DBIx::Table::TestDataGenerator::Increment - incrementing constrained columns
Handles incrementing columns constrained by uniqueness conditions.
Returns an anonymous function for incrementing the values of a column of data type $type starting at a value to be determined by the current "maximum" $max. In case of a numeric data type, $max will be just the current maximum, but in case of strings, we have decided to pass the maximum length since there is no natural ordering available. E.g. Perl using per default another order than the lexicographic order employed by Oracle. In our default implementations, for string data types we add values for the current column at 'A...A0', where A is repeated $max times and increase the appended integer in each step. This should be made more flexible in future versions.
We must decide which of the column values of a record to be added will be changed in case of a uniqueness constraint. This method returns a reference to an array listing the supported data types. The order of the data types defines which column in such a unique constraint will get preference over others based on its data type.
Jose Diaz Seng,
<josediazseng at gmx.de>
Copyright (C) 2012-2013, Jose Diaz Seng.
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