in Greenplum generate DDL of database objects - greenplum

Question

is there any way, by which I can generate a DDL of GP Functions
My actual requirement is I want to create/generate DDL of each objects available in particular schema in separate SQL file
I am able to do it for tables and views via below script
tbl_list=`psql -At -c "select tablename from pg_tables where schemaname ='${PGSCHEMA}' and tablename not like '%_prt_%' order by 1;"` # Fetch all table Name
for fname in $tbl_list
do
ddl=`PGPASSWORD='passwd' pg_dump -h 10.128.19.297 -U gpadmin jiodata -s -t "${PGSCHEMA}.$fname" >${script_dir}/${output_dir}/$fname.sql` # Fetch ddl for all tables
#pg_dump -h 10.128.19.297 -U gpadmin jiodata -s -t "${PGSCHEMA}.$fname" >${script_dir}/${output_dir}/$fname.sql
echo "Table DDL generated : "${PGSCHEMA}.$fname | tee -a ${log_file}
done
Did any one tried it for Functions
Please help if anyone know
Thanks

Answer 1

Create a sql file named "get_functions.sql" with this code:
select sub.function_name || '(' || array_to_string(array_agg(typname), ',') || ')'
from (
select n.nspname as schema_name, proname as function_name, unnest(proallargtypes) as parm_type, unnest(proargmodes) as parm_direction
from pg_proc p
join pg_namespace n on p.pronamespace = n.oid
where n.nspname = :schema_name
) as sub
join pg_type t on sub.parm_type = t.oid
where sub.parm_direction = 'i'
group by sub.function_name;
Next, create a bash script with this:
#!/bin/bash
set -e
schema_name="$1"
if [ "$schema_name" == "" ]; then
echo "ERROR: You must provide the schema name."
echo "Example usage: ./runme.sh gp_toolkit"
exit 1
fi
echo "pg_dump -Fc -s -n $schema_name > $schema_name.sql"
pg_dump -Fc -s -n $schema_name > $schema_name.sql
for i in $(psql -t -A -v schema_name="'$schema_name'" -f get_functions.sql); do
filename=$(echo $i | tr \( _ | tr \) _)
filename+=".sql"
echo "cat $schema_name.sql | pg_restore -P '$i' > $filename"
cat $schema_name.sql | pg_restore -P ''$i'' > $filename
done
Fix the permissions on the script.
chmod 755 runme.sh
And execute the script.
./runme.sh gp_toolkit
This will create a file per function and it allows for overloaded functions too.