Xiao Li created SPARK-18174:
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Summary: Avoid Implicit Type Cast in Arguments of Expressions
Extending String2StringExpression
Key: SPARK-18174
URL: https://issues.apache.org/jira/browse/SPARK-18174
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.1
Reporter: Xiao Li
For the expressions that extend String2StringExpression (lower, upper, ltrim,
rtrim, trim and reverse), Analyzer should not implicitly cast the arguments to
string. If users input the some data types instead of string, we should issue
an exception for this misuse.
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