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https://issues.apache.org/jira/browse/FLINK-32262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-32262:
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Labels: pull-request-available stale-assigned (was: pull-request-available)
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> Add MAP_ENTRIES support in SQL & Table API
> ------------------------------------------
>
> Key: FLINK-32262
> URL: https://issues.apache.org/jira/browse/FLINK-32262
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Affects Versions: 1.18.0
> Reporter: Bonnie Varghese
> Assignee: Hanyu Zheng
> Priority: Major
> Labels: pull-request-available, stale-assigned
> Fix For: 1.18.0
>
>
> Implement the {{map_entries}} method to transform a map into an array of
> key-value structs.
> Description: The current implementation of the {{map_entries}} method in the
> Flink library does not provide a way to transform a map into an array of
> key-value structs. This enhancement aims to add this functionality, allowing
> users to convert a map into a more structured format for further processing.
> Syntax:
>
> {code:java}
>
> map_entries[map: Map[K, V]] -> Array[Struct<K, V>] {code}
> Arguments:
> * {{{}map{}}}: The input map to be transformed.
> Returns: An array of key-value structs obtained from the input map. Each
> struct consists of two fields: {{key}} of type {{K}} and {{value}} of type
> {{{}V{}}}.
> Examples:
> # Transforming a map into key-value structs:
>
>
> {code:java}
> input_map = [1: 'apple', 2: 'banana', 3: 'cherry']
> map_entries[input_map]
> Output: [{'key': 1, 'value': 'apple'}, {'key': 2, 'value': 'banana'},
> {'key': 3, 'value': 'cherry'}]{code}
> # Handling an empty map:
> {code:java}
> empty_map = {}
> map_entries[empty_map]
> Output: []{code}
> See also:
> spark:[https://spark.apache.org/docs/latest/api/sql/index.html#map_entries]
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