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https://issues.apache.org/jira/browse/AVRO-1797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15142006#comment-15142006
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Huaisi Xu commented on AVRO-1797:
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I should double escape \.. But '\\u0000' is still a problem. For integer
786671, bytes code is \u000c\u0000\u00ef, and the middle \u0000 is ignored by
the json parser.
> Schema parser should not expect ctrl-char (ASCII: 0-31) to be escaped in
> default value for bytes
> ------------------------------------------------------------------------------------------------
>
> Key: AVRO-1797
> URL: https://issues.apache.org/jira/browse/AVRO-1797
> Project: Avro
> Issue Type: Bug
> Components: c, java
> Affects Versions: 1.7.4
> Environment: Hive, Impala
> Reporter: Huaisi Xu
> Priority: Blocker
>
> In https://avro.apache.org/docs/1.7.7/spec.html#schema_complex, "Default
> values for bytes and fixed fields are JSON strings, where Unicode code points
> 0-255 are mapped to unsigned 8-bit byte values 0-255.". The example provided
> is: bytes || string || "\u00FF".
> However, if I try to create a table schema with default bytes value for a
> decimal field to be i.e. "\u0031", I will have "Illegal unquoted character
> ((CTRL-CHAR, code 31)): has to be escaped using backslash to be included in
> string value.". Anything less than 32 fails.
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