Forgive me if this sounds pedantic, but how do you distinguish between DDL and SQL scripts? I only ask because I use a single directory (sql, although I like ddl as well) for this. Aren't they the same thing?

I also wonder if you have a sibling dml directory which has the definitions for a SQL phrasebook. To be honest, that idea only just occurred to me, but it does seems attractive. Something like:

+--sql
   +--dml  # database setup scripts and definitions here.
   +--ddl  # data files with phrasebook definitions here.
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