reading from config file in a sql script

Question

I have a sql script where I create all the sequence used in the application as below. These values will be different for different servers. Instead of giving these hard coded values, I want to specify these in some config file Is there a way that I can read all these values from the config file in my sql script

CREATE SEQUENCE tbl1_tbl1id_seq AS INT START WITH 1 INCREMENT BY 2 MAXVALUE 50000;

CREATE SEQUENCE tbl2_tb21id_seq AS INT START WITH 1 INCREMENT BY 2 MAXVALUE 50000;

CREATE SEQUENCE tbl3_tbl3id_seq AS INT START WITH 1 INCREMENT BY 2 MAXVALUE 50000;

Answer 1

I could do that in the below fashion. I wrote a shell script which would read from the config file line by line, and generate sql statement writing to a new file. In the end, I excecute the new sql script from the script itself

INPUT=config.txt
OLDIFS=$IFS
IFS=','
[ ! -f $INPUT ] && { echo "$INPUT file not found"; exit 99; }


while read sequencename start_value increment_by maxvalue
do
        echo "SequenceName : $sequencename"
        echo "start value: $start_value"
        echo "increment by : $increment_by"
        echo "max_value : $maxvalue"
echo "CREATE SEQUENCE $sequencename  AS INT START WITH $start_value INCREMENT BY $increment_by MAXVALUE $maxvalue;" >> createsequence.sql
#done < $INPUT
done < <(tail -n +2 $INPUT) #This skips reading the header
IFS=$OLDIFS

The config.txt contains the below lines,

sequencename,start_value,increment_by,maxvalue
tbl1_tbl1id_seq , 1,2 ,50000;
tbl2_tbl2id_seq , 1,2, 50000;
tbl3_tbl3id_seq , 1, 2,50000;