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PG_BACKEND_PID - Amazon Redshift
SyntaxReturn typeExample
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PG_BACKEND_PID

Returns the process ID (PID) of the server process handling the current session.

Note

The PID is not globally unique. It can be reused over time.

Syntax

pg_backend_pid()

Return type

Returns an integer.

Example

You can correlate PG_BACKEND_PID with log tables to retrieve information for the current session. For example, the following query returns the query ID and a portion of the query text for queries completed in the current session.

select query, substring(text,1,40)
from stl_querytext
where pid =  PG_BACKEND_PID()
order by query desc;

 query |                substring
-------+------------------------------------------
 14831 | select query, substring(text,1,40) from
 14827 | select query, substring(path,0,80) as pa
 14826 | copy category from 's3://dw-tickit/manif
 14825 | Count rows in target table
 14824 | unload ('select * from category') to 's3
(5 rows)

You can correlate PG_BACKEND_PID with the pid column in the following log tables (exceptions are noted in parentheses):