Oracle to PostGre

Hi,

App is moving to Postgre from Oracel . After migrating the store procedure
is throwing an error with collection type.

*Oracle :*

create or replace PROCEDURE "PROC1"
(

, REQ_CURR_CODE IN VARCHAR2
, IS_VALID OUT VARCHAR2
, ERROR_MSG OUT VARCHAR2
) AS

TYPE INV_LINES_RT IS RECORD(
VENDOR_NUM AP.CREATURE_TXN_LINE_ITEMS.VENDOR_NUM%TYPE,
VENDOR_SITE_CODE AP.CREATURE_TXN_LINE_ITEMS.VENDOR_SITE_CODE%TYPE,
INVOICE_NUM AP.CREATURE_TXN_LINE_ITEMS.INVOICE_NUM%TYPE,
TXN_CNT NUMBER
);
TYPE INV_LINES_T IS TABLE OF INV_LINES_RT;
L_INV_LINES INV_LINES_T;
IS_MULTI_VENDOR
FINO_APRVL_BUS_CHANN_DEFAULTS.MULTI_VENDOR_REQ_ALLOWED%TYPE;
BUS_CHANNEL_RECORD FINO_APRVL_BUS_CHANN_DEFAULTS%ROWTYPE;
CAL_APRVL_AMT_BY_TOTAL_AMT
FINO_APRVL_BUS_CHANN_DEFAULTS.CAL_APR_AMT_BY_INV%TYPE;

Postgre :

create or replace FUNCTION AP.VALIDATE_CRTR_LINE_ITEMS
(
REQ_CURR_CODE IN VARCHAR,
IS_VALID OUT VARCHAR,
ERROR_MSG OUT VARCHAR
) AS $$

DECLARE

INV_LINES_T ap.validate_crtr_line_items$inv_lines_rt ARRAY;
L_INV_LINES INV_LINES_T%TYPE;
L_INV_LINES$temporary_record ap.validate_crtr_line_items$inv_lines_rt;
IS_MULTI_VENDOR
AP.FINO_APRVL_BUS_CHANN_DEFAULTS.MULTI_VENDOR_REQ_ALLOWED%TYPE;
BUS_CHANNEL_RECORD ap.fino_aprvl_bus_chann_defaults%ROWTYPE;
CAL_APRVL_AMT_BY_TOTAL_AMT
AP.FINO_APRVL_BUS_CHANN_DEFAULTS.CAL_APR_AMT_BY_INV%TYPE;

but it's throwing an error as : 0 SQLState: 42P01 Message: ERROR: relation
"l_inv_lines" does not exist
--
Thanks & Regards,
Brahmeswara Rao J.