Represents the column mappings in a schema. Column mappings are used to map field names to an actual field in a table and to the alias used in the result of a query.
Returns the name of the field.
Returns the name of the field in the (schema) data table.
Represents the field name in the sql result, this generally matches
tableField, but for complex queries it could be an alias in the sql query.
Represents field name in the table, this is what the field is actually called in the table.