Fix a bug in the logic that converts numbers into strings inside the VM.

Ticket #844 (CVS 1878)

FossilOrigin-Name: 863540be248d3079e1a997349be6c74199149511

test/trigger5.test

@@ -0,0 +1,39 @@
+# 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.
+#
+#***********************************************************************
+#
+# This file tests the triggers of views.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Ticket #844
+#
+do_test trigger5-1.1 {
+  execsql {
+    CREATE TABLE Item(
+       a integer PRIMARY KEY NOT NULL ,
+       b double NULL ,
+       c int NOT NULL DEFAULT 0
+    );
+    CREATE TABLE Undo(UndoAction TEXT);
+    INSERT INTO Item VALUES (1,38205.60865,340);
+    CREATE TRIGGER trigItem_UNDO_AD AFTER DELETE ON Item FOR EACH ROW
+    BEGIN
+      INSERT INTO Undo SELECT 'INSERT INTO Item (a,b,c) VALUES ('
+       || coalesce(old.a,'NULL') || ',' || quote(old.b) || ',' || old.c || ');';
+    END;
+    DELETE FROM Item WHERE a = 1;
+    SELECT * FROM Undo;
+  }
+} {{INSERT INTO Item (a,b,c) VALUES (1,38205.60865,340);}}
+
+integrity_check trigger5-99.9
+
+finish_test