./main.py will process all templates from path2templates and generate directories tree with SQL scripts into path2result

There are all templates directories which should be considered during processing in templates_dirs

Examples:

Check please tests folder. There are two bad examples and good one

The point is you should construct main query template by including executable sub-templates which are preparing temp tables for main template.

Such executable sub-templates are having input parameters as variables and they are outputting into temporary table which can later be used by main template.

First it is very clear approach. Second every such sub-template is testable independently! So testability of such system is very high. Check Good Example 1.

Bad examples are using in the worst scenario include for part of WHERE. Check Bad Example 1. In the other example parent/child inheritance. Check Bad Example 2.

Both are obscure, difficult to maintain. And used templates can not be tested!