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https://issues.apache.org/jira/browse/SPARK-8240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696469#comment-14696469
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Cheng Hao commented on SPARK-8240:
----------------------------------
It works for me like:
{code}
sql("select concat('a', ',', key, ',', value) from src").collect()
{code}
or
{code}
df.select(concat($"a", lit(","), $"b")),
df.select(concat($"a", lit(","),$"b", lit(","),$"c"))
{code}
> string function: concat
> -----------------------
>
> Key: SPARK-8240
> URL: https://issues.apache.org/jira/browse/SPARK-8240
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 1.5.0
>
>
> concat(string|binary A, string|binary B...): string / binary
> Returns the string or bytes resulting from concatenating the strings or bytes
> passed in as parameters in order. For example, concat('foo', 'bar') results
> in 'foobar'. Note that this function can take any number of input strings.
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