Fixed article search index build on oracle.
Fixed article search index build on oracle.

xhoy/otrs,xhoy/otrs,rudy500/otrs,mburggraf/otrs,mburggraf/otrs,xhoy/otrs,mburggraf/otrs,rudy500/otrs,rudy500/otrs,rudy500/otrs,xhoy/otrs,mburggraf/otrs,mburggraf/otrs,rudy500/otrs,xhoy/otrs