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https://issues.apache.org/jira/browse/CALCITE-1066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15172960#comment-15172960
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Julian Hyde commented on CALCITE-1066:
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Also consider:
* REPLACE (see CALCITE-420)
* TRANSLATE (see
https://mail-archives.apache.org/mod_mbox/calcite-dev/201602.mbox/%3CCAC1ju52F_MKNFbcPk0b-k9pmv7O%2Bhw6nENqDyk%3DSspTT_GJmnw%40mail.gmail.com%3E)
> Add an extension operator table with Oracle-specific operators
> --------------------------------------------------------------
>
> Key: CALCITE-1066
> URL: https://issues.apache.org/jira/browse/CALCITE-1066
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Labels: newbie
>
> Add a mechanism to allow connections to use additional operator tables, the
> first of which will be one with Oracle-specific functions. We don't aim to do
> every function.
> Important functions:
> * DECODE
> * NVL
> * RTRIM
> * LTRIM
> * LPAD
> * RPAD
> * TO_CHAR
> * TO_NUMBER
> * TO_DATE
> * TRUNC
> * SUBSTR (different from standard SUBSTRING)
> * INSTR
> Easy:
> * PI
> * DEGREES
> * RADIANS
> * SIGN
> * GREATEST
> * LEAST
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