ocr: Row 1A. INDEX RANGE SCAN of the City index Row (Houston') 2A: AND-EQUAL BA.TABLE ACCESS BY Row ROWID of 18. INDEX RANGE SCAN COMPANY ofthe Stateindex Row 1C. INDEX RANGE SCAN ofthe City index Row (Austin) 2B. AND-EQUAL 3B.TABLE ACCESS BY Row ROWID of 1D.l INDEX RANGESCAN COMPANY of the State index Row 1E. INDEX RANGE SCAN of the City index Row (Dallas') 2C. AND-EQUAL 3C.TABLE Row ROWID ACCESS of BY 1F INDEX RANGE SCAN COMPANY ofthe State index Row 4. CONCAIENATION Output to user Figure 13: The CONCATENATION operatron execution path.