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https://issues.apache.org/jira/browse/DRILL-4264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16091346#comment-16091346
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Volodymyr Vysotskyi commented on DRILL-4264:
--------------------------------------------
Yes, these statements are correct.
Drill also supports array syntax {{b\['d.e'\]}}. I used it as an example of
using field names with dots in the query.
No, I meant that we are using the same
[FieldReference|https://github.com/apache/drill/blob/90f43bff7a01eaaee6c8861137759b05367dfcf3/logical/src/main/java/org/apache/drill/common/expression/FieldReference.java#L40]
class, but in planner we are using
[checkSimpleString()|https://github.com/apache/drill/blob/90f43bff7a01eaaee6c8861137759b05367dfcf3/logical/src/main/java/org/apache/drill/common/expression/FieldReference.java#L54]
method and at the execution stage we are using constructor
[FieldReference()|https://github.com/apache/drill/blob/90f43bff7a01eaaee6c8861137759b05367dfcf3/logical/src/main/java/org/apache/drill/common/expression/FieldReference.java#L64]
that checks input string for dots.
The code does not combine the map name and nested field names. Nested field
names are stored as children of the [NameSegment
rootSegment|https://github.com/apache/drill/blob/90f43bff7a01eaaee6c8861137759b05367dfcf3/logical/src/main/java/org/apache/drill/common/expression/SchemaPath.java#L45]
in SchemaPath (it is a superclass of FieldReference).
So I propose to remove that check.
> Dots in identifier are not escaped correctly
> --------------------------------------------
>
> Key: DRILL-4264
> URL: https://issues.apache.org/jira/browse/DRILL-4264
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Codegen
> Reporter: Alex
> Assignee: Volodymyr Vysotskyi
>
> If you have some json data like this...
> {code:javascript}
> {
> "0.0.1":{
> "version":"0.0.1",
> "date_created":"2014-03-15"
> },
> "0.1.2":{
> "version":"0.1.2",
> "date_created":"2014-05-21"
> }
> }
> {code}
> ... there is no way to select any of the rows since their identifiers contain
> dots and when trying to select them, Drill throws the following error:
> Error: SYSTEM ERROR: UnsupportedOperationException: Unhandled field reference
> "0.0.1"; a field reference identifier must not have the form of a qualified
> name
> This must be fixed since there are many json data files containing dots in
> some of the keys (e.g. when specifying version numbers etc)
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