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https://issues.apache.org/jira/browse/PHOENIX-514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14259494#comment-14259494
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Thomas D'Silva commented on PHOENIX-514:
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James,
Thanks a lot for the detailed spec.
I had a question about whether we need to store the expression as a VARCHAR in
SYSTEM.CATALOG or if I can just store the serialized value and expression
ordinal and then deserialize using
{code}
expression = ExpressionType.values()[expressionOrdinal].newInstance();
expression.readFields()
{code}
Will this also handle compound expressions since BaseCompoundExpression.write
would serialize them correctly?
> Support functional indexes
> --------------------------
>
> Key: PHOENIX-514
> URL: https://issues.apache.org/jira/browse/PHOENIX-514
> Project: Phoenix
> Issue Type: Task
> Reporter: James Taylor
> Assignee: Thomas D'Silva
> Labels: enhancement
>
> Instead of only defining the set of columns from the data table that make up
> an index, you should be able to use expressions. For example:
> CREATE INDEX upper_last_name_idx ON person (UPPER(last_name))
> Then in queries that use UPPER(last_name), we can replace them with column
> references to the index table.
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