database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-04-25 21:42:33 +03:00
Code

Include test for CASE expression.

Browse Source
This commit is contained in:
Thomas G. Lockhart 1998-12-04 15:36:51 +00:00
parent bedd04a551
commit 47e506fb8f
3 changed files with 173 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
src/test/regress/expected/case.out Normal file
View File

@ -0,0 +1,94 @@
QUERY: SELECT '' AS "One",
CASE
WHEN 1 < 2 THEN 3
END AS "One only = 3";
One|One only = 3
---+------------
| 3
(1 row)
QUERY: SELECT '' AS "One",
CASE
WHEN 1 > 2 THEN 3
END AS "One only = Null";
One|One only = Null
---+---------------
|
(1 row)
QUERY: SELECT '' AS "One",
CASE
WHEN 1 < 2 THEN 3
ELSE 4
END AS "One with default = 3";
One|One with default = 3
---+--------------------
| 3
(1 row)
QUERY: SELECT '' AS "One",
CASE
WHEN 1 > 2 THEN 3
ELSE 4
END AS "One with default = 4";
One|One with default = 4
---+--------------------
| 4
(1 row)
QUERY: SELECT '' AS "One",
CASE
WHEN 1 > 2 THEN 3
WHEN 4 < 5 THEN 6
ELSE 7
END AS "Two with default = 6";
One|Two with default = 6
---+--------------------
| 6
(1 row)
QUERY: SELECT '' AS "Five",
CASE
WHEN f1 >= 0 THEN f1
END AS ">= 0 or Null"
FROM INT4_TBL;
Five|>= 0 or Null
----+------------
| 0
| 123456
|
| 2147483647
|
(5 rows)
QUERY: SELECT '' AS "Five",
CASE WHEN f1 >= 0 THEN (f1 - f1)
ELSE f1
END AS "Simplest Math"
FROM INT4_TBL;
Five|Simplest Math
----+-------------
| 0
| 0
| -123456
| 0
| -2147483647
(5 rows)
QUERY: SELECT '' AS "Five", f1 AS "Value",
CASE WHEN (f1 < 0) THEN 'small'
WHEN (f1 = 0) THEN 'zero'
WHEN (f1 = 1) THEN 'one'
WHEN (f1 = 2) THEN 'two'
ELSE 'big'
END AS "Category"
FROM INT4_TBL;
Five| Value|Category
----+-----------+--------
| 0|zero
| 123456|big
| -123456|small
| 2147483647|big
|-2147483647|small
(5 rows)

78
src/test/regress/sql/case.sql Normal file
View File

@ -0,0 +1,78 @@
--
-- case.sql
--
-- Test the case statement
--
-- Simplest examples without involving tables
--
SELECT '' AS "One",
CASE
WHEN 1 < 2 THEN 3
END AS "One only = 3";
SELECT '' AS "One",
CASE
WHEN 1 > 2 THEN 3
END AS "One only = Null";
SELECT '' AS "One",
CASE
WHEN 1 < 2 THEN 3
ELSE 4
END AS "One with default = 3";
SELECT '' AS "One",
CASE
WHEN 1 > 2 THEN 3
ELSE 4
END AS "One with default = 4";
SELECT '' AS "One",
CASE
WHEN 1 > 2 THEN 3
WHEN 4 < 5 THEN 6
ELSE 7
END AS "Two with default = 6";
--
-- Examples of targets involving tables
--
SELECT '' AS "Five",
CASE
WHEN f1 >= 0 THEN f1
END AS ">= 0 or Null"
FROM INT4_TBL;
SELECT '' AS "Five",
CASE WHEN f1 >= 0 THEN (f1 - f1)
ELSE f1
END AS "Simplest Math"
FROM INT4_TBL;
SELECT '' AS "Five", f1 AS "Value",
CASE WHEN (f1 < 0) THEN 'small'
WHEN (f1 = 0) THEN 'zero'
WHEN (f1 = 1) THEN 'one'
WHEN (f1 = 2) THEN 'two'
ELSE 'big'
END AS "Category"
FROM INT4_TBL;
/*
SELECT '' AS "Five",
CASE WHEN ((f1 < 0) or (i < 0)) THEN 'small'
WHEN ((f1 = 0) or (i = 0)) THEN 'zero'
WHEN ((f1 = 1) or (i = 1)) THEN 'one'
WHEN ((f1 = 2) or (i = 2)) THEN 'two'
ELSE 'big'
END AS "Category"
FROM INT4_TBL;
*/
--
-- Examples of qualifications involving tables
--

1
src/test/regress/sql/tests
View File

@ -49,6 +49,7 @@ select_implicit
select_having
subselect
union
case
aggregates
transactions
random