TableAM/PageInspect: Currently the function tries to inspect all storage options

[Eulerizeit]

if (blkno >= RelationGetNumberOfBlocksInFork(rel, forknum))
                ereport(ERROR,
                                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
                                 errmsg("block number %u is out of range for relation \"%s\"",
                                                blkno, RelationGetRelationName(rel))));
        /* Initialize buffer to copy to */
        raw_page = (bytea *) palloc(BLCKSZ + VARHDRSZ);
        SET_VARSIZE(raw_page, BLCKSZ + VARHDRSZ);
        raw_page_data = VARDATA(raw_page);

Page inspect uses a generic interface but then makes assumptions about the storage for example getRowPage() using these where they don't make sense causes a crash.

This is for debugging, what the 'user' is interested in is the bit format.

Perhaps rather than extending page inspect we might want to create something separate.