from unittest import mock from sqlglot import ParseError, exp, parse_one, transpile from tests.dialects.test_dialect import Validator class TestPostgres(Validator): maxDiff = None dialect = "postgres" def test_ddl(self): self.validate_identity("CREATE TABLE public.y (x TSTZRANGE NOT NULL)") self.validate_identity("CREATE TABLE test (foo HSTORE)") self.validate_identity("CREATE TABLE test (foo JSONB)") self.validate_identity("CREATE TABLE test (foo VARCHAR(64)[])") self.validate_identity("INSERT INTO x VALUES (1, 'a', 2.0) RETURNING a") self.validate_identity("INSERT INTO x VALUES (1, 'a', 2.0) RETURNING a, b") self.validate_identity("INSERT INTO x VALUES (1, 'a', 2.0) RETURNING *") self.validate_identity( "INSERT INTO x VALUES (1, 'a', 2.0) ON CONFLICT (id) DO NOTHING RETURNING *" ) self.validate_identity( "INSERT INTO x VALUES (1, 'a', 2.0) ON CONFLICT (id) DO UPDATE SET x.id = 1 RETURNING *" ) self.validate_identity( "INSERT INTO x VALUES (1, 'a', 2.0) ON CONFLICT (id) DO UPDATE SET x.id = excluded.id RETURNING *" ) self.validate_identity( "INSERT INTO x VALUES (1, 'a', 2.0) ON CONFLICT ON CONSTRAINT pkey DO NOTHING RETURNING *" ) self.validate_identity( "INSERT INTO x VALUES (1, 'a', 2.0) ON CONFLICT ON CONSTRAINT pkey DO UPDATE SET x.id = 1 RETURNING *" ) self.validate_identity( "DELETE FROM event USING sales AS s WHERE event.eventid = s.eventid RETURNING a" ) self.validate_identity("UPDATE tbl_name SET foo = 123 RETURNING a") self.validate_all( "CREATE OR REPLACE FUNCTION function_name (input_a character varying DEFAULT NULL::character varying)", write={ "postgres": "CREATE OR REPLACE FUNCTION function_name(input_a VARCHAR DEFAULT CAST(NULL AS VARCHAR))", }, ) self.validate_all( "CREATE TABLE products (product_no INT UNIQUE, name TEXT, price DECIMAL)", write={ "postgres": "CREATE TABLE products (product_no INT UNIQUE, name TEXT, price DECIMAL)" }, ) self.validate_all( "CREATE TABLE products (product_no INT CONSTRAINT must_be_different UNIQUE, name TEXT CONSTRAINT present NOT NULL, price DECIMAL)", write={ "postgres": "CREATE TABLE products (product_no INT CONSTRAINT must_be_different UNIQUE, name TEXT CONSTRAINT present NOT NULL, price DECIMAL)" }, ) self.validate_all( "CREATE TABLE products (product_no INT, name TEXT, price DECIMAL, UNIQUE (product_no, name))", write={ "postgres": "CREATE TABLE products (product_no INT, name TEXT, price DECIMAL, UNIQUE (product_no, name))" }, ) self.validate_all( "CREATE TABLE products (" "product_no INT UNIQUE," " name TEXT," " price DECIMAL CHECK (price > 0)," " discounted_price DECIMAL CONSTRAINT positive_discount CHECK (discounted_price > 0)," " CHECK (product_no > 1)," " CONSTRAINT valid_discount CHECK (price > discounted_price))", write={ "postgres": "CREATE TABLE products (" "product_no INT UNIQUE," " name TEXT," " price DECIMAL CHECK (price > 0)," " discounted_price DECIMAL CONSTRAINT positive_discount CHECK (discounted_price > 0)," " CHECK (product_no > 1)," " CONSTRAINT valid_discount CHECK (price > discounted_price))" }, ) with self.assertRaises(ParseError): transpile("CREATE TABLE products (price DECIMAL CHECK price > 0)", read="postgres") with self.assertRaises(ParseError): transpile( "CREATE TABLE products (price DECIMAL, CHECK price > 1)", read="postgres", ) def test_unnest(self): self.validate_identity( "SELECT * FROM UNNEST(ARRAY[1, 2], ARRAY['foo', 'bar', 'baz']) AS x(a, b)" ) self.validate_all( "SELECT UNNEST(c) FROM t", write={ "hive": "SELECT EXPLODE(c) FROM t", "postgres": "SELECT UNNEST(c) FROM t", "presto": "SELECT col FROM t CROSS JOIN UNNEST(c) AS _u(col)", }, ) self.validate_all( "SELECT UNNEST(ARRAY[1])", write={ "hive": "SELECT EXPLODE(ARRAY(1))", "postgres": "SELECT UNNEST(ARRAY[1])", "presto": "SELECT col FROM UNNEST(ARRAY[1]) AS _u(col)", }, ) @mock.patch("sqlglot.helper.logger") def test_array_offset(self, logger): self.validate_all( "SELECT col[1]", write={ "hive": "SELECT col[0]", "postgres": "SELECT col[1]", "presto": "SELECT col[1]", }, ) def test_postgres(self): self.validate_identity("CAST(x AS MONEY)") self.validate_identity("CAST(x AS INT4RANGE)") self.validate_identity("CAST(x AS INT4MULTIRANGE)") self.validate_identity("CAST(x AS INT8RANGE)") self.validate_identity("CAST(x AS INT8MULTIRANGE)") self.validate_identity("CAST(x AS NUMRANGE)") self.validate_identity("CAST(x AS NUMMULTIRANGE)") self.validate_identity("CAST(x AS TSRANGE)") self.validate_identity("CAST(x AS TSMULTIRANGE)") self.validate_identity("CAST(x AS TSTZRANGE)") self.validate_identity("CAST(x AS TSTZMULTIRANGE)") self.validate_identity("CAST(x AS DATERANGE)") self.validate_identity("CAST(x AS DATEMULTIRANGE)") self.validate_identity( """LAST_VALUE("col1") OVER (ORDER BY "col2" RANGE BETWEEN INTERVAL '1 day' PRECEDING AND '1 month' FOLLOWING)""" ) self.validate_identity("SELECT ARRAY[1, 2, 3] @> ARRAY[1, 2]") self.validate_identity("SELECT ARRAY[1, 2, 3] <@ ARRAY[1, 2]") self.validate_identity("SELECT ARRAY[1, 2, 3] && ARRAY[1, 2]") self.validate_identity("$x") self.validate_identity("x$") self.validate_identity("SELECT ARRAY[1, 2, 3]") self.validate_identity("SELECT ARRAY(SELECT 1)") self.validate_identity("SELECT ARRAY_LENGTH(ARRAY[1, 2, 3], 1)") self.validate_identity("STRING_AGG(x, y)") self.validate_identity("STRING_AGG(x, ',' ORDER BY y)") self.validate_identity("STRING_AGG(x, ',' ORDER BY y DESC)") self.validate_identity("STRING_AGG(DISTINCT x, ',' ORDER BY y DESC)") self.validate_identity("SELECT CASE WHEN SUBSTRING('abcdefg') IN ('ab') THEN 1 ELSE 0 END") self.validate_identity("COMMENT ON TABLE mytable IS 'this'") self.validate_identity("SELECT e'\\xDEADBEEF'") self.validate_identity("SELECT CAST(e'\\176' AS BYTEA)") self.validate_identity("SELECT * FROM x WHERE SUBSTRING('Thomas' FROM '...$') IN ('mas')") self.validate_identity("SELECT TRIM(' X' FROM ' XXX ')") self.validate_identity("SELECT TRIM(LEADING 'bla' FROM ' XXX ' COLLATE utf8_bin)") self.validate_identity("""SELECT * FROM JSON_TO_RECORDSET(z) AS y("rank" INT)""") self.validate_identity("x ~ 'y'") self.validate_identity("x ~* 'y'") self.validate_identity( "SELECT SUM(x) OVER a, SUM(y) OVER b FROM c WINDOW a AS (PARTITION BY d), b AS (PARTITION BY e)" ) self.validate_identity( "CREATE TABLE A (LIKE B INCLUDING CONSTRAINT INCLUDING COMPRESSION EXCLUDING COMMENTS)" ) self.validate_identity( "SELECT CASE WHEN SUBSTRING('abcdefg' FROM 1) IN ('ab') THEN 1 ELSE 0 END" ) self.validate_identity( "SELECT CASE WHEN SUBSTRING('abcdefg' FROM 1 FOR 2) IN ('ab') THEN 1 ELSE 0 END" ) self.validate_identity( 'SELECT * FROM "x" WHERE SUBSTRING("x"."foo" FROM 1 FOR 2) IN (\'mas\')' ) self.validate_identity( "SELECT * FROM x WHERE SUBSTRING('Thomas' FROM '%#\"o_a#\"_' FOR '#') IN ('mas')" ) self.validate_identity( "SELECT SUBSTRING('bla' + 'foo' || 'bar' FROM 3 - 1 + 5 FOR 4 + SOME_FUNC(arg1, arg2))" ) self.validate_identity( "SELECT TO_TIMESTAMP(1284352323.5), TO_TIMESTAMP('05 Dec 2000', 'DD Mon YYYY')" ) self.validate_all( "SELECT PERCENTILE_CONT(0.5) WITHIN GROUP (ORDER BY amount)", write={ "databricks": "SELECT PERCENTILE_APPROX(amount, 0.5)", "presto": "SELECT APPROX_PERCENTILE(amount, 0.5)", "spark": "SELECT PERCENTILE_APPROX(amount, 0.5)", "trino": "SELECT APPROX_PERCENTILE(amount, 0.5)", }, ) self.validate_all( "e'x'", write={ "mysql": "x", }, ) self.validate_all( "SELECT DATE_PART('isodow'::varchar(6), current_date)", write={ "postgres": "SELECT EXTRACT(CAST('isodow' AS VARCHAR(6)) FROM CURRENT_DATE)", }, ) 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( "SELECT (DATE '2016-01-10', DATE '2016-02-01') OVERLAPS (DATE '2016-01-20', DATE '2016-02-10')", write={ "postgres": "SELECT (CAST('2016-01-10' AS DATE), CAST('2016-02-01' AS DATE)) OVERLAPS (CAST('2016-01-20' AS DATE), CAST('2016-02-10' AS DATE))", "tsql": "SELECT (CAST('2016-01-10' AS DATE), CAST('2016-02-01' AS DATE)) OVERLAPS (CAST('2016-01-20' AS DATE), CAST('2016-02-10' AS DATE))", }, ) self.validate_all( "x ^ y", write={ "": "POWER(x, y)", "postgres": "x ^ y", }, ) self.validate_all( "x # y", write={ "": "x ^ y", "postgres": "x # y", }, ) self.validate_all( "GENERATE_SERIES(a, b, ' 2 days ')", write={ "postgres": "GENERATE_SERIES(a, b, INTERVAL '2 days')", "presto": "SEQUENCE(a, b, INTERVAL '2' day)", "trino": "SEQUENCE(a, b, INTERVAL '2' day)", }, ) self.validate_all( "GENERATE_SERIES('2019-01-01'::TIMESTAMP, NOW(), '1day')", write={ "postgres": "GENERATE_SERIES(CAST('2019-01-01' AS TIMESTAMP), CURRENT_TIMESTAMP, INTERVAL '1 day')", "presto": "SEQUENCE(TRY_CAST('2019-01-01' AS TIMESTAMP), CAST(CURRENT_TIMESTAMP AS TIMESTAMP), INTERVAL '1' day)", "trino": "SEQUENCE(TRY_CAST('2019-01-01' AS TIMESTAMP), CAST(CURRENT_TIMESTAMP AS TIMESTAMP), INTERVAL '1' day)", }, ) self.validate_all( "GENERATE_SERIES(a, b)", write={ "postgres": "GENERATE_SERIES(a, b)", "presto": "SEQUENCE(a, b)", "trino": "SEQUENCE(a, b)", "tsql": "GENERATE_SERIES(a, b)", }, ) self.validate_all( "GENERATE_SERIES(a, b)", read={ "postgres": "GENERATE_SERIES(a, b)", "presto": "SEQUENCE(a, b)", "trino": "SEQUENCE(a, b)", "tsql": "GENERATE_SERIES(a, b)", }, ) self.validate_all( "SELECT * FROM t CROSS JOIN GENERATE_SERIES(2, 4)", write={ "postgres": "SELECT * FROM t CROSS JOIN GENERATE_SERIES(2, 4)", "presto": "SELECT * FROM t CROSS JOIN UNNEST(SEQUENCE(2, 4))", "trino": "SELECT * FROM t CROSS JOIN UNNEST(SEQUENCE(2, 4))", "tsql": "SELECT * FROM t CROSS JOIN GENERATE_SERIES(2, 4)", }, ) self.validate_all( "SELECT * FROM t CROSS JOIN GENERATE_SERIES(2, 4) AS s", write={ "postgres": "SELECT * FROM t CROSS JOIN GENERATE_SERIES(2, 4) AS s", "presto": "SELECT * FROM t CROSS JOIN UNNEST(SEQUENCE(2, 4)) AS _u(s)", "trino": "SELECT * FROM t CROSS JOIN UNNEST(SEQUENCE(2, 4)) AS _u(s)", "tsql": "SELECT * FROM t CROSS JOIN GENERATE_SERIES(2, 4) AS s", }, ) self.validate_all( "END WORK AND NO CHAIN", write={"postgres": "COMMIT AND NO CHAIN"}, ) self.validate_all( "END AND CHAIN", write={"postgres": "COMMIT AND CHAIN"}, ) self.validate_all( "CREATE TABLE x (a UUID, b BYTEA)", write={ "duckdb": "CREATE TABLE x (a UUID, b BLOB)", "presto": "CREATE TABLE x (a UUID, b VARBINARY)", "hive": "CREATE TABLE x (a UUID, b BINARY)", "spark": "CREATE TABLE x (a UUID, b BINARY)", }, ) self.validate_all( "123::CHARACTER VARYING", write={"postgres": "CAST(123 AS VARCHAR)"}, ) self.validate_all( "TO_TIMESTAMP(123::DOUBLE PRECISION)", write={"postgres": "TO_TIMESTAMP(CAST(123 AS DOUBLE PRECISION))"}, ) self.validate_all( "SELECT to_timestamp(123)::time without time zone", write={"postgres": "SELECT CAST(TO_TIMESTAMP(123) AS TIME)"}, ) self.validate_all( "SELECT SUM(x) OVER (PARTITION BY a ORDER BY d ROWS 1 PRECEDING)", write={ "postgres": "SELECT SUM(x) OVER (PARTITION BY a ORDER BY d ROWS BETWEEN 1 PRECEDING AND CURRENT ROW)", }, ) self.validate_all( "SELECT * FROM x FETCH 1 ROW", write={ "postgres": "SELECT * FROM x FETCH FIRST 1 ROWS ONLY", "presto": "SELECT * FROM x FETCH FIRST 1 ROWS ONLY", "hive": "SELECT * FROM x LIMIT 1", "spark": "SELECT * FROM x LIMIT 1", "sqlite": "SELECT * FROM x LIMIT 1", }, ) self.validate_all( "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname ASC NULLS LAST, lname", write={ "postgres": "SELECT fname, lname, age FROM person ORDER BY age DESC, fname, lname", "presto": "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname, lname", "hive": "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname NULLS LAST, lname NULLS LAST", "spark": "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname NULLS LAST, lname NULLS LAST", }, ) self.validate_all( "SELECT CASE WHEN SUBSTRING('abcdefg' FROM 1 FOR 2) IN ('ab') THEN 1 ELSE 0 END", write={ "hive": "SELECT CASE WHEN SUBSTRING('abcdefg', 1, 2) IN ('ab') THEN 1 ELSE 0 END", "spark": "SELECT CASE WHEN SUBSTRING('abcdefg', 1, 2) IN ('ab') THEN 1 ELSE 0 END", }, ) self.validate_all( "SELECT * FROM x WHERE SUBSTRING(col1 FROM 3 + LENGTH(col1) - 10 FOR 10) IN (col2)", write={ "hive": "SELECT * FROM x WHERE SUBSTRING(col1, 3 + LENGTH(col1) - 10, 10) IN (col2)", "spark": "SELECT * FROM x WHERE SUBSTRING(col1, 3 + LENGTH(col1) - 10, 10) IN (col2)", }, ) self.validate_all( "SELECT SUBSTRING(CAST(2022 AS CHAR(4)) || LPAD(CAST(3 AS CHAR(2)), 2, '0') FROM 3 FOR 4)", read={ "postgres": "SELECT SUBSTRING(2022::CHAR(4) || LPAD(3::CHAR(2), 2, '0') FROM 3 FOR 4)", }, ) self.validate_all( "SELECT TRIM(BOTH ' XXX ')", write={ "mysql": "SELECT TRIM(' XXX ')", "postgres": "SELECT TRIM(' XXX ')", "hive": "SELECT TRIM(' XXX ')", }, ) self.validate_all( "TRIM(LEADING FROM ' XXX ')", write={ "mysql": "LTRIM(' XXX ')", "postgres": "LTRIM(' XXX ')", "hive": "LTRIM(' XXX ')", "presto": "LTRIM(' XXX ')", }, ) self.validate_all( "TRIM(TRAILING FROM ' XXX ')", write={ "mysql": "RTRIM(' XXX ')", "postgres": "RTRIM(' XXX ')", "hive": "RTRIM(' XXX ')", "presto": "RTRIM(' XXX ')", }, ) self.validate_all( "SELECT * FROM foo, LATERAL (SELECT * FROM bar WHERE bar.id = foo.bar_id) AS ss", read={ "postgres": "SELECT * FROM foo, LATERAL (SELECT * FROM bar WHERE bar.id = foo.bar_id) AS ss" }, ) self.validate_all( "SELECT m.name FROM manufacturers AS m LEFT JOIN LATERAL GET_PRODUCT_NAMES(m.id) pname ON TRUE WHERE pname IS NULL", write={ "postgres": "SELECT m.name FROM manufacturers AS m LEFT JOIN LATERAL GET_PRODUCT_NAMES(m.id) AS pname ON TRUE WHERE pname IS NULL", }, ) self.validate_all( "SELECT p1.id, p2.id, v1, v2 FROM polygons AS p1, polygons AS p2, LATERAL VERTICES(p1.poly) v1, LATERAL VERTICES(p2.poly) v2 WHERE (v1 <-> v2) < 10 AND p1.id <> p2.id", write={ "postgres": "SELECT p1.id, p2.id, v1, v2 FROM polygons AS p1, polygons AS p2, LATERAL VERTICES(p1.poly) AS v1, LATERAL VERTICES(p2.poly) AS v2 WHERE (v1 <-> v2) < 10 AND p1.id <> p2.id", }, ) self.validate_all( "SELECT * FROM r CROSS JOIN LATERAL unnest(array(1)) AS s(location)", write={ "postgres": "SELECT * FROM r CROSS JOIN LATERAL UNNEST(ARRAY[1]) AS s(location)", }, ) self.validate_all( "SELECT id, email, CAST(deleted AS TEXT) FROM users WHERE NOT deleted IS NULL", read={ "postgres": "SELECT id, email, CAST(deleted AS TEXT) FROM users WHERE deleted NOTNULL" }, ) self.validate_all( "SELECT id, email, CAST(deleted AS TEXT) FROM users WHERE NOT deleted IS NULL", read={ "postgres": "SELECT id, email, CAST(deleted AS TEXT) FROM users WHERE NOT deleted ISNULL" }, ) self.validate_all( "'[1,2,3]'::json->2", write={"postgres": "CAST('[1,2,3]' AS JSON) -> 2"}, ) self.validate_all( """'{"a":1,"b":2}'::json->'b'""", write={ "postgres": """CAST('{"a":1,"b":2}' AS JSON) -> 'b'""", "redshift": """CAST('{"a":1,"b":2}' AS JSON)."b\"""", }, ) self.validate_all( """'{"x": {"y": 1}}'::json->'x'->'y'""", write={"postgres": """CAST('{"x": {"y": 1}}' AS JSON) -> 'x' -> 'y'"""}, ) self.validate_all( """'{"x": {"y": 1}}'::json->'x'::json->'y'""", write={"postgres": """CAST(CAST('{"x": {"y": 1}}' AS JSON) -> 'x' AS JSON) -> 'y'"""}, ) self.validate_all( """'[1,2,3]'::json->>2""", write={"postgres": "CAST('[1,2,3]' AS JSON) ->> 2"}, ) self.validate_all( """'{"a":1,"b":2}'::json->>'b'""", write={"postgres": """CAST('{"a":1,"b":2}' AS JSON) ->> 'b'"""}, ) self.validate_all( """'{"a":[1,2,3],"b":[4,5,6]}'::json#>'{a,2}'""", write={"postgres": """CAST('{"a":[1,2,3],"b":[4,5,6]}' AS JSON) #> '{a,2}'"""}, ) self.validate_all( """'{"a":[1,2,3],"b":[4,5,6]}'::json#>>'{a,2}'""", write={"postgres": """CAST('{"a":[1,2,3],"b":[4,5,6]}' AS JSON) #>> '{a,2}'"""}, ) self.validate_all( """SELECT JSON_ARRAY_ELEMENTS((foo->'sections')::JSON) AS sections""", write={ "postgres": """SELECT JSON_ARRAY_ELEMENTS(CAST((foo -> 'sections') AS JSON)) AS sections""", "presto": """SELECT JSON_ARRAY_ELEMENTS(TRY_CAST((JSON_EXTRACT(foo, 'sections')) AS JSON)) AS sections""", }, ) self.validate_all( """x ? 'x'""", write={"postgres": "x ? 'x'"}, ) self.validate_all( "SELECT $$a$$", write={"postgres": "SELECT 'a'"}, ) self.validate_all( "SELECT $$Dianne's horse$$", write={"postgres": "SELECT 'Dianne''s horse'"}, ) self.validate_all( "UPDATE MYTABLE T1 SET T1.COL = 13", write={"postgres": "UPDATE MYTABLE AS T1 SET T1.COL = 13"}, ) self.validate_all( "x !~ 'y'", write={"postgres": "NOT x ~ 'y'"}, ) self.validate_all( "x !~* 'y'", write={"postgres": "NOT x ~* 'y'"}, ) self.validate_all( "x ~~ 'y'", write={"postgres": "x LIKE 'y'"}, ) self.validate_all( "x ~~* 'y'", write={"postgres": "x ILIKE 'y'"}, ) self.validate_all( "x !~~ 'y'", write={"postgres": "NOT x LIKE 'y'"}, ) self.validate_all( "x !~~* 'y'", write={"postgres": "NOT x ILIKE 'y'"}, ) self.validate_all( "'45 days'::interval day", write={"postgres": "CAST('45 days' AS INTERVAL day)"}, ) self.validate_all( "'x' 'y' 'z'", write={"postgres": "CONCAT('x', 'y', 'z')"}, ) self.validate_all( "x::cstring", write={"postgres": "CAST(x AS CSTRING)"}, ) self.validate_all( "TRIM(BOTH 'as' FROM 'as string as')", write={ "postgres": "TRIM(BOTH 'as' FROM 'as string as')", "spark": "TRIM(BOTH 'as' FROM 'as string as')", }, ) self.validate_all( "merge into x as x using (select id) as y on a = b WHEN matched then update set X.a = y.b", write={ "postgres": "MERGE INTO x AS x USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET a = y.b", "snowflake": "MERGE INTO x AS x USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET X.a = y.b", }, ) self.validate_all( "merge into x as z using (select id) as y on a = b WHEN matched then update set X.a = y.b", write={ "postgres": "MERGE INTO x AS z USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET a = y.b", "snowflake": "MERGE INTO x AS z USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET X.a = y.b", }, ) self.validate_all( "merge into x as z using (select id) as y on a = b WHEN matched then update set Z.a = y.b", write={ "postgres": "MERGE INTO x AS z USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET a = y.b", "snowflake": "MERGE INTO x AS z USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET Z.a = y.b", }, ) self.validate_all( "merge into x using (select id) as y on a = b WHEN matched then update set x.a = y.b", write={ "postgres": "MERGE INTO x USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET a = y.b", "snowflake": "MERGE INTO x USING (SELECT id) AS y ON a = b WHEN MATCHED THEN UPDATE SET x.a = y.b", }, ) self.validate_all( "x / y ^ z", write={ "": "x / POWER(y, z)", "postgres": "x / y ^ z", }, ) self.assertIsInstance(parse_one("id::UUID", read="postgres"), exp.TryCast) def test_bool_or(self): self.validate_all( "SELECT a, LOGICAL_OR(b) FROM table GROUP BY a", write={"postgres": "SELECT a, BOOL_OR(b) FROM table GROUP BY a"}, ) def test_string_concat(self): self.validate_all( "SELECT CONCAT('abcde', 2, NULL, 22)", write={ "postgres": "SELECT CONCAT(COALESCE(CAST('abcde' AS TEXT), ''), COALESCE(CAST(2 AS TEXT), ''), COALESCE(CAST(NULL AS TEXT), ''), COALESCE(CAST(22 AS TEXT), ''))", }, ) self.validate_all( "CONCAT(a, b)", write={ "": "CONCAT(COALESCE(CAST(a AS TEXT), ''), COALESCE(CAST(b AS TEXT), ''))", "duckdb": "CONCAT(COALESCE(CAST(a AS TEXT), ''), COALESCE(CAST(b AS TEXT), ''))", "postgres": "CONCAT(COALESCE(CAST(a AS TEXT), ''), COALESCE(CAST(b AS TEXT), ''))", "presto": "CONCAT(CAST(COALESCE(CAST(a AS VARCHAR), '') AS VARCHAR), CAST(COALESCE(CAST(b AS VARCHAR), '') AS VARCHAR))", }, ) self.validate_all( "a || b", write={ "": "a || b", "clickhouse": "CONCAT(CAST(a AS TEXT), CAST(b AS TEXT))", "duckdb": "a || b", "postgres": "a || b", "presto": "CONCAT(CAST(a AS VARCHAR), CAST(b AS VARCHAR))", }, )