sqlglot/tests/dialects/test_redshift.py

from sqlglot import transpile
from tests.dialects.test_dialect import Validator


class TestRedshift(Validator):
    dialect = "redshift"

    def test_redshift(self):
        self.validate_all(
            "x ~* 'pat'",
            write={
                "redshift": "x ~* 'pat'",
                "snowflake": "REGEXP_LIKE(x, 'pat', 'i')",
            },
        )

        self.validate_all(
            "SELECT CAST('01:03:05.124' AS TIME(2) WITH TIME ZONE)",
            read={
                "postgres": "SELECT CAST('01:03:05.124' AS TIMETZ(2))",
            },
            write={
                "postgres": "SELECT CAST('01:03:05.124' AS TIMETZ(2))",
                "redshift": "SELECT CAST('01:03:05.124' AS TIME(2) WITH TIME ZONE)",
            },
        )
        self.validate_all(
            "SELECT CAST('2020-02-02 01:03:05.124' AS TIMESTAMP(2) WITH TIME ZONE)",
            read={
                "postgres": "SELECT CAST('2020-02-02 01:03:05.124' AS TIMESTAMPTZ(2))",
            },
            write={
                "postgres": "SELECT CAST('2020-02-02 01:03:05.124' AS TIMESTAMPTZ(2))",
                "redshift": "SELECT CAST('2020-02-02 01:03:05.124' AS TIMESTAMP(2) WITH TIME ZONE)",
            },
        )
        self.validate_all(
            "SELECT INTERVAL '5 days'",
            read={
                "": "SELECT INTERVAL '5' days",
            },
        )
        self.validate_all(
            "SELECT ADD_MONTHS('2008-03-31', 1)",
            write={
                "redshift": "SELECT DATEADD(month, 1, CAST('2008-03-31' AS DATE))",
                "trino": "SELECT DATE_ADD('month', 1, CAST(CAST('2008-03-31' AS TIMESTAMP) AS DATE))",
            },
        )
        self.validate_all(
            "SELECT STRTOL('abc', 16)",
            read={
                "trino": "SELECT FROM_BASE('abc', 16)",
            },
            write={
                "redshift": "SELECT STRTOL('abc', 16)",
                "trino": "SELECT FROM_BASE('abc', 16)",
            },
        )
        self.validate_all(
            "SELECT SNAPSHOT, type",
            write={
                "": "SELECT SNAPSHOT, type",
                "redshift": 'SELECT "SNAPSHOT", "type"',
            },
        )

        self.validate_all(
            "x is true",
            write={
                "redshift": "x IS TRUE",
                "presto": "x",
            },
        )
        self.validate_all(
            "x is false",
            write={
                "redshift": "x IS FALSE",
                "presto": "NOT x",
            },
        )
        self.validate_all(
            "x is not false",
            write={
                "redshift": "NOT x IS FALSE",
                "presto": "NOT NOT x",
            },
        )
        self.validate_all(
            "LEN(x)",
            write={
                "redshift": "LENGTH(x)",
                "presto": "LENGTH(x)",
            },
        )

        self.validate_all(
            "SELECT SYSDATE",
            write={
                "": "SELECT CURRENT_TIMESTAMP()",
                "postgres": "SELECT CURRENT_TIMESTAMP",
                "redshift": "SELECT SYSDATE",
            },
        )
        self.validate_all(
            "SELECT DATE_PART(minute, timestamp '2023-01-04 04:05:06.789')",
            write={
                "postgres": "SELECT EXTRACT(minute FROM CAST('2023-01-04 04:05:06.789' AS TIMESTAMP))",
                "redshift": "SELECT EXTRACT(minute FROM CAST('2023-01-04 04:05:06.789' AS TIMESTAMP))",
                "snowflake": "SELECT DATE_PART(minute, CAST('2023-01-04 04:05:06.789' AS TIMESTAMPNTZ))",
            },
        )
        self.validate_all(
            "SELECT DATE_PART(month, date '20220502')",
            write={
                "postgres": "SELECT EXTRACT(month FROM CAST('20220502' AS DATE))",
                "redshift": "SELECT EXTRACT(month FROM CAST('20220502' AS DATE))",
                "snowflake": "SELECT DATE_PART(month, CAST('20220502' AS DATE))",
            },
        )
        self.validate_all(
            'create table "group" ("col" char(10))',
            write={
                "redshift": 'CREATE TABLE "group" ("col" CHAR(10))',
                "mysql": "CREATE TABLE `group` (`col` CHAR(10))",
            },
        )
        self.validate_all(
            'create table if not exists city_slash_id("city/id" integer not null, state char(2) not null)',
            write={
                "redshift": 'CREATE TABLE IF NOT EXISTS city_slash_id ("city/id" INTEGER NOT NULL, state CHAR(2) NOT NULL)',
                "presto": 'CREATE TABLE IF NOT EXISTS city_slash_id ("city/id" INTEGER NOT NULL, state CHAR(2) NOT NULL)',
            },
        )
        self.validate_all(
            "SELECT ST_AsEWKT(ST_GeomFromEWKT('SRID=4326;POINT(10 20)')::geography)",
            write={
                "redshift": "SELECT ST_ASEWKT(CAST(ST_GEOMFROMEWKT('SRID=4326;POINT(10 20)') AS GEOGRAPHY))",
                "bigquery": "SELECT ST_AsEWKT(CAST(ST_GeomFromEWKT('SRID=4326;POINT(10 20)') AS GEOGRAPHY))",
            },
        )
        self.validate_all(
            "SELECT ST_AsEWKT(ST_GeogFromText('LINESTRING(110 40, 2 3, -10 80, -7 9)')::geometry)",
            write={
                "redshift": "SELECT ST_ASEWKT(CAST(ST_GEOGFROMTEXT('LINESTRING(110 40, 2 3, -10 80, -7 9)') AS GEOMETRY))",
            },
        )
        self.validate_all(
            "SELECT 'abc'::BINARY",
            write={
                "redshift": "SELECT CAST('abc' AS VARBYTE)",
            },
        )
        self.validate_all(
            "SELECT 'abc'::CHARACTER",
            write={
                "redshift": "SELECT CAST('abc' AS CHAR)",
            },
        )
        self.validate_all(
            "SELECT * FROM venue WHERE (venuecity, venuestate) IN (('Miami', 'FL'), ('Tampa', 'FL')) ORDER BY venueid",
            write={
                "redshift": "SELECT * FROM venue WHERE (venuecity, venuestate) IN (('Miami', 'FL'), ('Tampa', 'FL')) ORDER BY venueid",
            },
        )
        self.validate_all(
            'SELECT tablename, "column" FROM pg_table_def WHERE "column" LIKE \'%start\\_%\' LIMIT 5',
            write={
                "redshift": 'SELECT tablename, "column" FROM pg_table_def WHERE "column" LIKE \'%start\\_%\' LIMIT 5'
            },
        )
        self.validate_all(
            "SELECT DISTINCT ON (a) a, b FROM x ORDER BY c DESC",
            write={
                "bigquery": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "databricks": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "drill": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "hive": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "mysql": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "oracle": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) _t WHERE _row_number = 1",
                "presto": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "redshift": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "snowflake": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "spark": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "sqlite": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "starrocks": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "tableau": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "teradata": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "trino": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
                "tsql": "SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC NULLS FIRST) AS _row_number FROM x) AS _t WHERE _row_number = 1",
            },
        )
        self.validate_all(
            "DECODE(x, a, b, c, d)",
            write={
                "": "CASE WHEN x = a OR (x IS NULL AND a IS NULL) THEN b WHEN x = c OR (x IS NULL AND c IS NULL) THEN d END",
                "oracle": "CASE WHEN x = a OR (x IS NULL AND a IS NULL) THEN b WHEN x = c OR (x IS NULL AND c IS NULL) THEN d END",
                "redshift": "CASE WHEN x = a OR (x IS NULL AND a IS NULL) THEN b WHEN x = c OR (x IS NULL AND c IS NULL) THEN d END",
                "snowflake": "CASE WHEN x = a OR (x IS NULL AND a IS NULL) THEN b WHEN x = c OR (x IS NULL AND c IS NULL) THEN d END",
                "spark": "CASE WHEN x = a OR (x IS NULL AND a IS NULL) THEN b WHEN x = c OR (x IS NULL AND c IS NULL) THEN d END",
            },
        )
        self.validate_all(
            "NVL(a, b, c, d)",
            write={
                "redshift": "COALESCE(a, b, c, d)",
                "mysql": "COALESCE(a, b, c, d)",
                "postgres": "COALESCE(a, b, c, d)",
            },
        )
        self.validate_all(
            "DATEDIFF('day', a, b)",
            write={
                "redshift": "DATEDIFF(day, CAST(a AS DATE), CAST(b AS DATE))",
                "presto": "DATE_DIFF('day', CAST(CAST(a AS TIMESTAMP) AS DATE), CAST(CAST(b AS TIMESTAMP) AS DATE))",
            },
        )
        self.validate_all(
            "SELECT TOP 1 x FROM y",
            write={
                "redshift": "SELECT x FROM y LIMIT 1",
            },
        )

    def test_identity(self):
        self.validate_identity("SELECT * FROM #x")
        self.validate_identity("SELECT INTERVAL '5 day'")
        self.validate_identity("foo$")
        self.validate_identity("$foo")
        self.validate_identity("CAST('bla' AS SUPER)")
        self.validate_identity("CREATE TABLE real1 (realcol REAL)")
        self.validate_identity("CAST('foo' AS HLLSKETCH)")
        self.validate_identity("'abc' SIMILAR TO '(b|c)%'")
        self.validate_identity("CREATE TABLE datetable (start_date DATE, end_date DATE)")
        self.validate_identity(
            "SELECT caldate + INTERVAL '1 second' AS dateplus FROM date WHERE caldate = '12-31-2008'"
        )
        self.validate_identity(
            "SELECT COUNT(*) FROM event WHERE eventname LIKE '%Ring%' OR eventname LIKE '%Die%'"
        )
        self.validate_identity(
            "CREATE TABLE SOUP (LIKE other_table) DISTKEY(soup1) SORTKEY(soup2) DISTSTYLE ALL"
        )
        self.validate_identity(
            "CREATE TABLE sales (salesid INTEGER NOT NULL) DISTKEY(listid) COMPOUND SORTKEY(listid, sellerid) DISTSTYLE AUTO"
        )
        self.validate_identity(
            "COPY customer FROM 's3://mybucket/customer' IAM_ROLE 'arn:aws:iam::0123456789012:role/MyRedshiftRole'"
        )
        self.validate_identity(
            "UNLOAD ('select * from venue') TO 's3://mybucket/unload/' IAM_ROLE 'arn:aws:iam::0123456789012:role/MyRedshiftRole'"
        )
        self.validate_identity(
            "CREATE TABLE SOUP (SOUP1 VARCHAR(50) NOT NULL ENCODE ZSTD, SOUP2 VARCHAR(70) NULL ENCODE DELTA)"
        )
        self.validate_identity(
            "SELECT DATEADD(day, 1, 'today')",
            "SELECT DATEADD(day, 1, CAST('today' AS DATE))",
        )
        self.validate_identity(
            "SELECT DATEADD('day', ndays, caldate)",
            "SELECT DATEADD(day, ndays, CAST(caldate AS DATE))",
        )
        self.validate_identity(
            "CONVERT(INT, x)",
            "CAST(x AS INTEGER)",
        )
        self.validate_identity(
            "SELECT DATE_ADD('day', 1, DATE('2023-01-01'))",
            "SELECT DATEADD(day, 1, CAST(DATE('2023-01-01') AS DATE))",
        )

    def test_values(self):
        # Test crazy-sized VALUES clause to UNION ALL conversion to ensure we don't get RecursionError
        values = [str(v) for v in range(0, 10000)]
        values_query = f"SELECT * FROM (VALUES {', '.join('(' + v + ')' for v in values)})"
        union_query = f"SELECT * FROM ({' UNION ALL '.join('SELECT ' + v for v in values)})"
        self.assertEqual(transpile(values_query, write="redshift")[0], union_query)

        self.validate_identity(
            "SELECT * FROM (VALUES (1), (2))",
            """SELECT
  *
FROM (
  SELECT
    1
  UNION ALL
  SELECT
    2
)""",
            pretty=True,
        )

        self.validate_all(
            "SELECT * FROM (VALUES (1, 2)) AS t",
            write={
                "redshift": "SELECT * FROM (SELECT 1, 2) AS t",
                "mysql": "SELECT * FROM (SELECT 1, 2) AS t",
                "presto": "SELECT * FROM (VALUES (1, 2)) AS t",
            },
        )
        self.validate_all(
            "SELECT * FROM (VALUES (1)) AS t1(id) CROSS JOIN (VALUES (1)) AS t2(id)",
            write={
                "redshift": "SELECT * FROM (SELECT 1 AS id) AS t1 CROSS JOIN (SELECT 1 AS id) AS t2",
            },
        )
        self.validate_all(
            "SELECT a, b FROM (VALUES (1, 2)) AS t (a, b)",
            write={
                "redshift": "SELECT a, b FROM (SELECT 1 AS a, 2 AS b) AS t",
            },
        )
        self.validate_all(
            'SELECT a, b FROM (VALUES (1, 2), (3, 4)) AS "t" (a, b)',
            write={
                "redshift": 'SELECT a, b FROM (SELECT 1 AS a, 2 AS b UNION ALL SELECT 3, 4) AS "t"',
            },
        )
        self.validate_all(
            "SELECT a, b FROM (VALUES (1, 2), (3, 4), (5, 6), (7, 8)) AS t (a, b)",
            write={
                "redshift": "SELECT a, b FROM (SELECT 1 AS a, 2 AS b UNION ALL SELECT 3, 4 UNION ALL SELECT 5, 6 UNION ALL SELECT 7, 8) AS t",
            },
        )
        self.validate_all(
            "INSERT INTO t(a) VALUES (1), (2), (3)",
            write={
                "redshift": "INSERT INTO t (a) VALUES (1), (2), (3)",
            },
        )
        self.validate_all(
            "INSERT INTO t(a, b) SELECT a, b FROM (VALUES (1, 2), (3, 4)) AS t (a, b)",
            write={
                "redshift": "INSERT INTO t (a, b) SELECT a, b FROM (SELECT 1 AS a, 2 AS b UNION ALL SELECT 3, 4) AS t",
            },
        )
        self.validate_all(
            "INSERT INTO t(a, b) VALUES (1, 2), (3, 4)",
            write={
                "redshift": "INSERT INTO t (a, b) VALUES (1, 2), (3, 4)",
            },
        )
        self.validate_identity(
            'SELECT * FROM (VALUES (1)) AS "t"(a)',
            '''SELECT
  *
FROM (
  SELECT
    1 AS a
) AS "t"''',
            pretty=True,
        )

    def test_create_table_like(self):
        self.validate_all(
            "CREATE TABLE t1 LIKE t2",
            write={
                "redshift": "CREATE TABLE t1 (LIKE t2)",
            },
        )
        self.validate_all(
            "CREATE TABLE SOUP (LIKE other_table) DISTKEY(soup1) SORTKEY(soup2) DISTSTYLE ALL",
            write={
                "redshift": "CREATE TABLE SOUP (LIKE other_table) DISTKEY(soup1) SORTKEY(soup2) DISTSTYLE ALL",
            },
        )

    def test_rename_table(self):
        self.validate_all(
            "ALTER TABLE db.t1 RENAME TO db.t2",
            write={
                "spark": "ALTER TABLE db.t1 RENAME TO db.t2",
                "redshift": "ALTER TABLE db.t1 RENAME TO t2",
            },
        )

    def test_varchar_max(self):
        self.validate_all(
            "CREATE TABLE TEST (cola VARCHAR(MAX))",
            write={
                "redshift": 'CREATE TABLE "TEST" ("cola" VARCHAR(MAX))',
            },
            identify=True,
        )

    def test_no_schema_binding(self):
        self.validate_all(
            "CREATE OR REPLACE VIEW v1 AS SELECT cola, colb FROM t1 WITH NO SCHEMA BINDING",
            write={
                "redshift": "CREATE OR REPLACE VIEW v1 AS SELECT cola, colb FROM t1 WITH NO SCHEMA BINDING",
            },
        )

    def test_concat(self):
        self.validate_all(
            "SELECT CONCAT('abc', 'def')",
            write={
                "redshift": "SELECT COALESCE(CAST('abc' AS VARCHAR(MAX)), '') || COALESCE(CAST('def' AS VARCHAR(MAX)), '')",
            },
        )
        self.validate_all(
            "SELECT CONCAT_WS('DELIM', 'abc', 'def', 'ghi')",
            write={
                "redshift": "SELECT COALESCE(CAST('abc' AS VARCHAR(MAX)), '') || 'DELIM' || COALESCE(CAST('def' AS VARCHAR(MAX)), '') || 'DELIM' || COALESCE(CAST('ghi' AS VARCHAR(MAX)), '')",
            },
        )