Fix(parser): don't consume identifier in unnamed constraint parser (#…

…2377)
tobymao · Oct 5, 2023 · dd8334d · dd8334d
1 parent 2bcd3e7
commit dd8334d
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/sqlglot/parser.py b/sqlglot/parser.py
@@ -3892,7 +3892,9 @@ def _parse_constraint(self) -> t.Optional[exp.Expression]:
     def _parse_unnamed_constraint(
         self, constraints: t.Optional[t.Collection[str]] = None
     ) -> t.Optional[exp.Expression]:
-        if not self._match_texts(constraints or self.CONSTRAINT_PARSERS):
+        if self._match(TokenType.IDENTIFIER, advance=False) or not self._match_texts(
+            constraints or self.CONSTRAINT_PARSERS
+        ):
             return None
 
         constraint = self._prev.text.upper()

diff --git a/tests/dialects/test_mysql.py b/tests/dialects/test_mysql.py
@@ -29,6 +29,9 @@ def test_ddl(self):
         self.validate_identity("CREATE TABLE foo (a BIGINT, INDEX USING BTREE (b))")
         self.validate_identity("CREATE TABLE foo (a BIGINT, FULLTEXT INDEX (b))")
         self.validate_identity("CREATE TABLE foo (a BIGINT, SPATIAL INDEX (b))")
+        self.validate_identity(
+            "CREATE TABLE `oauth_consumer` (`key` VARCHAR(32) NOT NULL, UNIQUE `OAUTH_CONSUMER_KEY` (`key`))"
+        )
         self.validate_identity(
             "CREATE TABLE `x` (`username` VARCHAR(200), PRIMARY KEY (`username`(16)))"
         )