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https://issues.apache.org/jira/browse/CALCITE-7866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18128288#comment-18128288
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Mihai Budiu commented on CALCITE-7866:
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I have a fix, but it will conflict with CALCITE-7865 so I will wait for that
one to be merged first.
> CASTS from string values accept Java idioms which are not legal in SQL
> ----------------------------------------------------------------------
>
> Key: CALCITE-7866
> URL: https://issues.apache.org/jira/browse/CALCITE-7866
> Project: Calcite
> Issue Type: Bug
> Reporter: Mihai Budiu
> Priority: Minor
>
> The Calcite runtime uses Java to parse values when converting strings to
> other types. As a result, the runtime accepts Java constructs which are not
> legal in SQL. Examples:
>
> ||Cast||String||Java rule that accepts it||Constant||
> |DOUBLE, REAL|{{{}'1.5d'{}}}, {{'1.5f'}}|type suffix on a Java number|1.5|
> |DOUBLE, REAL|{{'0x1p3'}}|hexadecimal floating-point number|8.0|
> |INT types|{{'٧'}} (U+0667, Arabic-Indic 7)|{{Character.digit}} accepts any
> Unicode digit|7|
> |BOOLEAN|{{'falſe'}} (U+017F, long s)|{{equalsIgnoreCase}} upper-cases {{ſ}}
> to {{S}}|FALSE|
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