In this document, all columns that contain large-object (LOB) datatypes are referred to as LOB columns, regardless of the actual datatype name used by the primary database vendor. To replicate transactions that affect a LOB column, replication must be enabled for that column.
You must enable replication for each LOB column you want to replicate, in addition to marking and enabling replication for the table that contains the LOB column.
If the value of the pdb_dflt_column_repl parameter is true, replication is enabled automatically for all LOB columns in a table at the time the table is marked.
If the value of the pdb_dflt_column_repl parameter is false, replication is not enabled automatically for any LOB columns in a table at the time the table is marked.
See “Marking and unmarking tables”.
The default value for pdb_dflt_column_repl is true,
meaning that all LOB columns will be marked for replication when
the table is marked, by default.
When a table is marked for replication and replication is enabled for that table but not for a LOB column in that table, any part of a transaction that affects the LOB column is not replicated. The portion of a transaction that affects all other nonLOB columns is replicated if the table is marked for replication and replication is enabled for the table.
