paul-rogers commented on issue #1813: DRILL-7306: Disable schema-only batch for new scan framework URL: https://github.com/apache/drill/pull/1813#issuecomment-506989680 Addressed the TestEmptyInputSql failure. The code now recognizes two cases: 1. Empty results: the reader provided a schema, but had no rows. (This is the case that failed.) 2. Null results: the reader provides neither rows nor schema. This is the case that was always being followed, even if we have a schema. Changed the query builder row set code to return an empty row set if the output contains only an empty batch and contains a schema. The code continues to return no row set if the result is null. (Oddly, Drill will return a batch with no rows and no schema if the reader returns no batches at all.) Will address other issues in separate commits.
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