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https://issues.apache.org/jira/browse/SPARK-20403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15976224#comment-15976224
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Apache Spark commented on SPARK-20403:
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User '10110346' has created a pull request for this issue:
https://github.com/apache/spark/pull/17698
> It is wrong to the instructions of some functions,such as
> boolean，tinyint，smallint，int，bigint，float，double，decimal，date，timestamp，binary，string
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-20403
> URL: https://issues.apache.org/jira/browse/SPARK-20403
> Project: Spark
> Issue Type: Bug
> Components: Documentation, SQL
> Affects Versions: 2.1.0
> Reporter: liuxian
> Priority: Trivial
>
> spark-sql>desc function boolean;
> Function: boolean
> Class: org.apache.spark.sql.catalyst.expressions.Cast
> Usage: boolean(expr AS type) - Casts the value `expr` to the target data type
> `type`.
> spark-sql>desc function int;
> Function: int
> Class: org.apache.spark.sql.catalyst.expressions.Cast
> Usage: int(expr AS type) - Casts the value `expr` to the target data type
> `type`.
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