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https://issues.apache.org/jira/browse/FLINK-9864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16573114#comment-16573114
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Timo Walther commented on FLINK-9864:
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We need utilities for converting a string to timestamp.
> Make timestamp extraction more flexible in SQL Client
> -----------------------------------------------------
>
> Key: FLINK-9864
> URL: https://issues.apache.org/jira/browse/FLINK-9864
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
>
> Currently, a timestamp must be in the top-level of a possibly nested row and
> must have a certain format. We should think about making this more flexible
> to cover most of the use cases.
> A first solution could be to allow a DOT operator syntax:
> {{myfield.nested.timestamp}}
> Other cases might be:
> - The time could also be split into several field
> - Or needs to be parsed using a [date format
> syntax|https://ci.apache.org/projects/flink/flink-docs-master/dev/table/sql.html#date-format-specifier].
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