1: # 2010 July 16
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 implements tests to verify that the "testable statements" in
13: # the lang_expr.html document are correct.
14: #
15:
16: set testdir [file dirname $argv0]
17: source $testdir/tester.tcl
18: source $testdir/malloc_common.tcl
19:
20:
21: proc do_expr_test {tn expr type value} {
22: uplevel do_execsql_test $tn [list "SELECT typeof($expr), $expr"] [
23: list [list $type $value]
24: ]
25: }
26:
27: proc do_qexpr_test {tn expr value} {
28: uplevel do_execsql_test $tn [list "SELECT quote($expr)"] [list $value]
29: }
30:
31: # Set up three global variables:
32: #
33: # ::opname An array mapping from SQL operator to an easy to parse
34: # name. The names are used as part of test case names.
35: #
36: # ::opprec An array mapping from SQL operator to a numeric
37: # precedence value. Operators that group more tightly
38: # have lower numeric precedences.
39: #
40: # ::oplist A list of all SQL operators supported by SQLite.
41: #
42: foreach {op opn} {
43: || cat * mul / div % mod + add
44: - sub << lshift >> rshift & bitand | bitor
45: < less <= lesseq > more >= moreeq = eq1
46: == eq2 <> ne1 != ne2 IS is LIKE like
47: GLOB glob AND and OR or MATCH match REGEXP regexp
48: {IS NOT} isnt
49: } {
50: set ::opname($op) $opn
51: }
52: set oplist [list]
53: foreach {prec opl} {
54: 1 ||
55: 2 {* / %}
56: 3 {+ -}
57: 4 {<< >> & |}
58: 5 {< <= > >=}
59: 6 {= == != <> IS {IS NOT} LIKE GLOB MATCH REGEXP}
60: 7 AND
61: 8 OR
62: } {
63: foreach op $opl {
64: set ::opprec($op) $prec
65: lappend oplist $op
66: }
67: }
68:
69:
70: # Hook in definitions of MATCH and REGEX. The following implementations
71: # cause MATCH and REGEX to behave similarly to the == operator.
72: #
73: proc matchfunc {a b} { return [expr {$a==$b}] }
74: proc regexfunc {a b} { return [expr {$a==$b}] }
75: db func match -argcount 2 matchfunc
76: db func regexp -argcount 2 regexfunc
77:
78: #-------------------------------------------------------------------------
79: # Test cases e_expr-1.* attempt to verify that all binary operators listed
80: # in the documentation exist and that the relative precedences of the
81: # operators are also as the documentation suggests.
82: #
83: # EVIDENCE-OF: R-15514-65163 SQLite understands the following binary
84: # operators, in order from highest to lowest precedence: || * / % + -
85: # << >> & | < <= > >= = == != <> IS IS
86: # NOT IN LIKE GLOB MATCH REGEXP AND OR
87: #
88: # EVIDENCE-OF: R-38759-38789 Operators IS and IS NOT have the same
89: # precedence as =.
90: #
91:
92: unset -nocomplain untested
93: foreach op1 $oplist {
94: foreach op2 $oplist {
95: set untested($op1,$op2) 1
96: foreach {tn A B C} {
97: 1 22 45 66
98: 2 0 0 0
99: 3 0 0 1
100: 4 0 1 0
101: 5 0 1 1
102: 6 1 0 0
103: 7 1 0 1
104: 8 1 1 0
105: 9 1 1 1
106: 10 5 6 1
107: 11 1 5 6
108: 12 1 5 5
109: 13 5 5 1
110:
111: 14 5 2 1
112: 15 1 4 1
113: 16 -1 0 1
114: 17 0 1 -1
115:
116: } {
117: set testname "e_expr-1.$opname($op1).$opname($op2).$tn"
118:
119: # If $op2 groups more tightly than $op1, then the result
120: # of executing $sql1 whould be the same as executing $sql3.
121: # If $op1 groups more tightly, or if $op1 and $op2 have
122: # the same precedence, then executing $sql1 should return
123: # the same value as $sql2.
124: #
125: set sql1 "SELECT $A $op1 $B $op2 $C"
126: set sql2 "SELECT ($A $op1 $B) $op2 $C"
127: set sql3 "SELECT $A $op1 ($B $op2 $C)"
128:
129: set a2 [db one $sql2]
130: set a3 [db one $sql3]
131:
132: do_execsql_test $testname $sql1 [list [
133: if {$opprec($op2) < $opprec($op1)} {set a3} {set a2}
134: ]]
135: if {$a2 != $a3} { unset -nocomplain untested($op1,$op2) }
136: }
137: }
138: }
139:
140: foreach op {* AND OR + || & |} { unset untested($op,$op) }
141: unset untested(+,-) ;# Since (a+b)-c == a+(b-c)
142: unset untested(*,<<) ;# Since (a*b)<<c == a*(b<<c)
143:
144: do_test e_expr-1.1 { array names untested } {}
145:
146: # At one point, test 1.2.2 was failing. Instead of the correct result, it
147: # was returning {1 1 0}. This would seem to indicate that LIKE has the
148: # same precedence as '<'. Which is incorrect. It has lower precedence.
149: #
150: do_execsql_test e_expr-1.2.1 {
151: SELECT 0 < 2 LIKE 1, (0 < 2) LIKE 1, 0 < (2 LIKE 1)
152: } {1 1 0}
153: do_execsql_test e_expr-1.2.2 {
154: SELECT 0 LIKE 0 < 2, (0 LIKE 0) < 2, 0 LIKE (0 < 2)
155: } {0 1 0}
156:
157: # Showing that LIKE and == have the same precedence
158: #
159: do_execsql_test e_expr-1.2.3 {
160: SELECT 2 LIKE 2 == 1, (2 LIKE 2) == 1, 2 LIKE (2 == 1)
161: } {1 1 0}
162: do_execsql_test e_expr-1.2.4 {
163: SELECT 2 == 2 LIKE 1, (2 == 2) LIKE 1, 2 == (2 LIKE 1)
164: } {1 1 0}
165:
166: # Showing that < groups more tightly than == (< has higher precedence).
167: #
168: do_execsql_test e_expr-1.2.5 {
169: SELECT 0 < 2 == 1, (0 < 2) == 1, 0 < (2 == 1)
170: } {1 1 0}
171: do_execsql_test e_expr-1.6 {
172: SELECT 0 == 0 < 2, (0 == 0) < 2, 0 == (0 < 2)
173: } {0 1 0}
174:
175: #-------------------------------------------------------------------------
176: # Check that the four unary prefix operators mentioned in the
177: # documentation exist.
178: #
179: # EVIDENCE-OF: R-13958-53419 Supported unary prefix operators are these:
180: # - + ~ NOT
181: #
182: do_execsql_test e_expr-2.1 { SELECT - 10 } {-10}
183: do_execsql_test e_expr-2.2 { SELECT + 10 } {10}
184: do_execsql_test e_expr-2.3 { SELECT ~ 10 } {-11}
185: do_execsql_test e_expr-2.4 { SELECT NOT 10 } {0}
186:
187: #-------------------------------------------------------------------------
188: # Tests for the two statements made regarding the unary + operator.
189: #
190: # EVIDENCE-OF: R-53670-03373 The unary operator + is a no-op.
191: #
192: # EVIDENCE-OF: R-19480-30968 It can be applied to strings, numbers,
193: # blobs or NULL and it always returns a result with the same value as
194: # the operand.
195: #
196: foreach {tn literal type} {
197: 1 'helloworld' text
198: 2 45 integer
199: 3 45.2 real
200: 4 45.0 real
201: 5 X'ABCDEF' blob
202: 6 NULL null
203: } {
204: set sql " SELECT quote( + $literal ), typeof( + $literal) "
205: do_execsql_test e_expr-3.$tn $sql [list $literal $type]
206: }
207:
208: #-------------------------------------------------------------------------
209: # Check that both = and == are both acceptable as the "equals" operator.
210: # Similarly, either != or <> work as the not-equals operator.
211: #
212: # EVIDENCE-OF: R-03679-60639 Equals can be either = or ==.
213: #
214: # EVIDENCE-OF: R-30082-38996 The non-equals operator can be either != or
215: # <>.
216: #
217: foreach {tn literal different} {
218: 1 'helloworld' '12345'
219: 2 22 23
220: 3 'xyz' X'78797A'
221: 4 X'78797A00' 'xyz'
222: } {
223: do_execsql_test e_expr-4.$tn "
224: SELECT $literal = $literal, $literal == $literal,
225: $literal = $different, $literal == $different,
226: $literal = NULL, $literal == NULL,
227: $literal != $literal, $literal <> $literal,
228: $literal != $different, $literal <> $different,
229: $literal != NULL, $literal != NULL
230:
231: " {1 1 0 0 {} {} 0 0 1 1 {} {}}
232: }
233:
234: #-------------------------------------------------------------------------
235: # Test the || operator.
236: #
237: # EVIDENCE-OF: R-44409-62641 The || operator is "concatenate" - it joins
238: # together the two strings of its operands.
239: #
240: foreach {tn a b} {
241: 1 'helloworld' '12345'
242: 2 22 23
243: } {
244: set as [db one "SELECT $a"]
245: set bs [db one "SELECT $b"]
246:
247: do_execsql_test e_expr-5.$tn "SELECT $a || $b" [list "${as}${bs}"]
248: }
249:
250: #-------------------------------------------------------------------------
251: # Test the % operator.
252: #
253: # EVIDENCE-OF: R-08914-63790 The operator % outputs the value of its
254: # left operand modulo its right operand.
255: #
256: do_execsql_test e_expr-6.1 {SELECT 72%5} {2}
257: do_execsql_test e_expr-6.2 {SELECT 72%-5} {2}
258: do_execsql_test e_expr-6.3 {SELECT -72%-5} {-2}
259: do_execsql_test e_expr-6.4 {SELECT -72%5} {-2}
260:
261: #-------------------------------------------------------------------------
262: # Test that the results of all binary operators are either numeric or
263: # NULL, except for the || operator, which may evaluate to either a text
264: # value or NULL.
265: #
266: # EVIDENCE-OF: R-20665-17792 The result of any binary operator is either
267: # a numeric value or NULL, except for the || concatenation operator
268: # which always evaluates to either NULL or a text value.
269: #
270: set literals {
271: 1 'abc' 2 'hexadecimal' 3 ''
272: 4 123 5 -123 6 0
273: 7 123.4 8 0.0 9 -123.4
274: 10 X'ABCDEF' 11 X'' 12 X'0000'
275: 13 NULL
276: }
277: foreach op $oplist {
278: foreach {n1 rhs} $literals {
279: foreach {n2 lhs} $literals {
280:
281: set t [db one " SELECT typeof($lhs $op $rhs) "]
282: do_test e_expr-7.$opname($op).$n1.$n2 {
283: expr {
284: ($op=="||" && ($t == "text" || $t == "null"))
285: || ($op!="||" && ($t == "integer" || $t == "real" || $t == "null"))
286: }
287: } 1
288:
289: }}
290: }
291:
292: #-------------------------------------------------------------------------
293: # Test the IS and IS NOT operators.
294: #
295: # EVIDENCE-OF: R-24731-45773 The IS and IS NOT operators work like = and
296: # != except when one or both of the operands are NULL.
297: #
298: # EVIDENCE-OF: R-06325-15315 In this case, if both operands are NULL,
299: # then the IS operator evaluates to 1 (true) and the IS NOT operator
300: # evaluates to 0 (false).
301: #
302: # EVIDENCE-OF: R-19812-36779 If one operand is NULL and the other is
303: # not, then the IS operator evaluates to 0 (false) and the IS NOT
304: # operator is 1 (true).
305: #
306: # EVIDENCE-OF: R-61975-13410 It is not possible for an IS or IS NOT
307: # expression to evaluate to NULL.
308: #
309: do_execsql_test e_expr-8.1.1 { SELECT NULL IS NULL } {1}
310: do_execsql_test e_expr-8.1.2 { SELECT 'ab' IS NULL } {0}
311: do_execsql_test e_expr-8.1.3 { SELECT NULL IS 'ab' } {0}
312: do_execsql_test e_expr-8.1.4 { SELECT 'ab' IS 'ab' } {1}
313: do_execsql_test e_expr-8.1.5 { SELECT NULL == NULL } {{}}
314: do_execsql_test e_expr-8.1.6 { SELECT 'ab' == NULL } {{}}
315: do_execsql_test e_expr-8.1.7 { SELECT NULL == 'ab' } {{}}
316: do_execsql_test e_expr-8.1.8 { SELECT 'ab' == 'ab' } {1}
317: do_execsql_test e_expr-8.1.9 { SELECT NULL IS NOT NULL } {0}
318: do_execsql_test e_expr-8.1.10 { SELECT 'ab' IS NOT NULL } {1}
319: do_execsql_test e_expr-8.1.11 { SELECT NULL IS NOT 'ab' } {1}
320: do_execsql_test e_expr-8.1.12 { SELECT 'ab' IS NOT 'ab' } {0}
321: do_execsql_test e_expr-8.1.13 { SELECT NULL != NULL } {{}}
322: do_execsql_test e_expr-8.1.14 { SELECT 'ab' != NULL } {{}}
323: do_execsql_test e_expr-8.1.15 { SELECT NULL != 'ab' } {{}}
324: do_execsql_test e_expr-8.1.16 { SELECT 'ab' != 'ab' } {0}
325:
326: foreach {n1 rhs} $literals {
327: foreach {n2 lhs} $literals {
328: if {$rhs!="NULL" && $lhs!="NULL"} {
329: set eq [execsql "SELECT $lhs = $rhs, $lhs != $rhs"]
330: } else {
331: set eq [list [expr {$lhs=="NULL" && $rhs=="NULL"}] \
332: [expr {$lhs!="NULL" || $rhs!="NULL"}]
333: ]
334: }
335: set test e_expr-8.2.$n1.$n2
336: do_execsql_test $test.1 "SELECT $lhs IS $rhs, $lhs IS NOT $rhs" $eq
337: do_execsql_test $test.2 "
338: SELECT ($lhs IS $rhs) IS NULL, ($lhs IS NOT $rhs) IS NULL
339: " {0 0}
340: }
341: }
342:
343: #-------------------------------------------------------------------------
344: # Run some tests on the COLLATE "unary postfix operator".
345: #
346: # This collation sequence reverses both arguments before using
347: # [string compare] to compare them. For example, when comparing the
348: # strings 'one' and 'four', return the result of:
349: #
350: # string compare eno ruof
351: #
352: proc reverse_str {zStr} {
353: set out ""
354: foreach c [split $zStr {}] { set out "${c}${out}" }
355: set out
356: }
357: proc reverse_collate {zLeft zRight} {
358: string compare [reverse_str $zLeft] [reverse_str $zRight]
359: }
360: db collate reverse reverse_collate
361:
362: # EVIDENCE-OF: R-59577-33471 The COLLATE operator is a unary postfix
363: # operator that assigns a collating sequence to an expression.
364: #
365: # EVIDENCE-OF: R-23441-22541 The COLLATE operator has a higher
366: # precedence (binds more tightly) than any prefix unary operator or any
367: # binary operator.
368: #
369: do_execsql_test e_expr-9.1 { SELECT 'abcd' < 'bbbb' COLLATE reverse } 0
370: do_execsql_test e_expr-9.2 { SELECT ('abcd' < 'bbbb') COLLATE reverse } 1
371: do_execsql_test e_expr-9.3 { SELECT 'abcd' <= 'bbbb' COLLATE reverse } 0
372: do_execsql_test e_expr-9.4 { SELECT ('abcd' <= 'bbbb') COLLATE reverse } 1
373:
374: do_execsql_test e_expr-9.5 { SELECT 'abcd' > 'bbbb' COLLATE reverse } 1
375: do_execsql_test e_expr-9.6 { SELECT ('abcd' > 'bbbb') COLLATE reverse } 0
376: do_execsql_test e_expr-9.7 { SELECT 'abcd' >= 'bbbb' COLLATE reverse } 1
377: do_execsql_test e_expr-9.8 { SELECT ('abcd' >= 'bbbb') COLLATE reverse } 0
378:
379: do_execsql_test e_expr-9.10 { SELECT 'abcd' = 'ABCD' COLLATE nocase } 1
380: do_execsql_test e_expr-9.11 { SELECT ('abcd' = 'ABCD') COLLATE nocase } 0
381: do_execsql_test e_expr-9.12 { SELECT 'abcd' == 'ABCD' COLLATE nocase } 1
382: do_execsql_test e_expr-9.13 { SELECT ('abcd' == 'ABCD') COLLATE nocase } 0
383: do_execsql_test e_expr-9.14 { SELECT 'abcd' IS 'ABCD' COLLATE nocase } 1
384: do_execsql_test e_expr-9.15 { SELECT ('abcd' IS 'ABCD') COLLATE nocase } 0
385:
386: do_execsql_test e_expr-9.16 { SELECT 'abcd' != 'ABCD' COLLATE nocase } 0
387: do_execsql_test e_expr-9.17 { SELECT ('abcd' != 'ABCD') COLLATE nocase } 1
388: do_execsql_test e_expr-9.18 { SELECT 'abcd' <> 'ABCD' COLLATE nocase } 0
389: do_execsql_test e_expr-9.19 { SELECT ('abcd' <> 'ABCD') COLLATE nocase } 1
390: do_execsql_test e_expr-9.20 { SELECT 'abcd' IS NOT 'ABCD' COLLATE nocase } 0
391: do_execsql_test e_expr-9.21 { SELECT ('abcd' IS NOT 'ABCD') COLLATE nocase } 1
392:
393: do_execsql_test e_expr-9.22 {
394: SELECT 'bbb' BETWEEN 'AAA' AND 'CCC' COLLATE nocase
395: } 1
396: do_execsql_test e_expr-9.23 {
397: SELECT ('bbb' BETWEEN 'AAA' AND 'CCC') COLLATE nocase
398: } 0
399:
400: # EVIDENCE-OF: R-58731-25439 The collating sequence set by the COLLATE
401: # operator overrides the collating sequence determined by the COLLATE
402: # clause in a table column definition.
403: #
404: do_execsql_test e_expr-9.24 {
405: CREATE TABLE t24(a COLLATE NOCASE, b);
406: INSERT INTO t24 VALUES('aaa', 1);
407: INSERT INTO t24 VALUES('bbb', 2);
408: INSERT INTO t24 VALUES('ccc', 3);
409: } {}
410: do_execsql_test e_expr-9.25 { SELECT 'BBB' = a FROM t24 } {0 1 0}
411: do_execsql_test e_expr-9.25 { SELECT a = 'BBB' FROM t24 } {0 1 0}
412: do_execsql_test e_expr-9.25 { SELECT 'BBB' = a COLLATE binary FROM t24 } {0 0 0}
413: do_execsql_test e_expr-9.25 { SELECT a COLLATE binary = 'BBB' FROM t24 } {0 0 0}
414:
415: #-------------------------------------------------------------------------
416: # Test statements related to literal values.
417: #
418: # EVIDENCE-OF: R-31536-32008 Literal values may be integers, floating
419: # point numbers, strings, BLOBs, or NULLs.
420: #
421: do_execsql_test e_expr-10.1.1 { SELECT typeof(5) } {integer}
422: do_execsql_test e_expr-10.1.2 { SELECT typeof(5.1) } {real}
423: do_execsql_test e_expr-10.1.3 { SELECT typeof('5.1') } {text}
424: do_execsql_test e_expr-10.1.4 { SELECT typeof(X'ABCD') } {blob}
425: do_execsql_test e_expr-10.1.5 { SELECT typeof(NULL) } {null}
426:
427: # "Scientific notation is supported for point literal values."
428: #
429: do_execsql_test e_expr-10.2.1 { SELECT typeof(3.4e-02) } {real}
430: do_execsql_test e_expr-10.2.2 { SELECT typeof(3e+5) } {real}
431: do_execsql_test e_expr-10.2.3 { SELECT 3.4e-02 } {0.034}
432: do_execsql_test e_expr-10.2.4 { SELECT 3e+4 } {30000.0}
433:
434: # EVIDENCE-OF: R-35229-17830 A string constant is formed by enclosing
435: # the string in single quotes (').
436: #
437: # EVIDENCE-OF: R-07100-06606 A single quote within the string can be
438: # encoded by putting two single quotes in a row - as in Pascal.
439: #
440: do_execsql_test e_expr-10.3.1 { SELECT 'is not' } {{is not}}
441: do_execsql_test e_expr-10.3.2 { SELECT typeof('is not') } {text}
442: do_execsql_test e_expr-10.3.3 { SELECT 'isn''t' } {isn't}
443: do_execsql_test e_expr-10.3.4 { SELECT typeof('isn''t') } {text}
444:
445: # EVIDENCE-OF: R-09593-03321 BLOB literals are string literals
446: # containing hexadecimal data and preceded by a single "x" or "X"
447: # character.
448: #
449: # EVIDENCE-OF: R-39344-59787 For example: X'53514C697465'
450: #
451: do_execsql_test e_expr-10.4.1 { SELECT typeof(X'0123456789ABCDEF') } blob
452: do_execsql_test e_expr-10.4.2 { SELECT typeof(x'0123456789ABCDEF') } blob
453: do_execsql_test e_expr-10.4.3 { SELECT typeof(X'0123456789abcdef') } blob
454: do_execsql_test e_expr-10.4.4 { SELECT typeof(x'0123456789abcdef') } blob
455: do_execsql_test e_expr-10.4.5 { SELECT typeof(X'53514C697465') } blob
456:
457: # EVIDENCE-OF: R-23914-51476 A literal value can also be the token
458: # "NULL".
459: #
460: do_execsql_test e_expr-10.5.1 { SELECT NULL } {{}}
461: do_execsql_test e_expr-10.5.2 { SELECT typeof(NULL) } {null}
462:
463: #-------------------------------------------------------------------------
464: # Test statements related to bound parameters
465: #
466:
467: proc parameter_test {tn sql params result} {
468: set stmt [sqlite3_prepare_v2 db $sql -1]
469:
470: foreach {number name} $params {
471: set nm [sqlite3_bind_parameter_name $stmt $number]
472: do_test $tn.name.$number [list set {} $nm] $name
473: sqlite3_bind_int $stmt $number [expr -1 * $number]
474: }
475:
476: sqlite3_step $stmt
477:
478: set res [list]
479: for {set i 0} {$i < [sqlite3_column_count $stmt]} {incr i} {
480: lappend res [sqlite3_column_text $stmt $i]
481: }
482:
483: set rc [sqlite3_finalize $stmt]
484: do_test $tn.rc [list set {} $rc] SQLITE_OK
485: do_test $tn.res [list set {} $res] $result
486: }
487:
488: # EVIDENCE-OF: R-33509-39458 A question mark followed by a number NNN
489: # holds a spot for the NNN-th parameter. NNN must be between 1 and
490: # SQLITE_MAX_VARIABLE_NUMBER.
491: #
492: set mvn $SQLITE_MAX_VARIABLE_NUMBER
493: parameter_test e_expr-11.1 "
494: SELECT ?1, ?123, ?$SQLITE_MAX_VARIABLE_NUMBER, ?123, ?4
495: " "1 ?1 123 ?123 $mvn ?$mvn 4 ?4" "-1 -123 -$mvn -123 -4"
496:
497: set errmsg "variable number must be between ?1 and ?$SQLITE_MAX_VARIABLE_NUMBER"
498: foreach {tn param_number} [list \
499: 2 0 \
500: 3 [expr $SQLITE_MAX_VARIABLE_NUMBER+1] \
501: 4 [expr $SQLITE_MAX_VARIABLE_NUMBER+2] \
502: 5 12345678903456789034567890234567890 \
503: 6 2147483648 \
504: 7 2147483649 \
505: 8 4294967296 \
506: 9 4294967297 \
507: 10 9223372036854775808 \
508: 11 9223372036854775809 \
509: 12 18446744073709551616 \
510: 13 18446744073709551617 \
511: ] {
512: do_catchsql_test e_expr-11.1.$tn "SELECT ?$param_number" [list 1 $errmsg]
513: }
514:
515: # EVIDENCE-OF: R-33670-36097 A question mark that is not followed by a
516: # number creates a parameter with a number one greater than the largest
517: # parameter number already assigned.
518: #
519: # EVIDENCE-OF: R-42938-07030 If this means the parameter number is
520: # greater than SQLITE_MAX_VARIABLE_NUMBER, it is an error.
521: #
522: parameter_test e_expr-11.2.1 "SELECT ?" {1 {}} -1
523: parameter_test e_expr-11.2.2 "SELECT ?, ?" {1 {} 2 {}} {-1 -2}
524: parameter_test e_expr-11.2.3 "SELECT ?5, ?" {5 ?5 6 {}} {-5 -6}
525: parameter_test e_expr-11.2.4 "SELECT ?, ?5" {1 {} 5 ?5} {-1 -5}
526: parameter_test e_expr-11.2.5 "SELECT ?, ?456, ?" {
527: 1 {} 456 ?456 457 {}
528: } {-1 -456 -457}
529: parameter_test e_expr-11.2.5 "SELECT ?, ?456, ?4, ?" {
530: 1 {} 456 ?456 4 ?4 457 {}
531: } {-1 -456 -4 -457}
532: foreach {tn sql} [list \
533: 1 "SELECT ?$mvn, ?" \
534: 2 "SELECT ?[expr $mvn-5], ?, ?, ?, ?, ?, ?" \
535: 3 "SELECT ?[expr $mvn], ?5, ?6, ?" \
536: ] {
537: do_catchsql_test e_expr-11.3.$tn $sql [list 1 {too many SQL variables}]
538: }
539:
540: # EVIDENCE-OF: R-11620-22743 A colon followed by an identifier name
541: # holds a spot for a named parameter with the name :AAAA.
542: #
543: # Identifiers in SQLite consist of alphanumeric, '_' and '$' characters,
544: # and any UTF characters with codepoints larger than 127 (non-ASCII
545: # characters).
546: #
547: parameter_test e_expr-11.2.1 {SELECT :AAAA} {1 :AAAA} -1
548: parameter_test e_expr-11.2.2 {SELECT :123} {1 :123} -1
549: parameter_test e_expr-11.2.3 {SELECT :__} {1 :__} -1
550: parameter_test e_expr-11.2.4 {SELECT :_$_} {1 :_$_} -1
551: parameter_test e_expr-11.2.5 "
552: SELECT :\u0e40\u0e2d\u0e28\u0e02\u0e39\u0e40\u0e2d\u0e25
553: " "1 :\u0e40\u0e2d\u0e28\u0e02\u0e39\u0e40\u0e2d\u0e25" -1
554: parameter_test e_expr-11.2.6 "SELECT :\u0080" "1 :\u0080" -1
555:
556: # EVIDENCE-OF: R-49783-61279 An "at" sign works exactly like a colon,
557: # except that the name of the parameter created is @AAAA.
558: #
559: parameter_test e_expr-11.3.1 {SELECT @AAAA} {1 @AAAA} -1
560: parameter_test e_expr-11.3.2 {SELECT @123} {1 @123} -1
561: parameter_test e_expr-11.3.3 {SELECT @__} {1 @__} -1
562: parameter_test e_expr-11.3.4 {SELECT @_$_} {1 @_$_} -1
563: parameter_test e_expr-11.3.5 "
564: SELECT @\u0e40\u0e2d\u0e28\u0e02\u0e39\u0e40\u0e2d\u0e25
565: " "1 @\u0e40\u0e2d\u0e28\u0e02\u0e39\u0e40\u0e2d\u0e25" -1
566: parameter_test e_expr-11.3.6 "SELECT @\u0080" "1 @\u0080" -1
567:
568: # EVIDENCE-OF: R-62610-51329 A dollar-sign followed by an identifier
569: # name also holds a spot for a named parameter with the name $AAAA.
570: #
571: # EVIDENCE-OF: R-55025-21042 The identifier name in this case can
572: # include one or more occurrences of "::" and a suffix enclosed in
573: # "(...)" containing any text at all.
574: #
575: # Note: Looks like an identifier cannot consist entirely of "::"
576: # characters or just a suffix. Also, the other named variable characters
577: # (: and @) work the same way internally. Why not just document it that way?
578: #
579: parameter_test e_expr-11.4.1 {SELECT $AAAA} {1 $AAAA} -1
580: parameter_test e_expr-11.4.2 {SELECT $123} {1 $123} -1
581: parameter_test e_expr-11.4.3 {SELECT $__} {1 $__} -1
582: parameter_test e_expr-11.4.4 {SELECT $_$_} {1 $_$_} -1
583: parameter_test e_expr-11.4.5 "
584: SELECT \$\u0e40\u0e2d\u0e28\u0e02\u0e39\u0e40\u0e2d\u0e25
585: " "1 \$\u0e40\u0e2d\u0e28\u0e02\u0e39\u0e40\u0e2d\u0e25" -1
586: parameter_test e_expr-11.4.6 "SELECT \$\u0080" "1 \$\u0080" -1
587:
588: parameter_test e_expr-11.5.1 {SELECT $::::a(++--++)} {1 $::::a(++--++)} -1
589: parameter_test e_expr-11.5.2 {SELECT $::a()} {1 $::a()} -1
590: parameter_test e_expr-11.5.3 {SELECT $::1(::#$)} {1 $::1(::#$)} -1
591:
592: # EVIDENCE-OF: R-11370-04520 Named parameters are also numbered. The
593: # number assigned is one greater than the largest parameter number
594: # already assigned.
595: #
596: # EVIDENCE-OF: R-42620-22184 If this means the parameter would be
597: # assigned a number greater than SQLITE_MAX_VARIABLE_NUMBER, it is an
598: # error.
599: #
600: parameter_test e_expr-11.6.1 "SELECT ?, @abc" {1 {} 2 @abc} {-1 -2}
601: parameter_test e_expr-11.6.2 "SELECT ?123, :a1" {123 ?123 124 :a1} {-123 -124}
602: parameter_test e_expr-11.6.3 {SELECT $a, ?8, ?, $b, ?2, $c} {
603: 1 $a 8 ?8 9 {} 10 $b 2 ?2 11 $c
604: } {-1 -8 -9 -10 -2 -11}
605: foreach {tn sql} [list \
606: 1 "SELECT ?$mvn, \$::a" \
607: 2 "SELECT ?$mvn, ?4, @a1" \
608: 3 "SELECT ?[expr $mvn-2], :bag, @123, \$x" \
609: ] {
610: do_catchsql_test e_expr-11.7.$tn $sql [list 1 {too many SQL variables}]
611: }
612:
613: # EVIDENCE-OF: R-14068-49671 Parameters that are not assigned values
614: # using sqlite3_bind() are treated as NULL.
615: #
616: do_test e_expr-11.7.1 {
617: set stmt [sqlite3_prepare_v2 db { SELECT ?, :a, @b, $d } -1]
618: sqlite3_step $stmt
619:
620: list [sqlite3_column_type $stmt 0] \
621: [sqlite3_column_type $stmt 1] \
622: [sqlite3_column_type $stmt 2] \
623: [sqlite3_column_type $stmt 3]
624: } {NULL NULL NULL NULL}
625: do_test e_expr-11.7.1 { sqlite3_finalize $stmt } SQLITE_OK
626:
627: #-------------------------------------------------------------------------
628: # "Test" the syntax diagrams in lang_expr.html.
629: #
630: # EVIDENCE-OF: R-02989-21050 -- syntax diagram signed-number
631: #
632: do_execsql_test e_expr-12.1.1 { SELECT 0, +0, -0 } {0 0 0}
633: do_execsql_test e_expr-12.1.2 { SELECT 1, +1, -1 } {1 1 -1}
634: do_execsql_test e_expr-12.1.3 { SELECT 2, +2, -2 } {2 2 -2}
635: do_execsql_test e_expr-12.1.4 {
636: SELECT 1.4, +1.4, -1.4
637: } {1.4 1.4 -1.4}
638: do_execsql_test e_expr-12.1.5 {
639: SELECT 1.5e+5, +1.5e+5, -1.5e+5
640: } {150000.0 150000.0 -150000.0}
641: do_execsql_test e_expr-12.1.6 {
642: SELECT 0.0001, +0.0001, -0.0001
643: } {0.0001 0.0001 -0.0001}
644:
645: # EVIDENCE-OF: R-43188-60852 -- syntax diagram literal-value
646: #
647: set sqlite_current_time 1
648: do_execsql_test e_expr-12.2.1 {SELECT 123} {123}
649: do_execsql_test e_expr-12.2.2 {SELECT 123.4e05} {12340000.0}
650: do_execsql_test e_expr-12.2.3 {SELECT 'abcde'} {abcde}
651: do_execsql_test e_expr-12.2.4 {SELECT X'414243'} {ABC}
652: do_execsql_test e_expr-12.2.5 {SELECT NULL} {{}}
653: do_execsql_test e_expr-12.2.6 {SELECT CURRENT_TIME} {00:00:01}
654: do_execsql_test e_expr-12.2.7 {SELECT CURRENT_DATE} {1970-01-01}
655: do_execsql_test e_expr-12.2.8 {SELECT CURRENT_TIMESTAMP} {{1970-01-01 00:00:01}}
656: set sqlite_current_time 0
657:
658: # EVIDENCE-OF: R-50544-32159 -- syntax diagram expr
659: #
660: forcedelete test.db2
661: execsql {
662: ATTACH 'test.db2' AS dbname;
663: CREATE TABLE dbname.tblname(cname);
664: }
665:
666: proc glob {args} {return 1}
667: db function glob glob
668: db function match glob
669: db function regexp glob
670:
671: foreach {tn expr} {
672: 1 123
673: 2 123.4e05
674: 3 'abcde'
675: 4 X'414243'
676: 5 NULL
677: 6 CURRENT_TIME
678: 7 CURRENT_DATE
679: 8 CURRENT_TIMESTAMP
680:
681: 9 ?
682: 10 ?123
683: 11 @hello
684: 12 :world
685: 13 $tcl
686: 14 $tcl(array)
687:
688: 15 cname
689: 16 tblname.cname
690: 17 dbname.tblname.cname
691:
692: 18 "+ EXPR"
693: 19 "- EXPR"
694: 20 "NOT EXPR"
695: 21 "~ EXPR"
696:
697: 22 "EXPR1 || EXPR2"
698: 23 "EXPR1 * EXPR2"
699: 24 "EXPR1 / EXPR2"
700: 25 "EXPR1 % EXPR2"
701: 26 "EXPR1 + EXPR2"
702: 27 "EXPR1 - EXPR2"
703: 28 "EXPR1 << EXPR2"
704: 29 "EXPR1 >> EXPR2"
705: 30 "EXPR1 & EXPR2"
706: 31 "EXPR1 | EXPR2"
707: 32 "EXPR1 < EXPR2"
708: 33 "EXPR1 <= EXPR2"
709: 34 "EXPR1 > EXPR2"
710: 35 "EXPR1 >= EXPR2"
711: 36 "EXPR1 = EXPR2"
712: 37 "EXPR1 == EXPR2"
713: 38 "EXPR1 != EXPR2"
714: 39 "EXPR1 <> EXPR2"
715: 40 "EXPR1 IS EXPR2"
716: 41 "EXPR1 IS NOT EXPR2"
717: 42 "EXPR1 AND EXPR2"
718: 43 "EXPR1 OR EXPR2"
719:
720: 44 "count(*)"
721: 45 "count(DISTINCT EXPR)"
722: 46 "substr(EXPR, 10, 20)"
723: 47 "changes()"
724:
725: 48 "( EXPR )"
726:
727: 49 "CAST ( EXPR AS integer )"
728: 50 "CAST ( EXPR AS 'abcd' )"
729: 51 "CAST ( EXPR AS 'ab$ $cd' )"
730:
731: 52 "EXPR COLLATE nocase"
732: 53 "EXPR COLLATE binary"
733:
734: 54 "EXPR1 LIKE EXPR2"
735: 55 "EXPR1 LIKE EXPR2 ESCAPE EXPR"
736: 56 "EXPR1 GLOB EXPR2"
737: 57 "EXPR1 GLOB EXPR2 ESCAPE EXPR"
738: 58 "EXPR1 REGEXP EXPR2"
739: 59 "EXPR1 REGEXP EXPR2 ESCAPE EXPR"
740: 60 "EXPR1 MATCH EXPR2"
741: 61 "EXPR1 MATCH EXPR2 ESCAPE EXPR"
742: 62 "EXPR1 NOT LIKE EXPR2"
743: 63 "EXPR1 NOT LIKE EXPR2 ESCAPE EXPR"
744: 64 "EXPR1 NOT GLOB EXPR2"
745: 65 "EXPR1 NOT GLOB EXPR2 ESCAPE EXPR"
746: 66 "EXPR1 NOT REGEXP EXPR2"
747: 67 "EXPR1 NOT REGEXP EXPR2 ESCAPE EXPR"
748: 68 "EXPR1 NOT MATCH EXPR2"
749: 69 "EXPR1 NOT MATCH EXPR2 ESCAPE EXPR"
750:
751: 70 "EXPR ISNULL"
752: 71 "EXPR NOTNULL"
753: 72 "EXPR NOT NULL"
754:
755: 73 "EXPR1 IS EXPR2"
756: 74 "EXPR1 IS NOT EXPR2"
757:
758: 75 "EXPR NOT BETWEEN EXPR1 AND EXPR2"
759: 76 "EXPR BETWEEN EXPR1 AND EXPR2"
760:
761: 77 "EXPR NOT IN (SELECT cname FROM tblname)"
762: 78 "EXPR NOT IN (1)"
763: 79 "EXPR NOT IN (1, 2, 3)"
764: 80 "EXPR NOT IN tblname"
765: 81 "EXPR NOT IN dbname.tblname"
766: 82 "EXPR IN (SELECT cname FROM tblname)"
767: 83 "EXPR IN (1)"
768: 84 "EXPR IN (1, 2, 3)"
769: 85 "EXPR IN tblname"
770: 86 "EXPR IN dbname.tblname"
771:
772: 87 "EXISTS (SELECT cname FROM tblname)"
773: 88 "NOT EXISTS (SELECT cname FROM tblname)"
774:
775: 89 "CASE EXPR WHEN EXPR1 THEN EXPR2 ELSE EXPR END"
776: 90 "CASE EXPR WHEN EXPR1 THEN EXPR2 END"
777: 91 "CASE EXPR WHEN EXPR1 THEN EXPR2 WHEN EXPR THEN EXPR1 ELSE EXPR2 END"
778: 92 "CASE EXPR WHEN EXPR1 THEN EXPR2 WHEN EXPR THEN EXPR1 END"
779: 93 "CASE WHEN EXPR1 THEN EXPR2 ELSE EXPR END"
780: 94 "CASE WHEN EXPR1 THEN EXPR2 END"
781: 95 "CASE WHEN EXPR1 THEN EXPR2 WHEN EXPR THEN EXPR1 ELSE EXPR2 END"
782: 96 "CASE WHEN EXPR1 THEN EXPR2 WHEN EXPR THEN EXPR1 END"
783: } {
784:
785: # If the expression string being parsed contains "EXPR2", then replace
786: # string "EXPR1" and "EXPR2" with arbitrary SQL expressions. If it
787: # contains "EXPR", then replace EXPR with an arbitrary SQL expression.
788: #
789: set elist [list $expr]
790: if {[string match *EXPR2* $expr]} {
791: set elist [list]
792: foreach {e1 e2} { cname "34+22" } {
793: lappend elist [string map [list EXPR1 $e1 EXPR2 $e2] $expr]
794: }
795: }
796: if {[string match *EXPR* $expr]} {
797: set elist2 [list]
798: foreach el $elist {
799: foreach e { cname "34+22" } {
800: lappend elist2 [string map [list EXPR $e] $el]
801: }
802: }
803: set elist $elist2
804: }
805:
806: set x 0
807: foreach e $elist {
808: incr x
809: do_test e_expr-12.3.$tn.$x {
810: set rc [catch { execsql "SELECT $e FROM tblname" } msg]
811: } {0}
812: }
813: }
814:
815: # EVIDENCE-OF: R-39820-63916 -- syntax diagram raise-function
816: #
817: foreach {tn raiseexpr} {
818: 1 "RAISE(IGNORE)"
819: 2 "RAISE(ROLLBACK, 'error message')"
820: 3 "RAISE(ABORT, 'error message')"
821: 4 "RAISE(FAIL, 'error message')"
822: } {
823: do_execsql_test e_expr-12.4.$tn "
824: CREATE TRIGGER dbname.tr$tn BEFORE DELETE ON tblname BEGIN
825: SELECT $raiseexpr ;
826: END;
827: " {}
828: }
829:
830: #-------------------------------------------------------------------------
831: # Test the statements related to the BETWEEN operator.
832: #
833: # EVIDENCE-OF: R-40079-54503 The BETWEEN operator is logically
834: # equivalent to a pair of comparisons. "x BETWEEN y AND z" is equivalent
835: # to "x>=y AND x<=z" except that with BETWEEN, the x expression is
836: # only evaluated once.
837: #
838: db func x x
839: proc x {} { incr ::xcount ; return [expr $::x] }
840: foreach {tn x expr res nEval} {
841: 1 10 "x() >= 5 AND x() <= 15" 1 2
842: 2 10 "x() BETWEEN 5 AND 15" 1 1
843:
844: 3 5 "x() >= 5 AND x() <= 5" 1 2
845: 4 5 "x() BETWEEN 5 AND 5" 1 1
846: } {
847: do_test e_expr-13.1.$tn {
848: set ::xcount 0
849: set a [execsql "SELECT $expr"]
850: list $::xcount $a
851: } [list $nEval $res]
852: }
853:
854: # EVIDENCE-OF: R-05155-34454 The precedence of the BETWEEN operator is
855: # the same as the precedence as operators == and != and LIKE and groups
856: # left to right.
857: #
858: # Therefore, BETWEEN groups more tightly than operator "AND", but less
859: # so than "<".
860: #
861: do_execsql_test e_expr-13.2.1 { SELECT 1 == 10 BETWEEN 0 AND 2 } 1
862: do_execsql_test e_expr-13.2.2 { SELECT (1 == 10) BETWEEN 0 AND 2 } 1
863: do_execsql_test e_expr-13.2.3 { SELECT 1 == (10 BETWEEN 0 AND 2) } 0
864: do_execsql_test e_expr-13.2.4 { SELECT 6 BETWEEN 4 AND 8 == 1 } 1
865: do_execsql_test e_expr-13.2.5 { SELECT (6 BETWEEN 4 AND 8) == 1 } 1
866: do_execsql_test e_expr-13.2.6 { SELECT 6 BETWEEN 4 AND (8 == 1) } 0
867:
868: do_execsql_test e_expr-13.2.7 { SELECT 5 BETWEEN 0 AND 0 != 1 } 1
869: do_execsql_test e_expr-13.2.8 { SELECT (5 BETWEEN 0 AND 0) != 1 } 1
870: do_execsql_test e_expr-13.2.9 { SELECT 5 BETWEEN 0 AND (0 != 1) } 0
871: do_execsql_test e_expr-13.2.10 { SELECT 1 != 0 BETWEEN 0 AND 2 } 1
872: do_execsql_test e_expr-13.2.11 { SELECT (1 != 0) BETWEEN 0 AND 2 } 1
873: do_execsql_test e_expr-13.2.12 { SELECT 1 != (0 BETWEEN 0 AND 2) } 0
874:
875: do_execsql_test e_expr-13.2.13 { SELECT 1 LIKE 10 BETWEEN 0 AND 2 } 1
876: do_execsql_test e_expr-13.2.14 { SELECT (1 LIKE 10) BETWEEN 0 AND 2 } 1
877: do_execsql_test e_expr-13.2.15 { SELECT 1 LIKE (10 BETWEEN 0 AND 2) } 0
878: do_execsql_test e_expr-13.2.16 { SELECT 6 BETWEEN 4 AND 8 LIKE 1 } 1
879: do_execsql_test e_expr-13.2.17 { SELECT (6 BETWEEN 4 AND 8) LIKE 1 } 1
880: do_execsql_test e_expr-13.2.18 { SELECT 6 BETWEEN 4 AND (8 LIKE 1) } 0
881:
882: do_execsql_test e_expr-13.2.19 { SELECT 0 AND 0 BETWEEN 0 AND 1 } 0
883: do_execsql_test e_expr-13.2.20 { SELECT 0 AND (0 BETWEEN 0 AND 1) } 0
884: do_execsql_test e_expr-13.2.21 { SELECT (0 AND 0) BETWEEN 0 AND 1 } 1
885: do_execsql_test e_expr-13.2.22 { SELECT 0 BETWEEN -1 AND 1 AND 0 } 0
886: do_execsql_test e_expr-13.2.23 { SELECT (0 BETWEEN -1 AND 1) AND 0 } 0
887: do_execsql_test e_expr-13.2.24 { SELECT 0 BETWEEN -1 AND (1 AND 0) } 1
888:
889: do_execsql_test e_expr-13.2.25 { SELECT 2 < 3 BETWEEN 0 AND 1 } 1
890: do_execsql_test e_expr-13.2.26 { SELECT (2 < 3) BETWEEN 0 AND 1 } 1
891: do_execsql_test e_expr-13.2.27 { SELECT 2 < (3 BETWEEN 0 AND 1) } 0
892: do_execsql_test e_expr-13.2.28 { SELECT 2 BETWEEN 1 AND 2 < 3 } 0
893: do_execsql_test e_expr-13.2.29 { SELECT 2 BETWEEN 1 AND (2 < 3) } 0
894: do_execsql_test e_expr-13.2.30 { SELECT (2 BETWEEN 1 AND 2) < 3 } 1
895:
896: #-------------------------------------------------------------------------
897: # Test the statements related to the LIKE and GLOB operators.
898: #
899: # EVIDENCE-OF: R-16584-60189 The LIKE operator does a pattern matching
900: # comparison.
901: #
902: # EVIDENCE-OF: R-11295-04657 The operand to the right of the LIKE
903: # operator contains the pattern and the left hand operand contains the
904: # string to match against the pattern.
905: #
906: do_execsql_test e_expr-14.1.1 { SELECT 'abc%' LIKE 'abcde' } 0
907: do_execsql_test e_expr-14.1.2 { SELECT 'abcde' LIKE 'abc%' } 1
908:
909: # EVIDENCE-OF: R-55406-38524 A percent symbol ("%") in the LIKE pattern
910: # matches any sequence of zero or more characters in the string.
911: #
912: do_execsql_test e_expr-14.2.1 { SELECT 'abde' LIKE 'ab%de' } 1
913: do_execsql_test e_expr-14.2.2 { SELECT 'abXde' LIKE 'ab%de' } 1
914: do_execsql_test e_expr-14.2.3 { SELECT 'abABCde' LIKE 'ab%de' } 1
915:
916: # EVIDENCE-OF: R-30433-25443 An underscore ("_") in the LIKE pattern
917: # matches any single character in the string.
918: #
919: do_execsql_test e_expr-14.3.1 { SELECT 'abde' LIKE 'ab_de' } 0
920: do_execsql_test e_expr-14.3.2 { SELECT 'abXde' LIKE 'ab_de' } 1
921: do_execsql_test e_expr-14.3.3 { SELECT 'abABCde' LIKE 'ab_de' } 0
922:
923: # EVIDENCE-OF: R-59007-20454 Any other character matches itself or its
924: # lower/upper case equivalent (i.e. case-insensitive matching).
925: #
926: do_execsql_test e_expr-14.4.1 { SELECT 'abc' LIKE 'aBc' } 1
927: do_execsql_test e_expr-14.4.2 { SELECT 'aBc' LIKE 'aBc' } 1
928: do_execsql_test e_expr-14.4.3 { SELECT 'ac' LIKE 'aBc' } 0
929:
930: # EVIDENCE-OF: R-23648-58527 SQLite only understands upper/lower case
931: # for ASCII characters by default.
932: #
933: # EVIDENCE-OF: R-04532-11527 The LIKE operator is case sensitive by
934: # default for unicode characters that are beyond the ASCII range.
935: #
936: # EVIDENCE-OF: R-44381-11669 the expression
937: # 'a' LIKE 'A' is TRUE but
938: # 'æ' LIKE 'Æ' is FALSE.
939: #
940: # The restriction to ASCII characters does not apply if the ICU
941: # library is compiled in. When ICU is enabled SQLite does not act
942: # as it does "by default".
943: #
944: do_execsql_test e_expr-14.5.1 { SELECT 'A' LIKE 'a' } 1
945: ifcapable !icu {
946: do_execsql_test e_expr-14.5.2 "SELECT '\u00c6' LIKE '\u00e6'" 0
947: }
948:
949: # EVIDENCE-OF: R-56683-13731 If the optional ESCAPE clause is present,
950: # then the expression following the ESCAPE keyword must evaluate to a
951: # string consisting of a single character.
952: #
953: do_catchsql_test e_expr-14.6.1 {
954: SELECT 'A' LIKE 'a' ESCAPE '12'
955: } {1 {ESCAPE expression must be a single character}}
956: do_catchsql_test e_expr-14.6.2 {
957: SELECT 'A' LIKE 'a' ESCAPE ''
958: } {1 {ESCAPE expression must be a single character}}
959: do_catchsql_test e_expr-14.6.3 { SELECT 'A' LIKE 'a' ESCAPE 'x' } {0 1}
960: do_catchsql_test e_expr-14.6.4 "SELECT 'A' LIKE 'a' ESCAPE '\u00e6'" {0 1}
961:
962: # EVIDENCE-OF: R-02045-23762 This character may be used in the LIKE
963: # pattern to include literal percent or underscore characters.
964: #
965: # EVIDENCE-OF: R-13345-31830 The escape character followed by a percent
966: # symbol (%), underscore (_), or a second instance of the escape
967: # character itself matches a literal percent symbol, underscore, or a
968: # single escape character, respectively.
969: #
970: do_execsql_test e_expr-14.7.1 { SELECT 'abc%' LIKE 'abcX%' ESCAPE 'X' } 1
971: do_execsql_test e_expr-14.7.2 { SELECT 'abc5' LIKE 'abcX%' ESCAPE 'X' } 0
972: do_execsql_test e_expr-14.7.3 { SELECT 'abc' LIKE 'abcX%' ESCAPE 'X' } 0
973: do_execsql_test e_expr-14.7.4 { SELECT 'abcX%' LIKE 'abcX%' ESCAPE 'X' } 0
974: do_execsql_test e_expr-14.7.5 { SELECT 'abc%%' LIKE 'abcX%' ESCAPE 'X' } 0
975:
976: do_execsql_test e_expr-14.7.6 { SELECT 'abc_' LIKE 'abcX_' ESCAPE 'X' } 1
977: do_execsql_test e_expr-14.7.7 { SELECT 'abc5' LIKE 'abcX_' ESCAPE 'X' } 0
978: do_execsql_test e_expr-14.7.8 { SELECT 'abc' LIKE 'abcX_' ESCAPE 'X' } 0
979: do_execsql_test e_expr-14.7.9 { SELECT 'abcX_' LIKE 'abcX_' ESCAPE 'X' } 0
980: do_execsql_test e_expr-14.7.10 { SELECT 'abc__' LIKE 'abcX_' ESCAPE 'X' } 0
981:
982: do_execsql_test e_expr-14.7.11 { SELECT 'abcX' LIKE 'abcXX' ESCAPE 'X' } 1
983: do_execsql_test e_expr-14.7.12 { SELECT 'abc5' LIKE 'abcXX' ESCAPE 'X' } 0
984: do_execsql_test e_expr-14.7.13 { SELECT 'abc' LIKE 'abcXX' ESCAPE 'X' } 0
985: do_execsql_test e_expr-14.7.14 { SELECT 'abcXX' LIKE 'abcXX' ESCAPE 'X' } 0
986:
987: # EVIDENCE-OF: R-51359-17496 The infix LIKE operator is implemented by
988: # calling the application-defined SQL functions like(Y,X) or like(Y,X,Z).
989: #
990: proc likefunc {args} {
991: eval lappend ::likeargs $args
992: return 1
993: }
994: db func like -argcount 2 likefunc
995: db func like -argcount 3 likefunc
996: set ::likeargs [list]
997: do_execsql_test e_expr-15.1.1 { SELECT 'abc' LIKE 'def' } 1
998: do_test e_expr-15.1.2 { set likeargs } {def abc}
999: set ::likeargs [list]
1000: do_execsql_test e_expr-15.1.3 { SELECT 'abc' LIKE 'def' ESCAPE 'X' } 1
1001: do_test e_expr-15.1.4 { set likeargs } {def abc X}
1002: db close
1003: sqlite3 db test.db
1004:
1005: # EVIDENCE-OF: R-22868-25880 The LIKE operator can be made case
1006: # sensitive using the case_sensitive_like pragma.
1007: #
1008: do_execsql_test e_expr-16.1.1 { SELECT 'abcxyz' LIKE 'ABC%' } 1
1009: do_execsql_test e_expr-16.1.2 { PRAGMA case_sensitive_like = 1 } {}
1010: do_execsql_test e_expr-16.1.3 { SELECT 'abcxyz' LIKE 'ABC%' } 0
1011: do_execsql_test e_expr-16.1.4 { SELECT 'ABCxyz' LIKE 'ABC%' } 1
1012: do_execsql_test e_expr-16.1.5 { PRAGMA case_sensitive_like = 0 } {}
1013: do_execsql_test e_expr-16.1.6 { SELECT 'abcxyz' LIKE 'ABC%' } 1
1014: do_execsql_test e_expr-16.1.7 { SELECT 'ABCxyz' LIKE 'ABC%' } 1
1015:
1016: # EVIDENCE-OF: R-52087-12043 The GLOB operator is similar to LIKE but
1017: # uses the Unix file globbing syntax for its wildcards.
1018: #
1019: # EVIDENCE-OF: R-09813-17279 Also, GLOB is case sensitive, unlike LIKE.
1020: #
1021: do_execsql_test e_expr-17.1.1 { SELECT 'abcxyz' GLOB 'abc%' } 0
1022: do_execsql_test e_expr-17.1.2 { SELECT 'abcxyz' GLOB 'abc*' } 1
1023: do_execsql_test e_expr-17.1.3 { SELECT 'abcxyz' GLOB 'abc___' } 0
1024: do_execsql_test e_expr-17.1.4 { SELECT 'abcxyz' GLOB 'abc???' } 1
1025:
1026: do_execsql_test e_expr-17.1.5 { SELECT 'abcxyz' GLOB 'abc*' } 1
1027: do_execsql_test e_expr-17.1.6 { SELECT 'ABCxyz' GLOB 'abc*' } 0
1028: do_execsql_test e_expr-17.1.7 { SELECT 'abcxyz' GLOB 'ABC*' } 0
1029:
1030: # EVIDENCE-OF: R-39616-20555 Both GLOB and LIKE may be preceded by the
1031: # NOT keyword to invert the sense of the test.
1032: #
1033: do_execsql_test e_expr-17.2.1 { SELECT 'abcxyz' NOT GLOB 'ABC*' } 1
1034: do_execsql_test e_expr-17.2.2 { SELECT 'abcxyz' NOT GLOB 'abc*' } 0
1035: do_execsql_test e_expr-17.2.3 { SELECT 'abcxyz' NOT LIKE 'ABC%' } 0
1036: do_execsql_test e_expr-17.2.4 { SELECT 'abcxyz' NOT LIKE 'abc%' } 0
1037: do_execsql_test e_expr-17.2.5 { SELECT 'abdxyz' NOT LIKE 'abc%' } 1
1038:
1039: db nullvalue null
1040: do_execsql_test e_expr-17.2.6 { SELECT 'abcxyz' NOT GLOB NULL } null
1041: do_execsql_test e_expr-17.2.7 { SELECT 'abcxyz' NOT LIKE NULL } null
1042: do_execsql_test e_expr-17.2.8 { SELECT NULL NOT GLOB 'abc*' } null
1043: do_execsql_test e_expr-17.2.9 { SELECT NULL NOT LIKE 'ABC%' } null
1044: db nullvalue {}
1045:
1046: # EVIDENCE-OF: R-39414-35489 The infix GLOB operator is implemented by
1047: # calling the function glob(Y,X) and can be modified by overriding that
1048: # function.
1049: proc globfunc {args} {
1050: eval lappend ::globargs $args
1051: return 1
1052: }
1053: db func glob -argcount 2 globfunc
1054: set ::globargs [list]
1055: do_execsql_test e_expr-17.3.1 { SELECT 'abc' GLOB 'def' } 1
1056: do_test e_expr-17.3.2 { set globargs } {def abc}
1057: set ::globargs [list]
1058: do_execsql_test e_expr-17.3.3 { SELECT 'X' NOT GLOB 'Y' } 0
1059: do_test e_expr-17.3.4 { set globargs } {Y X}
1060: sqlite3 db test.db
1061:
1062: # EVIDENCE-OF: R-41650-20872 No regexp() user function is defined by
1063: # default and so use of the REGEXP operator will normally result in an
1064: # error message.
1065: #
1066: # There is a regexp function if ICU is enabled though.
1067: #
1068: ifcapable !icu {
1069: do_catchsql_test e_expr-18.1.1 {
1070: SELECT regexp('abc', 'def')
1071: } {1 {no such function: regexp}}
1072: do_catchsql_test e_expr-18.1.2 {
1073: SELECT 'abc' REGEXP 'def'
1074: } {1 {no such function: REGEXP}}
1075: }
1076:
1077: # EVIDENCE-OF: R-33693-50180 The REGEXP operator is a special syntax for
1078: # the regexp() user function.
1079: #
1080: # EVIDENCE-OF: R-57289-13578 If a application-defined SQL function named
1081: # "regexp" is added at run-time, that function will be called in order
1082: # to implement the REGEXP operator.
1083: #
1084: proc regexpfunc {args} {
1085: eval lappend ::regexpargs $args
1086: return 1
1087: }
1088: db func regexp -argcount 2 regexpfunc
1089: set ::regexpargs [list]
1090: do_execsql_test e_expr-18.2.1 { SELECT 'abc' REGEXP 'def' } 1
1091: do_test e_expr-18.2.2 { set regexpargs } {def abc}
1092: set ::regexpargs [list]
1093: do_execsql_test e_expr-18.2.3 { SELECT 'X' NOT REGEXP 'Y' } 0
1094: do_test e_expr-18.2.4 { set regexpargs } {Y X}
1095: sqlite3 db test.db
1096:
1097: # EVIDENCE-OF: R-42037-37826 The default match() function implementation
1098: # raises an exception and is not really useful for anything.
1099: #
1100: do_catchsql_test e_expr-19.1.1 {
1101: SELECT 'abc' MATCH 'def'
1102: } {1 {unable to use function MATCH in the requested context}}
1103: do_catchsql_test e_expr-19.1.2 {
1104: SELECT match('abc', 'def')
1105: } {1 {unable to use function MATCH in the requested context}}
1106:
1107: # EVIDENCE-OF: R-37916-47407 The MATCH operator is a special syntax for
1108: # the match() application-defined function.
1109: #
1110: # EVIDENCE-OF: R-06021-09373 But extensions can override the match()
1111: # function with more helpful logic.
1112: #
1113: proc matchfunc {args} {
1114: eval lappend ::matchargs $args
1115: return 1
1116: }
1117: db func match -argcount 2 matchfunc
1118: set ::matchargs [list]
1119: do_execsql_test e_expr-19.2.1 { SELECT 'abc' MATCH 'def' } 1
1120: do_test e_expr-19.2.2 { set matchargs } {def abc}
1121: set ::matchargs [list]
1122: do_execsql_test e_expr-19.2.3 { SELECT 'X' NOT MATCH 'Y' } 0
1123: do_test e_expr-19.2.4 { set matchargs } {Y X}
1124: sqlite3 db test.db
1125:
1126: #-------------------------------------------------------------------------
1127: # Test cases for the testable statements related to the CASE expression.
1128: #
1129: # EVIDENCE-OF: R-15199-61389 There are two basic forms of the CASE
1130: # expression: those with a base expression and those without.
1131: #
1132: do_execsql_test e_expr-20.1 {
1133: SELECT CASE WHEN 1 THEN 'true' WHEN 0 THEN 'false' ELSE 'else' END;
1134: } {true}
1135: do_execsql_test e_expr-20.2 {
1136: SELECT CASE 0 WHEN 1 THEN 'true' WHEN 0 THEN 'false' ELSE 'else' END;
1137: } {false}
1138:
1139: proc var {nm} {
1140: lappend ::varlist $nm
1141: return [set "::$nm"]
1142: }
1143: db func var var
1144:
1145: # EVIDENCE-OF: R-30638-59954 In a CASE without a base expression, each
1146: # WHEN expression is evaluated and the result treated as a boolean,
1147: # starting with the leftmost and continuing to the right.
1148: #
1149: foreach {a b c} {0 0 0} break
1150: set varlist [list]
1151: do_execsql_test e_expr-21.1.1 {
1152: SELECT CASE WHEN var('a') THEN 'A'
1153: WHEN var('b') THEN 'B'
1154: WHEN var('c') THEN 'C' END
1155: } {{}}
1156: do_test e_expr-21.1.2 { set varlist } {a b c}
1157: set varlist [list]
1158: do_execsql_test e_expr-21.1.3 {
1159: SELECT CASE WHEN var('c') THEN 'C'
1160: WHEN var('b') THEN 'B'
1161: WHEN var('a') THEN 'A'
1162: ELSE 'no result'
1163: END
1164: } {{no result}}
1165: do_test e_expr-21.1.4 { set varlist } {c b a}
1166:
1167: # EVIDENCE-OF: R-39009-25596 The result of the CASE expression is the
1168: # evaluation of the THEN expression that corresponds to the first WHEN
1169: # expression that evaluates to true.
1170: #
1171: foreach {a b c} {0 1 0} break
1172: do_execsql_test e_expr-21.2.1 {
1173: SELECT CASE WHEN var('a') THEN 'A'
1174: WHEN var('b') THEN 'B'
1175: WHEN var('c') THEN 'C'
1176: ELSE 'no result'
1177: END
1178: } {B}
1179: foreach {a b c} {0 1 1} break
1180: do_execsql_test e_expr-21.2.2 {
1181: SELECT CASE WHEN var('a') THEN 'A'
1182: WHEN var('b') THEN 'B'
1183: WHEN var('c') THEN 'C'
1184: ELSE 'no result'
1185: END
1186: } {B}
1187: foreach {a b c} {0 0 1} break
1188: do_execsql_test e_expr-21.2.3 {
1189: SELECT CASE WHEN var('a') THEN 'A'
1190: WHEN var('b') THEN 'B'
1191: WHEN var('c') THEN 'C'
1192: ELSE 'no result'
1193: END
1194: } {C}
1195:
1196: # EVIDENCE-OF: R-24227-04807 Or, if none of the WHEN expressions
1197: # evaluate to true, the result of evaluating the ELSE expression, if
1198: # any.
1199: #
1200: foreach {a b c} {0 0 0} break
1201: do_execsql_test e_expr-21.3.1 {
1202: SELECT CASE WHEN var('a') THEN 'A'
1203: WHEN var('b') THEN 'B'
1204: WHEN var('c') THEN 'C'
1205: ELSE 'no result'
1206: END
1207: } {{no result}}
1208:
1209: # EVIDENCE-OF: R-14168-07579 If there is no ELSE expression and none of
1210: # the WHEN expressions are true, then the overall result is NULL.
1211: #
1212: db nullvalue null
1213: do_execsql_test e_expr-21.3.2 {
1214: SELECT CASE WHEN var('a') THEN 'A'
1215: WHEN var('b') THEN 'B'
1216: WHEN var('c') THEN 'C'
1217: END
1218: } {null}
1219: db nullvalue {}
1220:
1221: # EVIDENCE-OF: R-13943-13592 A NULL result is considered untrue when
1222: # evaluating WHEN terms.
1223: #
1224: do_execsql_test e_expr-21.4.1 {
1225: SELECT CASE WHEN NULL THEN 'A' WHEN 1 THEN 'B' END
1226: } {B}
1227: do_execsql_test e_expr-21.4.2 {
1228: SELECT CASE WHEN 0 THEN 'A' WHEN NULL THEN 'B' ELSE 'C' END
1229: } {C}
1230:
1231: # EVIDENCE-OF: R-38620-19499 In a CASE with a base expression, the base
1232: # expression is evaluated just once and the result is compared against
1233: # the evaluation of each WHEN expression from left to right.
1234: #
1235: # Note: This test case tests the "evaluated just once" part of the above
1236: # statement. Tests associated with the next two statements test that the
1237: # comparisons take place.
1238: #
1239: foreach {a b c} [list [expr 3] [expr 4] [expr 5]] break
1240: set ::varlist [list]
1241: do_execsql_test e_expr-22.1.1 {
1242: SELECT CASE var('a') WHEN 1 THEN 'A' WHEN 2 THEN 'B' WHEN 3 THEN 'C' END
1243: } {C}
1244: do_test e_expr-22.1.2 { set ::varlist } {a}
1245:
1246: # EVIDENCE-OF: R-07667-49537 The result of the CASE expression is the
1247: # evaluation of the THEN expression that corresponds to the first WHEN
1248: # expression for which the comparison is true.
1249: #
1250: do_execsql_test e_expr-22.2.1 {
1251: SELECT CASE 23 WHEN 1 THEN 'A' WHEN 23 THEN 'B' WHEN 23 THEN 'C' END
1252: } {B}
1253: do_execsql_test e_expr-22.2.2 {
1254: SELECT CASE 1 WHEN 1 THEN 'A' WHEN 23 THEN 'B' WHEN 23 THEN 'C' END
1255: } {A}
1256:
1257: # EVIDENCE-OF: R-47543-32145 Or, if none of the WHEN expressions
1258: # evaluate to a value equal to the base expression, the result of
1259: # evaluating the ELSE expression, if any.
1260: #
1261: do_execsql_test e_expr-22.3.1 {
1262: SELECT CASE 24 WHEN 1 THEN 'A' WHEN 23 THEN 'B' WHEN 23 THEN 'C' ELSE 'D' END
1263: } {D}
1264:
1265: # EVIDENCE-OF: R-54721-48557 If there is no ELSE expression and none of
1266: # the WHEN expressions produce a result equal to the base expression,
1267: # the overall result is NULL.
1268: #
1269: do_execsql_test e_expr-22.4.1 {
1270: SELECT CASE 24 WHEN 1 THEN 'A' WHEN 23 THEN 'B' WHEN 23 THEN 'C' END
1271: } {{}}
1272: db nullvalue null
1273: do_execsql_test e_expr-22.4.2 {
1274: SELECT CASE 24 WHEN 1 THEN 'A' WHEN 23 THEN 'B' WHEN 23 THEN 'C' END
1275: } {null}
1276: db nullvalue {}
1277:
1278: # EVIDENCE-OF: R-11479-62774 When comparing a base expression against a
1279: # WHEN expression, the same collating sequence, affinity, and
1280: # NULL-handling rules apply as if the base expression and WHEN
1281: # expression are respectively the left- and right-hand operands of an =
1282: # operator.
1283: #
1284: proc rev {str} {
1285: set ret ""
1286: set chars [split $str]
1287: for {set i [expr [llength $chars]-1]} {$i>=0} {incr i -1} {
1288: append ret [lindex $chars $i]
1289: }
1290: set ret
1291: }
1292: proc reverse {lhs rhs} {
1293: string compare [rev $lhs] [ref $rhs]
1294: }
1295: db collate reverse reverse
1296: do_execsql_test e_expr-23.1.1 {
1297: CREATE TABLE t1(
1298: a TEXT COLLATE NOCASE,
1299: b COLLATE REVERSE,
1300: c INTEGER,
1301: d BLOB
1302: );
1303: INSERT INTO t1 VALUES('abc', 'cba', 55, 34.5);
1304: } {}
1305: do_execsql_test e_expr-23.1.2 {
1306: SELECT CASE a WHEN 'xyz' THEN 'A' WHEN 'AbC' THEN 'B' END FROM t1
1307: } {B}
1308: do_execsql_test e_expr-23.1.3 {
1309: SELECT CASE 'AbC' WHEN 'abc' THEN 'A' WHEN a THEN 'B' END FROM t1
1310: } {B}
1311: do_execsql_test e_expr-23.1.4 {
1312: SELECT CASE a WHEN b THEN 'A' ELSE 'B' END FROM t1
1313: } {B}
1314: do_execsql_test e_expr-23.1.5 {
1315: SELECT CASE b WHEN a THEN 'A' ELSE 'B' END FROM t1
1316: } {A}
1317: do_execsql_test e_expr-23.1.6 {
1318: SELECT CASE 55 WHEN '55' THEN 'A' ELSE 'B' END
1319: } {B}
1320: do_execsql_test e_expr-23.1.7 {
1321: SELECT CASE c WHEN '55' THEN 'A' ELSE 'B' END FROM t1
1322: } {A}
1323: do_execsql_test e_expr-23.1.8 {
1324: SELECT CASE '34.5' WHEN d THEN 'A' ELSE 'B' END FROM t1
1325: } {B}
1326: do_execsql_test e_expr-23.1.9 {
1327: SELECT CASE NULL WHEN NULL THEN 'A' ELSE 'B' END
1328: } {B}
1329:
1330: # EVIDENCE-OF: R-37304-39405 If the base expression is NULL then the
1331: # result of the CASE is always the result of evaluating the ELSE
1332: # expression if it exists, or NULL if it does not.
1333: #
1334: do_execsql_test e_expr-24.1.1 {
1335: SELECT CASE NULL WHEN 'abc' THEN 'A' WHEN 'def' THEN 'B' END;
1336: } {{}}
1337: do_execsql_test e_expr-24.1.2 {
1338: SELECT CASE NULL WHEN 'abc' THEN 'A' WHEN 'def' THEN 'B' ELSE 'C' END;
1339: } {C}
1340:
1341: # EVIDENCE-OF: R-56280-17369 Both forms of the CASE expression use lazy,
1342: # or short-circuit, evaluation.
1343: #
1344: set varlist [list]
1345: foreach {a b c} {0 1 0} break
1346: do_execsql_test e_expr-25.1.1 {
1347: SELECT CASE WHEN var('a') THEN 'A'
1348: WHEN var('b') THEN 'B'
1349: WHEN var('c') THEN 'C'
1350: END
1351: } {B}
1352: do_test e_expr-25.1.2 { set ::varlist } {a b}
1353: set varlist [list]
1354: do_execsql_test e_expr-25.1.3 {
1355: SELECT CASE '0' WHEN var('a') THEN 'A'
1356: WHEN var('b') THEN 'B'
1357: WHEN var('c') THEN 'C'
1358: END
1359: } {A}
1360: do_test e_expr-25.1.4 { set ::varlist } {a}
1361:
1362: # EVIDENCE-OF: R-34773-62253 The only difference between the following
1363: # two CASE expressions is that the x expression is evaluated exactly
1364: # once in the first example but might be evaluated multiple times in the
1365: # second: CASE x WHEN w1 THEN r1 WHEN w2 THEN r2 ELSE r3 END CASE WHEN
1366: # x=w1 THEN r1 WHEN x=w2 THEN r2 ELSE r3 END
1367: #
1368: proc ceval {x} {
1369: incr ::evalcount
1370: return $x
1371: }
1372: db func ceval ceval
1373: set ::evalcount 0
1374:
1375: do_execsql_test e_expr-26.1.1 {
1376: CREATE TABLE t2(x, w1, r1, w2, r2, r3);
1377: INSERT INTO t2 VALUES(1, 1, 'R1', 2, 'R2', 'R3');
1378: INSERT INTO t2 VALUES(2, 1, 'R1', 2, 'R2', 'R3');
1379: INSERT INTO t2 VALUES(3, 1, 'R1', 2, 'R2', 'R3');
1380: } {}
1381: do_execsql_test e_expr-26.1.2 {
1382: SELECT CASE x WHEN w1 THEN r1 WHEN w2 THEN r2 ELSE r3 END FROM t2
1383: } {R1 R2 R3}
1384: do_execsql_test e_expr-26.1.3 {
1385: SELECT CASE WHEN x=w1 THEN r1 WHEN x=w2 THEN r2 ELSE r3 END FROM t2
1386: } {R1 R2 R3}
1387:
1388: do_execsql_test e_expr-26.1.4 {
1389: SELECT CASE ceval(x) WHEN w1 THEN r1 WHEN w2 THEN r2 ELSE r3 END FROM t2
1390: } {R1 R2 R3}
1391: do_test e_expr-26.1.5 { set ::evalcount } {3}
1392: set ::evalcount 0
1393: do_execsql_test e_expr-26.1.6 {
1394: SELECT CASE
1395: WHEN ceval(x)=w1 THEN r1
1396: WHEN ceval(x)=w2 THEN r2
1397: ELSE r3 END
1398: FROM t2
1399: } {R1 R2 R3}
1400: do_test e_expr-26.1.6 { set ::evalcount } {5}
1401:
1402:
1403: #-------------------------------------------------------------------------
1404: # Test statements related to CAST expressions.
1405: #
1406: # EVIDENCE-OF: R-65079-31758 Application of a CAST expression is
1407: # different to application of a column affinity, as with a CAST
1408: # expression the storage class conversion is forced even if it is lossy
1409: # and irrreversible.
1410: #
1411: do_execsql_test e_expr-27.1.1 {
1412: CREATE TABLE t3(a TEXT, b REAL, c INTEGER);
1413: INSERT INTO t3 VALUES(X'555655', '1.23abc', 4.5);
1414: SELECT typeof(a), a, typeof(b), b, typeof(c), c FROM t3;
1415: } {blob UVU text 1.23abc real 4.5}
1416: do_execsql_test e_expr-27.1.2 {
1417: SELECT
1418: typeof(CAST(X'555655' as TEXT)), CAST(X'555655' as TEXT),
1419: typeof(CAST('1.23abc' as REAL)), CAST('1.23abc' as REAL),
1420: typeof(CAST(4.5 as INTEGER)), CAST(4.5 as INTEGER)
1421: } {text UVU real 1.23 integer 4}
1422:
1423: # EVIDENCE-OF: R-27225-65050 If the value of <expr> is NULL, then
1424: # the result of the CAST expression is also NULL.
1425: #
1426: do_expr_test e_expr-27.2.1 { CAST(NULL AS integer) } null {}
1427: do_expr_test e_expr-27.2.2 { CAST(NULL AS text) } null {}
1428: do_expr_test e_expr-27.2.3 { CAST(NULL AS blob) } null {}
1429: do_expr_test e_expr-27.2.4 { CAST(NULL AS number) } null {}
1430:
1431: # EVIDENCE-OF: R-31076-23575 Casting a value to a <type-name> with
1432: # no affinity causes the value to be converted into a BLOB.
1433: #
1434: do_expr_test e_expr-27.3.1 { CAST('abc' AS blob) } blob abc
1435: do_expr_test e_expr-27.3.2 { CAST('def' AS shobblob_x) } blob def
1436: do_expr_test e_expr-27.3.3 { CAST('ghi' AS abbLOb10) } blob ghi
1437:
1438: # EVIDENCE-OF: R-22956-37754 Casting to a BLOB consists of first casting
1439: # the value to TEXT in the encoding of the database connection, then
1440: # interpreting the resulting byte sequence as a BLOB instead of as TEXT.
1441: #
1442: do_qexpr_test e_expr-27.4.1 { CAST('ghi' AS blob) } X'676869'
1443: do_qexpr_test e_expr-27.4.2 { CAST(456 AS blob) } X'343536'
1444: do_qexpr_test e_expr-27.4.3 { CAST(1.78 AS blob) } X'312E3738'
1445: rename db db2
1446: sqlite3 db :memory:
1447: ifcapable {utf16} {
1448: db eval { PRAGMA encoding = 'utf-16le' }
1449: do_qexpr_test e_expr-27.4.4 { CAST('ghi' AS blob) } X'670068006900'
1450: do_qexpr_test e_expr-27.4.5 { CAST(456 AS blob) } X'340035003600'
1451: do_qexpr_test e_expr-27.4.6 { CAST(1.78 AS blob) } X'31002E0037003800'
1452: }
1453: db close
1454: sqlite3 db :memory:
1455: db eval { PRAGMA encoding = 'utf-16be' }
1456: ifcapable {utf16} {
1457: do_qexpr_test e_expr-27.4.7 { CAST('ghi' AS blob) } X'006700680069'
1458: do_qexpr_test e_expr-27.4.8 { CAST(456 AS blob) } X'003400350036'
1459: do_qexpr_test e_expr-27.4.9 { CAST(1.78 AS blob) } X'0031002E00370038'
1460: }
1461: db close
1462: rename db2 db
1463:
1464: # EVIDENCE-OF: R-04207-37981 To cast a BLOB value to TEXT, the sequence
1465: # of bytes that make up the BLOB is interpreted as text encoded using
1466: # the database encoding.
1467: #
1468: do_expr_test e_expr-28.1.1 { CAST (X'676869' AS text) } text ghi
1469: do_expr_test e_expr-28.1.2 { CAST (X'670068006900' AS text) } text g
1470: rename db db2
1471: sqlite3 db :memory:
1472: db eval { PRAGMA encoding = 'utf-16le' }
1473: ifcapable {utf16} {
1474: do_expr_test e_expr-28.1.3 { CAST (X'676869' AS text) == 'ghi' } integer 0
1475: do_expr_test e_expr-28.1.4 { CAST (X'670068006900' AS text) } text ghi
1476: }
1477: db close
1478: rename db2 db
1479:
1480: # EVIDENCE-OF: R-22235-47006 Casting an INTEGER or REAL value into TEXT
1481: # renders the value as if via sqlite3_snprintf() except that the
1482: # resulting TEXT uses the encoding of the database connection.
1483: #
1484: do_expr_test e_expr-28.2.1 { CAST (1 AS text) } text 1
1485: do_expr_test e_expr-28.2.2 { CAST (45 AS text) } text 45
1486: do_expr_test e_expr-28.2.3 { CAST (-45 AS text) } text -45
1487: do_expr_test e_expr-28.2.4 { CAST (8.8 AS text) } text 8.8
1488: do_expr_test e_expr-28.2.5 { CAST (2.3e+5 AS text) } text 230000.0
1489: do_expr_test e_expr-28.2.6 { CAST (-2.3e-5 AS text) } text -2.3e-05
1490: do_expr_test e_expr-28.2.7 { CAST (0.0 AS text) } text 0.0
1491: do_expr_test e_expr-28.2.7 { CAST (0 AS text) } text 0
1492:
1493: # EVIDENCE-OF: R-26346-36443 When casting a BLOB value to a REAL, the
1494: # value is first converted to TEXT.
1495: #
1496: do_expr_test e_expr-29.1.1 { CAST (X'312E3233' AS REAL) } real 1.23
1497: do_expr_test e_expr-29.1.2 { CAST (X'3233302E30' AS REAL) } real 230.0
1498: do_expr_test e_expr-29.1.3 { CAST (X'2D392E3837' AS REAL) } real -9.87
1499: do_expr_test e_expr-29.1.4 { CAST (X'302E30303031' AS REAL) } real 0.0001
1500: rename db db2
1501: sqlite3 db :memory:
1502: ifcapable {utf16} {
1503: db eval { PRAGMA encoding = 'utf-16le' }
1504: do_expr_test e_expr-29.1.5 {
1505: CAST (X'31002E0032003300' AS REAL) } real 1.23
1506: do_expr_test e_expr-29.1.6 {
1507: CAST (X'3200330030002E003000' AS REAL) } real 230.0
1508: do_expr_test e_expr-29.1.7 {
1509: CAST (X'2D0039002E0038003700' AS REAL) } real -9.87
1510: do_expr_test e_expr-29.1.8 {
1511: CAST (X'30002E003000300030003100' AS REAL) } real 0.0001
1512: }
1513: db close
1514: rename db2 db
1515:
1516: # EVIDENCE-OF: R-54898-34554 When casting a TEXT value to REAL, the
1517: # longest possible prefix of the value that can be interpreted as a real
1518: # number is extracted from the TEXT value and the remainder ignored.
1519: #
1520: do_expr_test e_expr-29.2.1 { CAST('1.23abcd' AS REAL) } real 1.23
1521: do_expr_test e_expr-29.2.2 { CAST('1.45.23abcd' AS REAL) } real 1.45
1522: do_expr_test e_expr-29.2.3 { CAST('-2.12e-01ABC' AS REAL) } real -0.212
1523: do_expr_test e_expr-29.2.4 { CAST('1 2 3 4' AS REAL) } real 1.0
1524:
1525: # EVIDENCE-OF: R-11321-47427 Any leading spaces in the TEXT value are
1526: # ignored when converging from TEXT to REAL.
1527: #
1528: do_expr_test e_expr-29.3.1 { CAST(' 1.23abcd' AS REAL) } real 1.23
1529: do_expr_test e_expr-29.3.2 { CAST(' 1.45.23abcd' AS REAL) } real 1.45
1530: do_expr_test e_expr-29.3.3 { CAST(' -2.12e-01ABC' AS REAL) } real -0.212
1531: do_expr_test e_expr-29.3.4 { CAST(' 1 2 3 4' AS REAL) } real 1.0
1532:
1533: # EVIDENCE-OF: R-22662-28218 If there is no prefix that can be
1534: # interpreted as a real number, the result of the conversion is 0.0.
1535: #
1536: do_expr_test e_expr-29.4.1 { CAST('' AS REAL) } real 0.0
1537: do_expr_test e_expr-29.4.2 { CAST('not a number' AS REAL) } real 0.0
1538: do_expr_test e_expr-29.4.3 { CAST('XXI' AS REAL) } real 0.0
1539:
1540: # EVIDENCE-OF: R-21829-14563 When casting a BLOB value to INTEGER, the
1541: # value is first converted to TEXT.
1542: #
1543: do_expr_test e_expr-30.1.1 { CAST(X'313233' AS INTEGER) } integer 123
1544: do_expr_test e_expr-30.1.2 { CAST(X'2D363738' AS INTEGER) } integer -678
1545: do_expr_test e_expr-30.1.3 {
1546: CAST(X'31303030303030' AS INTEGER)
1547: } integer 1000000
1548: do_expr_test e_expr-30.1.4 {
1549: CAST(X'2D31313235383939393036383432363234' AS INTEGER)
1550: } integer -1125899906842624
1551:
1552: rename db db2
1553: sqlite3 db :memory:
1554: ifcapable {utf16} {
1555: execsql { PRAGMA encoding = 'utf-16be' }
1556: do_expr_test e_expr-30.1.5 { CAST(X'003100320033' AS INTEGER) } integer 123
1557: do_expr_test e_expr-30.1.6 { CAST(X'002D003600370038' AS INTEGER) } integer -678
1558: do_expr_test e_expr-30.1.7 {
1559: CAST(X'0031003000300030003000300030' AS INTEGER)
1560: } integer 1000000
1561: do_expr_test e_expr-30.1.8 {
1562: CAST(X'002D0031003100320035003800390039003900300036003800340032003600320034' AS INTEGER)
1563: } integer -1125899906842624
1564: }
1565: db close
1566: rename db2 db
1567:
1568: # EVIDENCE-OF: R-47612-45842 When casting a TEXT value to INTEGER, the
1569: # longest possible prefix of the value that can be interpreted as an
1570: # integer number is extracted from the TEXT value and the remainder
1571: # ignored.
1572: #
1573: do_expr_test e_expr-30.2.1 { CAST('123abcd' AS INT) } integer 123
1574: do_expr_test e_expr-30.2.2 { CAST('14523abcd' AS INT) } integer 14523
1575: do_expr_test e_expr-30.2.3 { CAST('-2.12e-01ABC' AS INT) } integer -2
1576: do_expr_test e_expr-30.2.4 { CAST('1 2 3 4' AS INT) } integer 1
1577:
1578: # EVIDENCE-OF: R-34400-33772 Any leading spaces in the TEXT value when
1579: # converting from TEXT to INTEGER are ignored.
1580: #
1581: do_expr_test e_expr-30.3.1 { CAST(' 123abcd' AS INT) } integer 123
1582: do_expr_test e_expr-30.3.2 { CAST(' 14523abcd' AS INT) } integer 14523
1583: do_expr_test e_expr-30.3.3 { CAST(' -2.12e-01ABC' AS INT) } integer -2
1584: do_expr_test e_expr-30.3.4 { CAST(' 1 2 3 4' AS INT) } integer 1
1585:
1586: # EVIDENCE-OF: R-43164-44276 If there is no prefix that can be
1587: # interpreted as an integer number, the result of the conversion is 0.
1588: #
1589: do_expr_test e_expr-30.4.1 { CAST('' AS INTEGER) } integer 0
1590: do_expr_test e_expr-30.4.2 { CAST('not a number' AS INTEGER) } integer 0
1591: do_expr_test e_expr-30.4.3 { CAST('XXI' AS INTEGER) } integer 0
1592:
1593: # EVIDENCE-OF: R-00741-38776 A cast of a REAL value into an INTEGER will
1594: # truncate the fractional part of the REAL.
1595: #
1596: do_expr_test e_expr-31.1.1 { CAST(3.14159 AS INTEGER) } integer 3
1597: do_expr_test e_expr-31.1.2 { CAST(1.99999 AS INTEGER) } integer 1
1598: do_expr_test e_expr-31.1.3 { CAST(-1.99999 AS INTEGER) } integer -1
1599: do_expr_test e_expr-31.1.4 { CAST(-0.99999 AS INTEGER) } integer 0
1600:
1601: # EVIDENCE-OF: R-49503-28105 If a REAL is too large to be represented as
1602: # an INTEGER then the result of the cast is the largest negative
1603: # integer: -9223372036854775808.
1604: #
1605: do_expr_test e_expr-31.2.1 { CAST(2e+50 AS INT) } integer -9223372036854775808
1606: do_expr_test e_expr-31.2.2 { CAST(-2e+50 AS INT) } integer -9223372036854775808
1607: do_expr_test e_expr-31.2.3 {
1608: CAST(-9223372036854775809.0 AS INT)
1609: } integer -9223372036854775808
1610: do_expr_test e_expr-31.2.4 {
1611: CAST(9223372036854775809.0 AS INT)
1612: } integer -9223372036854775808
1613:
1614:
1615: # EVIDENCE-OF: R-09295-61337 Casting a TEXT or BLOB value into NUMERIC
1616: # first does a forced conversion into REAL but then further converts the
1617: # result into INTEGER if and only if the conversion from REAL to INTEGER
1618: # is lossless and reversible.
1619: #
1620: do_expr_test e_expr-32.1.1 { CAST('45' AS NUMERIC) } integer 45
1621: do_expr_test e_expr-32.1.2 { CAST('45.0' AS NUMERIC) } integer 45
1622: do_expr_test e_expr-32.1.3 { CAST('45.2' AS NUMERIC) } real 45.2
1623: do_expr_test e_expr-32.1.4 { CAST('11abc' AS NUMERIC) } integer 11
1624: do_expr_test e_expr-32.1.5 { CAST('11.1abc' AS NUMERIC) } real 11.1
1625:
1626: # EVIDENCE-OF: R-30347-18702 Casting a REAL or INTEGER value to NUMERIC
1627: # is a no-op, even if a real value could be losslessly converted to an
1628: # integer.
1629: #
1630: do_expr_test e_expr-32.2.1 { CAST(13.0 AS NUMERIC) } real 13.0
1631: do_expr_test e_expr-32.2.2 { CAST(13.5 AS NUMERIC) } real 13.5
1632:
1633: do_expr_test e_expr-32.2.3 {
1634: CAST(-9223372036854775808 AS NUMERIC)
1635: } integer -9223372036854775808
1636: do_expr_test e_expr-32.2.4 {
1637: CAST(9223372036854775807 AS NUMERIC)
1638: } integer 9223372036854775807
1639:
1640: # EVIDENCE-OF: R-64550-29191 Note that the result from casting any
1641: # non-BLOB value into a BLOB and the result from casting any BLOB value
1642: # into a non-BLOB value may be different depending on whether the
1643: # database encoding is UTF-8, UTF-16be, or UTF-16le.
1644: #
1645: ifcapable {utf16} {
1646: sqlite3 db1 :memory: ; db1 eval { PRAGMA encoding = 'utf-8' }
1647: sqlite3 db2 :memory: ; db2 eval { PRAGMA encoding = 'utf-16le' }
1648: sqlite3 db3 :memory: ; db3 eval { PRAGMA encoding = 'utf-16be' }
1649: foreach {tn castexpr differs} {
1650: 1 { CAST(123 AS BLOB) } 1
1651: 2 { CAST('' AS BLOB) } 0
1652: 3 { CAST('abcd' AS BLOB) } 1
1653:
1654: 4 { CAST(X'abcd' AS TEXT) } 1
1655: 5 { CAST(X'' AS TEXT) } 0
1656: } {
1657: set r1 [db1 eval "SELECT typeof($castexpr), quote($castexpr)"]
1658: set r2 [db2 eval "SELECT typeof($castexpr), quote($castexpr)"]
1659: set r3 [db3 eval "SELECT typeof($castexpr), quote($castexpr)"]
1660:
1661: if {$differs} {
1662: set res [expr {$r1!=$r2 && $r2!=$r3}]
1663: } else {
1664: set res [expr {$r1==$r2 && $r2==$r3}]
1665: }
1666:
1667: do_test e_expr-33.1.$tn {set res} 1
1668: }
1669: db1 close
1670: db2 close
1671: db3 close
1672: }
1673:
1674: #-------------------------------------------------------------------------
1675: # Test statements related to the EXISTS and NOT EXISTS operators.
1676: #
1677: catch { db close }
1678: forcedelete test.db
1679: sqlite3 db test.db
1680:
1681: do_execsql_test e_expr-34.1 {
1682: CREATE TABLE t1(a, b);
1683: INSERT INTO t1 VALUES(1, 2);
1684: INSERT INTO t1 VALUES(NULL, 2);
1685: INSERT INTO t1 VALUES(1, NULL);
1686: INSERT INTO t1 VALUES(NULL, NULL);
1687: } {}
1688:
1689: # EVIDENCE-OF: R-25588-27181 The EXISTS operator always evaluates to one
1690: # of the integer values 0 and 1.
1691: #
1692: # This statement is not tested by itself. Instead, all e_expr-34.* tests
1693: # following this point explicitly test that specific invocations of EXISTS
1694: # return either integer 0 or integer 1.
1695: #
1696:
1697: # EVIDENCE-OF: R-58553-63740 If executing the SELECT statement specified
1698: # as the right-hand operand of the EXISTS operator would return one or
1699: # more rows, then the EXISTS operator evaluates to 1.
1700: #
1701: foreach {tn expr} {
1702: 1 { EXISTS ( SELECT a FROM t1 ) }
1703: 2 { EXISTS ( SELECT b FROM t1 ) }
1704: 3 { EXISTS ( SELECT 24 ) }
1705: 4 { EXISTS ( SELECT NULL ) }
1706: 5 { EXISTS ( SELECT a FROM t1 WHERE a IS NULL ) }
1707: } {
1708: do_expr_test e_expr-34.2.$tn $expr integer 1
1709: }
1710:
1711: # EVIDENCE-OF: R-19673-40972 If executing the SELECT would return no
1712: # rows at all, then the EXISTS operator evaluates to 0.
1713: #
1714: foreach {tn expr} {
1715: 1 { EXISTS ( SELECT a FROM t1 WHERE 0) }
1716: 2 { EXISTS ( SELECT b FROM t1 WHERE a = 5) }
1717: 3 { EXISTS ( SELECT 24 WHERE 0) }
1718: 4 { EXISTS ( SELECT NULL WHERE 1=2) }
1719: } {
1720: do_expr_test e_expr-34.3.$tn $expr integer 0
1721: }
1722:
1723: # EVIDENCE-OF: R-35109-49139 The number of columns in each row returned
1724: # by the SELECT statement (if any) and the specific values returned have
1725: # no effect on the results of the EXISTS operator.
1726: #
1727: foreach {tn expr res} {
1728: 1 { EXISTS ( SELECT * FROM t1 ) } 1
1729: 2 { EXISTS ( SELECT *, *, * FROM t1 ) } 1
1730: 3 { EXISTS ( SELECT 24, 25 ) } 1
1731: 4 { EXISTS ( SELECT NULL, NULL, NULL ) } 1
1732: 5 { EXISTS ( SELECT a,b,a||b FROM t1 WHERE a IS NULL ) } 1
1733:
1734: 6 { EXISTS ( SELECT a, a FROM t1 WHERE 0) } 0
1735: 7 { EXISTS ( SELECT b, b, a FROM t1 WHERE a = 5) } 0
1736: 8 { EXISTS ( SELECT 24, 46, 89 WHERE 0) } 0
1737: 9 { EXISTS ( SELECT NULL, NULL WHERE 1=2) } 0
1738: } {
1739: do_expr_test e_expr-34.4.$tn $expr integer $res
1740: }
1741:
1742: # EVIDENCE-OF: R-10645-12439 In particular, rows containing NULL values
1743: # are not handled any differently from rows without NULL values.
1744: #
1745: foreach {tn e1 e2} {
1746: 1 { EXISTS (SELECT 'not null') } { EXISTS (SELECT NULL) }
1747: 2 { EXISTS (SELECT NULL FROM t1) } { EXISTS (SELECT 'bread' FROM t1) }
1748: } {
1749: set res [db one "SELECT $e1"]
1750: do_expr_test e_expr-34.5.${tn}a $e1 integer $res
1751: do_expr_test e_expr-34.5.${tn}b $e2 integer $res
1752: }
1753:
1754: #-------------------------------------------------------------------------
1755: # Test statements related to scalar sub-queries.
1756: #
1757:
1758: catch { db close }
1759: forcedelete test.db
1760: sqlite3 db test.db
1761: do_test e_expr-35.0 {
1762: execsql {
1763: CREATE TABLE t2(a, b);
1764: INSERT INTO t2 VALUES('one', 'two');
1765: INSERT INTO t2 VALUES('three', NULL);
1766: INSERT INTO t2 VALUES(4, 5.0);
1767: }
1768: } {}
1769:
1770: # EVIDENCE-OF: R-00980-39256 A SELECT statement enclosed in parentheses
1771: # may appear as a scalar quantity.
1772: #
1773: # EVIDENCE-OF: R-56294-03966 All types of SELECT statement, including
1774: # aggregate and compound SELECT queries (queries with keywords like
1775: # UNION or EXCEPT) are allowed as scalar subqueries.
1776: #
1777: do_expr_test e_expr-35.1.1 { (SELECT 35) } integer 35
1778: do_expr_test e_expr-35.1.2 { (SELECT NULL) } null {}
1779:
1780: do_expr_test e_expr-35.1.3 { (SELECT count(*) FROM t2) } integer 3
1781: do_expr_test e_expr-35.1.4 { (SELECT 4 FROM t2) } integer 4
1782:
1783: do_expr_test e_expr-35.1.5 {
1784: (SELECT b FROM t2 UNION SELECT a+1 FROM t2)
1785: } null {}
1786: do_expr_test e_expr-35.1.6 {
1787: (SELECT a FROM t2 UNION SELECT COALESCE(b, 55) FROM t2 ORDER BY 1)
1788: } integer 4
1789:
1790: # EVIDENCE-OF: R-46899-53765 A SELECT used as a scalar quantity must
1791: # return a result set with a single column.
1792: #
1793: # The following block tests that errors are returned in a bunch of cases
1794: # where a subquery returns more than one column.
1795: #
1796: set M {only a single result allowed for a SELECT that is part of an expression}
1797: foreach {tn sql} {
1798: 1 { SELECT (SELECT * FROM t2 UNION SELECT a+1, b+1 FROM t2) }
1799: 2 { SELECT (SELECT * FROM t2 UNION SELECT a+1, b+1 FROM t2 ORDER BY 1) }
1800: 3 { SELECT (SELECT 1, 2) }
1801: 4 { SELECT (SELECT NULL, NULL, NULL) }
1802: 5 { SELECT (SELECT * FROM t2) }
1803: 6 { SELECT (SELECT * FROM (SELECT 1, 2, 3)) }
1804: } {
1805: do_catchsql_test e_expr-35.2.$tn $sql [list 1 $M]
1806: }
1807:
1808: # EVIDENCE-OF: R-35764-28041 The result of the expression is the value
1809: # of the only column in the first row returned by the SELECT statement.
1810: #
1811: # EVIDENCE-OF: R-41898-06686 If the SELECT yields more than one result
1812: # row, all rows after the first are ignored.
1813: #
1814: do_execsql_test e_expr-36.3.1 {
1815: CREATE TABLE t4(x, y);
1816: INSERT INTO t4 VALUES(1, 'one');
1817: INSERT INTO t4 VALUES(2, 'two');
1818: INSERT INTO t4 VALUES(3, 'three');
1819: } {}
1820:
1821: foreach {tn expr restype resval} {
1822: 2 { ( SELECT x FROM t4 ORDER BY x ) } integer 1
1823: 3 { ( SELECT x FROM t4 ORDER BY y ) } integer 1
1824: 4 { ( SELECT x FROM t4 ORDER BY x DESC ) } integer 3
1825: 5 { ( SELECT x FROM t4 ORDER BY y DESC ) } integer 2
1826: 6 { ( SELECT y FROM t4 ORDER BY y DESC ) } text two
1827:
1828: 7 { ( SELECT sum(x) FROM t4 ) } integer 6
1829: 8 { ( SELECT group_concat(y,'') FROM t4 ) } text onetwothree
1830: 9 { ( SELECT max(x) FROM t4 WHERE y LIKE '___') } integer 2
1831:
1832: } {
1833: do_expr_test e_expr-36.3.$tn $expr $restype $resval
1834: }
1835:
1836: # EVIDENCE-OF: R-25492-41572 If the SELECT yields no rows, then the
1837: # value of the expression is NULL.
1838: #
1839: foreach {tn expr} {
1840: 1 { ( SELECT x FROM t4 WHERE x>3 ORDER BY x ) }
1841: 2 { ( SELECT x FROM t4 WHERE y<'one' ORDER BY y ) }
1842: } {
1843: do_expr_test e_expr-36.4.$tn $expr null {}
1844: }
1845:
1846:
1847: finish_test
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