07ARB opened a new pull request #27024: [SPARK-29854]lpad and rpad built in function should throw Error or Exception for invalid length value URL: https://github.com/apache/spark/pull/27024 ### What changes were proposed in this pull request? lpad and rpad built in function should throw Error or Exception for invalid length value Instead of empty string. ### Why are the changes needed? We should throw Error or Exception message, if user trying to perform LPAD/RPAD operation using invalid argument. ``` SELECT lpad('hi', 'ankit', '?') => "" <previous behaviours> SELECT lpad('hi', 'ankit', '?') => "Error in query: Invalid argument, TypeCheckFailure(argument 2 requires int type, however, ''ankit'' is of string type.);" <After this PR> SELECT rpad('hi', 'raj', '?') => "" <previous behaviours> SELECT lpad('hi', 'raj', '?') => "Error in query: Invalid argument, TypeCheckFailure(argument 2 requires int type, however, ''ankit'' is of string type.);" <After this PR> ``` ### Does this PR introduce any user-facing change? YES     ### How was this patch tested? Old unit tests correct as per this jira.
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