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98c510c1e8
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improve the performance of numeric's ln().
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2022-08-05 09:34:12 +08:00 |
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0c5e9903ce
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improve the performance of computing the square root of numeric.
before optimization:
openGauss=# explain analyse select sqrt(t0) from t_numeric limit 10000000;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
Limit (cost=0.00..292129.20 rows=8468656 width=5) (actual time=4.152..170690.136 rows=8388608 loops=1)
-> Seq Scan on t_numeric (cost=0.00..292129.20 rows=8468656 width=5) (actual time=4.150..169250.862 rows=8388608 loops=1)
Total runtime: 171767.268 ms
(3 rows)
Time: 171768.179 ms
after optimization:
openGauss=# explain analyse select sqrt(t0) from t_numeric limit 10000000;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------
Limit (cost=0.00..292129.20 rows=8468656 width=5) (actual time=3.850..129299.312 rows=8388608 loops=1)
-> Seq Scan on t_numeric (cost=0.00..292129.20 rows=8468656 width=5) (actual time=3.848..127801.242 rows=8388608 loops=1)
Total runtime: 130378.841 ms
(3 rows)
Time: 130379.709 ms
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2022-08-04 14:25:23 +08:00 |
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812f586beb
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Reduce memory allocation and deallocation to improve the computational performance of numeric digits.
before optimization:
openGauss=# explain analyse select sqrt(t0) from t_numeric limit 10000000;
QUERY PLAN
-------------------------------------------------------------------------------------------
------------------------------------
Limit (cost=0.00..197973.49 rows=8386919 width=5) (actual time=0.054..167434.766 rows=838
8608 loops=1)
-> Seq Scan on t_numeric (cost=0.00..197973.49 rows=8386919 width=5) (actual time=0.05
3..166061.081 rows=8388608 loops=1)
Total runtime: 168495.866 ms
(3 rows)
Time: 168499.243 ms
after optimization:
openGauss=# explain analyse select sqrt(t0) from t_numeric limit 10000000;
QUERY PLAN
-------------------------------------------------------------------------------------------
------------------------------------
Limit (cost=0.00..197973.49 rows=8386919 width=5) (actual time=0.045..151376.445 rows=838
8608 loops=1)
-> Seq Scan on t_numeric (cost=0.00..197973.49 rows=8386919 width=5) (actual time=0.04
4..150108.807 rows=8388608 loops=1)
Total runtime: 152469.050 ms
(3 rows)
Time: 152472.278 ms
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2022-07-28 21:58:16 +08:00 |
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a8da82a0fb
|
Implementation of keyword ignore: using hint string
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2022-06-20 15:46:28 +08:00 |
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de223dd152
|
sync code
|
2022-03-04 23:22:16 +08:00 |
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c7b25efcff
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New features (and bug fixes)
1. alter large sequence
2. subpartition
2.1 split subpartition
2.2 truncate subpartition
3. 支持load
4. 支持start-with/connect-by
5. ...
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2021-12-29 21:33:28 +08:00 |
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1d540f4462
|
Patch for 930 release
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2021-09-23 15:19:37 +08:00 |
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ecf980b67b
|
codestyle
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2021-09-02 20:28:19 +08:00 |
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4151b06669
|
support jsonb
|
2021-05-19 21:22:02 +08:00 |
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1567043064
|
同步source code
日期: 12-26
revision: ee5b054c
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2020-12-28 22:19:21 +08:00 |
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2db9cd5fa5
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!91 pgdb compatibility support
Merge pull request !91 from 吴岳川/master
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2020-08-10 10:01:53 +08:00 |
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19ceba3326
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pg compatibility support
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2020-08-10 09:23:51 +08:00 |
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e2f884c4ba
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mod not allow divide by zero
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2020-08-06 18:51:52 +08:00 |
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815a9771fb
|
first commit for openGauss server
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2020-06-30 17:38:27 +08:00 |
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