Additional test cases for the coalesce() and ifnull() functions.

FossilOrigin-Name: d0591258b62df4fa610b7ac2a2af0344cf82f231

manifest

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-C Generate\sVDBE\scode\sfor\sthe\sbuilt-in\sCOALESCE()\sand\sIFNULL()\sfunctions.\s\sThis\nallows\sunused\sarguments\sto\snever\sbe\sevaluated,\swhich\sis\sa\sperformance\swin\swhen\nthe\sunused\sargument\sis\sa\ssubquery.
-D 2009-11-11T00:24:32
+C Additional\stest\scases\sfor\sthe\scoalesce()\sand\sifnull()\sfunctions.
+D 2009-11-11T01:14:18
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 53f3dfa49f28ab5b80cb083fb7c9051e596bcfa1
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -276,6 +276,7 @@ F test/capi3c.test d9d293ce8fd4dc2944ce2dae5718fc7a6184a567
 F test/capi3d.test 57d83b690d7364bde02cddbf8339a4b50d80ce23
 F test/cast.test 166951664a0b0a2e0f8fb5997a152490c6363932
 F test/check.test b897cd3cc839b34b31cdd073e9882ccd03da977b
+F test/coalesce.test cee0dccb9fbd2d494b77234bccf9dc6c6786eb91
 F test/collate1.test e3eaa48c21e150814be1a7b852d2a8af24458d04
 F test/collate2.test 04cebe4a033be319d6ddbb3bbc69464e01700b49
 F test/collate3.test d28d2cfab2c3a3d4628ae4b2b7afc9965daa3b4c
@@ -769,14 +770,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
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manifest.uuid

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-30055b257c3c65f8123cad5ac6c62c4c6ca2c900
+d0591258b62df4fa610b7ac2a2af0344cf82f231

test/coalesce.test

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+# 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