Equivalent function not found for ERROR_PROCEDURE(),ERROR_LINE(),ERROR_MESSAGE().

Hi,
I am new to postgresql and presently we are migrating from sql server to postgresql.
We have certain functions in sql server such as ERROR_PROCEDURE(),ERROR_LINE(),ERROR_MESSAGE(). I am unable to find any equivalent
functions in postgresql. Kindly help me. Thanks in advance. Its urgent.

Thanks and regards,
Sayan Majumder.

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