[IMPALA-8913] Add query option for disabling HBase row estimation

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 3.4.0
• Epic Color: ghx-label-7
• Assignee: Quanlong Huang
• Reporter: Quanlong Huang
• Created: 30/Aug/19 12:48
• Updated: 09/Oct/19 00:56
• Resolved: 05/Sep/19 00:56

Description

IMPALA-8058 added a flag, disable_hbase_row_est, in the QueryCtx for tests to bypass the codes of estimating HBase row stats from HBase RPCs and fall back to HMS row count stats.

It's useful for point queries on high loaded HBase clusters, where we should reduce the #RPCs to HBase.

Issue Links

• links to: Code Review

Sub-Tasks

• Impala Doc: Document the query option for disabling HBase row estimation: Closed