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gh-89121: Keep the number of pending SQLite statements to a minimum #30379

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Merged
merged 8 commits into from
Jun 23, 2022
Merged

gh-89121: Keep the number of pending SQLite statements to a minimum #30379

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de2299c
bpo-44958: Always reset SQLite statements when we're done with them
Sep 23, 2021
04c6739
Merge branch 'main' into sqlite-reset
Jan 22, 2022
1bbfff0
Merge branch 'main' into sqlite-reset
Feb 27, 2022
6d46307
Sync with main
erlend-aasland May 3, 2022
7d8cbe2
Merge branch 'main' into sqlite-reset
erlend-aasland Jun 20, 2022
317607b
Fix merge
erlend-aasland Jun 20, 2022
12bb96e
Reset in iternext on error path
erlend-aasland Jun 20, 2022
89727fe
Merge branch 'main' into sqlite-reset
erlend-aasland Jun 21, 2022
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Merge branch 'main' into sqlite-reset
  • Loading branch information
@erlend-aasland
erlend-aasland committed Jun 20, 2022
commit 7d8cbe289f5722b72ed5156e66f028a64608dcf3
31 changes: 15 additions & 16 deletions Modules/_sqlite/cursor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -830,13 +830,13 @@ _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* operation
}
}

/* reset description and rowcount */
/* reset description */
Py_INCREF(Py_None);
Py_SETREF(self->description, Py_None);

if (self->statement) {
// Reset pending statements on this cursor.
(void)pysqlite_statement_reset(self->statement);
(void)stmt_reset(self->statement);
}

PyObject *stmt = get_statement_from_cache(self, operation);
Expand Down Expand Up @@ -940,14 +940,11 @@ _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* operation
}
}

if (self->statement->is_dml) {
self->rowcount += (long)sqlite3_changes(self->connection->db);
} else {
self->rowcount= -1L;
}

if (rc == SQLITE_DONE) {
(void)pysqlite_statement_reset(self->statement);
if (self->statement->is_dml) {
self->rowcount += (long)sqlite3_changes(self->connection->db);
}
stmt_reset(self->statement);
}
Py_XDECREF(parameters);
}
Expand Down Expand Up @@ -1118,15 +1115,17 @@ pysqlite_cursor_iternext(pysqlite_Cursor *self)
}
int rc = stmt_step(stmt);
if (rc == SQLITE_DONE) {
if (self->statement->is_dml) {
self->rowcount = (long)sqlite3_changes(self->connection->db);
}
(void)pysqlite_statement_reset(self->statement);
Py_CLEAR(self->statement);

if (rc != SQLITE_DONE) {
(void)_pysqlite_seterror(self->connection->state,
self->connection->db);
Py_DECREF(row);
return NULL;
}
}
else if (rc != SQLITE_ROW) {
(void)_pysqlite_seterror(self->connection->state,
self->connection->db);
Py_DECREF(row);
return NULL;
}
if (!Py_IsNone(self->row_factory)) {
PyObject *factory = self->row_factory;
Expand Down
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