liuxian created SPARK-20403:
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Summary: 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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