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import unittest
from sqlglot import parse_one
from sqlglot.transforms import eliminate_distinct_on, unalias_group
class TestTime(unittest.TestCase):
def validate(self, transform, sql, target):
with self.subTest(sql):
self.assertEqual(parse_one(sql).transform(transform).sql(), target)
def test_unalias_group(self):
self.validate(
unalias_group,
"SELECT a, b AS b, c AS c, 4 FROM x GROUP BY a, b, x.c, 4",
"SELECT a, b AS b, c AS c, 4 FROM x GROUP BY a, b, x.c, 4",
)
self.validate(
unalias_group,
"SELECT TO_DATE(the_date) AS the_date, CUSTOM_UDF(other_col) AS other_col, last_col AS aliased_last, COUNT(*) AS the_count FROM x GROUP BY TO_DATE(the_date), CUSTOM_UDF(other_col), aliased_last",
"SELECT TO_DATE(the_date) AS the_date, CUSTOM_UDF(other_col) AS other_col, last_col AS aliased_last, COUNT(*) AS the_count FROM x GROUP BY TO_DATE(the_date), CUSTOM_UDF(other_col), 3",
)
self.validate(
unalias_group,
"SELECT SOME_UDF(TO_DATE(the_date)) AS the_date, COUNT(*) AS the_count FROM x GROUP BY SOME_UDF(TO_DATE(the_date))",
"SELECT SOME_UDF(TO_DATE(the_date)) AS the_date, COUNT(*) AS the_count FROM x GROUP BY SOME_UDF(TO_DATE(the_date))",
)
self.validate(
unalias_group,
"SELECT SOME_UDF(TO_DATE(the_date)) AS new_date, COUNT(*) AS the_count FROM x GROUP BY new_date",
"SELECT SOME_UDF(TO_DATE(the_date)) AS new_date, COUNT(*) AS the_count FROM x GROUP BY 1",
)
self.validate(
unalias_group,
"SELECT the_date AS the_date, COUNT(*) AS the_count FROM x GROUP BY the_date",
"SELECT the_date AS the_date, COUNT(*) AS the_count FROM x GROUP BY the_date",
)
def test_eliminate_distinct_on(self):
self.validate(
eliminate_distinct_on,
"SELECT DISTINCT ON (a) a, b FROM x ORDER BY c DESC",
'SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a ORDER BY c DESC) AS _row_number FROM x) WHERE "_row_number" = 1',
)
self.validate(
eliminate_distinct_on,
"SELECT DISTINCT ON (a) a, b FROM x",
'SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a) AS _row_number FROM x) WHERE "_row_number" = 1',
)
self.validate(
eliminate_distinct_on,
"SELECT DISTINCT ON (a, b) a, b FROM x ORDER BY c DESC",
'SELECT a, b FROM (SELECT a, b, ROW_NUMBER() OVER (PARTITION BY a, b ORDER BY c DESC) AS _row_number FROM x) WHERE "_row_number" = 1',
)
self.validate(
eliminate_distinct_on,
"SELECT DISTINCT a, b FROM x ORDER BY c DESC",
"SELECT DISTINCT a, b FROM x ORDER BY c DESC",
)
self.validate(
eliminate_distinct_on,
"SELECT DISTINCT ON (_row_number) _row_number FROM x ORDER BY c DESC",
'SELECT _row_number FROM (SELECT _row_number, ROW_NUMBER() OVER (PARTITION BY _row_number ORDER BY c DESC) AS _row_number_2 FROM x) WHERE "_row_number_2" = 1',
)
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