Add functions ADDTIME and SUBTIME. (#132)

[Yury-Fridlyand]

Signed-off-by: Yury-Fridlyand yuryf@bitquilltech.com

Description

I referred to MySQL docs and tried to reproduce MySQL v.8.0.30 behavior as a reference.

Please, see team review and discussion on Bit-Quill#132.

New functions: ADDTIME/SUBTIME.

Changes

Adds or subtracts time to/from date and returns the result.

Signature

(TIME, TIME/DATE/DATETIME/TIMESTAMP) -> TIME
(DATE/DATETIME/TIMESTAMP, TIME/DATE/DATETIME/TIMESTAMP) -> DATETIME

Future changes (TODOs):

1. Accept strings as MySQL does
2. Update if and after [Discussion] Do we need to support more than 24 hours in TIME? #852

Test queries:

SELECT ADDTIME(TIME('23:59:59'), TIMESTAMP('2008-11-15 01:00:00'));
SELECT ADDTIME(TIME('23:59:59'), DATE('2004-01-01'));
SELECT ADDTIME(DATE('2008-12-12'), DATE('2008-11-15'));
SELECT ADDTIME(TIME('23:59:59'), DATETIME('2008-11-15 01:00:00'));

Test data

I found that first 6 rows from date0, time0, time1, datetime0 are good for testing - these columns have different data types in MySQL. In OpenSearch SQL all [date][time] columns have timestamp type, so I use CAST for clear testing.

data

mysql> show fields from Calcs where field IN ('date0', 'time0', 'time1', 'datetime0');
+-----------+-----------+------+-----+---------+-------+
| Field     | Type      | Null | Key | Default | Extra |
+-----------+-----------+------+-----+---------+-------+
| date0     | date      | YES  |     | NULL    |       |
| time0     | datetime  | YES  |     | NULL    |       |
| time1     | time      | YES  |     | NULL    |       |
| datetime0 | timestamp | YES  |     | NULL    |       |
+-----------+-----------+------+-----+---------+-------+
4 rows in set (0.00 sec)
mysql> select date0, time0, time1, datetime0 from calcs;
+------------+---------------------+----------+---------------------+
| date0      | time0               | time1    | datetime0           |
+------------+---------------------+----------+---------------------+
| 2004-04-15 | 1899-12-30 21:07:32 | 19:36:22 | 2004-07-09 10:17:35 |
| 1972-07-04 | 1900-01-01 13:48:48 | 02:05:25 | 2004-07-26 12:30:34 |
| 1975-11-12 | 1900-01-01 18:21:08 | 09:33:31 | 2004-08-02 07:59:23 |
| 2004-06-04 | 1900-01-01 18:51:48 | 22:50:16 | 2004-07-05 13:14:20 |
| 2004-06-19 | 1900-01-01 15:01:19 | NULL     | 2004-07-28 23:30:22 |
| NULL       | 1900-01-01 08:59:39 | 19:57:33 | 2004-07-22 00:30:23 |
| NULL       | 1900-01-01 07:37:48 | NULL     | 2004-07-28 06:54:50 |
| NULL       | 1900-01-01 19:45:54 | 19:48:23 | 2004-07-12 17:30:16 |
| NULL       | 1900-01-01 09:00:59 | 22:20:14 | 2004-07-04 22:49:28 |
| NULL       | 1900-01-01 20:36:00 | NULL     | 2004-07-23 21:13:37 |
| NULL       | 1900-01-01 01:31:32 | 00:05:57 | 2004-07-14 08:16:44 |
| NULL       | 1899-12-30 22:15:40 | 04:40:49 | 2004-07-25 15:22:26 |
| NULL       | 1900-01-01 13:53:46 | 04:48:07 | 2004-07-17 14:01:56 |
| NULL       | 1900-01-01 04:57:51 | NULL     | 2004-07-19 22:21:31 |
| NULL       | 1899-12-30 22:42:43 | 18:58:41 | 2004-07-31 11:57:52 |
| NULL       | 1899-12-30 22:24:08 | NULL     | 2004-07-14 07:43:00 |
| NULL       | 1900-01-01 11:58:29 | 12:33:57 | 2004-07-28 12:34:28 |
+------------+---------------------+----------+---------------------+
17 rows in set (0.00 sec)

Fixes

https://forum.opensearch.org/t/subdate-date-sub-query-method-not-supported/9252

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.90%. Comparing base (aae57a0) to head (1b46be4).
⚠️ Report is 822 commits behind head on main.

❌ Your project status has failed because the head coverage (95.90%) is below the target coverage (99.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1194      +/-   ##
============================================
- Coverage     98.34%   95.90%   -2.44%     
- Complexity     3584     3593       +9     
============================================
  Files           344      354      +10     
  Lines          8858     9566     +708     
  Branches        559      680     +121     
============================================
+ Hits           8711     9174     +463     
- Misses          142      334     +192     
- Partials          5       58      +53     

Flag	Coverage Δ
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sql-engine	98.34% <100.00%> (+<0.01%)	⬆️

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[dai-chen]

@Yury-Fridlyand There seems some conflicts blocking the merge.

[Yury-Fridlyand]

Fixed, please re-approve.