babelfish-for-postgresql / babelfish_extensions / 13958879091

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Improve round() function return type handling based on input arguments data types (#3567)

Make the round() function clearer on return types based on argument types and number of arguments.

Changes:
Add lookup functions for data types that are represented differently
Introduce PLpgSQL functions for each return type to reuse the existing underlying C functions
Implement logic to determine return types based on argument types and number of arguments
Add tests to ensure comprehensive coverage

Signed-off-by: RUI LUO <rluo@amazon.com>

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