Stmt_text is null

Hi,

i can get statement text from table function SNAP_GET_STMT , i am getting null value in stmt_text . Can any one clarify me why am always getting null value in stmt_text column.

i am running this query in db2 v10

select AGENT_ID,DB_NAME,STMT_USR_CPU_TIME_MS,STMT_SYS_CPU _TIME_MS,STMT_TEXT from TABLE(SNAP_GET_STMT('',-1))

AGENT_ID DB_NAME STMT_SYS_CPU_TIME STMT_TEXT
26776 SAMPLE 0 (null)
26795 SAMPLE 0 (null)
26775 SAMPLE 0 (null)


thanks & regards
selva