Shell Programming and Scripting

i=0
len=${#arr[@]}
echo $len

shopt -s extglob

pattern=*[0-9]*.*
pattern1=*[0-9]*_[0-9]*.*
pattern2=*[a-zA-z0-9]*.*
pattern3=File_[0-9]*_[0-9]*.csv
pattern4=File_[a-zA-Z]*_[a-zA-Z]*.csv
pattern5=File_[a-zA-Z0-9]*_[a-zA-Z0-9]*.csv
pattern6=File_[0-9]*[a-zA-Z]*.csv

while [ $len -gt $i ]
do
  case ${arr[$i]} in
  $pattern) echo "pattern %N% match" ;;
  esac
  case ${arr[$i]} in
  $pattern1) echo "pattern %N%_%N% match" ;;
  esac
  case ${arr[$i]} in
  $pattern2) echo "pattern %x% match" ;;
  esac

Input=($( sqlplus -s rte/rtet1@him60t1 << EOF
set heading off
select FILE_NAME_DTTM FROM prd_frg_file_jrnl where FILE_KEY > $val;
EOF
))
echo $Input


i=0
len=${#arr[@]}
echo $len

for i in "${arr[@]}"
do      printf "Processing %s:\n" "$i"
        if [[ "$i" =~ [a-bA-Z0-9][0-9]+.[a-z] ]]
        then    echo '%N% FILE MASK PASS'
        elif [[ "$i" =~ [a-zA-Z0-9][0-9]+_[0-9]+.[a-z] ]]
        then    echo '%N%_%N% FILE MASK PASS'
        elif [[ "$i" =~ [a-bA-Z0-9][0-9]+.[a-z] ]] && [[ "$Input" != "no row selected" ]]
        then    echo '%SE% FILE MASK PASS'
        elif [[ "$i" =~ [a-bA-Z0-9][a-zA-Z]+.[a-z] ]]
        then    echo '%C% FILE MASK PASS'

        else    echo 'No match'
        fi

done