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https://issues.apache.org/jira/browse/FLINK-8038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16255273#comment-16255273
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ASF GitHub Bot commented on FLINK-8038:
---------------------------------------
Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/5015#discussion_r151406004
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionParser.scala
---
@@ -141,6 +142,7 @@ object ExpressionParser extends JavaTokenParsers with
PackratParsers {
lazy val dataType: PackratParser[TypeInformation[_]] =
PRIMITIVE_ARRAY ~ "(" ~> dataType <~ ")" ^^ { ct =>
Types.PRIMITIVE_ARRAY(ct) } |
OBJECT_ARRAY ~ "(" ~> dataType <~ ")" ^^ { ct =>
Types.OBJECT_ARRAY(ct) } |
+ MAP ~ "(" ~> dataType ~ dataType <~ ")" ^^ { tt => Types.MAP(tt._1,
tt._2)} |
--- End diff --
Comma is missing.
> Support MAP value constructor
> -----------------------------
>
> Key: FLINK-8038
> URL: https://issues.apache.org/jira/browse/FLINK-8038
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Rong Rong
> Assignee: Rong Rong
>
> Similar to https://issues.apache.org/jira/browse/FLINK-4554
> We want to support Map value constructor which is supported by Calcite:
> https://calcite.apache.org/docs/reference.html#value-constructors
> {code:sql}
> SELECT
> MAP['key1', f0, 'key2', f1] AS stringKeyedMap,
> MAP['key', 'value'] AS literalMap,
> MAP[f0, f1] AS fieldMap
> FROM
> table
> {code}
> This should enable users to construct MapTypeInfo, one of the CompositeType.
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