Capturing just slow queries

[Tiffany Thang]

Hi,
log_min_duration_statement captures all statements including DMLs that have
exceeded the threshold. Is there a way in PG 12 to capture just select
statements excluding all DMLs and DDLs? In my environment, it's
acceptable for DMLs and DDLs to cross the threshold and we are more
interested in capturing poor performing select statements.

Thanks.

Tiff