Michael Kolupaev

Would be nice to have undo, like Ctrl-/ in bash or Ctrl-_ in readline.

Track memory allocated by the arrow library

1

### Changelog category (leave one): - Bug Fix (user-visible misbehavior in an official stable release) ### Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md): Fixed...

Parquet: read columns in parallel

1

Currently ParquetBlockInputFormat parallelizes reading at row group granularity. I.e. it reads+decodes multiple row groups in parallel, but each row group reading+decoding is single-threaded. It would probably be better to be...

Fix filter pushdown for Parquet and maybe StorageMerge

4

### Changelog category (leave one): - Bug Fix (user-visible misbehavior in an official stable release) ### Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md): Fixed...

Fix 'set' skip index not working with IN, indexHint(), and subqueries

2

### Changelog category (leave one): - Bug Fix (user-visible misbehavior in an official stable release) ### Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md): Fixed...

Make KeyCondition usable outside *MergeTree when analyzer is enabled

5

If I'm reading the code correctly: * when analyzer is enabled, `SelectQueryInfo::filter_asts` doesn't have sets, and is probably missing some casts, * so, KeyCondition shouldn't use it, * instead it...

Fuzzer found this: ``` % build/programs/clickhouse local -q "SELECT toTypeName(res), if(0, range(plus(number)), CAST(concat(toNullable('str_')), 'Nullable(String)')) AS res FROM numbers(['str_', toNullable(toUInt256(4)), 'd', 1, 1, CAST(toNullable('str_1'), 'Nullable(String)'), NULL, 1, 'str_2', 5, 5], 2,...

Analyzer found this: ``` SELECT arrayFilter(x -> notEmpty(concat(x, 'hello')), ['']) FROM system.one ARRAY JOIN [0] AS elem, arrayMap(x -> concat(x, ignore(ignore(toLowCardinality('03147_parquet_memory_tracking.parquet'), 37, 37, toUInt128(37), 37, 37, toLowCardinality(37), 37), 8, ignore(ignore(1.,...

Change default s3_throw_on_zero_files_match to true, document that presigned S3 URLs are not supported

1

### Changelog category (leave one): - Backward Incompatible Change ### Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md): Default value of setting `s3_throw_on_zero_files_match` changed from...

Make usearch index use mmap for local files

3

### Changelog category (leave one): - Not for changelog (changelog entry is not required) This PR is stacked on top of https://github.com/ClickHouse/ClickHouse/pull/54103 and https://github.com/ClickHouse/ClickHouse/pull/54101 . Please review just the last...