Xiao Li created SPARK-20303:
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Summary: Replace createTempFunction by registerFunction
Key: SPARK-20303
URL: https://issues.apache.org/jira/browse/SPARK-20303
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.2.0
Reporter: Xiao Li
Assignee: Xiao Li
Session catalog API `createTempFunction` is being used by Hive build-in
functions, persistent functions, and temporary functions. Thus, the name is
confusing. This PR is to replace it by `registerFunction`. Also we can move
construction of `FunctionBuilder` and `ExpressionInfo` into the new
`registerFunction`, instead of duplicating the logics everywhere.
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