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sqlglot/tests/test_transpile.py
Daniel Baumann 0c79f8b507
Merging upstream version 10.4.2.
Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-13 15:01:55 +01:00

543 lines
20 KiB
Python

import os
import unittest
from unittest import mock
from sqlglot import parse_one, transpile
from sqlglot.errors import ErrorLevel, ParseError, UnsupportedError
from tests.helpers import (
assert_logger_contains,
load_sql_fixture_pairs,
load_sql_fixtures,
)
class TestTranspile(unittest.TestCase):
file_dir = os.path.dirname(__file__)
fixtures_dir = os.path.join(file_dir, "fixtures")
maxDiff = None
def validate(self, sql, target, **kwargs):
self.assertEqual(transpile(sql, **kwargs)[0], target)
def test_alias(self):
self.assertEqual(transpile("SELECT 1 current_time")[0], "SELECT 1 AS current_time")
self.assertEqual(
transpile("SELECT 1 current_timestamp")[0], "SELECT 1 AS current_timestamp"
)
self.assertEqual(transpile("SELECT 1 current_date")[0], "SELECT 1 AS current_date")
self.assertEqual(transpile("SELECT 1 current_datetime")[0], "SELECT 1 AS current_datetime")
self.assertEqual(transpile("SELECT 1 row")[0], "SELECT 1 AS row")
for key in ("union", "over", "from", "join"):
with self.subTest(f"alias {key}"):
self.validate(f"SELECT x AS {key}", f"SELECT x AS {key}")
self.validate(f'SELECT x "{key}"', f'SELECT x AS "{key}"')
with self.assertRaises(ParseError):
self.validate(f"SELECT x {key}", "")
def test_asc(self):
self.validate("SELECT x FROM y ORDER BY x ASC", "SELECT x FROM y ORDER BY x")
def test_unary(self):
self.validate("+++1", "1")
self.validate("+-1", "-1")
self.validate("+- - -1", "- - -1")
def test_paren(self):
with self.assertRaises(ParseError):
transpile("1 + (2 + 3")
transpile("select f(")
def test_some(self):
self.validate(
"SELECT * FROM x WHERE a = SOME (SELECT 1)",
"SELECT * FROM x WHERE a = ANY (SELECT 1)",
)
def test_leading_comma(self):
self.validate(
"SELECT FOO, BAR, BAZ",
"SELECT\n FOO\n , BAR\n , BAZ",
leading_comma=True,
pretty=True,
)
self.validate(
"SELECT FOO, /*x*/\nBAR, /*y*/\nBAZ",
"SELECT\n FOO /* x */\n , BAR /* y */\n , BAZ",
leading_comma=True,
pretty=True,
)
# without pretty, this should be a no-op
self.validate(
"SELECT FOO, BAR, BAZ",
"SELECT FOO, BAR, BAZ",
leading_comma=True,
)
def test_space(self):
self.validate("SELECT MIN(3)>MIN(2)", "SELECT MIN(3) > MIN(2)")
self.validate("SELECT MIN(3)>=MIN(2)", "SELECT MIN(3) >= MIN(2)")
self.validate("SELECT 1>0", "SELECT 1 > 0")
self.validate("SELECT 3>=3", "SELECT 3 >= 3")
def test_comments(self):
self.validate("SELECT */*comment*/", "SELECT * /* comment */")
self.validate(
"SELECT * FROM table /*comment 1*/ /*comment 2*/",
"SELECT * FROM table /* comment 1 */ /* comment 2 */",
)
self.validate("SELECT 1 FROM foo -- comment", "SELECT 1 FROM foo /* comment */")
self.validate("SELECT --+5\nx FROM foo", "/* +5 */ SELECT x FROM foo")
self.validate("SELECT --!5\nx FROM foo", "/* !5 */ SELECT x FROM foo")
self.validate(
"SELECT 1 /* inline */ FROM foo -- comment",
"SELECT 1 /* inline */ FROM foo /* comment */",
)
self.validate(
"SELECT FUN(x) /*x*/, [1,2,3] /*y*/", "SELECT FUN(x) /* x */, ARRAY(1, 2, 3) /* y */"
)
self.validate(
"""
SELECT 1 -- comment
FROM foo -- comment
""",
"SELECT 1 /* comment */ FROM foo /* comment */",
)
self.validate(
"""
SELECT 1 /* big comment
like this */
FROM foo -- comment
""",
"""SELECT 1 /* big comment
like this */ FROM foo /* comment */""",
)
self.validate(
"select x from foo -- x",
"SELECT x FROM foo /* x */",
)
self.validate(
"""
-- comment 1
-- comment 2
-- comment 3
SELECT * FROM foo
""",
"/* comment 1 */ /* comment 2 */ /* comment 3 */ SELECT * FROM foo",
)
self.validate(
"""
-- comment 1
-- comment 2
-- comment 3
SELECT * FROM foo""",
"""/* comment 1 */
/* comment 2 */
/* comment 3 */
SELECT
*
FROM foo""",
pretty=True,
)
self.validate(
"""
SELECT * FROM tbl /*line1
line2
line3*/ /*another comment*/ where 1=1 -- comment at the end""",
"""SELECT * FROM tbl /* line1
line2
line3 */ /* another comment */ WHERE 1 = 1 /* comment at the end */""",
)
self.validate(
"""
SELECT * FROM tbl /*line1
line2
line3*/ /*another comment*/ where 1=1 -- comment at the end""",
"""SELECT
*
FROM tbl /* line1
line2
line3 */
/* another comment */
WHERE
1 = 1 /* comment at the end */""",
pretty=True,
)
self.validate(
"""
/* multi
line
comment
*/
SELECT
tbl.cola /* comment 1 */ + tbl.colb /* comment 2 */,
CAST(x AS INT), # comment 3
y -- comment 4
FROM
bar /* comment 5 */,
tbl # comment 6
""",
"""/* multi
line
comment
*/
SELECT
tbl.cola /* comment 1 */ + tbl.colb /* comment 2 */,
CAST(x AS INT), /* comment 3 */
y /* comment 4 */
FROM bar /* comment 5 */, tbl /* comment 6 */""",
read="mysql",
pretty=True,
)
def test_types(self):
self.validate("INT x", "CAST(x AS INT)")
self.validate("VARCHAR x y", "CAST(x AS VARCHAR) AS y")
self.validate("STRING x y", "CAST(x AS TEXT) AS y")
self.validate("x::INT", "CAST(x AS INT)")
self.validate("x::INTEGER", "CAST(x AS INT)")
self.validate("x::INT y", "CAST(x AS INT) AS y")
self.validate("x::INT AS y", "CAST(x AS INT) AS y")
self.validate("x::INT::BOOLEAN", "CAST(CAST(x AS INT) AS BOOLEAN)")
self.validate("CAST(x::INT AS BOOLEAN)", "CAST(CAST(x AS INT) AS BOOLEAN)")
self.validate("CAST(x AS INT)::BOOLEAN", "CAST(CAST(x AS INT) AS BOOLEAN)")
with self.assertRaises(ParseError):
transpile("x::z")
def test_not_range(self):
self.validate("a NOT LIKE b", "NOT a LIKE b")
self.validate("a NOT BETWEEN b AND c", "NOT a BETWEEN b AND c")
self.validate("a NOT IN (1, 2)", "NOT a IN (1, 2)")
self.validate("a IS NOT NULL", "NOT a IS NULL")
self.validate("a LIKE TEXT y", "a LIKE CAST(y AS TEXT)")
def test_extract(self):
self.validate(
"EXTRACT(day FROM '2020-01-01'::TIMESTAMP)",
"EXTRACT(day FROM CAST('2020-01-01' AS TIMESTAMP))",
)
self.validate(
"EXTRACT(timezone FROM '2020-01-01'::TIMESTAMP)",
"EXTRACT(timezone FROM CAST('2020-01-01' AS TIMESTAMP))",
)
self.validate(
"EXTRACT(year FROM '2020-01-01'::TIMESTAMP WITH TIME ZONE)",
"EXTRACT(year FROM CAST('2020-01-01' AS TIMESTAMPTZ))",
)
self.validate(
"extract(month from '2021-01-31'::timestamp without time zone)",
"EXTRACT(month FROM CAST('2021-01-31' AS TIMESTAMP))",
)
self.validate("extract(week from current_date + 2)", "EXTRACT(week FROM CURRENT_DATE + 2)")
self.validate(
"EXTRACT(minute FROM datetime1 - datetime2)",
"EXTRACT(minute FROM datetime1 - datetime2)",
)
def test_if(self):
self.validate(
"SELECT IF(a > 1, 1, 0) FROM foo",
"SELECT CASE WHEN a > 1 THEN 1 ELSE 0 END FROM foo",
)
self.validate(
"SELECT IF a > 1 THEN b END",
"SELECT CASE WHEN a > 1 THEN b END",
)
self.validate(
"SELECT IF a > 1 THEN b ELSE c END",
"SELECT CASE WHEN a > 1 THEN b ELSE c END",
)
self.validate("SELECT IF(a > 1, 1) FROM foo", "SELECT CASE WHEN a > 1 THEN 1 END FROM foo")
def test_ignore_nulls(self):
self.validate("SELECT COUNT(x RESPECT NULLS)", "SELECT COUNT(x)")
def test_with(self):
self.validate(
"WITH a AS (SELECT 1) WITH b AS (SELECT 2) SELECT *",
"WITH a AS (SELECT 1), b AS (SELECT 2) SELECT *",
)
self.validate(
"WITH a AS (SELECT 1), WITH b AS (SELECT 2) SELECT *",
"WITH a AS (SELECT 1), b AS (SELECT 2) SELECT *",
)
self.validate(
"WITH A(filter) AS (VALUES 1, 2, 3) SELECT * FROM A WHERE filter >= 2",
"WITH A(filter) AS (VALUES (1), (2), (3)) SELECT * FROM A WHERE filter >= 2",
)
def test_alter(self):
self.validate(
"ALTER TABLE integers ADD k INTEGER",
"ALTER TABLE integers ADD COLUMN k INT",
)
self.validate("ALTER TABLE integers DROP k", "ALTER TABLE integers DROP COLUMN k")
self.validate(
"ALTER TABLE integers ALTER i SET DATA TYPE VARCHAR",
"ALTER TABLE integers ALTER COLUMN i TYPE VARCHAR",
)
self.validate(
"ALTER TABLE integers ALTER i TYPE VARCHAR COLLATE foo USING bar",
"ALTER TABLE integers ALTER COLUMN i TYPE VARCHAR COLLATE foo USING bar",
)
def test_time(self):
self.validate("TIMESTAMP '2020-01-01'", "CAST('2020-01-01' AS TIMESTAMP)")
self.validate("TIMESTAMP WITH TIME ZONE '2020-01-01'", "CAST('2020-01-01' AS TIMESTAMPTZ)")
self.validate(
"TIMESTAMP(9) WITH TIME ZONE '2020-01-01'",
"CAST('2020-01-01' AS TIMESTAMPTZ(9))",
)
self.validate(
"TIMESTAMP WITHOUT TIME ZONE '2020-01-01'",
"CAST('2020-01-01' AS TIMESTAMP)",
)
self.validate("'2020-01-01'::TIMESTAMP", "CAST('2020-01-01' AS TIMESTAMP)")
self.validate(
"'2020-01-01'::TIMESTAMP WITHOUT TIME ZONE",
"CAST('2020-01-01' AS TIMESTAMP)",
)
self.validate(
"'2020-01-01'::TIMESTAMP WITH TIME ZONE",
"CAST('2020-01-01' AS TIMESTAMPTZ)",
)
self.validate(
"timestamp with time zone '2025-11-20 00:00:00+00' AT TIME ZONE 'Africa/Cairo'",
"CAST('2025-11-20 00:00:00+00' AS TIMESTAMPTZ) AT TIME ZONE 'Africa/Cairo'",
)
self.validate("DATE '2020-01-01'", "CAST('2020-01-01' AS DATE)")
self.validate("'2020-01-01'::DATE", "CAST('2020-01-01' AS DATE)")
self.validate("STR_TO_TIME('x', 'y')", "STRPTIME('x', 'y')", write="duckdb")
self.validate("STR_TO_UNIX('x', 'y')", "EPOCH(STRPTIME('x', 'y'))", write="duckdb")
self.validate("TIME_TO_STR(x, 'y')", "STRFTIME(x, 'y')", write="duckdb")
self.validate("TIME_TO_UNIX(x)", "EPOCH(x)", write="duckdb")
self.validate(
"UNIX_TO_STR(123, 'y')",
"STRFTIME(TO_TIMESTAMP(CAST(123 AS BIGINT)), 'y')",
write="duckdb",
)
self.validate(
"UNIX_TO_TIME(123)",
"TO_TIMESTAMP(CAST(123 AS BIGINT))",
write="duckdb",
)
self.validate(
"STR_TO_TIME(x, 'y')",
"CAST(FROM_UNIXTIME(UNIX_TIMESTAMP(x, 'y')) AS TIMESTAMP)",
write="hive",
)
self.validate(
"STR_TO_TIME(x, 'yyyy-MM-dd HH:mm:ss')",
"CAST(x AS TIMESTAMP)",
write="hive",
)
self.validate(
"STR_TO_TIME(x, 'yyyy-MM-dd')",
"CAST(x AS TIMESTAMP)",
write="hive",
)
self.validate(
"STR_TO_UNIX('x', 'y')",
"UNIX_TIMESTAMP('x', 'y')",
write="hive",
)
self.validate("TIME_TO_STR(x, 'y')", "DATE_FORMAT(x, 'y')", write="hive")
self.validate("TIME_STR_TO_TIME(x)", "TIME_STR_TO_TIME(x)", write=None)
self.validate("TIME_STR_TO_UNIX(x)", "TIME_STR_TO_UNIX(x)", write=None)
self.validate("TIME_TO_TIME_STR(x)", "CAST(x AS TEXT)", write=None)
self.validate("TIME_TO_STR(x, 'y')", "TIME_TO_STR(x, 'y')", write=None)
self.validate("TIME_TO_UNIX(x)", "TIME_TO_UNIX(x)", write=None)
self.validate("UNIX_TO_STR(x, 'y')", "UNIX_TO_STR(x, 'y')", write=None)
self.validate("UNIX_TO_TIME(x)", "UNIX_TO_TIME(x)", write=None)
self.validate("UNIX_TO_TIME_STR(x)", "UNIX_TO_TIME_STR(x)", write=None)
self.validate("TIME_STR_TO_DATE(x)", "TIME_STR_TO_DATE(x)", write=None)
self.validate("TIME_STR_TO_DATE(x)", "TO_DATE(x)", write="hive")
self.validate("UNIX_TO_STR(x, 'yyyy-MM-dd HH:mm:ss')", "FROM_UNIXTIME(x)", write="hive")
self.validate("STR_TO_UNIX(x, 'yyyy-MM-dd HH:mm:ss')", "UNIX_TIMESTAMP(x)", write="hive")
self.validate("IF(x > 1, x + 1)", "IF(x > 1, x + 1)", write="presto")
self.validate("IF(x > 1, 1 + 1)", "IF(x > 1, 1 + 1)", write="hive")
self.validate("IF(x > 1, 1, 0)", "IF(x > 1, 1, 0)", write="hive")
self.validate(
"TIME_TO_UNIX(x)",
"UNIX_TIMESTAMP(x)",
write="hive",
)
self.validate("UNIX_TO_STR(123, 'y')", "FROM_UNIXTIME(123, 'y')", write="hive")
self.validate(
"UNIX_TO_TIME(123)",
"FROM_UNIXTIME(123)",
write="hive",
)
self.validate("STR_TO_TIME('x', 'y')", "DATE_PARSE('x', 'y')", write="presto")
self.validate("STR_TO_UNIX('x', 'y')", "TO_UNIXTIME(DATE_PARSE('x', 'y'))", write="presto")
self.validate("TIME_TO_STR(x, 'y')", "DATE_FORMAT(x, 'y')", write="presto")
self.validate("TIME_TO_UNIX(x)", "TO_UNIXTIME(x)", write="presto")
self.validate(
"UNIX_TO_STR(123, 'y')",
"DATE_FORMAT(FROM_UNIXTIME(123), 'y')",
write="presto",
)
self.validate("UNIX_TO_TIME(123)", "FROM_UNIXTIME(123)", write="presto")
self.validate("STR_TO_TIME('x', 'y')", "TO_TIMESTAMP('x', 'y')", write="spark")
self.validate("STR_TO_UNIX('x', 'y')", "UNIX_TIMESTAMP('x', 'y')", write="spark")
self.validate("TIME_TO_STR(x, 'y')", "DATE_FORMAT(x, 'y')", write="spark")
self.validate(
"TIME_TO_UNIX(x)",
"UNIX_TIMESTAMP(x)",
write="spark",
)
self.validate("UNIX_TO_STR(123, 'y')", "FROM_UNIXTIME(123, 'y')", write="spark")
self.validate(
"UNIX_TO_TIME(123)",
"FROM_UNIXTIME(123)",
write="spark",
)
self.validate(
"CREATE TEMPORARY TABLE test AS SELECT 1",
"CREATE TEMPORARY VIEW test AS SELECT 1",
write="spark",
)
@mock.patch("sqlglot.helper.logger")
def test_index_offset(self, mock_logger):
self.validate("x[0]", "x[1]", write="presto", identity=False)
self.validate("x[1]", "x[0]", read="presto", identity=False)
mock_logger.warning.assert_any_call("Applying array index offset (%s)", 1)
mock_logger.warning.assert_any_call("Applying array index offset (%s)", -1)
def test_identity(self):
self.assertEqual(transpile("")[0], "")
for sql in load_sql_fixtures("identity.sql"):
with self.subTest(sql):
self.assertEqual(transpile(sql)[0], sql.strip())
def test_normalize_name(self):
self.assertEqual(
transpile("cardinality(x)", read="presto", write="presto", normalize_functions="lower")[
0
],
"cardinality(x)",
)
def test_partial(self):
for sql in load_sql_fixtures("partial.sql"):
with self.subTest(sql):
self.assertEqual(transpile(sql, error_level=ErrorLevel.IGNORE)[0], sql.strip())
def test_pretty(self):
for _, sql, pretty in load_sql_fixture_pairs("pretty.sql"):
with self.subTest(sql[:100]):
generated = transpile(sql, pretty=True)[0]
self.assertEqual(generated, pretty)
self.assertEqual(parse_one(sql), parse_one(pretty))
@mock.patch("sqlglot.parser.logger")
def test_error_level(self, logger):
invalid = "x + 1. ("
expected_messages = [
"Required keyword: 'expressions' missing for <class 'sqlglot.expressions.Aliases'>. Line 1, Col: 8.\n x + 1. \033[4m(\033[0m",
"Expecting ). Line 1, Col: 8.\n x + 1. \033[4m(\033[0m",
]
expected_errors = [
{
"description": "Required keyword: 'expressions' missing for <class 'sqlglot.expressions.Aliases'>",
"line": 1,
"col": 8,
"start_context": "x + 1. ",
"highlight": "(",
"end_context": "",
"into_expression": None,
},
{
"description": "Expecting )",
"line": 1,
"col": 8,
"start_context": "x + 1. ",
"highlight": "(",
"end_context": "",
"into_expression": None,
},
]
transpile(invalid, error_level=ErrorLevel.WARN)
for error in expected_messages:
assert_logger_contains(error, logger)
with self.assertRaises(ParseError) as ctx:
transpile(invalid, error_level=ErrorLevel.IMMEDIATE)
self.assertEqual(str(ctx.exception), expected_messages[0])
self.assertEqual(ctx.exception.errors[0], expected_errors[0])
with self.assertRaises(ParseError) as ctx:
transpile(invalid, error_level=ErrorLevel.RAISE)
self.assertEqual(str(ctx.exception), "\n\n".join(expected_messages))
self.assertEqual(ctx.exception.errors, expected_errors)
more_than_max_errors = "(((("
expected_messages = (
"Expecting ). Line 1, Col: 4.\n (((\033[4m(\033[0m\n\n"
"Required keyword: 'this' missing for <class 'sqlglot.expressions.Paren'>. Line 1, Col: 4.\n (((\033[4m(\033[0m\n\n"
"Expecting ). Line 1, Col: 4.\n (((\033[4m(\033[0m\n\n"
"... and 2 more"
)
expected_errors = [
{
"description": "Expecting )",
"line": 1,
"col": 4,
"start_context": "(((",
"highlight": "(",
"end_context": "",
"into_expression": None,
},
{
"description": "Required keyword: 'this' missing for <class 'sqlglot.expressions.Paren'>",
"line": 1,
"col": 4,
"start_context": "(((",
"highlight": "(",
"end_context": "",
"into_expression": None,
},
]
# Also expect three trailing structured errors that match the first
expected_errors += [expected_errors[0]] * 3
with self.assertRaises(ParseError) as ctx:
transpile(more_than_max_errors, error_level=ErrorLevel.RAISE)
self.assertEqual(str(ctx.exception), expected_messages)
self.assertEqual(ctx.exception.errors, expected_errors)
@mock.patch("sqlglot.generator.logger")
def test_unsupported_level(self, logger):
def unsupported(level):
transpile(
"SELECT MAP(a, b), MAP(a, b), MAP(a, b), MAP(a, b)",
read="presto",
write="hive",
unsupported_level=level,
)
error = "Cannot convert array columns into map."
unsupported(ErrorLevel.WARN)
assert_logger_contains("\n".join([error] * 4), logger, level="warning")
with self.assertRaises(UnsupportedError) as ctx:
unsupported(ErrorLevel.RAISE)
self.assertEqual(str(ctx.exception).count(error), 3)
with self.assertRaises(UnsupportedError) as ctx:
unsupported(ErrorLevel.IMMEDIATE)
self.assertEqual(str(ctx.exception).count(error), 1)