Synchronize a postgres table through bash and csv

#!/bin/bash
DIR='/root/sql_dump'
mkdir -p "$DIR"
cd "$DIR"


SIZE=100000
#START=611244350
START=0
END=$((START + SIZE))
STOP=189097000
TABLNAME="schema.tablename"
while [[ $START -lt $STOP ]] && [[ $END -le $STOP ]]; do
    export PGPASSWORD="PASSWORD#1"
   
    echo "Read from SOURCE start $START end $END"
    FILE="${DIR}/dump${START}.csv"
    SQL="SELECT * FROM  ${TABLNAME} where id > $START and id <= $END"
    psql -U postgres -h SOURCEHOST -d DB1 -t -A -F"," -c "$SQL" > "$FILE"
   
    export PGPASSWORD="PASSWORD#1"
    SQL="DELETE FROM ${TABLNAME} where id > $START and id <= $END"
    psql -U postgres -h localhost -d DB2 -t -A -F"," -c "$SQL"
    psql -U postgres -h localhost -d DB2 -c "\copy ${TABLNAME} FROM '${FILE}' DELIMITER ',' CSV"
    echo "Injected to DESTINATION"
   
    START=$END
    END=$((START + SIZE))
    if [ $END -gt $STOP ]; then
        END=$STOP  
    fi
   
    rm $FILE

done