Regular hand-authored DDL/DML — CREATE/ALTER TABLE, indexes, constraints, plain INSERT/UPDATE. Transpilable.
Banner-marked CodeGen SQL objects — discard on PG and regenerate natively.
mj-sync metadata seed — session header or @x_<hash> vars. Re-seed via mj sync push.
Real schema DDL — CREATE/ALTER TABLE, indexes, constraints. Transpiled.
Data DML — INSERT/UPDATE/DELETE. Transpiled when it isn't part of an mj-sync seed.
Hand-written procedural SQL — CREATE [OR ALTER] PROCEDURE|FUNCTION|TRIGGER authored by a dev. Needs a human PG version.
What a contiguous region of a migration was produced by / consists of.