How to truncate a partition in owb

Question

I wonder how can i achieve truncating a partition before loading into this target table. I found this pre-mapping prcess where we have this option of truncating a table, but how can i just truncate a partition within a table in a mapping? please advice.
~Prabha

Answer 1

As per Detlef's suggestion, here's the basics that you can embedd in a function/procedure. Accepts 3 parameters in_table_name, in_subpartition_name and in_partition_name. You can also enhance ALTER statements to REUSE/DROP STORAGE if required.
v_sql VARCHAR2(250) DEFAULT NULL;
BEGIN
IF in_subpartition_name IS NOT NULL THEN
v_sql := 'ALTER TABLE '||in_table_name||' TRUNCATE SUBPARTITION '||in_subpartition_name;
ELSIF in_partition_name IS NOT NULL THEN
v_sql := 'ALTER TABLE '||in_table_name||' TRUNCATE PARTITION '||in_partition_name;
ELSE
RAISE no_data_found;
END IF;
EXECUTE IMMEDIATE v_sql;