ClickHouse/docs/en/sql-reference/dictionaries/external-dictionaries
Azat Khuzhin 808d1a0215 Reimplement preallocate for hashed/sparse_hashed dictionaries
It was initially implemented in #15454, but was reverted in #21948 (due
to higher memory usage).

This implementation differs from the initial, since now there is
separate attribute to enable preallocation, before it was done
automatically, but this has problems with duplicates in the source.

Plus this implementation does not uses dynamic_cast, instead it extends
IDictionarySource interface.
2021-05-10 07:41:48 +03:00
..
external-dicts-dict-hierarchical.md Remove broken "Original article" 2021-03-14 15:19:04 +03:00
external-dicts-dict-layout.md Reimplement preallocate for hashed/sparse_hashed dictionaries 2021-05-10 07:41:48 +03:00
external-dicts-dict-lifetime.md Remove broken "Original article" 2021-03-14 15:19:04 +03:00
external-dicts-dict-polygon.md DOCSUP-3123: Edited the ReplicatedMergeTree and Polygon dictionaries (#16110) 2020-11-08 22:42:28 +03:00
external-dicts-dict-sources.md Merge branch 'master' into revolg-DOCSUP-5920-PostgreSQL_function_dictionary_engine 2021-03-20 12:48:25 +03:00
external-dicts-dict-structure.md Added Polygon NULL support from #21890 2021-04-04 12:47:33 +03:00
external-dicts-dict.md Remove broken "Original article" 2021-03-14 15:19:04 +03:00
external-dicts.md Remove broken "Original article" 2021-03-14 15:19:04 +03:00
index.md [docs] replace underscores with hyphens (#10606) 2020-04-30 21:19:18 +03:00