Daniel Barclay (Drill) created DRILL-4010: ---------------------------------------------
Summary: In HBase reader, create child vectors for referenced HBase columns to avoid spurious schema changes Key: DRILL-4010 URL: https://issues.apache.org/jira/browse/DRILL-4010 Project: Apache Drill Issue Type: Bug Components: Execution - Data Types, Storage - HBase Reporter: Daniel Barclay (Drill) {{HBaseRecordReader}} needs to create child vectors for all referenced/requested columns. Currently, if a fragment reads only HBase rows that don't have a particular referenced column (within a given column family), downstream code adds a dummy column of type {{NullableIntVector}} (as a child in the {{MapVector}} for the containing HBase column family). If any other fragment reads an HBase row that _does_ contain the referenced column, that fragment's reader will create a child {{NullableVarBinaryVector}} for the referenced column. When the data from those two fragments comes together, Drill detects a schema change, even though logically there isn't really any schema change. -- This message was sent by Atlassian JIRA (v6.3.4#6332)