fix(exasol): enable minus (#7521)

Author: Hfuegl

sqlglot/dialects/exasol.py

@@ -61,6 +61,7 @@ class Tokenizer(tokens.Tokenizer):
             "REGEXP_LIKE": TokenType.RLIKE,
             "SEPARATOR": TokenType.SEPARATOR,
             "SYSTIMESTAMP": TokenType.SYSTIMESTAMP,
+            "MINUS": TokenType.EXCEPT,
         }
         KEYWORDS.pop("DIV")
 

tests/dialects/test_exasol.py

@@ -31,6 +31,10 @@ def test_exasol(self):
                 "mysql": "SELECT FROM_UNIXTIME(col)",
             },
         )
+        self.validate_identity(
+            "select foo, bar from table_1 minus select foo, bar from table_2",
+            "SELECT foo, bar FROM table_1 EXCEPT SELECT foo, bar FROM table_2",
+        )
 
     def test_exasol_keywords(self):
         keywords = ["CS", "ADD", "BOOLEAN", "CALL", "CONTROL"]