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https://issues.apache.org/jira/browse/FLINK-34898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17829349#comment-17829349
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Chloe He commented on FLINK-34898:
----------------------------------
I also can't wrap this in an ARRAY like so
{code:java}
SELECT * FROM (VALUES
ARRAY[CAST((1, 2) as ROW<a INT, b INT>)]
); {code}
This raises
{code:java}
java.lang.UnsupportedOperationException: class
org.apache.calcite.sql.SqlBasicCall: ROW('a', 1) {code}
> Cannot create named STRUCT with a single field
> ----------------------------------------------
>
> Key: FLINK-34898
> URL: https://issues.apache.org/jira/browse/FLINK-34898
> Project: Flink
> Issue Type: Bug
> Reporter: Chloe He
> Priority: Major
>
> I'm trying to create named structs using Flink SQL and I found a previous
> ticket https://issues.apache.org/jira/browse/FLINK-9161 that mentions the use
> of the following syntax:
> {code:java}
> SELECT CAST(('a', 1) as ROW<a STRING, b INT>) AS row1;
> {code}
> However, my named struct has a single field and effectively it should look
> something like `\{"a": 1}`. I can't seem to be able to find a way to
> construct this. I have experimented with a few different syntax and it either
> throws parsing error or casting error:
> {code:java}
> Cast function cannot convert value of type INTEGER to type
> RecordType(VARCHAR(2147483647) a) {code}
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