# 2009 November 10 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # Additional test cases for the COALESCE() and IFNULL() functions. # set testdir [file dirname $argv0] source $testdir/tester.tcl do_test coalesce-1.0 { db eval { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d); INSERT INTO t1 VALUES(1, null, null, null); INSERT INTO t1 VALUES(2, 2, 99, 99); INSERT INTO t1 VALUES(3, null, 3, 99); INSERT INTO t1 VALUES(4, null, null, 4); INSERT INTO t1 VALUES(5, null, null, null); INSERT INTO t1 VALUES(6, 22, 99, 99); INSERT INTO t1 VALUES(7, null, 33, 99); INSERT INTO t1 VALUES(8, null, null, 44); SELECT coalesce(b,c,d) FROM t1 ORDER BY a; } } {{} 2 3 4 {} 22 33 44} do_test coalesce-1.1 { db eval { SELECT coalesce(d+c+b,d+c,d) FROM t1 ORDER BY a; } } {{} 200 102 4 {} 220 132 44} do_test coalesce-1.2 { db eval { SELECT ifnull(d+c+b,ifnull(d+c,d)) FROM t1 ORDER BY a; } } {{} 200 102 4 {} 220 132 44} do_test coalesce-1.3 { db eval { SELECT ifnull(ifnull(d+c+b,d+c),d) FROM t1 ORDER BY a; } } {{} 200 102 4 {} 220 132 44} do_test coalesce-1.4 { db eval { SELECT ifnull(ifnull(b,c),d) FROM t1 ORDER BY a; } } {{} 2 3 4 {} 22 33 44} do_test coalesce-1.5 { db eval { SELECT ifnull(b,ifnull(c,d)) FROM t1 ORDER BY a; } } {{} 2 3 4 {} 22 33 44} do_test coalesce-1.6 { db eval { SELECT coalesce(b,NOT b,-b,abs(b),lower(b),length(b),min(b,5),b*123,c) FROM t1 ORDER BY a; } } {{} 2 3 {} {} 22 33 {}} do_test coalesce-1.7 { db eval { SELECT ifnull(nullif(a,4),99) FROM t1 ORDER BY a; } } {1 2 3 99 5 6 7 8} do_test coalesce-1.8 { db eval { pragma vdbe_listing=on; SELECT coalesce( CASE WHEN b=2 THEN 123 END, CASE WHEN b=3 THEN 234 END, CASE WHEN c=3 THEN 345 WHEN c=33 THEN 456 END, d ) FROM t1 ORDER BY a; } } {{} 123 345 4 {} 99 456 44} finish_test