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https://issues.apache.org/jira/browse/FLINK-3153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15329356#comment-15329356
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Jark Wu commented on FLINK-3153:
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It seems that String Comparison has been supported ?
> Support all comparisons for String type
> ---------------------------------------
>
> Key: FLINK-3153
> URL: https://issues.apache.org/jira/browse/FLINK-3153
> Project: Flink
> Issue Type: Improvement
> Components: Table API
> Reporter: Timo Walther
>
> Currently, the Table API does not support comparisons like "STRING < STRING",
> "STRING >= STRING". The ExpressionCodeGenerator needs to be adapted for that.
> It might be necessary to define the order in the TableConfig as this maybe
> depends on the Locale. We should implement it according to SQL
> implementations.
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