd ORDER BY term out of range - should be between 1 and 25}}
286: do_test tkt2822-7.4 {
287: catchsql {
288: SELECT * FROM t7 ORDER BY 1, 2, 3, 0;
289: }
290: } {1 {4th ORDER BY term out of range - should be between 1 and 25}}
291: do_test tkt2822-7.9 {
292: catchsql {
293: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 0;
294: }
295: } {1 {9th ORDER BY term out of range - should be between 1 and 25}}
296: do_test tkt2822-7.10 {
297: catchsql {
298: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 0;
299: }
300: } {1 {10th ORDER BY term out of range - should be between 1 and 25}}
301: do_test tkt2822-7.11 {
302: catchsql {
303: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0;
304: }
305: } {1 {11th ORDER BY term out of range - should be between 1 and 25}}
306: do_test tkt2822-7.12 {
307: catchsql {
308: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 0;
309: }
310: } {1 {12th ORDER BY term out of range - should be between 1 and 25}}
311: do_test tkt2822-7.13 {
312: catchsql {
313: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 0;
314: }
315: } {1 {13th ORDER BY term out of range - should be between 1 and 25}}
316: do_test tkt2822-7.20 {
317: catchsql {
318: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
319: 11,12,13,14,15,16,17,18,19, 0
320: }
321: } {1 {20th ORDER BY term out of range - should be between 1 and 25}}
322: do_test tkt2822-7.21 {
323: catchsql {
324: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
325: 11,12,13,14,15,16,17,18,19, 20, 0
326: }
327: } {1 {21st ORDER BY term out of range - should be between 1 and 25}}
328: do_test tkt2822-7.22 {
329: catchsql {
330: SELECT * FROM t7 ORDER BY 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
331: 11,12,13,14,15,16,17,18,19, 20, 21, 0
332: }
333: } {1 {22nd ORDER BY term out of range - should be between 1 and 25}}
334:
335:
336: finish_test
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