Add fast row key only scanning
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Key: HBASE-1481
URL: https://issues.apache.org/jira/browse/HBASE-1481
Project: Hadoop HBase
Issue Type: Improvement
Affects Versions: 0.19.3
Reporter: Lars George
Priority: Minor
Fix For: 0.20.0, 0.21.0
Instead of requiring a user to set up a scanner with any column and scan the
table to gather all row keys while ignoring the column value we should have a
fast and lightweight scanner that for example takes a "null" for the column
list and then simply returns only the matching keys of all non-empty or deleted
rows. Filters should still be applicable.
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