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from tests.dialects.test_dialect import Validator
class TestClickhouse(Validator):
dialect = "clickhouse"
def test_clickhouse(self):
self.validate_identity("dictGet(x, 'y')")
self.validate_identity("SELECT * FROM x FINAL")
self.validate_identity("SELECT * FROM x AS y FINAL")
self.validate_all(
"SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname ASC NULLS LAST, lname",
write={
"clickhouse": "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname, lname",
"spark": "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname NULLS LAST, lname NULLS LAST",
},
)
self.validate_all(
"CAST(1 AS NULLABLE(Int64))",
write={
"clickhouse": "CAST(1 AS Nullable(BIGINT))",
},
)
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