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ASF GitHub Bot commented on DRILL-5657: --------------------------------------- Github user paul-rogers commented on the issue: https://github.com/apache/drill/pull/914 There has been discussion recently on Drill's goal of integrating with Arrow. The work to use the `Drillbuf` highlights how we can integrate with Arrow. Simply replace the `Drillbuf` usage with `ArrowBuf`, make the required changes in vector names, add a few methods to the Arrow API, and this entire mechanism can be easily ported over to use Arrow. > Implement size-aware result set loader > -------------------------------------- > > Key: DRILL-5657 > URL: https://issues.apache.org/jira/browse/DRILL-5657 > Project: Apache Drill > Issue Type: Improvement > Affects Versions: Future > Reporter: Paul Rogers > Assignee: Paul Rogers > Fix For: Future > > > A recent extension to Drill's set of test tools created a "row set" > abstraction to allow us to create, and verify, record batches with very few > lines of code. Part of this work involved creating a set of "column > accessors" in the vector subsystem. Column readers provide a uniform API to > obtain data from columns (vectors), while column writers provide a uniform > writing interface. > DRILL-5211 discusses a set of changes to limit value vectors to 16 MB in size > (to avoid memory fragmentation due to Drill's two memory allocators.) The > column accessors have proven to be so useful that they will be the basis for > the new, size-aware writers used by Drill's record readers. > A step in that direction is to retrofit the column writers to use the > size-aware {{setScalar()}} and {{setArray()}} methods introduced in > DRILL-5517. > Since the test framework row set classes are (at present) the only consumer > of the accessors, those classes must also be updated with the changes. > This then allows us to add a new "row mutator" class that handles size-aware > vector writing, including the case in which a vector fills in the middle of a > row. -- This message was sent by Atlassian JIRA (v6.4.14#64029)