Add Thrift Column Start/Stop Read/Scan Capability
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Key: HBASE-4187
URL: https://issues.apache.org/jira/browse/HBASE-4187
Project: HBase
Issue Type: New Feature
Components: thrift
Affects Versions: 0.90.3
Reporter: Wayne
It would be great to be able to make requests through thrift for a subset of a
row via a start/stop column pattern. Below are three different read patterns
any of which would significantly help reading columns through thrift.
>From a single request perspective it would be nice to be able to specify a
>start/stop col to read in one call everything for that row with the specified
>start/stop column.
getRowWithColumnRange(tableName, row, startColumn, stopColumn)
It would also be very useful to set up a column scanner where we could stop at
any point. Basically instead of scanning rows we would scan columns for a given
row. In the below example we would set up a scanner to scan the columns and we
could read xx cols back at a time and stop any time we had "enough" data.
colScanID = colScannerOpenWithStop(tableName, row, startColumn, stopColumn)
colScannerGetList(colSanID,1000)
Lastly is would also be useful/flexible to expose columns to the current row
scanner process to basically be able to cross rows and still only receive XX
column values. The new scannerGetCols method below would return 1000 col values
at a time instead of XX rows at a time like a normal scannerGetList. This
scanner would also be able to cross rows seamlessly if needed.
scanID = scannerOpen(tableName, row)
scannerGetCols(scanID,1000)
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