ps_thread_id() is deprecated,
and subject to removal in a future MySQL version.
Applications that use it should be migrated to use the
built-in PS_THREAD_ID() and
PS_CURRENT_THREAD_ID()
functions instead. See
Section 14.21, “Performance Schema Functions”
Returns the Performance Schema thread ID assigned to a given
connection ID, or the thread ID for the current connection if
the connection ID is NULL.
in_connection_id BIGINT UNSIGNED: The ID of the connection for which to return the thread ID. This is a value of the type given in thePROCESSLIST_IDcolumn of the Performance Schemathreadstable or theIdcolumn ofSHOW PROCESSLISToutput.