Loop se a instrução find não estiver funcionando

Question

Eu tenho esse loop "case" no final de um script sh que deve funcionar como mais limpo, mas não, abaixo do código que estou usando

TARGET_DMPDIR='sqlplus -s "/as sysdba" <<EOF
    SET PAGESIZE 0
    SET LINESIZE 200
    SET HEADING OFF
    SET FEEDBACK OFF
    SET TRIMSPOOL ON
    SET FEED OFF
    SET VERIFY OFF
    select directory_path from dba_directories where directory_name='DATA_PUMP_DIR';
    exit;
EOF'
DATE='date +"%Y%m%d-%H%M%S"' 
COMPRESSED_EXPORTFILE="${ORACLE_SID}_${DATE}.dmp" (before the export)
COMPRESSED_EXPORTFILE=${COMPRESSED_EXPORTFILE}.Z (after export)



    case "$ORACLE_SID" in
        LIVE) t=6 ;;
        *)    t=1 ;;
    esac

    find "$TARGET_DMPDIR" -type f '(' -name "$COMPRESSED_EXPORTFILE" -o -name "exp_*_$ORACLE_SID.log" ')' \
        -mtime +"$t" -print -exec rm {} \;

Isso é o que eu tenho no meu TARGET_DMPDIR:

-rw-r-----   1 oracle   dba       814252 Mar  7 21:08 LIVE_20180307-210159.dmp.Z
-rw-r-----   1 oracle   dba       819516 Mar  8 21:09 LIVE_20180308-210202.dmp.Z
-rw-r-----   1 oracle   dba       814493 Mar  9 21:08 LIVE_20180309-210158.dmp.Z
-rw-r--r--   1 oracle   dba         3167 Mar  9 21:08 exp_20180309_LIVE.log
-rw-r-----   1 oracle   dba       820402 Mar 10 21:08 LIVE_20180310-210157.dmp.Z
-rw-r--r--   1 oracle   dba         3169 Mar 10 21:08 exp_20180310_LIVE.log
-rw-r-----   1 oracle   dba       822035 Mar 11 21:08 LIVE_20180311-210158.dmp.Z
-rw-r--r--   1 oracle   dba         3169 Mar 11 21:08 exp_20180311_LIVE.log
-rw-r-----   1 oracle   dba       814219 Mar 12 21:08 LIVE_20180312-210157.dmp.Z
-rw-r--r--   1 oracle   dba         3169 Mar 12 21:08 exp_20180312_LIVE.log
-rw-r-----   1 oracle   dba      21725862211 Mar 14 00:13 LIVE_20180313-212553.dmp.Z
-rw-r--r--   1 oracle   dba       172259 Mar 14 00:13 exp_20180313_LIVE.log
-rw-r-----   1 oracle   dba      21751392439 Mar 15 00:13 LIVE_20180314-212558.dmp.Z
-rw-r--r--   1 oracle   dba       172259 Mar 15 00:13 exp_20180314_LIVE.log
-rw-r-----   1 oracle   dba      21773328817 Mar 16 00:14 LIVE_20180315-212518.dmp.Z
-rw-r--r--   1 oracle   dba       172259 Mar 16 00:14 exp_20180315_LIVE.log