Query TO list all purchase document types IN oracle apps

SELECT   haou.NAME operating_unit,
         flv1.meaning
                  || ' '
                  || flv2.meaning                                        document_type,
         pdtav.type_name                                                 NAME,
         xtv1.template_name                                              document_types_layout,
         xtv2.template_name                                              contract_terms_layout,
         Decode (pdtav.can_preparer_approve_flag, 'Y', 'Yes', 'N', 'No') can_preparer_approve,
         Initcap (pdtav.security_level_code)                             security_level,
         pdtav.document_type_code,
         pdtav.document_subtype
FROM     hr_all_organization_units haou,
         po_document_types_all_vl pdtav,
         fnd_lookup_values flv1,
         fnd_lookup_values flv2,
         xdo_templates_vl xtv1,
         xdo_templates_vl xtv2
WHERE    1 = 1
AND      haou.organization_id = pdtav.org_id
AND      pdtav.document_type_code = flv1.lookup_code(+)
AND      pdtav.document_subtype = flv2.lookup_code(+)
AND      flv1.lookup_type(+) = 'DOCUMENT TYPE'
AND      flv2.lookup_type(+) = decode (pdtav.document_type_code, 'REQUISITION', 'REQUISITION TYPE', 'RFQ', 'RFQ SUBTYPE', 'QUOTATION', 'QUOTATION SUBTYPE', 'DOCUMENT SUBTYPE')
AND      flv1.language(+) = userenv ('lang')
AND      flv2.language(+) = userenv ('lang')
AND      flv1.view_application_id(+) = 201
AND      flv2.view_application_id(+) = 201
AND      flv1.security_group_id(+) = 0
AND      flv2.security_group_id(+) = 0
AND      pdtav.document_template_code = xtv1.template_code(+)
AND      pdtav.contract_template_code = xtv2.template_code(+)
ORDER BY haou.NAME ,
         pdtav.document_type_code ,
         pdtav.type_name