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Posted to issues@calcite.apache.org by "Hongze Zhang (JIRA)" <ji...@apache.org> on 2019/03/10 05:14:00 UTC
[jira] [Updated] (CALCITE-2872) Support for specifying encoding in
JSON representation clause
[ https://issues.apache.org/jira/browse/CALCITE-2872?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hongze Zhang updated CALCITE-2872:
----------------------------------
Description:
Syntax of {{JSON representation}} clause:
{code:java}
<JSON representation> ::= JSON [ ENCODING { UTF8 | UTF16 | UTF32 } ] | <implementation-defined JSON representation option>
{code}
From ISO/IEC 9075-6[1]:
{quote}
A <JSON value expression> may have an optional <JSON input clause>. This indicates that the values expression should be parsed as JSON. The standardized option is FORMAT JSON; implementations may also support syntax such as FORMAT AVRO or FORMAT BSON. When using the <JSON input clause>, the <value expression> may be either a character string or a binary string.
{quote}
Currently we have already added base syntax support of UTF8/UTF16/UTF32 encoded JSON to parser[2]. However the flags won't appear in parse tree for now.
[1] http://standards.iso.org/ittf/PubliclyAvailableStandards/c065143_ISO_IEC_TR_19075-5_2016.zip
[2] https://github.com/apache/calcite/blob/master/core/src/main/codegen/templates/Parser.jj#L4875
> Support for specifying encoding in JSON representation clause
> -------------------------------------------------------------
>
> Key: CALCITE-2872
> URL: https://issues.apache.org/jira/browse/CALCITE-2872
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Hongze Zhang
> Priority: Major
>
> Syntax of {{JSON representation}} clause:
> {code:java}
> <JSON representation> ::= JSON [ ENCODING { UTF8 | UTF16 | UTF32 } ] | <implementation-defined JSON representation option>
> {code}
> From ISO/IEC 9075-6[1]:
> {quote}
> A <JSON value expression> may have an optional <JSON input clause>. This indicates that the values expression should be parsed as JSON. The standardized option is FORMAT JSON; implementations may also support syntax such as FORMAT AVRO or FORMAT BSON. When using the <JSON input clause>, the <value expression> may be either a character string or a binary string.
> {quote}
> Currently we have already added base syntax support of UTF8/UTF16/UTF32 encoded JSON to parser[2]. However the flags won't appear in parse tree for now.
> [1] http://standards.iso.org/ittf/PubliclyAvailableStandards/c065143_ISO_IEC_TR_19075-5_2016.zip
> [2] https://github.com/apache/calcite/blob/master/core/src/main/codegen/templates/Parser.jj#L4875
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