The thread about tablecmds.c being too large for some code inspection tooling got me thinking about ways to improve the second worst offender: pg_dump.c.
Those investigations of mine haven't yet revealed a way to split the file that I find effective, let alone helpful. However, it has shown me a few patterns within pg_dump.c that I'm proposing to change.
Of the current 84 calls to the convenience routine ExecuteSqlQuery(), 83 of them are regular queries which expect a result of PGRES_TUPLES_OK. The other one expects PGRES_COPY_OUT. So it seems worthwhile to remove the parameter entirely and assume the caller wants PGRES_TUPLES_OK. For the one exception, ExecuteSqlCopy() is created, though one could argue that we might just do without the convenience routine altogether. Patch attached.