null count inaccurate for estimated rowcount
Bug #1383835 reported by
Barry Fritchman
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Trafodion |
Fix Committed
|
Medium
|
Barry Fritchman | ||
Bug Description
When an HBase table's row count is estimated, the number of KeyValues is adjusted by the estimated number of nulls, as represented by missing KeyValues in a sampling of rows. The count of nulls can be inaccurate in the rare case that all columns in a row except the (single-column) primary key are null. This reduces the accuracy of the row count estimate.
| Changed in trafodion: | |
| assignee: | nobody → Barry Fritchman (barry-fritchman) |
| importance: | Undecided → Medium |
| status: | New → In Progress |
| Changed in trafodion: | |
| status: | In Progress → Fix Committed |
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