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Posted to issues@calcite.apache.org by "Julian Hyde (Jira)" <ji...@apache.org> on 2020/06/24 00:06:00 UTC
[jira] [Assigned] (CALCITE-4087) Hoist, a utility to replace
literals in a SQL string with placeholders
[ https://issues.apache.org/jira/browse/CALCITE-4087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Julian Hyde reassigned CALCITE-4087:
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Assignee: Julian Hyde
> Hoist, a utility to replace literals in a SQL string with placeholders
> ----------------------------------------------------------------------
>
> Key: CALCITE-4087
> URL: https://issues.apache.org/jira/browse/CALCITE-4087
> Project: Calcite
> Issue Type: New Feature
> Components: babel
> Affects Versions: 1.23.0
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
>
> Add "Hoist", a utility to replace literals in a SQL string with placeholders.
> By default it uses Calcite's parser, but you can configure to use different quoting, casing, and also to use a different parser such as Babel for other dialects of SQL.
> It generates a data structure, {{Hoisted}}, that contains a map of where the literals occur within the SQL string. The Hoisted.substitute method generates an alternative SQL string, replacing the literals with a custom string.
> It does not call {{SqlNode.unparse}}, and therefore does not lose any of the original formatting.
> For more examples, see tests added to {{SqlParserTest}} and {{BabelParserTest}}.
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