[jira] [Commented] (BEAM-9879) Support STRING_AGG in BeamSQL

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-9879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17340330#comment-17340330 ] 

Beam JIRA Bot commented on BEAM-9879:
-------------------------------------

This issue is assigned but has not received an update in 30 days so it has been labeled "stale-assigned". If you are still working on the issue, please give an update and remove the label. If you are no longer working on the issue, please unassign so someone else may work on it. In 7 days the issue will be automatically unassigned.

> Support STRING_AGG in BeamSQL
> -----------------------------
>
>                 Key: BEAM-9879
>                 URL: https://issues.apache.org/jira/browse/BEAM-9879
>             Project: Beam
>          Issue Type: Task
>          Components: dsl-sql, dsl-sql-zetasql
>            Reporter: Rui Wang
>            Assignee: Daniel Collins
>            Priority: P2
>              Labels: stale-assigned
>             Fix For: Not applicable
>
>
> Support STRING_AGG function in ZetaSQL dialect. (Also if Calcite has this function built-in, support it in Calcite dialect too)
> See the reference: https://cloud.google.com/bigquery/docs/reference/standard-sql/aggregate_functions#string_agg
> {code:sql}
> SELECT
>        STRING_AGG(c) str_agg_unary,
>        STRING_AGG(c, ", ") str_agg_binary,
>        STRING_AGG(d) bytes_agg_unary,
>        STRING_AGG(d, b", ") bytes_agg_binary
> {code}
> More test cases here: https://github.com/google/zetasql/blob/c55f967a5ae35b476437210c529691d8a73f5507/zetasql/compliance/testdata/aggregation_queries.test
> Examples:
> {code:sql}
> SELECT STRING_AGG(fruit) AS string_agg
> FROM UNNEST(["apple", NULL, "pear", "banana", "pear"]) AS fruit;
> +------------------------+
> | string_agg             |
> +------------------------+
> | apple,pear,banana,pear |
> +------------------------+
> {code}



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