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| 1 # 2009 November 10 | |
| 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 # Additional test cases for the COALESCE() and IFNULL() functions. | |
| 12 # | |
| 13 | |
| 14 set testdir [file dirname $argv0] | |
| 15 source $testdir/tester.tcl | |
| 16 | |
| 17 | |
| 18 do_test coalesce-1.0 { | |
| 19 db eval { | |
| 20 CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d); | |
| 21 INSERT INTO t1 VALUES(1, null, null, null); | |
| 22 INSERT INTO t1 VALUES(2, 2, 99, 99); | |
| 23 INSERT INTO t1 VALUES(3, null, 3, 99); | |
| 24 INSERT INTO t1 VALUES(4, null, null, 4); | |
| 25 INSERT INTO t1 VALUES(5, null, null, null); | |
| 26 INSERT INTO t1 VALUES(6, 22, 99, 99); | |
| 27 INSERT INTO t1 VALUES(7, null, 33, 99); | |
| 28 INSERT INTO t1 VALUES(8, null, null, 44); | |
| 29 | |
| 30 SELECT coalesce(b,c,d) FROM t1 ORDER BY a; | |
| 31 } | |
| 32 } {{} 2 3 4 {} 22 33 44} | |
| 33 do_test coalesce-1.1 { | |
| 34 db eval { | |
| 35 SELECT coalesce(d+c+b,d+c,d) FROM t1 ORDER BY a; | |
| 36 } | |
| 37 } {{} 200 102 4 {} 220 132 44} | |
| 38 do_test coalesce-1.2 { | |
| 39 db eval { | |
| 40 SELECT ifnull(d+c+b,ifnull(d+c,d)) FROM t1 ORDER BY a; | |
| 41 } | |
| 42 } {{} 200 102 4 {} 220 132 44} | |
| 43 do_test coalesce-1.3 { | |
| 44 db eval { | |
| 45 SELECT ifnull(ifnull(d+c+b,d+c),d) FROM t1 ORDER BY a; | |
| 46 } | |
| 47 } {{} 200 102 4 {} 220 132 44} | |
| 48 do_test coalesce-1.4 { | |
| 49 db eval { | |
| 50 SELECT ifnull(ifnull(b,c),d) FROM t1 ORDER BY a; | |
| 51 } | |
| 52 } {{} 2 3 4 {} 22 33 44} | |
| 53 do_test coalesce-1.5 { | |
| 54 db eval { | |
| 55 SELECT ifnull(b,ifnull(c,d)) FROM t1 ORDER BY a; | |
| 56 } | |
| 57 } {{} 2 3 4 {} 22 33 44} | |
| 58 do_test coalesce-1.6 { | |
| 59 db eval { | |
| 60 SELECT coalesce(b,NOT b,-b,abs(b),lower(b),length(b),min(b,5),b*123,c) | |
| 61 FROM t1 ORDER BY a; | |
| 62 } | |
| 63 } {{} 2 3 {} {} 22 33 {}} | |
| 64 do_test coalesce-1.7 { | |
| 65 db eval { | |
| 66 SELECT ifnull(nullif(a,4),99) | |
| 67 FROM t1 ORDER BY a; | |
| 68 } | |
| 69 } {1 2 3 99 5 6 7 8} | |
| 70 do_test coalesce-1.8 { | |
| 71 db eval { | |
| 72 pragma vdbe_listing=on; | |
| 73 SELECT coalesce( | |
| 74 CASE WHEN b=2 THEN 123 END, | |
| 75 CASE WHEN b=3 THEN 234 END, | |
| 76 CASE WHEN c=3 THEN 345 WHEN c=33 THEN 456 END, | |
| 77 d | |
| 78 ) | |
| 79 FROM t1 ORDER BY a; | |
| 80 } | |
| 81 } {{} 123 345 4 {} 99 456 44} | |
| 82 | |
| 83 | |
| 84 finish_test | |
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