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43 Commits

Author SHA1 Message Date
Alexey Milovidov
7532a1d564 Added support for NULLS FIRST and LAST in ORDER BY [#CLICKHOUSE-2882]. 2017-03-12 15:56:59 +03:00
Alexey Milovidov
2b4f3b5d34 Renamed method (less confusion) [#METR-2944]. 2017-01-02 23:12:12 +03:00
Vitaliy Lyudvichenko
5aa1822fb2 Consecutive optimization for vertical merge. [#METR-23783] 2016-12-18 22:12:25 +03:00
Vitaliy Lyudvichenko
202ba912ce Vertical merging algorithm for MergeTree engines. [#METR-23305] 2016-11-29 22:41:31 +03:00
alexey-milovidov
8c2e228856 Revert "New "vertical" algorithm for MergeTrees' parts merges" 2016-11-24 23:08:54 +04:00
Vitaliy Lyudvichenko
588add5a49 Added requested changes. 
Also fixed single thread read from empty storage Log.
 2016-11-23 15:52:12 +03:00
Vitaliy Lyudvichenko
ec9bcd8054 Vertical merging algorithm for ordinary MergeTreee. 2016-11-23 15:47:19 +03:00
Alexey Milovidov
6c476974d4 Maybe better [#METR-22173]. 2016-08-04 07:51:41 +03:00
Alexey Milovidov
4c7eb03b63 Using std::shared_ptr for data types [#METR-21503]. 2016-05-28 13:35:44 +03:00
Alexey Milovidov
7f4d8d15cd Attempt to fix suboptimal performance when running query with ORDER BY and without GROUP BY to distributed table with very many remote servers [#METR-21408]. 2016-05-20 23:30:53 +03:00
Alexey Milovidov
aae7269dd0 Revert "Attempt to fix suboptimal performance when running query with ORDER BY and without GROUP BY to distributed table with very many remote servers [#METR-21408]." 
This reverts commit bd47aaeefe38a1c55ed5a225cbda49db0f8ce1dc.
 2016-05-20 23:27:04 +03:00
Alexey Milovidov
b7a05d0608 Attempt to fix suboptimal performance when running query with ORDER BY and without GROUP BY to distributed table with very many remote servers [#METR-21408]. 2016-05-20 23:01:34 +03:00
Alexey Milovidov
3923c7abce Merge 2016-04-15 20:42:51 +03:00
Alexey Milovidov
b664f367d8 Improved Summing/Aggregating streams [#METR-12588]. 2016-04-14 00:15:36 +03:00
Alexey Milovidov
49cf0f148c Better [#METR-12588]. 2016-04-13 07:15:30 +03:00
Alexey Milovidov
edc1bb39c7 Merge 2016-04-13 06:56:22 +03:00
Alexey Milovidov
13c7d0983a dbms: cutting dependency [#METR-2944].. 2016-01-12 00:46:36 +03:00
Alexey Milovidov
cc75d4603b dbms: improved performance of INSERT SELECT [#METR-19025]. 2015-11-29 16:18:12 +03:00
Alexey Milovidov
1f6def094f dbms: fixed build [#METR-18202]. 2015-09-29 22:19:54 +03:00
Alexey Milovidov
c94bd2fc09 dbms: removed useless code [#METR-16739]. 2015-06-08 23:22:02 +03:00
Alexey Milovidov
e3b0c97b0f dbms: fixed error with merging [#METR-16247]. 2015-05-12 07:55:14 +03:00
Alexey Milovidov
1685b293f7 dbms: tiny improvements [#METR-2944]. 2015-01-18 11:25:56 +03:00
Alexey Milovidov
8620b80d99 dbms: fixed collations; preparation to external sorting [#METR-2944]. 2015-01-07 18:30:11 +03:00
Alexey Milovidov
a58104c818 dbms: showing progress for INSERT SELECT query [#METR-13612]. 2014-11-09 02:52:18 +03:00
Michael Kolupaev
40d98ad7a9 dbms: more informative exception message when reading fails during merge (in lucky cases when an exception occurs instead of a segfault). [#METR-11980] 2014-07-21 15:34:43 +04:00
Sergey Fedorov
8f306f4238 Merge 2014-05-26 20:13:46 +04:00
Michael Kolupaev
b2fa912b2c Merge 2014-04-11 20:56:49 +04:00
Michael Kolupaev
ba9315d264 Merge 2014-03-14 21:03:52 +04:00
Alexey Milovidov
da62ed8c6f Merge 2013-10-01 20:38:01 +00:00
Alexey Milovidov
56d95e4268 dbms: optimized ORDER BY with LIMIT; rows_before_limit_at_least is temporarily broken [#CONV-2944]. 2013-09-16 05:44:47 +00:00
Alexey Milovidov
717a3fc591 dbms: fixed MergingSortedBlockInputStreams when one of stream is empty [#CONV-2944]. 2013-09-15 03:14:29 +00:00
Alexey Milovidov
6def419e85 dbms: development [#CONV-2944]. 2013-09-13 20:33:09 +00:00
Vyacheslav Alipov
f1c161842b added collation [#CONV-7651] 2013-05-28 16:56:05 +00:00
Alexey Milovidov
ce4161b4e0 dbms: development [#CONV-2944]. 2013-05-04 04:05:15 +00:00
Alexey Milovidov
85664affbf dbms: development of multi-queries [#CONV-2944]. 2013-05-03 10:20:53 +00:00
Alexey Milovidov
1a7af177cd dbms: development [#CONV-2944]. 2012-10-20 02:10:47 +00:00
Alexey Milovidov
ee72094d1d ███████████: development [#CONV-2944]. 2012-09-05 19:51:09 +00:00
Alexey Milovidov
d1db04f4ec dbms: development [#CONV-2944]. 2012-08-14 20:33:37 +00:00
Alexey Milovidov
eb8d9b5a97 dbms: development [#CONV-2944]. 2012-08-08 20:12:29 +00:00
Alexey Milovidov
4c931f147f dbms: development [#CONV-2944]. 2012-08-01 19:55:05 +00:00
Alexey Milovidov
75a80c192f dbms: merge sorting: probably better [#CONV-2944]. 2012-07-27 20:19:15 +00:00
Alexey Milovidov
b9cfda11ab dbms: development [#CONV-2944]. 2012-07-25 20:17:35 +00:00
Alexey Milovidov
cae3962251 dbms: development [#CONV-2944]. 2012-07-25 19:53:43 +00:00