--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/interrupt.test	Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,183 @@
+# 2004 Feb 8
+#
+# 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.  The
+# focus of this script is the sqlite_interrupt() API.
+#
+# $Id: interrupt.test,v 1.16 2008/01/16 17:46:38 drh Exp $
+
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set DB [sqlite3_connection_pointer db]
+
+# This routine attempts to execute the sql in $sql.  It triggers an
+# interrupt at progressively later and later points during the processing
+# and checks to make sure SQLITE_INTERRUPT is returned.  Eventually,
+# the routine completes successfully.
+#
+proc interrupt_test {testid sql result {initcnt 0}} {
+  set orig_sum [cksum]
+  set i $initcnt
+  while 1 {
+    incr i
+    set ::sqlite_interrupt_count $i
+    do_test $testid.$i.1 [format {
+      set ::r [catchsql %s]
+      set ::code [db errorcode]
+      expr {$::code==0 || $::code==9}
+    } [list $sql]] 1
+    if {$::code==9} {
+      do_test $testid.$i.2 {
+        cksum
+      } $orig_sum
+    } else {
+      do_test $testid.$i.99 {
+        set ::r
+      } [list 0 $result]
+      break
+    }
+  }
+  set ::sqlite_interrupt_count 0
+}
+
+do_test interrupt-1.1 {
+  execsql {
+    CREATE TABLE t1(a,b);
+    SELECT name FROM sqlite_master;
+  }
+} {t1}
+interrupt_test interrupt-1.2 {DROP TABLE t1} {}
+do_test interrupt-1.3 {
+  execsql {
+    SELECT name FROM sqlite_master;
+  }
+} {}
+integrity_check interrupt-1.4
+
+do_test interrrupt-2.1 {
+  execsql {
+    BEGIN;
+    CREATE TABLE t1(a,b);
+    INSERT INTO t1 VALUES(1,randstr(300,400));
+    INSERT INTO t1 SELECT a+1, randstr(300,400) FROM t1;
+    INSERT INTO t1 SELECT a+2, a || '-' || b FROM t1;
+    INSERT INTO t1 SELECT a+4, a || '-' || b FROM t1;
+    INSERT INTO t1 SELECT a+8, a || '-' || b FROM t1;
+    INSERT INTO t1 SELECT a+16, a || '-' || b FROM t1;
+    INSERT INTO t1 SELECT a+32, a || '-' || b FROM t1;
+    COMMIT;
+    UPDATE t1 SET b=substr(b,-5,5);
+    SELECT count(*) from t1;
+  }
+} 64
+set origsize [file size test.db]
+set cksum [db eval {SELECT md5sum(a || b) FROM t1}]
+ifcapable {vacuum} {
+  interrupt_test interrupt-2.2 {VACUUM} {} 100
+}
+do_test interrupt-2.3 {
+  execsql {
+    SELECT md5sum(a || b) FROM t1;
+  }
+} $cksum
+ifcapable {vacuum && !default_autovacuum} {
+  do_test interrupt-2.4 {
+    expr {$::origsize>[file size test.db]}
+  } 1
+}
+ifcapable {explain} {
+  do_test interrupt-2.5 {
+    set sql {EXPLAIN SELECT max(a,b), a, b FROM t1}
+    execsql $sql
+    set rc [catch {db eval $sql {sqlite3_interrupt $DB}} msg]
+    lappend rc $msg
+  } {1 interrupted}
+}
+integrity_check interrupt-2.6
+
+# Ticket #594.  If an interrupt occurs in the middle of a transaction
+# and that transaction is later rolled back, the internal schema tables do
+# not reset.
+#
+# UPDATE: Interrupting a DML statement in the middle of a transaction now
+# causes the transaction to roll back. Leaving the transaction open after
+# an SQL statement was interrupted halfway through risks database corruption.
+#
+ifcapable tempdb {
+  for {set i 1} {$i<50} {incr i 5} {
+    do_test interrupt-3.$i.1 {
+      execsql {
+        BEGIN;
+        CREATE TEMP TABLE t2(x,y);
+        SELECT name FROM sqlite_temp_master;
+      }
+    } {t2}
+    do_test interrupt-3.$i.2 {
+      set ::sqlite_interrupt_count $::i
+      catchsql {
+        INSERT INTO t2 SELECT * FROM t1;
+      }
+    } {1 interrupted}
+    do_test interrupt-3.$i.3 {
+      execsql {
+        SELECT name FROM sqlite_temp_master;
+      }
+    } {}
+    do_test interrupt-3.$i.4 {
+      catchsql {
+        ROLLBACK
+      }
+    } {1 {cannot rollback - no transaction is active}}
+    do_test interrupt-3.$i.5 {
+      catchsql {SELECT name FROM sqlite_temp_master};
+      execsql {
+        SELECT name FROM sqlite_temp_master;
+      }
+    } {}
+  }
+}
+
+# There are reports of a memory leak if an interrupt occurs during
+# the beginning of a complex query - before the first callback.  We
+# will try to reproduce it here:
+#
+execsql {
+  CREATE TABLE t2(a,b,c);
+  INSERT INTO t2 SELECT round(a/10), randstr(50,80), randstr(50,60) FROM t1;
+}
+set sql {
+  SELECT max(min(b,c)), min(max(b,c)), a FROM t2 GROUP BY a ORDER BY a;
+}
+set sqlite_interrupt_count 1000000
+execsql $sql
+set max_count [expr {1000000-$sqlite_interrupt_count}]
+for {set i 1} {$i<$max_count-5} {incr i 1} {
+  do_test interrupt-4.$i.1 {
+    set ::sqlite_interrupt_count $::i
+    catchsql $sql
+  } {1 interrupted}
+}
+
+# Interrupt during parsing
+#
+do_test interrupt-5.1 {
+  proc fake_interrupt {args} {
+    db collate fake_collation no-op
+    sqlite3_interrupt db
+    return SQLITE_OK
+  }
+  db collation_needed fake_interrupt
+  catchsql {
+    CREATE INDEX fake ON fake1(a COLLATE fake_collation, b, c DESC);
+  }
+} {1 interrupt}
+
+finish_test