Fixed crash on keys with comma (#85)

Author: bakwc

mysql_ch_replicator/converter.py

@@ -672,7 +672,15 @@ def parse_mysql_table_structure(self, create_statement, required_table_name=None
         if structure.charset:
             structure.charset_python = CHARSET_MYSQL_TO_PYTHON[structure.charset]
 
+        prev_line = ''
         for line in inner_tokens:
+            line = prev_line + line
+            q_count = line.count('`')
+            if q_count % 2 == 1:
+                prev_line = line
+                continue
+            prev_line = ''
+
             if line.lower().startswith('unique key'):
                 continue
             if line.lower().startswith('key'):

test_mysql_ch_replicator.py

@@ -760,7 +760,8 @@ def test_different_types_1():
   `modified_date` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
   `entity` int NOT NULL DEFAULT '0',
   `sent_2_tac` char(1) CHARACTER SET utf8mb3 COLLATE utf8mb3_unicode_ci NOT NULL DEFAULT '0',
-    PRIMARY KEY (id)
+    PRIMARY KEY (id),
+    KEY `name, employee` (`name`,`employee`) USING BTREE
 ); 
     ''')