from sqlglot import UnsupportedError from tests.dialects.test_dialect import Validator class TestSnowflake(Validator): dialect = "snowflake" def test_snowflake(self): self.validate_all( 'x:a:"b c"', write={ "duckdb": "x['a']['b c']", "hive": "x['a']['b c']", "presto": "x['a']['b c']", "snowflake": "x['a']['b c']", "spark": "x['a']['b c']", }, ) self.validate_all( "SELECT a FROM test WHERE a = 1 GROUP BY a HAVING a = 2 QUALIFY z ORDER BY a LIMIT 10", write={ "bigquery": "SELECT a FROM test WHERE a = 1 GROUP BY a HAVING a = 2 QUALIFY z ORDER BY a NULLS LAST LIMIT 10", "snowflake": "SELECT a FROM test WHERE a = 1 GROUP BY a HAVING a = 2 QUALIFY z ORDER BY a LIMIT 10", }, ) self.validate_all( "SELECT a FROM test AS t QUALIFY ROW_NUMBER() OVER (PARTITION BY a ORDER BY Z) = 1", write={ "bigquery": "SELECT a FROM test AS t QUALIFY ROW_NUMBER() OVER (PARTITION BY a ORDER BY Z NULLS LAST) = 1", "snowflake": "SELECT a FROM test AS t QUALIFY ROW_NUMBER() OVER (PARTITION BY a ORDER BY Z) = 1", }, ) self.validate_all( "SELECT TO_TIMESTAMP(1659981729)", write={ "bigquery": "SELECT UNIX_TO_TIME(1659981729)", "snowflake": "SELECT TO_TIMESTAMP(1659981729)", "spark": "SELECT FROM_UNIXTIME(1659981729)", }, ) self.validate_all( "SELECT TO_TIMESTAMP(1659981729000, 3)", write={ "bigquery": "SELECT UNIX_TO_TIME(1659981729000, 'millis')", "snowflake": "SELECT TO_TIMESTAMP(1659981729000, 3)", "spark": "SELECT TIMESTAMP_MILLIS(1659981729000)", }, ) self.validate_all( "SELECT TO_TIMESTAMP('1659981729')", write={ "bigquery": "SELECT UNIX_TO_TIME('1659981729')", "snowflake": "SELECT TO_TIMESTAMP('1659981729')", "spark": "SELECT FROM_UNIXTIME('1659981729')", }, ) self.validate_all( "SELECT TO_TIMESTAMP(1659981729000000000, 9)", write={ "bigquery": "SELECT UNIX_TO_TIME(1659981729000000000, 'micros')", "snowflake": "SELECT TO_TIMESTAMP(1659981729000000000, 9)", "spark": "SELECT TIMESTAMP_MICROS(1659981729000000000)", }, ) self.validate_all( "SELECT TO_TIMESTAMP('2013-04-05 01:02:03')", write={ "bigquery": "SELECT PARSE_TIMESTAMP('%Y-%m-%d %H:%M:%S', '2013-04-05 01:02:03')", "snowflake": "SELECT TO_TIMESTAMP('2013-04-05 01:02:03', 'yyyy-mm-dd hh24:mi:ss')", "spark": "SELECT TO_TIMESTAMP('2013-04-05 01:02:03', 'yyyy-MM-dd HH:mm:ss')", }, ) self.validate_all( "SELECT TO_TIMESTAMP('04/05/2013 01:02:03', 'mm/dd/yyyy hh24:mi:ss')", read={ "bigquery": "SELECT PARSE_TIMESTAMP('%m/%d/%Y %H:%M:%S', '04/05/2013 01:02:03')", "duckdb": "SELECT STRPTIME('04/05/2013 01:02:03', '%m/%d/%Y %H:%M:%S')", "snowflake": "SELECT TO_TIMESTAMP('04/05/2013 01:02:03', 'mm/dd/yyyy hh24:mi:ss')", }, write={ "bigquery": "SELECT PARSE_TIMESTAMP('%m/%d/%Y %H:%M:%S', '04/05/2013 01:02:03')", "snowflake": "SELECT TO_TIMESTAMP('04/05/2013 01:02:03', 'mm/dd/yyyy hh24:mi:ss')", "spark": "SELECT TO_TIMESTAMP('04/05/2013 01:02:03', 'MM/dd/yyyy HH:mm:ss')", }, ) self.validate_all( "SELECT IFF(TRUE, 'true', 'false')", write={ "snowflake": "SELECT IFF(TRUE, 'true', 'false')", }, ) self.validate_all( "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname ASC NULLS LAST, lname", write={ "duckdb": "SELECT fname, lname, age FROM person ORDER BY age DESC NULLS FIRST, fname NULLS LAST, lname NULLS LAST", "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", "snowflake": "SELECT fname, lname, age FROM person ORDER BY age DESC, fname, lname", }, ) self.validate_all( "SELECT ARRAY_AGG(DISTINCT a)", write={ "spark": "SELECT COLLECT_LIST(DISTINCT a)", "snowflake": "SELECT ARRAY_AGG(DISTINCT a)", }, ) self.validate_all( "SELECT * FROM a INTERSECT ALL SELECT * FROM b", write={ "snowflake": UnsupportedError, }, ) self.validate_all( "SELECT * FROM a EXCEPT ALL SELECT * FROM b", write={ "snowflake": UnsupportedError, }, ) self.validate_all( "SELECT ARRAY_UNION_AGG(a)", write={ "snowflake": "SELECT ARRAY_UNION_AGG(a)", }, ) self.validate_all( "SELECT NVL2(a, b, c)", write={ "snowflake": "SELECT NVL2(a, b, c)", }, ) self.validate_all( "SELECT $$a$$", write={ "snowflake": "SELECT 'a'", }, ) self.validate_all( r"SELECT $$a ' \ \t \x21 z $ $$", write={ "snowflake": r"SELECT 'a \' \\ \\t \\x21 z $ '", }, ) self.validate_identity("SELECT REGEXP_LIKE(a, b, c)") self.validate_all( "SELECT RLIKE(a, b)", write={ "snowflake": "SELECT REGEXP_LIKE(a, b)", }, ) self.validate_all( "SELECT a FROM test SAMPLE BLOCK (0.5) SEED (42)", write={ "snowflake": "SELECT a FROM test TABLESAMPLE BLOCK (0.5) SEED (42)", }, ) self.validate_all( "SELECT a FROM test pivot", write={ "snowflake": "SELECT a FROM test AS pivot", }, ) self.validate_all( "SELECT a FROM test unpivot", write={ "snowflake": "SELECT a FROM test AS unpivot", }, ) self.validate_all( "trim(date_column, 'UTC')", write={ "bigquery": "TRIM(date_column, 'UTC')", "snowflake": "TRIM(date_column, 'UTC')", "postgres": "TRIM('UTC' FROM date_column)", }, ) self.validate_all( "trim(date_column)", write={ "snowflake": "TRIM(date_column)", "bigquery": "TRIM(date_column)", }, ) self.validate_all( "DECODE(x, a, b, c, d)", read={ "": "MATCHES(x, a, b, c, d)", }, write={ "": "MATCHES(x, a, b, c, d)", "oracle": "DECODE(x, a, b, c, d)", "snowflake": "DECODE(x, a, b, c, d)", }, ) def test_null_treatment(self): self.validate_all( r"SELECT FIRST_VALUE(TABLE1.COLUMN1) OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1", write={ "snowflake": r"SELECT FIRST_VALUE(TABLE1.COLUMN1) OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1" }, ) self.validate_all( r"SELECT FIRST_VALUE(TABLE1.COLUMN1 RESPECT NULLS) OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1", write={ "snowflake": r"SELECT FIRST_VALUE(TABLE1.COLUMN1) OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1" }, ) self.validate_all( r"SELECT FIRST_VALUE(TABLE1.COLUMN1) RESPECT NULLS OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1", write={ "snowflake": r"SELECT FIRST_VALUE(TABLE1.COLUMN1) RESPECT NULLS OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1" }, ) self.validate_all( r"SELECT FIRST_VALUE(TABLE1.COLUMN1 IGNORE NULLS) OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1", write={ "snowflake": r"SELECT FIRST_VALUE(TABLE1.COLUMN1 IGNORE NULLS) OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1" }, ) self.validate_all( r"SELECT FIRST_VALUE(TABLE1.COLUMN1) IGNORE NULLS OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1", write={ "snowflake": r"SELECT FIRST_VALUE(TABLE1.COLUMN1) IGNORE NULLS OVER (PARTITION BY RANDOM_COLUMN1, RANDOM_COLUMN2 ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS MY_ALIAS FROM TABLE1" }, ) def test_timestamps(self): self.validate_all( "SELECT CAST(a AS TIMESTAMP)", write={ "snowflake": "SELECT CAST(a AS TIMESTAMPNTZ)", }, ) self.validate_all( "SELECT a::TIMESTAMP_LTZ(9)", write={ "snowflake": "SELECT CAST(a AS TIMESTAMPLTZ(9))", }, ) self.validate_all( "SELECT a::TIMESTAMPLTZ", write={ "snowflake": "SELECT CAST(a AS TIMESTAMPLTZ)", }, ) self.validate_all( "SELECT a::TIMESTAMP WITH LOCAL TIME ZONE", write={ "snowflake": "SELECT CAST(a AS TIMESTAMPLTZ)", }, ) self.validate_identity("SELECT EXTRACT(month FROM a)") self.validate_all( "SELECT EXTRACT('month', a)", write={ "snowflake": "SELECT EXTRACT('month' FROM a)", }, ) self.validate_all( "SELECT DATE_PART('month', a)", write={ "snowflake": "SELECT EXTRACT('month' FROM a)", }, ) self.validate_all( "SELECT DATE_PART(month, a::DATETIME)", write={ "snowflake": "SELECT EXTRACT(month FROM CAST(a AS DATETIME))", }, ) self.validate_all( "SELECT DATE_PART(epoch_second, foo) as ddate from table_name", write={ "snowflake": "SELECT EXTRACT(epoch_second FROM CAST(foo AS TIMESTAMPNTZ)) AS ddate FROM table_name", "presto": "SELECT TO_UNIXTIME(CAST(foo AS TIMESTAMP)) AS ddate FROM table_name", }, ) self.validate_all( "SELECT DATE_PART(epoch_milliseconds, foo) as ddate from table_name", write={ "snowflake": "SELECT EXTRACT(epoch_second FROM CAST(foo AS TIMESTAMPNTZ)) * 1000 AS ddate FROM table_name", "presto": "SELECT TO_UNIXTIME(CAST(foo AS TIMESTAMP)) * 1000 AS ddate FROM table_name", }, ) def test_semi_structured_types(self): self.validate_identity("SELECT CAST(a AS VARIANT)") self.validate_all( "SELECT a::VARIANT", write={ "snowflake": "SELECT CAST(a AS VARIANT)", "tsql": "SELECT CAST(a AS SQL_VARIANT)", }, ) self.validate_identity("SELECT CAST(a AS ARRAY)") self.validate_all( "ARRAY_CONSTRUCT(0, 1, 2)", write={ "snowflake": "[0, 1, 2]", "bigquery": "[0, 1, 2]", "duckdb": "LIST_VALUE(0, 1, 2)", "presto": "ARRAY[0, 1, 2]", "spark": "ARRAY(0, 1, 2)", }, ) self.validate_all( "SELECT a::OBJECT", write={ "snowflake": "SELECT CAST(a AS OBJECT)", }, ) def test_ddl(self): self.validate_identity( "CREATE TABLE a (x DATE, y BIGINT) WITH (PARTITION BY (x), integration='q', auto_refresh=TRUE, file_format=(type = parquet))" ) self.validate_identity("CREATE MATERIALIZED VIEW a COMMENT='...' AS SELECT 1 FROM x") self.validate_all( "CREATE OR REPLACE TRANSIENT TABLE a (id INT)", read={ "postgres": "CREATE OR REPLACE TRANSIENT TABLE a (id INT)", "snowflake": "CREATE OR REPLACE TRANSIENT TABLE a (id INT)", }, write={ "postgres": "CREATE OR REPLACE TABLE a (id INT)", "mysql": "CREATE OR REPLACE TABLE a (id INT)", "snowflake": "CREATE OR REPLACE TRANSIENT TABLE a (id INT)", }, ) def test_user_defined_functions(self): self.validate_all( "CREATE FUNCTION a(x DATE, y BIGINT) RETURNS ARRAY LANGUAGE JAVASCRIPT AS $$ SELECT 1 $$", write={ "snowflake": "CREATE FUNCTION a(x DATE, y BIGINT) RETURNS ARRAY LANGUAGE JAVASCRIPT AS ' SELECT 1 '", }, ) self.validate_all( "CREATE FUNCTION a() RETURNS TABLE (b INT) AS 'SELECT 1'", write={ "snowflake": "CREATE FUNCTION a() RETURNS TABLE (b INT) AS 'SELECT 1'", "bigquery": "CREATE TABLE FUNCTION a() RETURNS TABLE AS SELECT 1", }, ) self.validate_all( "CREATE FUNCTION a() RETURNS INT IMMUTABLE AS 'SELECT 1'", write={ "snowflake": "CREATE FUNCTION a() RETURNS INT IMMUTABLE AS 'SELECT 1'", }, ) def test_stored_procedures(self): self.validate_identity("CALL a.b.c(x, y)") self.validate_identity( "CREATE PROCEDURE a.b.c(x INT, y VARIANT) RETURNS OBJECT EXECUTE AS CALLER AS 'BEGIN SELECT 1; END;'" ) def test_table_literal(self): # All examples from https://docs.snowflake.com/en/sql-reference/literals-table.html self.validate_all( r"""SELECT * FROM TABLE('MYTABLE')""", write={"snowflake": r"""SELECT * FROM TABLE('MYTABLE')"""}, ) self.validate_all( r"""SELECT * FROM TABLE('MYDB."MYSCHEMA"."MYTABLE"')""", write={"snowflake": r"""SELECT * FROM TABLE('MYDB."MYSCHEMA"."MYTABLE"')"""}, ) # Per Snowflake documentation at https://docs.snowflake.com/en/sql-reference/literals-table.html # one can use either a " ' " or " $$ " to enclose the object identifier. # Capturing the single tokens seems like lot of work. Hence adjusting tests to use these interchangeably, self.validate_all( r"""SELECT * FROM TABLE($$MYDB. "MYSCHEMA"."MYTABLE"$$)""", write={"snowflake": r"""SELECT * FROM TABLE('MYDB. "MYSCHEMA"."MYTABLE"')"""}, ) self.validate_all( r"""SELECT * FROM TABLE($MYVAR)""", write={"snowflake": r"""SELECT * FROM TABLE($MYVAR)"""}, ) self.validate_all( r"""SELECT * FROM TABLE(?)""", write={"snowflake": r"""SELECT * FROM TABLE(?)"""}, ) self.validate_all( r"""SELECT * FROM TABLE(:BINDING)""", write={"snowflake": r"""SELECT * FROM TABLE(:BINDING)"""}, ) self.validate_all( r"""SELECT * FROM TABLE($MYVAR) WHERE COL1 = 10""", write={"snowflake": r"""SELECT * FROM TABLE($MYVAR) WHERE COL1 = 10"""}, ) def test_flatten(self): self.validate_all( """ select dag_report.acct_id, dag_report.report_date, dag_report.report_uuid, dag_report.airflow_name, dag_report.dag_id, f.value::varchar as operator from cs.telescope.dag_report, table(flatten(input=>split(operators, ','))) f """, write={ "snowflake": """SELECT dag_report.acct_id, dag_report.report_date, dag_report.report_uuid, dag_report.airflow_name, dag_report.dag_id, CAST(f.value AS VARCHAR) AS operator FROM cs.telescope.dag_report, TABLE(FLATTEN(input => SPLIT(operators, ','))) AS f""" }, pretty=True, ) # All examples from https://docs.snowflake.com/en/sql-reference/functions/flatten.html#syntax self.validate_all( "SELECT * FROM TABLE(FLATTEN(input => parse_json('[1, ,77]'))) f", write={ "snowflake": "SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('[1, ,77]'))) AS f" }, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('{"a":1, "b":[77,88]}'), outer => true)) f""", write={ "snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('{"a":1, "b":[77,88]}'), outer => TRUE)) AS f""" }, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('{"a":1, "b":[77,88]}'), path => 'b')) f""", write={ "snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('{"a":1, "b":[77,88]}'), path => 'b')) AS f""" }, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('[]'))) f""", write={"snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('[]'))) AS f"""}, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('[]'), outer => true)) f""", write={ "snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('[]'), outer => TRUE)) AS f""" }, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('{"a":1, "b":[77,88], "c": {"d":"X"}}'))) f""", write={ "snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('{"a":1, "b":[77,88], "c": {"d":"X"}}'))) AS f""" }, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('{"a":1, "b":[77,88], "c": {"d":"X"}}'), recursive => true)) f""", write={ "snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('{"a":1, "b":[77,88], "c": {"d":"X"}}'), recursive => TRUE)) AS f""" }, ) self.validate_all( """SELECT * FROM TABLE(FLATTEN(input => parse_json('{"a":1, "b":[77,88], "c": {"d":"X"}}'), recursive => true, mode => 'object')) f""", write={ "snowflake": """SELECT * FROM TABLE(FLATTEN(input => PARSE_JSON('{"a":1, "b":[77,88], "c": {"d":"X"}}'), recursive => TRUE, mode => 'object')) AS f""" }, ) self.validate_all( """ SELECT id as "ID", f.value AS "Contact", f1.value:type AS "Type", f1.value:content AS "Details" FROM persons p, lateral flatten(input => p.c, path => 'contact') f, lateral flatten(input => f.value:business) f1 """, write={ "snowflake": """SELECT id AS "ID", f.value AS "Contact", f1.value['type'] AS "Type", f1.value['content'] AS "Details" FROM persons AS p, LATERAL FLATTEN(input => p.c, path => 'contact') f, LATERAL FLATTEN(input => f.value['business']) f1""", }, pretty=True, )