updated the parser to support ALTER VIEW

Author: MinuraPunchihewa

mindsdb_sql_parser/parser.py

@@ -10,6 +10,7 @@
 from mindsdb_sql_parser.ast.mindsdb.create_database import CreateDatabase
 from mindsdb_sql_parser.ast.mindsdb.create_ml_engine import CreateMLEngine
 from mindsdb_sql_parser.ast.mindsdb.create_view import CreateView
+from mindsdb_sql_parser.ast.mindsdb.alter_view import AlterView
 from mindsdb_sql_parser.ast.mindsdb.create_job import CreateJob
 from mindsdb_sql_parser.ast.mindsdb.chatbot import CreateChatBot, UpdateChatBot, DropChatBot
 from mindsdb_sql_parser.ast.mindsdb.drop_job import DropJob
@@ -80,6 +81,7 @@ class MindsDBParser(Parser):
        'drop_database',
        'update_database',
        'drop_view',
+       'alter_view',
        'drop_table',
        'create_table',
        'create_job',
@@ -697,6 +699,18 @@ def create_view(self, p):
                           query_str=query_str,
                           if_not_exists=p.if_not_exists_or_empty)
 
+    # ALTER VIEW
+    @_('ALTER VIEW identifier AS LPAREN raw_query RPAREN create_view_from_table_or_nothing',
+       'ALTER VIEW identifier LPAREN raw_query RPAREN create_view_from_table_or_nothing')
+    def alter_view(self, p):
+        query_str = tokens_to_string(p.raw_query)
+
+        return AlterView(
+            name=p.identifier,
+            from_table=p.create_view_from_table_or_nothing,
+            query_str=query_str
+        )
+
     @_('FROM identifier')
     def create_view_from_table_or_nothing(self, p):
         return p.identifier