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ASF GitHub Bot commented on DRILL-7143: --------------------------------------- paul-rogers commented on pull request #1726: DRILL-7143: Support default value for empty columns URL: https://github.com/apache/drill/pull/1726#discussion_r272855797 ########## File path: exec/vector/src/main/java/org/apache/drill/exec/vector/accessor/convert/AbstractConvertFromString.java ########## @@ -26,9 +31,214 @@ */ public abstract class AbstractConvertFromString extends AbstractWriteConverter { + /** + * Property to control how the conversion handles blanks. Blanks are + * zero-length text fields (after triming whitespace.) + */ + public static final String BLANK_ACTION_PROP = "blank-as"; Review comment: I did consider an enum. However, since these are just strings, the extra mechanism of an enum did not seem to add value: we would never actually use the enum. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > Enforce column-level constraints when using a schema > ---------------------------------------------------- > > Key: DRILL-7143 > URL: https://issues.apache.org/jira/browse/DRILL-7143 > Project: Apache Drill > Issue Type: Improvement > Affects Versions: 1.16.0 > Reporter: Paul Rogers > Assignee: Paul Rogers > Priority: Major > Fix For: 1.16.0 > > > The recently added schema framework enforces schema constraints at the table > level. We now wish to add additional constraints at the column level. > * If a column is marked as "strict", then the reader will use the exact type > and mode from the column schema, or fail if it is not possible to do so. > * If a column is marked as required, and provides a default value, then that > value is used instead of 0 if a row is missing a value for that column. > This PR may also contain other fixes the the base functional revealed through > additional testing. -- This message was sent by Atlassian JIRA (v7.6.3#76005)