changeset:   102919:030e100f048a
branch:      2.7
parent:      102912:24e580e667fb
user:        Berker Peksag <berker.peksag@gmail.com>
date:        Fri Aug 26 22:19:05 2016 +0300
files:       Lib/sqlite3/test/regression.py Misc/NEWS Modules/_sqlite/connection.c
description:
Issue #10513: Fix a regression in Connection.commit()

Statements should not be reset after a commit.

Backported from https://github.com/ghaering/pysqlite/commit/029050896b1e6058573abeef5a8970384c0c7faa


diff -r 24e580e667fb -r 030e100f048a Lib/sqlite3/test/regression.py
--- a/Lib/sqlite3/test/regression.py	Thu Aug 25 20:04:08 2016 -0400
+++ b/Lib/sqlite3/test/regression.py	Fri Aug 26 22:19:05 2016 +0300
@@ -328,6 +328,36 @@
         self.assertRaises(ValueError, cur.execute, " \0select 2")
         self.assertRaises(ValueError, cur.execute, "select 2\0")
 
+    def CheckCommitCursorReset(self):
+        """
+        Connection.commit() did reset cursors, which made sqlite3
+        to return rows multiple times when fetched from cursors
+        after commit. See issues 10513 and 23129 for details.
+        """
+        con = sqlite.connect(":memory:")
+        con.executescript("""
+        create table t(c);
+        create table t2(c);
+        insert into t values(0);
+        insert into t values(1);
+        insert into t values(2);
+        """)
+
+        self.assertEqual(con.isolation_level, "")
+
+        counter = 0
+        for i, row in enumerate(con.execute("select c from t")):
+            con.execute("insert into t2(c) values (?)", (i,))
+            con.commit()
+            if counter == 0:
+                self.assertEqual(row[0], 0)
+            elif counter == 1:
+                self.assertEqual(row[0], 1)
+            elif counter == 2:
+                self.assertEqual(row[0], 2)
+            counter += 1
+        self.assertEqual(counter, 3, "should have returned exactly three rows")
+
 
 def suite():
     regression_suite = unittest.makeSuite(RegressionTests, "Check")
diff -r 24e580e667fb -r 030e100f048a Misc/NEWS
--- a/Misc/NEWS	Thu Aug 25 20:04:08 2016 -0400
+++ b/Misc/NEWS	Fri Aug 26 22:19:05 2016 +0300
@@ -33,6 +33,9 @@
 Library
 -------
 
+- Issue #10513: Fix a regression in Connection.commit().  Statements should
+  not be reset after a commit.
+
 - Issue #2466: posixpath.ismount now correctly recognizes mount points which
   the user does not have permission to access.
 
diff -r 24e580e667fb -r 030e100f048a Modules/_sqlite/connection.c
--- a/Modules/_sqlite/connection.c	Thu Aug 25 20:04:08 2016 -0400
+++ b/Modules/_sqlite/connection.c	Fri Aug 26 22:19:05 2016 +0300
@@ -458,7 +458,6 @@
     }
 
     if (self->inTransaction) {
-        pysqlite_do_all_statements(self, ACTION_RESET, 0);
 
         Py_BEGIN_ALLOW_THREADS
         rc = sqlite3_prepare(self->db, "COMMIT", -1, &statement, &tail);