Oracle 18c

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CREATE TYPE demo_tbl AS TABLE OF INT;
CREATE OR REPLACE TYPE "demo2_tbl" AS TABLE OF INT;
CREATE OR REPLACE TYPE Test AS OBJECT (
  demo demo_tbl,
  demo2 demo2_tbl   
)
ORA-24344: success with compilation error

SELECT * FROM USER_ERRORS;


NAME
TYPE
SEQUENCE
LINE
POSITION
TEXT
ATTRIBUTE
MESSAGE_NUMBER


TEST
TYPE
1
3
9
PLS-00201: identifier 'DEMO2_TBL' must be declared
ERROR
201

TEST
TYPE
2
0
0
PL/SQL: Compilation unit analysis terminated
ERROR
0


CREATE OR REPLACE TYPE Test AS OBJECT (
  demo  demo_tbl,
  demo2 "demo2_tbl"
)

NAME	TYPE	SEQUENCE	LINE	POSITION	TEXT	ATTRIBUTE	MESSAGE_NUMBER
TEST	TYPE	1	3	9	PLS-00201: identifier 'DEMO2_TBL' must be declared	ERROR	201
TEST	TYPE	2	0	0	PL/SQL: Compilation unit analysis terminated	ERROR	0