Replication Server 15.0 adds support for the bigint datatype, which is a fixed-width, 8-byte datatype.
Like int, smallint, and tinyint, bigint is a signed integer datatype. bigint can hold whole numbers between –263 and +(263 – 1).
To fully support bigint, the primary and replicate Replication Server must have a site version of 15.0, and the LTL version must be 700. If the LTL version is less than 700 at connect-source time, RepAgent converts bigint columns to numeric.