Import SQLite 3.7.6.3.

third_party/sqlite/src/test/tkt-b72787b1.test

+# 2011 February 21
+#
+# 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.
+#
+# This file implements tests to verify that ticket [b72787b1a7] has been
+# fixed.  From the ticket:
+#
+#     The sqlite3ExpirePreparedStatements routine marks all statements
+#     as expired. This includes statements that are not expired.
+#
+#     Steps to reproduce:
+#
+#        * Prepare a statement (A)
+#        * Alter the schema to invalidate cookie in A
+#        * Prepare a statement (B)
+#        * Run B and have A run as part of B
+#        * A will find a bad cookie and cause *all* statements
+#          to be expired including the currently running B by calling
+#          sqlite3ExpirePreparedStatements
+#        * When control returns to B it will then abort 
+#
+#     The bug is that sqlite3ExpirePreparedStatements expires all statements.
+#     Note that B was prepared after the schema change and hence is perfectly
+#     valid and then is marked as expired while running.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+unset -nocomplain ::STMT
+proc runsql {} {
+  db eval {CREATE TABLE IF NOT EXISTS t4(q)}
+  sqlite3_step $::STMT
+  set rc [sqlite3_column_int $::STMT 0]
+  sqlite3_reset $::STMT
+  return $rc
+}
+
+do_test tkt-b72787b1.1 {
+  db eval {
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(1);
+    INSERT INTO t1 VALUES(2);
+    CREATE TABLE t2(y);
+    INSERT INTO t2 SELECT x+2 FROM t1;
+    INSERT INTO t2 SELECT x+4 FROM t1;
+  }
+  db func runsql ::runsql
+  set DB [sqlite3_connection_pointer db]
+  set sql {SELECT max(x) FROM t1}
+  set ::STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL]
+
+  # The runsql() call on the second row of the first query will
+  # cause all $::STMT to hit an expired cookie.  Prior to the fix
+  # for [b72787b1a7, the bad cookie would expire all statements, including
+  # the following compound SELECT, which would cause a fault when the
+  # second SELECT was reached.  After the fix, the current statement
+  # continues to completion.
+  db eval {
+    SELECT CASE WHEN y=3 THEN y+100 WHEN y==4 THEN runsql()+200
+                ELSE 300+y END FROM t2
+    UNION ALL
+    SELECT * FROM t1;
+  }
+} {103 202 305 306 1 2}
+
+sqlite3_finalize $::STMT
+
+finish_test