Dayue Gao d25f0ba69a Make ColumnReader load lazily (#2026) ...

[Storage][SegmentV2]
Currently `segment_v2::Segment::open` will eagerly initialize all column readers, regardless of whether the column is queried or not. Initializing `segment_v2::ColumnReader` incurs additional I/O cost to read ordinal index and zonemap index and should be delayed to the time it's needed.

2019-10-23 10:25:28 +08:00

..

agent

Refactor Storage Engine (#1478)

2019-07-15 21:18:22 +08:00

common

Uniform Status (#1317)

2019-06-14 23:38:31 +08:00

env

Use Env function to operate directory (#1980)

2019-10-15 09:25:12 +08:00

exec

Limit the memory usage of Loading process (#1954)

2019-10-15 09:26:20 +08:00

exprs

Make HLL be able to handle invalid data (#1908)

2019-09-29 10:55:23 +08:00

geo

Add spatial func (#1213)

2019-05-31 14:23:09 +08:00

http

Uniform Status (#1317)

2019-06-14 23:38:31 +08:00

olap

Make ColumnReader load lazily (#2026)

2019-10-23 10:25:28 +08:00

runtime

Modify fixed partition feature (#1989)

2019-10-16 16:03:46 +08:00

udf

Change variable and namespace name in BE (#268)

2018-11-02 10:22:32 +08:00

util

Replace Arena with MemPool (#2012)

2019-10-19 15:53:24 +08:00