Table to load dynamically using sqlloader.

Question

how to specify which table to load dynamically using sqlloader. We are using sqlldr in a script as given below...
sqlldr user/pass control=/control/loader.ctl log=/log/logger.log bad=/bad/badrec.bad data=/data/d1.txt

Answer 1

Hello, you'd need to build the necessary control files through a shell script, here is an example:
# Write sqlplus commands to control_file.sql
echo "set head off
set feedback off
set pagesize 0
set termout off" > control_file.sql
# read table and column list from table.dat
more table.dat |awk '{print $1}' |
while read TAB
do
        echo "Table ${TAB}"
        read COLUMNS
        STR="nothing"
        if test "$TABLE_LIST" = "empty"
        then
                TABLE_LIST="'$TAB'"
        else
                TABLE_LIST="$TABLE_LIST,'$TAB'"
        fi
# construct select to load data - creating SQL*Loader control files
        echo "set head off\n
        set feedback off\n
        set pagesize 0\n
        select column_name||' '||
        decode(data_type,'VARCHAR2',' char ('||DATA_LENGTH||')',
        'CHAR',' char ('||DATA_LENGTH||')','DATE',' date (20) \"DD-MON-YYYY HH24:MI:SS\"','')
        from user_tab_columns
        where table_name ='$TAB'
        order by 1;\n" | $ORACLE_HOME/bin/sqlplus -s $USR | awk '{print $1" "$2" "$3" "$4" "$5}' |
# read the columns in and concatenate them together to form the control file select
        while read COLUM
        do
                if test "$STR" = "nothing"
                then
                        STR="\nspool $TAB.CTL\nselect 'LOAD DATA\nINFILE \"$TAB.DMP\"\nBADFILE \"$TAB.BAD\""
                        STR="$STR\nDISCARDFILE \"$TAB.DIS\"\nDISCARDMAX 99\nTRUNCATE"
                        STR="$STR\nCONTINUEIF LAST != \"$FIELD_ENCLOSURE2\"\nINTO TABLE $TAB"
                        #STR="$STR INTO TABLE $TAB"
                        STR="$STR\nFIELDS TERMINATED BY \"$FIELD_DELIMITER\""
                        STR="$STR ENCLOSED BY \"$FIELD_ENCLOSURE\" AND \"$FIELD_ENCLOSURE2\""
                        STR="$STR\n TRAILING NULLCOLS"
                        STR="$STR\n($COLUM"
                else
                        STR="$STR,\n$COLUM"
                fi
        done
        STR=" $STR)'\nFROM DUAL;\nspool off\n"
        echo "$STR" >> control_file.sql
done