7 Commits

Author	SHA1	Message	Date
NTH19	df7c967d54	when eq Filtercount <6 ,the speed of for loop is faster than hashmap ... add threshold for eqFilter	2022-08-23 18:45:36 +08:00
Serguey Zefirov	53b9a2a0f9	MCOL-4580 extent elimination for dictionary-based text/varchar types ... The idea is relatively simple - encode prefixes of collated strings as integers and use them to compute extents' ranges. Then we can eliminate extents with strings. The actual patch does have all the code there but miss one important step: we do not keep collation index, we keep charset index. Because of this, some of the tests in the bugfix suite fail and thus main functionality is turned off. The reason of this patch to be put into PR at all is that it contains changes that made CHAR/VARCHAR columns unsigned. This change is needed in vectorization work.	2022-03-02 23:53:39 +03:00
Leonid Fedorov	04752ec546	clang format apply	2022-01-21 16:43:49 +00:00
Roman Nozdrin	05897948e4	MCOL-4899 MCS now applies a correct collation running IN for character data types	2022-01-05 12:00:01 +00:00
David Hall	11ba12f6ea	MCOL-3536 collation	2020-05-19 16:22:44 -05:00
Andrew Hutchings	01446d1e22	Reformat all code to coding standard	2017-10-26 17:18:17 +01:00
david hill	f6afc42dd0	the begginning	2016-01-06 14:08:59 -06:00