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https://issues.apache.org/jira/browse/CALCITE-972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15014296#comment-15014296
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Kevin Liew commented on CALCITE-972:
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That sounds good. We don't require scientific notation, and any library that
can interpret scientific notation should also be able to read a simple decimal
string.
Your proposed format should be compatible with all clients.
> Decimal data sent by Avatica cannot be interpreted by some clients
> ------------------------------------------------------------------
>
> Key: CALCITE-972
> URL: https://issues.apache.org/jira/browse/CALCITE-972
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Affects Versions: 1.5.0
> Reporter: Kevin Liew
> Assignee: Julian Hyde
> Labels: avatica, calcite, decimal, double, wireprotocol
>
> JSON specifies a 'number' data type which does not differentiate between
> integer and floating-point values. The encoding for JSON numbers is
> implementation-specific. Libraries such as RapidJSON can treat all
> non-integer values as 'double' while still being compliant with JSON
> specifications. As a result, decimal values sent by Phoenix will lose
> precision on the client side.
> Decimal data should be sent as a string. If it is sent as a number, we cannot
> be expect that all JSON-spec compliant library will handle it properly.
> ie. Phoenix sends a decimal as a JSON number, but Rapidjson can only extract
> JSON numbers as integer or double because the C++ language does not have
> native decimal support.
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