def delete_by_columns(class_, cursor, where_column_value_pairs,
limit=None):
sharding_key = cursor.routing.sharding_key
if sharding_key is None:
raise dbexceptions.ProgrammingError('sharding_key cannot be empty')
if not where_column_value_pairs:
raise dbexceptions.ProgrammingError(
'deleting the whole table is not allowed')
query, bind_vars = sql_builder.delete_by_columns_query(
class_.table_name,
where_column_value_pairs,
limit=limit)
cursor.execute(query, bind_vars)
if cursor.rowcount == 0:
raise dbexceptions.DatabaseError('DB Row not found')
rowcount = cursor.rowcount
# delete the lookup map.
lookup_cursor_method = functools.partial(
db_object.create_cursor_from_old_cursor, cursor)
class_.delete_sharding_key_entity_id_lookup(
lookup_cursor_method, sharding_key)
return rowcount
def delete_by_columns(class_,
cursor,
where_column_value_pairs,
limit=None):
sharding_key = cursor.routing.sharding_key
if sharding_key is None:
raise dbexceptions.ProgrammingError("sharding_key cannot be empty")
if not where_column_value_pairs:
raise dbexceptions.ProgrammingError(
"deleting the whole table is not allowed")
query, bind_vars = sql_builder.delete_by_columns_query(
class_.table_name, where_column_value_pairs, limit=limit)
cursor.execute(query, bind_vars)
if cursor.rowcount == 0:
raise dbexceptions.DatabaseError("DB Row not found")
rowcount = cursor.rowcount
#delete the lookup map.
lookup_cursor_method = functools.partial(
db_object.create_cursor_from_old_cursor, cursor)
class_.delete_sharding_key_entity_id_lookup(lookup_cursor_method,
sharding_key)
return rowcount
def test_simple(self):
sql, bind_vars = sql_builder.delete_by_columns_query(
table_name="my_table", where_column_value_pairs=[("col_a", 1), ("col_b", 2)], limit=5
)
self.assertEqual(
sql,
"DELETE FROM my_table " "WHERE col_a = %(col_a_1)s AND col_b = %(col_b_2)s " "LIMIT %(limit_row_count)s",
)
self.assertEqual(bind_vars, dict(col_a_1=1, col_b_2=2, limit_row_count=5))
def test_simple(self):
sql, bind_vars = sql_builder.delete_by_columns_query(
table_name='my_table',
where_column_value_pairs=[('col_a', 1), ('col_b', 2)],
limit=5)
self.assertEqual(
sql, 'DELETE FROM my_table '
'WHERE col_a = %(col_a_1)s AND col_b = %(col_b_2)s '
'LIMIT %(limit_row_count)s')
self.assertEqual(bind_vars,
dict(col_a_1=1, col_b_2=2, limit_row_count=5))
def test_simple(self):
sql, bind_vars = sql_builder.delete_by_columns_query(
table_name='my_table',
where_column_value_pairs=[('col_a', 1), ('col_b', 2)],
limit=5)
self.assertEqual(
sql,
'DELETE FROM my_table '
'WHERE col_a = %(col_a_1)s AND col_b = %(col_b_2)s '
'LIMIT %(limit_row_count)s')
self.assertEqual(
bind_vars,
dict(col_a_1=1, col_b_2=2, limit_row_count=5))
def delete_by_columns(class_, cursor, where_column_value_pairs, limit=None,
**columns):
if not where_column_value_pairs:
where_column_value_pairs = columns.items()
where_column_value_pairs.sort()
if not where_column_value_pairs:
raise dbexceptions.ProgrammingError("deleting the whole table is not allowed")
query, bind_variables = sql_builder.delete_by_columns_query(class_.table_name,
where_column_value_pairs,
limit=limit)
cursor.execute(query, bind_variables)
if cursor.rowcount == 0:
raise dbexceptions.DatabaseError("DB Row not found")
return cursor.rowcount
def delete_by_columns(class_, cursor, where_column_value_pairs, limit=None):
if not where_column_value_pairs:
raise dbexceptions.ProgrammingError(
'deleting the whole table is not allowed')
where_column_value_pairs = class_._add_keyspace_id(
unpack_keyspace_id(cursor.keyspace_ids[0]), where_column_value_pairs)
query, bind_vars = sql_builder.delete_by_columns_query(
class_.table_name, where_column_value_pairs, limit=limit)
cursor.execute(query, bind_vars)
if cursor.rowcount == 0:
raise dbexceptions.DatabaseError('DB Row not found')
return cursor.rowcount
def delete_by_columns(class_, cursor, where_column_value_pairs, limit=None):
if not where_column_value_pairs:
raise dbexceptions.ProgrammingError("deleting the whole table is not allowed")
where_column_value_pairs = class_._add_keyspace_id(
unpack_keyspace_id(cursor.keyspace_ids[0]), where_column_value_pairs)
query, bind_vars = sql_builder.delete_by_columns_query(class_.table_name,
where_column_value_pairs,
limit=limit)
cursor.execute(query, bind_vars)
if cursor.rowcount == 0:
raise dbexceptions.DatabaseError("DB Row not found")
return cursor.rowcount
def delete_by_columns(class_, cursor, where_column_value_pairs, limit=None,
**columns):
if not where_column_value_pairs:
where_column_value_pairs = columns.items()
where_column_value_pairs.sort()
if not where_column_value_pairs:
raise dbexceptions.ProgrammingError("deleting the whole table is not allowed")
query, bind_vars = sql_builder.delete_by_columns_query(class_.table_name,
where_column_value_pairs,
limit=limit)
cursor.execute(query, bind_vars)
if cursor.rowcount == 0:
raise dbexceptions.DatabaseError("DB Row not found")
return cursor.rowcount
def create_delete_query(class_, where_column_value_pairs, limit=None):
return sql_builder.delete_by_columns_query(class_.table_name,
where_column_value_pairs,
limit=limit)
def create_delete_query(class_, where_column_value_pairs, limit=None):
return sql_builder.delete_by_columns_query(class_.table_name,
where_column_value_pairs,
limit=limit)
