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Merge branch 'withhold-transactions'

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This commit is contained in:
Daniele Varrazzo 2014-08-21 05:55:11 +01:00
commit 6a5f778361
5 changed files with 69 additions and 18 deletions
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3
NEWS
View File

@ -18,6 +18,9 @@ What's new in psycopg 2.5.4
proper methods (:ticket:`#219`).
- Force conversion of pool arguments to integer to avoid potentially unbounded
pools (:ticket:`#220`).
- Cursors :sql:`WITH HOLD` don't begin a new transaction upon move/fetch/close
(:ticket:`#228`).
- Cursors :sql:`WITH HOLD` can be used in autocommit (:ticket:`#229`).
- Don't ignore silently the `cursor.callproc` argument without a length.
- Added a few errors missing from `~psycopg2.errorcodes`, defined by
PostgreSQL but not documented.

22
psycopg/cursor_type.c
View File

@ -63,7 +63,7 @@ psyco_curs_close(cursorObject *self)
EXC_IF_NO_MARK(self);
PyOS_snprintf(buffer, 127, "CLOSE \"%s\"", self->name);
if (pq_execute(self, buffer, 0, 0) == -1) return NULL;
if (pq_execute(self, buffer, 0, 0, 1) == -1) return NULL;
}
self->closed = 1;
@ -444,7 +444,7 @@ _psyco_curs_execute(cursorObject *self,
/* At this point, the SQL statement must be str, not unicode */
tmp = pq_execute(self, Bytes_AS_STRING(self->query), async, no_result);
tmp = pq_execute(self, Bytes_AS_STRING(self->query), async, no_result, 0);
Dprintf("psyco_curs_execute: res = %d, pgres = %p", tmp, self->pgres);
if (tmp < 0) { goto exit; }
@ -478,7 +478,7 @@ psyco_curs_execute(cursorObject *self, PyObject *args, PyObject *kwargs)
"can't call .execute() on named cursors more than once");
return NULL;
}
if (self->conn->autocommit) {
if (self->conn->autocommit && !self->withhold) {
psyco_set_error(ProgrammingError, self,
"can't use a named cursor outside of transactions");
return NULL;
@ -766,7 +766,7 @@ psyco_curs_fetchone(cursorObject *self)
EXC_IF_ASYNC_IN_PROGRESS(self, fetchone);
EXC_IF_TPC_PREPARED(self->conn, fetchone);
PyOS_snprintf(buffer, 127, "FETCH FORWARD 1 FROM \"%s\"", self->name);
if (pq_execute(self, buffer, 0, 0) == -1) return NULL;
if (pq_execute(self, buffer, 0, 0, self->withhold) == -1) return NULL;
if (_psyco_curs_prefetch(self) < 0) return NULL;
}
@ -816,7 +816,7 @@ psyco_curs_next_named(cursorObject *self)
PyOS_snprintf(buffer, 127, "FETCH FORWARD %ld FROM \"%s\"",
self->itersize, self->name);
if (pq_execute(self, buffer, 0, 0) == -1) return NULL;
if (pq_execute(self, buffer, 0, 0, self->withhold) == -1) return NULL;
if (_psyco_curs_prefetch(self) < 0) return NULL;
}
@ -885,7 +885,7 @@ psyco_curs_fetchmany(cursorObject *self, PyObject *args, PyObject *kwords)
EXC_IF_TPC_PREPARED(self->conn, fetchone);
PyOS_snprintf(buffer, 127, "FETCH FORWARD %d FROM \"%s\"",
(int)size, self->name);
if (pq_execute(self, buffer, 0, 0) == -1) { goto exit; }
if (pq_execute(self, buffer, 0, 0, self->withhold) == -1) { goto exit; }
if (_psyco_curs_prefetch(self) < 0) { goto exit; }
}
@ -960,7 +960,7 @@ psyco_curs_fetchall(cursorObject *self)
EXC_IF_ASYNC_IN_PROGRESS(self, fetchall);
EXC_IF_TPC_PREPARED(self->conn, fetchall);
PyOS_snprintf(buffer, 127, "FETCH FORWARD ALL FROM \"%s\"", self->name);
if (pq_execute(self, buffer, 0, 0) == -1) { goto exit; }
if (pq_execute(self, buffer, 0, 0, self->withhold) == -1) { goto exit; }
if (_psyco_curs_prefetch(self) < 0) { goto exit; }
}
@ -1178,7 +1178,7 @@ psyco_curs_scroll(cursorObject *self, PyObject *args, PyObject *kwargs)
else {
PyOS_snprintf(buffer, 127, "MOVE %d FROM \"%s\"", value, self->name);
}
if (pq_execute(self, buffer, 0, 0) == -1) return NULL;
if (pq_execute(self, buffer, 0, 0, self->withhold) == -1) return NULL;
if (_psyco_curs_prefetch(self) < 0) return NULL;
}
@ -1391,7 +1391,7 @@ psyco_curs_copy_from(cursorObject *self, PyObject *args, PyObject *kwargs)
Py_INCREF(file);
self->copyfile = file;
if (pq_execute(self, query, 0, 0) >= 0) {
if (pq_execute(self, query, 0, 0, 0) >= 0) {
res = Py_None;
Py_INCREF(Py_None);
}
@ -1485,7 +1485,7 @@ psyco_curs_copy_to(cursorObject *self, PyObject *args, PyObject *kwargs)
Py_INCREF(file);
self->copyfile = file;
if (pq_execute(self, query, 0, 0) >= 0) {
if (pq_execute(self, query, 0, 0, 0) >= 0) {
res = Py_None;
Py_INCREF(Py_None);
}
@ -1559,7 +1559,7 @@ psyco_curs_copy_expert(cursorObject *self, PyObject *args, PyObject *kwargs)
self->copyfile = file;
/* At this point, the SQL statement must be str, not unicode */
if (pq_execute(self, Bytes_AS_STRING(sql), 0, 0) >= 0) {
if (pq_execute(self, Bytes_AS_STRING(sql), 0, 0, 0) >= 0) {
res = Py_None;
Py_INCREF(res);
}

4
psycopg/pqpath.c
View File

@ -893,7 +893,7 @@ pq_flush(connectionObject *conn)
*/
RAISES_NEG int
pq_execute(cursorObject *curs, const char *query, int async, int no_result)
pq_execute(cursorObject *curs, const char *query, int async, int no_result, int no_begin)
{
PGresult *pgres = NULL;
char *error = NULL;
@ -916,7 +916,7 @@ pq_execute(cursorObject *curs, const char *query, int async, int no_result)
Py_BEGIN_ALLOW_THREADS;
pthread_mutex_lock(&(curs->conn->lock));
if (pq_begin_locked(curs->conn, &pgres, &error, &_save) < 0) {
if (!no_begin && pq_begin_locked(curs->conn, &pgres, &error, &_save) < 0) {
pthread_mutex_unlock(&(curs->conn->lock));
Py_BLOCK_THREADS;
pq_complete_error(curs->conn, &pgres, &error);

2
psycopg/pqpath.h
View File

@ -36,7 +36,7 @@
HIDDEN PGresult *pq_get_last_result(connectionObject *conn);
RAISES_NEG HIDDEN int pq_fetch(cursorObject *curs, int no_result);
RAISES_NEG HIDDEN int pq_execute(cursorObject *curs, const char *query,
int async, int no_result);
int async, int no_result, int no_begin);
HIDDEN int pq_send_query(connectionObject *conn, const char *query);
HIDDEN int pq_begin_locked(connectionObject *conn, PGresult **pgres,
char **error, PyThreadState **tstate);

56
tests/test_cursor.py
View File

@ -176,10 +176,7 @@ class CursorTests(ConnectingTestCase):
curs.execute("select data from invname order by data")
self.assertEqual(curs.fetchall(), [(10,), (20,), (30,)])
def test_withhold(self):
self.assertRaises(psycopg2.ProgrammingError, self.conn.cursor,
withhold=True)
def _create_withhold_table(self):
curs = self.conn.cursor()
try:
curs.execute("drop table withhold")
@ -190,6 +187,11 @@ class CursorTests(ConnectingTestCase):
curs.execute("insert into withhold values (%s)", (i,))
curs.close()
def test_withhold(self):
self.assertRaises(psycopg2.ProgrammingError, self.conn.cursor,
withhold=True)
self._create_withhold_table()
curs = self.conn.cursor("W")
self.assertEqual(curs.withhold, False);
curs.withhold = True
@ -209,6 +211,52 @@ class CursorTests(ConnectingTestCase):
curs.execute("drop table withhold")
self.conn.commit()
def test_withhold_no_begin(self):
self._create_withhold_table()
curs = self.conn.cursor("w", withhold=True)
curs.execute("select data from withhold order by data")
self.assertEqual(curs.fetchone(), (10,))
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_BEGIN)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_INTRANS)
self.conn.commit()
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
self.assertEqual(curs.fetchone(), (20,))
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
curs.close()
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
def test_withhold_autocommit(self):
self._create_withhold_table()
self.conn.commit()
self.conn.autocommit = True
curs = self.conn.cursor("w", withhold=True)
curs.execute("select data from withhold order by data")
self.assertEqual(curs.fetchone(), (10,))
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
self.conn.commit()
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
curs.close()
self.assertEqual(self.conn.status, psycopg2.extensions.STATUS_READY)
self.assertEqual(self.conn.get_transaction_status(),
psycopg2.extensions.TRANSACTION_STATUS_IDLE)
def test_scrollable(self):
self.assertRaises(psycopg2.ProgrammingError, self.conn.cursor,
scrollable=True)