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 85
