fix: Use singlestoredb dialect for sqlglot (apache#36096)

Author: Vitor-Avila

superset/sql/parse.py

@@ -33,6 +33,7 @@
     Dialect,
     Dialects,
 )
+from sqlglot.dialects.singlestore import SingleStore
 from sqlglot.errors import ParseError
 from sqlglot.optimizer.pushdown_predicates import (
     pushdown_predicates,
@@ -101,7 +102,7 @@
     "redshift": Dialects.REDSHIFT,
     "risingwave": Dialects.RISINGWAVE,
     "shillelagh": Dialects.SQLITE,
-    "singlestore": Dialects.MYSQL,
+    "singlestoredb": SingleStore,
     "snowflake": Dialects.SNOWFLAKE,
     # "solr": ???
     "spark": Dialects.SPARK,

tests/unit_tests/sql/parse_tests.py

@@ -2803,6 +2803,19 @@ def test_kqlstatement_is_select(kql: str, expected: bool) -> None:
     assert KustoKQLStatement(kql, "kustokql").is_select() == expected
 
 
+def test_singlestore_engine_mapping():
+    """
+    Test the `singlestoredb` dialect is properly used.
+    """
+    sql = "SELECT COUNT(*) AS `COUNT(*)`"
+    statement = SQLStatement(sql, engine="singlestoredb")
+    assert statement.is_select()
+
+    # Should parse without errors
+    formatted = statement.format()
+    assert "COUNT(*)" in formatted
+
+
 def test_remove_quotes() -> None:
     """
     Test the `remove_quotes` helper function.