path: root/tests/dialects/test_clickhouse.py

from sqlglot import exp, parse_one
from tests.dialects.test_dialect import Validator


class TestClickhouse(Validator):
    dialect = "clickhouse"

    def test_clickhouse(self):
        self.validate_identity("ATTACH DATABASE DEFAULT ENGINE = ORDINARY")
        self.validate_identity("CAST(['hello'], 'Array(Enum8(''hello'' = 1))')")
        self.validate_identity("SELECT x, COUNT() FROM y GROUP BY x WITH TOTALS")
        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 * FROM foo GLOBAL ANY JOIN bla")
        self.validate_identity("SELECT * FROM foo GLOBAL LEFT 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 quantileTiming(0.5)(RANGE(100))")
        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_identity("CAST(x AS DATETIME)")
        self.validate_identity(
            'SELECT CAST(tuple(1 AS "a", 2 AS "b", 3.0 AS "c").2 AS Nullable(TEXT))'
        )
        self.validate_identity(
            "CREATE TABLE test (id UInt8) ENGINE=AggregatingMergeTree() ORDER BY tuple()"
        )
        self.validate_identity(
            "CREATE TABLE test ON CLUSTER default (id UInt8) ENGINE=AggregatingMergeTree() ORDER BY tuple()"
        )
        self.validate_identity(
            "CREATE MATERIALIZED VIEW test_view ON CLUSTER cl1 (id UInt8) ENGINE=AggregatingMergeTree() ORDER BY tuple() AS SELECT * FROM test_data"
        )
        self.validate_identity(
            "CREATE MATERIALIZED VIEW test_view ON CLUSTER cl1 (id UInt8) TO table1 AS SELECT * FROM test_data"
        )
        self.validate_identity(
            "CREATE MATERIALIZED VIEW test_view (id UInt8) TO db.table1 AS SELECT * FROM test_data"
        )

        self.validate_all(
            "CONCAT(CASE WHEN COALESCE(CAST(a AS TEXT), '') IS NULL THEN COALESCE(CAST(a AS TEXT), '') ELSE CAST(COALESCE(CAST(a AS TEXT), '') AS TEXT) END, CASE WHEN COALESCE(CAST(b AS TEXT), '') IS NULL THEN COALESCE(CAST(b AS TEXT), '') ELSE CAST(COALESCE(CAST(b AS TEXT), '') AS TEXT) END)",
            read={"postgres": "CONCAT(a, b)"},
        )
        self.validate_all(
            "CONCAT(CASE WHEN a IS NULL THEN a ELSE CAST(a AS TEXT) END, CASE WHEN b IS NULL THEN b ELSE CAST(b AS TEXT) END)",
            read={"mysql": "CONCAT(a, b)"},
        )
        self.validate_all(
            r"'Enum8(\'Sunday\' = 0)'", write={"clickhouse": "'Enum8(''Sunday'' = 0)'"}
        )
        self.validate_all(
            "SELECT uniq(x) FROM (SELECT any(y) AS x FROM (SELECT 1 AS y))",
            read={
                "bigquery": "SELECT APPROX_COUNT_DISTINCT(x) FROM (SELECT ANY_VALUE(y) x FROM (SELECT 1 y))",
            },
            write={
                "bigquery": "SELECT APPROX_COUNT_DISTINCT(x) FROM (SELECT ANY_VALUE(y) AS x FROM (SELECT 1 AS y))",
            },
        )
        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)"},
        )
        self.validate_identity(
            "SELECT * FROM x LIMIT 10 SETTINGS max_results = 100, result = 'break'"
        )
        self.validate_identity("SELECT * FROM x LIMIT 10 SETTINGS max_results = 100, result_")
        self.validate_identity("SELECT * FROM x FORMAT PrettyCompact")
        self.validate_identity(
            "SELECT * FROM x LIMIT 10 SETTINGS max_results = 100, result_ FORMAT PrettyCompact"
        )
        self.validate_all(
            "SELECT * FROM foo JOIN bar USING id, name",
            write={"clickhouse": "SELECT * FROM foo JOIN bar USING (id, name)"},
        )
        self.validate_all(
            "SELECT * FROM foo ANY LEFT JOIN bla ON foo.c1 = bla.c2",
            write={"clickhouse": "SELECT * FROM foo LEFT ANY JOIN bla ON foo.c1 = bla.c2"},
        )
        self.validate_all(
            "SELECT * FROM foo GLOBAL ANY LEFT JOIN bla ON foo.c1 = bla.c2",
            write={"clickhouse": "SELECT * FROM foo GLOBAL LEFT ANY JOIN bla ON foo.c1 = bla.c2"},
        )
        self.validate_all(
            """
            SELECT
                loyalty,
                count()
            FROM hits SEMI LEFT JOIN users USING (UserID)
            GROUP BY loyalty
            ORDER BY loyalty ASC
            """,
            write={
                "clickhouse": "SELECT loyalty, COUNT() FROM hits LEFT SEMI JOIN users USING (UserID)"
                + " GROUP BY loyalty ORDER BY loyalty"
            },
        )

    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_ternary(self):
        self.validate_all("x ? 1 : 2", write={"clickhouse": "CASE WHEN x THEN 1 ELSE 2 END"})
        self.validate_all(
            "IF(BAR(col), sign > 0 ? FOO() : 0, 1)",
            write={
                "clickhouse": "CASE WHEN BAR(col) THEN CASE WHEN sign > 0 THEN FOO() ELSE 0 END ELSE 1 END"
            },
        )
        self.validate_all(
            "x AND FOO() > 3 + 2 ? 1 : 2",
            write={"clickhouse": "CASE WHEN x AND FOO() > 3 + 2 THEN 1 ELSE 2 END"},
        )
        self.validate_all(
            "x ? (y ? 1 : 2) : 3",
            write={"clickhouse": "CASE WHEN x THEN (CASE WHEN y THEN 1 ELSE 2 END) ELSE 3 END"},
        )
        self.validate_all(
            "x AND (foo() ? FALSE : TRUE) ? (y ? 1 : 2) : 3",
            write={
                "clickhouse": "CASE WHEN x AND (CASE WHEN foo() THEN FALSE ELSE TRUE END) THEN (CASE WHEN y THEN 1 ELSE 2 END) ELSE 3 END"
            },
        )

        ternary = parse_one("x ? (y ? 1 : 2) : 3", read="clickhouse")

        self.assertIsInstance(ternary, exp.If)
        self.assertIsInstance(ternary.this, exp.Column)
        self.assertIsInstance(ternary.args["true"], exp.Paren)
        self.assertIsInstance(ternary.args["false"], exp.Literal)

        nested_ternary = ternary.args["true"].this

        self.assertIsInstance(nested_ternary.this, exp.Column)
        self.assertIsInstance(nested_ternary.args["true"], exp.Literal)
        self.assertIsInstance(nested_ternary.args["false"], exp.Literal)

        parse_one("a and b ? 1 : 2", read="clickhouse").assert_is(exp.If).this.assert_is(exp.And)

    def test_parameterization(self):
        self.validate_all(
            "SELECT {abc: UInt32}, {b: String}, {c: DateTime},{d: Map(String, Array(UInt8))}, {e: Tuple(UInt8, String)}",
            write={
                "clickhouse": "SELECT {abc: UInt32}, {b: TEXT}, {c: DATETIME}, {d: Map(TEXT, Array(UInt8))}, {e: Tuple(UInt8, String)}",
                "": "SELECT :abc, :b, :c, :d, :e",
            },
        )
        self.validate_all(
            "SELECT * FROM {table: Identifier}",
            write={"clickhouse": "SELECT * FROM {table: Identifier}"},
        )

    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})"},
            )

    def test_ddl(self):
        self.validate_identity(
            "CREATE TABLE foo (x UInt32) TTL time_column + INTERVAL '1' MONTH DELETE WHERE column = 'value'"
        )

        self.validate_all(
            """
            CREATE TABLE example1 (
               timestamp DateTime,
               x UInt32 TTL now() + INTERVAL 1 MONTH,
               y String TTL timestamp + INTERVAL 1 DAY,
               z String
            )
            ENGINE = MergeTree
            ORDER BY tuple()
            """,
            write={
                "clickhouse": """CREATE TABLE example1 (
  timestamp DATETIME,
  x UInt32 TTL now() + INTERVAL '1' MONTH,
  y TEXT TTL timestamp + INTERVAL '1' DAY,
  z TEXT
)
ENGINE=MergeTree
ORDER BY tuple()""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE TABLE test (id UInt64, timestamp DateTime64, data String, max_hits UInt64, sum_hits UInt64) ENGINE = MergeTree
            PRIMARY KEY (id, toStartOfDay(timestamp), timestamp)
            TTL timestamp + INTERVAL 1 DAY
            GROUP BY id, toStartOfDay(timestamp)
            SET
               max_hits = max(max_hits),
               sum_hits = sum(sum_hits)
            """,
            write={
                "clickhouse": """CREATE TABLE test (
  id UInt64,
  timestamp DateTime64,
  data TEXT,
  max_hits UInt64,
  sum_hits UInt64
)
ENGINE=MergeTree
PRIMARY KEY (id, toStartOfDay(timestamp), timestamp)
TTL
  timestamp + INTERVAL '1' DAY
GROUP BY
  id,
  toStartOfDay(timestamp)
SET
  max_hits = MAX(max_hits),
  sum_hits = SUM(sum_hits)""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE TABLE test (id String, data String) ENGINE = AggregatingMergeTree()
                ORDER BY tuple()
            SETTINGS
                max_suspicious_broken_parts=500,
                parts_to_throw_insert=100
            """,
            write={
                "clickhouse": """CREATE TABLE test (
  id TEXT,
  data TEXT
)
ENGINE=AggregatingMergeTree()
ORDER BY tuple()
SETTINGS
  max_suspicious_broken_parts = 500,
  parts_to_throw_insert = 100""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE TABLE example_table
            (
                d DateTime,
                a Int
            )
            ENGINE = MergeTree
            PARTITION BY toYYYYMM(d)
            ORDER BY d
            TTL d + INTERVAL 1 MONTH DELETE,
                d + INTERVAL 1 WEEK TO VOLUME 'aaa',
                d + INTERVAL 2 WEEK TO DISK 'bbb';
            """,
            write={
                "clickhouse": """CREATE TABLE example_table (
  d DATETIME,
  a Int32
)
ENGINE=MergeTree
PARTITION BY toYYYYMM(d)
ORDER BY d
TTL
  d + INTERVAL '1' MONTH DELETE,
  d + INTERVAL '1' WEEK TO VOLUME 'aaa',
  d + INTERVAL '2' WEEK TO DISK 'bbb'""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE TABLE table_with_where
            (
                d DateTime,
                a Int
            )
            ENGINE = MergeTree
            PARTITION BY toYYYYMM(d)
            ORDER BY d
            TTL d + INTERVAL 1 MONTH DELETE WHERE toDayOfWeek(d) = 1;
            """,
            write={
                "clickhouse": """CREATE TABLE table_with_where (
  d DATETIME,
  a Int32
)
ENGINE=MergeTree
PARTITION BY toYYYYMM(d)
ORDER BY d
TTL
  d + INTERVAL '1' MONTH DELETE
WHERE
  toDayOfWeek(d) = 1""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE TABLE table_for_recompression
            (
                d DateTime,
                key UInt64,
                value String
            ) ENGINE MergeTree()
            ORDER BY tuple()
            PARTITION BY key
            TTL d + INTERVAL 1 MONTH RECOMPRESS CODEC(ZSTD(17)), d + INTERVAL 1 YEAR RECOMPRESS CODEC(LZ4HC(10))
            SETTINGS min_rows_for_wide_part = 0, min_bytes_for_wide_part = 0;
            """,
            write={
                "clickhouse": """CREATE TABLE table_for_recompression (
  d DATETIME,
  key UInt64,
  value TEXT
)
ENGINE=MergeTree()
ORDER BY tuple()
PARTITION BY key
TTL
  d + INTERVAL '1' MONTH RECOMPRESS CODEC(ZSTD(17)),
  d + INTERVAL '1' YEAR RECOMPRESS CODEC(LZ4HC(10))
SETTINGS
  min_rows_for_wide_part = 0,
  min_bytes_for_wide_part = 0""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE TABLE table_for_aggregation
            (
                d DateTime,
                k1 Int,
                k2 Int,
                x Int,
                y Int
            )
            ENGINE = MergeTree
            ORDER BY (k1, k2)
            TTL d + INTERVAL 1 MONTH GROUP BY k1, k2 SET x = max(x), y = min(y);
            """,
            write={
                "clickhouse": """CREATE TABLE table_for_aggregation (
  d DATETIME,
  k1 Int32,
  k2 Int32,
  x Int32,
  y Int32
)
ENGINE=MergeTree
ORDER BY (k1, k2)
TTL
  d + INTERVAL '1' MONTH
GROUP BY
  k1,
  k2
SET
  x = MAX(x),
  y = MIN(y)""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE DICTIONARY discounts_dict (
                advertiser_id UInt64,
                discount_start_date Date,
                discount_end_date Date,
                amount Float64
            )
            PRIMARY KEY id
            SOURCE(CLICKHOUSE(TABLE 'discounts'))
            LIFETIME(MIN 1 MAX 1000)
            LAYOUT(RANGE_HASHED(range_lookup_strategy 'max'))
            RANGE(MIN discount_start_date MAX discount_end_date)
            """,
            write={
                "clickhouse": """CREATE DICTIONARY discounts_dict (
  advertiser_id UInt64,
  discount_start_date DATE,
  discount_end_date DATE,
  amount Float64
)
PRIMARY KEY (id)
SOURCE(CLICKHOUSE(
  TABLE 'discounts'
))
LIFETIME(MIN 1 MAX 1000)
LAYOUT(RANGE_HASHED(
  range_lookup_strategy 'max'
))
RANGE(MIN discount_start_date MAX discount_end_date)""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE DICTIONARY my_ip_trie_dictionary (
                prefix String,
                asn UInt32,
                cca2 String DEFAULT '??'
            )
            PRIMARY KEY prefix
            SOURCE(CLICKHOUSE(TABLE 'my_ip_addresses'))
            LAYOUT(IP_TRIE)
            LIFETIME(3600);
            """,
            write={
                "clickhouse": """CREATE DICTIONARY my_ip_trie_dictionary (
  prefix TEXT,
  asn UInt32,
  cca2 TEXT DEFAULT '??'
)
PRIMARY KEY (prefix)
SOURCE(CLICKHOUSE(
  TABLE 'my_ip_addresses'
))
LAYOUT(IP_TRIE())
LIFETIME(MIN 0 MAX 3600)""",
            },
            pretty=True,
        )
        self.validate_all(
            """
            CREATE DICTIONARY polygons_test_dictionary
            (
                key Array(Array(Array(Tuple(Float64, Float64)))),
                name String
            )
            PRIMARY KEY key
            SOURCE(CLICKHOUSE(TABLE 'polygons_test_table'))
            LAYOUT(POLYGON(STORE_POLYGON_KEY_COLUMN 1))
            LIFETIME(0);
            """,
            write={
                "clickhouse": """CREATE DICTIONARY polygons_test_dictionary (
  key Array(Array(Array(Tuple(Float64, Float64)))),
  name TEXT
)
PRIMARY KEY (key)
SOURCE(CLICKHOUSE(
  TABLE 'polygons_test_table'
))
LAYOUT(POLYGON(
  STORE_POLYGON_KEY_COLUMN 1
))
LIFETIME(MIN 0 MAX 0)""",
            },
            pretty=True,
        )