I assume the TD you referring is Teradata. According to the TDCH tutorial, "When the source table is not partitioned, the Teradata split.by.partition source plugin creates a
temporary partitioned staging table and executes an INSERT-SELECT to move data from the
source table into the stage table.". So, if you want to create multiple mappers, means you need to split the table into partitioned staging table, and thus "to enable the creation of staging table,
the split.by.partition plugin requires that the associated Teradata user has ‘create table’ and
‘create view’ privileges as well as free perm space equivalent to the size of the source table
available."
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