fix(mysql): transpile MONTHNAME (#2222)

tobymao · Sep 14, 2023 · 2fa4043 · 2fa4043
1 parent 6bc8e13
commit 2fa4043
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/sqlglot/dialects/mysql.py b/sqlglot/dialects/mysql.py
@@ -236,9 +236,13 @@ class Parser(parser.Parser):
             "DATE_FORMAT": format_time_lambda(exp.TimeToStr, "mysql"),
             "DATE_SUB": parse_date_delta_with_interval(exp.DateSub),
             "INSTR": lambda args: exp.StrPosition(substr=seq_get(args, 1), this=seq_get(args, 0)),
+            "ISNULL": isnull_to_is_null,
             "LOCATE": locate_to_strposition,
+            "MONTHNAME": lambda args: exp.TimeToStr(
+                this=seq_get(args, 0),
+                format=exp.Literal.string("%B"),
+            ),
             "STR_TO_DATE": _str_to_date,
-            "ISNULL": isnull_to_is_null,
         }
 
         FUNCTION_PARSERS = {

diff --git a/tests/dialects/test_mysql.py b/tests/dialects/test_mysql.py
@@ -876,3 +876,12 @@ def test_is_null(self):
         self.validate_all(
             "SELECT ISNULL(x)", write={"": "SELECT (x IS NULL)", "mysql": "SELECT (x IS NULL)"}
         )
+
+    def test_monthname(self):
+        self.validate_all(
+            "MONTHNAME(x)",
+            write={
+                "": "TIME_TO_STR(x, '%B')",
+                "mysql": "DATE_FORMAT(x, '%M')",
+            },
+        )