I think the answer is to run the query this way:

SELECT TABNAME FROM SYSIBMADM.ADMINTABINFO WHERE TABSCHEMA = 'LIBRAT' AND REORG_PENDING <> 'N';

Because the value of that column can be either 'Y' (for reorg pending) or 'C' (for check pending)--both of which are an operation pending (state=57007).