Alvaro Herrera a3540b0f65 Improve our #include situation by moving pointer types away from the
corresponding struct definitions.  This allows other headers to avoid including
certain highly-loaded headers such as rel.h and relscan.h, instead using just
relcache.h, heapam.h or genam.h, which are more lightweight and thus cause less
unnecessary dependencies.
2008-06-19 00:46:06 +00:00
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