Module materialize.checks.all_checks.window_functions
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# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.
from textwrap import dedent
from materialize.checks.actions import Testdrive
from materialize.checks.checks import Check
class WindowFunctions(Check):
def initialize(self) -> Testdrive:
return Testdrive(
dedent(
"""
> CREATE TABLE window_functions_table (f1 INTEGER, f2 INTEGER);
> INSERT INTO window_functions_table VALUES (1,1), (2, 1), (3, 1);
"""
)
)
def manipulate(self) -> list[Testdrive]:
return [
Testdrive(dedent(s))
for s in [
"""
> CREATE MATERIALIZED VIEW window_functions_view1 AS
SELECT
row_number() OVER (PARTITION BY f1 ORDER BY f2),
dense_rank() OVER (PARTITION BY f2 ORDER BY f1 DESC),
lag(f1, f2, f1) OVER (ORDER BY f2),
lead(f2, f1, f2) OVER (PARTITION BY f1),
row_number() OVER (RANGE UNBOUNDED PRECEDING) AS range1,
row_number() OVER (RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS range2,
row_number() OVER (ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING) AS rows_between,
first_value(f1) OVER (ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING)
FROM window_functions_table;
> INSERT INTO window_functions_table VALUES (1, 2), (2, 2), (3, 2);
""",
"""
> CREATE MATERIALIZED VIEW window_functions_view2 AS
SELECT
row_number() OVER (PARTITION BY f1 ORDER BY f2),
dense_rank() OVER (PARTITION BY f2 ORDER BY f1 DESC),
lag(f1, f2, f1) OVER (ORDER BY f2),
lead(f2, f1, f2) OVER (PARTITION BY f1),
row_number() OVER (RANGE UNBOUNDED PRECEDING) AS range1,
row_number() OVER (RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS range2,
row_number() OVER (ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING) AS rows_between,
first_value(f1) OVER (ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING)
FROM window_functions_table;
> INSERT INTO window_functions_table VALUES (1, 2), (2, 2), (3, 2);
""",
]
]
def validate(self) -> Testdrive:
return Testdrive(
dedent(
"""
> SELECT * FROM window_functions_view1;
1 1 2 1 7 7 7 2
1 2 1 2 4 4 4 1
1 3 1 2 1 1 1 <null>
2 1 2 2 8 8 8 2
2 2 1 2 5 5 5 1
2 3 2 2 2 2 2 1
3 1 2 2 9 9 9 3
3 2 1 2 6 6 6 2
3 3 3 2 3 3 3 1
> SELECT * FROM window_functions_view2;
1 1 2 1 7 7 7 2
1 2 1 2 4 4 4 1
1 3 1 2 1 1 1 <null>
2 1 2 2 8 8 8 2
2 2 1 2 5 5 5 1
2 3 2 2 2 2 2 1
3 1 2 2 9 9 9 3
3 2 1 2 6 6 6 2
3 3 3 2 3 3 3 1
"""
)
)
Classes
class WindowFunctions (base_version: MzVersion, rng: random.Random | None)
-
Expand source code Browse git
class WindowFunctions(Check): def initialize(self) -> Testdrive: return Testdrive( dedent( """ > CREATE TABLE window_functions_table (f1 INTEGER, f2 INTEGER); > INSERT INTO window_functions_table VALUES (1,1), (2, 1), (3, 1); """ ) ) def manipulate(self) -> list[Testdrive]: return [ Testdrive(dedent(s)) for s in [ """ > CREATE MATERIALIZED VIEW window_functions_view1 AS SELECT row_number() OVER (PARTITION BY f1 ORDER BY f2), dense_rank() OVER (PARTITION BY f2 ORDER BY f1 DESC), lag(f1, f2, f1) OVER (ORDER BY f2), lead(f2, f1, f2) OVER (PARTITION BY f1), row_number() OVER (RANGE UNBOUNDED PRECEDING) AS range1, row_number() OVER (RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS range2, row_number() OVER (ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING) AS rows_between, first_value(f1) OVER (ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING) FROM window_functions_table; > INSERT INTO window_functions_table VALUES (1, 2), (2, 2), (3, 2); """, """ > CREATE MATERIALIZED VIEW window_functions_view2 AS SELECT row_number() OVER (PARTITION BY f1 ORDER BY f2), dense_rank() OVER (PARTITION BY f2 ORDER BY f1 DESC), lag(f1, f2, f1) OVER (ORDER BY f2), lead(f2, f1, f2) OVER (PARTITION BY f1), row_number() OVER (RANGE UNBOUNDED PRECEDING) AS range1, row_number() OVER (RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS range2, row_number() OVER (ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING) AS rows_between, first_value(f1) OVER (ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING) FROM window_functions_table; > INSERT INTO window_functions_table VALUES (1, 2), (2, 2), (3, 2); """, ] ] def validate(self) -> Testdrive: return Testdrive( dedent( """ > SELECT * FROM window_functions_view1; 1 1 2 1 7 7 7 2 1 2 1 2 4 4 4 1 1 3 1 2 1 1 1 <null> 2 1 2 2 8 8 8 2 2 2 1 2 5 5 5 1 2 3 2 2 2 2 2 1 3 1 2 2 9 9 9 3 3 2 1 2 6 6 6 2 3 3 3 2 3 3 3 1 > SELECT * FROM window_functions_view2; 1 1 2 1 7 7 7 2 1 2 1 2 4 4 4 1 1 3 1 2 1 1 1 <null> 2 1 2 2 8 8 8 2 2 2 1 2 5 5 5 1 2 3 2 2 2 2 2 1 3 1 2 2 9 9 9 3 3 2 1 2 6 6 6 2 3 3 3 2 3 3 3 1 """ ) )
Ancestors
Methods
def initialize(self) ‑> Testdrive
-
Expand source code Browse git
def initialize(self) -> Testdrive: return Testdrive( dedent( """ > CREATE TABLE window_functions_table (f1 INTEGER, f2 INTEGER); > INSERT INTO window_functions_table VALUES (1,1), (2, 1), (3, 1); """ ) )
def manipulate(self) ‑> list[Testdrive]
-
Expand source code Browse git
def manipulate(self) -> list[Testdrive]: return [ Testdrive(dedent(s)) for s in [ """ > CREATE MATERIALIZED VIEW window_functions_view1 AS SELECT row_number() OVER (PARTITION BY f1 ORDER BY f2), dense_rank() OVER (PARTITION BY f2 ORDER BY f1 DESC), lag(f1, f2, f1) OVER (ORDER BY f2), lead(f2, f1, f2) OVER (PARTITION BY f1), row_number() OVER (RANGE UNBOUNDED PRECEDING) AS range1, row_number() OVER (RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS range2, row_number() OVER (ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING) AS rows_between, first_value(f1) OVER (ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING) FROM window_functions_table; > INSERT INTO window_functions_table VALUES (1, 2), (2, 2), (3, 2); """, """ > CREATE MATERIALIZED VIEW window_functions_view2 AS SELECT row_number() OVER (PARTITION BY f1 ORDER BY f2), dense_rank() OVER (PARTITION BY f2 ORDER BY f1 DESC), lag(f1, f2, f1) OVER (ORDER BY f2), lead(f2, f1, f2) OVER (PARTITION BY f1), row_number() OVER (RANGE UNBOUNDED PRECEDING) AS range1, row_number() OVER (RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS range2, row_number() OVER (ROWS BETWEEN 1 FOLLOWING AND UNBOUNDED FOLLOWING) AS rows_between, first_value(f1) OVER (ROWS BETWEEN 2 PRECEDING AND 1 PRECEDING) FROM window_functions_table; > INSERT INTO window_functions_table VALUES (1, 2), (2, 2), (3, 2); """, ] ]
def validate(self) ‑> Testdrive
-
Expand source code Browse git
def validate(self) -> Testdrive: return Testdrive( dedent( """ > SELECT * FROM window_functions_view1; 1 1 2 1 7 7 7 2 1 2 1 2 4 4 4 1 1 3 1 2 1 1 1 <null> 2 1 2 2 8 8 8 2 2 2 1 2 5 5 5 1 2 3 2 2 2 2 2 1 3 1 2 2 9 9 9 3 3 2 1 2 6 6 6 2 3 3 3 2 3 3 3 1 > SELECT * FROM window_functions_view2; 1 1 2 1 7 7 7 2 1 2 1 2 4 4 4 1 1 3 1 2 1 1 1 <null> 2 1 2 2 8 8 8 2 2 2 1 2 5 5 5 1 2 3 2 2 2 2 2 1 3 1 2 2 9 9 9 3 3 2 1 2 6 6 6 2 3 3 3 2 3 3 3 1 """ ) )