Add sql execute to connection

Author: artembo

Diff for: tarantool/connection.py

@@ -34,7 +34,8 @@
     RequestSubscribe,
     RequestUpdate,
     RequestUpsert,
-    RequestAuthenticate
+    RequestAuthenticate,
+    RequestExecute
 )
 from tarantool.space import Space
 from tarantool.const import (
@@ -785,3 +786,23 @@ def generate_sync(self):
         Need override for async io connection
         '''
         return 0
+
+    def execute(self, query, params=None):
+        '''
+        Execute SQL request.
+        Execute SQL query in database. 
+        
+        :param query: SQL syntax query 
+        :type query: str
+        
+        :param params: Bind values to use in query
+        :type params: list, dict
+
+        :return: query result data 
+        :rtype: list
+        '''
+        if not params:
+            params = []
+        request = RequestExecute(self, query, params)
+        response = self._send_request(request)
+        return response

Diff for: tarantool/const.py

@@ -29,6 +29,11 @@
 #
 IPROTO_DATA = 0x30
 IPROTO_ERROR = 0x31
+#
+IPROTO_METADATA = 0x32
+IPROTO_SQL_TEXT = 0x40
+IPROTO_SQL_BIND = 0x41
+IPROTO_SQL_INFO = 0x42
 
 IPROTO_GREETING_SIZE = 128
 IPROTO_BODY_MAX_LEN = 2147483648
@@ -44,6 +49,7 @@
 REQUEST_TYPE_EVAL = 8
 REQUEST_TYPE_UPSERT = 9
 REQUEST_TYPE_CALL = 10
+REQUEST_TYPE_EXECUTE = 11
 REQUEST_TYPE_PING = 64
 REQUEST_TYPE_JOIN = 65
 REQUEST_TYPE_SUBSCRIBE = 66

Diff for: tarantool/request.py

@@ -27,6 +27,8 @@
     IPROTO_OPS,
     # IPROTO_INDEX_BASE,
     IPROTO_SCHEMA_ID,
+    IPROTO_SQL_TEXT,
+    IPROTO_SQL_BIND,
     REQUEST_TYPE_OK,
     REQUEST_TYPE_PING,
     REQUEST_TYPE_SELECT,
@@ -37,6 +39,7 @@
     REQUEST_TYPE_UPSERT,
     REQUEST_TYPE_CALL16,
     REQUEST_TYPE_CALL,
+    REQUEST_TYPE_EXECUTE,
     REQUEST_TYPE_EVAL,
     REQUEST_TYPE_AUTHENTICATE,
     REQUEST_TYPE_JOIN,
@@ -342,3 +345,19 @@ def __init__(self, conn, sync):
         request_body = msgpack.dumps({IPROTO_CODE: self.request_type,
                                       IPROTO_SYNC: sync})
         self._body = request_body
+
+
+class RequestExecute(Request):
+    '''
+    Represents EXECUTE request
+    '''
+    request_type = REQUEST_TYPE_EXECUTE
+
+    # pylint: disable=W0231
+    def __init__(self, conn, sql, args):
+        super(RequestExecute, self).__init__(conn)
+
+        request_body = msgpack.dumps({IPROTO_SQL_TEXT: sql,
+                                      IPROTO_SQL_BIND: args})
+
+        self._body = request_body