A big integer (BIGINT) is an 8-byte integer SQL data type.
01 bigint1 PIC S9(18) COMP-3. 01 bigint2 PIC S9(18) COMP-5.
01 bigint3 PIC X(8) COMP-5. 01 bigint4 PIC X(8) COMP-X.In non-COBOL applications, a BIGINT data type can hold a value larger than PIC S9(18). If you define your host variable for a COBOL data time with a value larger than S9(18), your data might be truncated.
01 bigint5 binary-double.