src/main/java/org/polyjdbc/core/query/UpdateQuery.java
public UpdateQuery set(String fieldName, Object value) {
        String updatedFieldName = "update_" + fieldName;
        values.append(fieldName).append(" = :").append(updatedFieldName).append(", ");
        query.setArgument(updatedFieldName, value);
        return this;
    }
public UpdateQuery set(String fieldName, Object value) {
        String updatedFieldName = "update_" + fieldName;
        values.append(fieldName).append(" = :").append(updatedFieldName).append(", ");
        query.setArgument(updatedFieldName, value);
        return this;
    }
Set column to update. Object is automatically translated
onto matching JDBC type.

@see org.polyjdbc.core.type.ColumnTypeMapper