Commit Graph

12 Commits

Author SHA1 Message Date
Mike Kot
6ea574525c Small fixes regarding the review 2021-03-03 16:51:41 +03:00
Mike Kot
f1ef382cf9 Added part_checksum to Replicated...Entry serialization. 2021-02-19 16:04:12 +03:00
Mike Kot
feff4c6a22 Started adding the new "ATTACH_PART" command into the replicated log
The original ticket idea was to search for the possibly available data
into the /detached folders for the GET_PART command, but
@tavplubix pointed out this would be quite expensive for an every
fetch.

So a new command is going to be introduced, ATTACH_PART, which will
cover ALTER TABLE ATTACH PART and only for which the search will start.
2021-02-15 01:59:13 +03:00
Vasily Nemkov
e5ec81f7cd Single quotes around column names 2020-12-19 20:58:23 +02:00
Vasily Nemkov
e166aae3f9 Using CSV-like strings for list of columns to deduplicate by instead of JSON-like notation. 2020-12-18 13:44:56 +02:00
Vasily Nemkov
70ea507dae OPTIMIZE DEDUPLICATE BY columns
Extended OPTIMIZE ... DEDUPLICATE syntax to allow explicit (or implicit with asterisk/column transformers) list of columns to check for duplicates on.

Following syntax variants are now supported:

OPTIMIZE TABLE table DEDUPLICATE; -- the old one
OPTIMIZE TABLE table DEDUPLICATE BY *;
OPTIMIZE TABLE table DEDUPLICATE BY * EXCEPT colX;
OPTIMIZE TABLE table DEDUPLICATE BY * EXCEPT (colX, colY);
OPTIMIZE TABLE table DEDUPLICATE BY col1,col2,col3;
OPTIMIZE TABLE table DEDUPLICATE BY COLUMNS('column-matched-by-regex');
OPTIMIZE TABLE table DEDUPLICATE BY COLUMNS('column-matched-by-regex') EXCEPT colX;
OPTIMIZE TABLE table DEDUPLICATE BY COLUMNS('column-matched-by-regex') EXCEPT (colX, colY);

Note that * behaves just like in SELECT: MATERIALIZED, and ALIAS columns are not used for expansion.
Also, it is an error to specify empty list of columns, or write an expression that results in an empty list of columns, or deduplicate by an ALIAS column.
Column transformers other than EXCEPT are not supported.
2020-12-07 09:44:07 +03:00
Nicolae Vartolomei
040aba9f85 Add uuid.txt to checksums for parts stored on disk
We are breaking backwards compatibility anyway (but agted by a setting)
2020-11-20 13:49:17 +00:00
Nicolae Vartolomei
94293ca3ce Assign UUIDs to parts only when configured to do so
Avoid breaking backwards compatibility by default for now.
2020-11-20 13:49:17 +00:00
Nicolae Vartolomei
746f8e45f5 All new parts must have uuids 2020-11-19 13:18:03 +00:00
alesapin
e42d0f60da Fix several bugs 2020-09-04 14:27:27 +03:00
alesapin
f4c7ff0376 Add fixed size of Merge TTLS 2020-09-03 16:00:13 +03:00
Ivan Lezhankin
06446b4f08 dbms/ → src/ 2020-04-03 18:14:31 +03:00