[sql] Import reference version of SQLite 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/tkt-fa7bf5ec.test

+# 2011 October 13
+#
+# 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 implements regression tests for SQLite library. Specifically,
+# it tests that ticket [fa7bf5ec94801e7e2030e41eefe5d9dd96eaacfd] has
+# been resolved.
+#
+# The problem described by this ticket was that the sqlite3ExprCompare()
+# function was saying that expressions (x='a') and (x='A') were identical
+# because it was using sqlite3StrICmp() instead of strcmp() to compare string
+# literals.  That was causing the query optimizer for aggregate queries to 
+# believe that both count() operations were identical, and thus only 
+# computing the first count() and making a copy of the result for the 
+# second count().
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+do_test tkt-fa7bf5ec-1 {
+  execsql {
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES ('a');
+    INSERT INTO t1 VALUES ('A');
+    INSERT INTO t1 VALUES ('A');
+    SELECT count(CASE WHEN x='a' THEN 1 END),
+           count(CASE WHEN x='A' THEN 1 END)
+      FROM t1;
+  }
+} {1 2}
+
+finish_test