A hash with column symbol keys and default values. Instance’s values are merged into this hash before creating to reduce the number of free columns (columns that may or may not be present in the INSERT statement), as the number of prepared statements that can be created is 2^N (where N is the number of free columns).
Freeze the prepared statements column defaults when freezing the model class.
# File lib/sequel/plugins/prepared_statements_safe.rb, line 42 def freeze @prepared_statements_column_defaults.freeze if @prepared_statements_column_defaults super end