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from tests.dialects.test_dialect import Validator
class TestClickhouse(Validator):
dialect = "clickhouse"
def test_clickhouse(self):
self.validate_identity("SELECT INTERVAL t.days day")
self.validate_identity("SELECT match('abc', '([a-z]+)')")
self.validate_identity("dictGet(x, 'y')")
self.validate_identity("SELECT * FROM x FINAL")
self.validate_identity("SELECT * FROM x AS y FINAL")
self.validate_identity("'a' IN mapKeys(map('a', 1, 'b', 2))")
self.validate_identity("CAST((1, 2) AS Tuple(a Int8, b Int16))")
self.validate_identity("SELECT * FROM foo LEFT ANY JOIN bla")
self.validate_identity("SELECT * FROM foo LEFT ASOF JOIN bla")
self.validate_identity("SELECT * FROM foo ASOF JOIN bla")
self.validate_identity("SELECT * FROM foo ANY JOIN bla")
self.validate_identity("SELECT quantile(0.5)(a)")
self.validate_identity("SELECT quantiles(0.5)(a) AS x FROM t")
self.validate_identity("SELECT quantiles(0.1, 0.2, 0.3)(a)")
self.validate_identity("SELECT histogram(5)(a)")
self.validate_identity("SELECT groupUniqArray(2)(a)")
self.validate_identity("SELECT exponentialTimeDecayedAvg(60)(a, b)")
self.validate_identity("SELECT * FROM foo WHERE x GLOBAL IN (SELECT * FROM bar)")
self.validate_identity("position(haystack, needle)")
self.validate_identity("position(haystack, needle, position)")
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(Int64))",
},
)
self.validate_all(
"CAST(1 AS Nullable(DateTime64(6, 'UTC')))",
write={
"clickhouse": "CAST(1 AS Nullable(DateTime64(6, 'UTC')))",
},
)
self.validate_all(
"SELECT x #! comment",
write={"": "SELECT x /* comment */"},
)
self.validate_all(
"SELECT quantileIf(0.5)(a, true)",
write={
"clickhouse": "SELECT quantileIf(0.5)(a, TRUE)",
},
)
self.validate_all(
"SELECT position(needle IN haystack)",
write={"clickhouse": "SELECT position(haystack, needle)"},
)
def test_cte(self):
self.validate_identity("WITH 'x' AS foo SELECT foo")
self.validate_identity("WITH SUM(bytes) AS foo SELECT foo FROM system.parts")
self.validate_identity("WITH (SELECT foo) AS bar SELECT bar + 5")
self.validate_identity("WITH test1 AS (SELECT i + 1, j + 1 FROM test1) SELECT * FROM test1")
def test_signed_and_unsigned_types(self):
data_types = [
"UInt8",
"UInt16",
"UInt32",
"UInt64",
"UInt128",
"UInt256",
"Int8",
"Int16",
"Int32",
"Int64",
"Int128",
"Int256",
]
for data_type in data_types:
self.validate_all(
f"pow(2, 32)::{data_type}",
write={"clickhouse": f"CAST(POWER(2, 32) AS {data_type})"},
)
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