[DRILL-2611] Value vectors report invalid value count

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Component/s: Execution - Data Types
• Assignee: Hanifi Gunes
• Reporter: Hanifi Gunes
• Created: 27/Mar/15 21:39
• Updated: 29/Apr/15 00:17
• Resolved: 16/Apr/15 21:17

Description

We maintain an exclusive value count variable in fixed vectors however we don't update it upon calling set/Safe. Accessor reports the value count from the variable ignoring values that are already in the buffer or written via set/Safe. This causes execution failures manifested as IOOB when underlying data is sparse. We should either remove the variable and report value count directly investigating the buffer if not computationally expensive or update the variable each time we make a write to the vector.

Issue Links

• depends upon: DRILL-2719 Behavior of ValueVector#getBuffers(clear) is inconsistent across VV types