Fix: allow parsing 'if' as an identifier (#1517)

tobymao · May 2, 2023 · c3db2b8 · c3db2b8
1 parent 52ab03d
commit c3db2b8
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diff --git a/sqlglot/parser.py b/sqlglot/parser.py
@@ -3450,7 +3450,13 @@ def _parse_if(self) -> t.Optional[exp.Expression]:
             self.validate_expression(this, args)
             self._match_r_paren()
         else:
+            index = self._index - 1
             condition = self._parse_conjunction()
+
+            if not condition:
+                self._retreat(index)
+                return None
+
             self._match(TokenType.THEN)
             true = self._parse_conjunction()
             false = self._parse_conjunction() if self._match(TokenType.ELSE) else None

diff --git a/tests/fixtures/identity.sql b/tests/fixtures/identity.sql
@@ -817,3 +817,4 @@ JSON_OBJECT('x': NULL, 'y': 1 WITH UNIQUE KEYS)
 JSON_OBJECT('x': NULL, 'y': 1 ABSENT ON NULL WITH UNIQUE KEYS)
 JSON_OBJECT('x': 1 RETURNING VARCHAR(100))
 JSON_OBJECT('x': 1 RETURNING VARBINARY FORMAT JSON ENCODING UTF8)
+SELECT if.x