Shell commands to ALTER a pg_shard distributed table

alter-pgshard-table.sh

TABLE_NAME=customer_reviews
ALTER_COMMAND="ALTER COLUMN customer_id SET STATISTICS 1000"
 
psql -h localhost -d postgres -c "ALTER TABLE $TABLE_NAME $ALTER_COMMAND"
psql -tA -F" " -h localhost -d postgres -c "select relname, s.id, p.node_name, p.node_port from pg_class c, pgs_distribution_metadata.shard s, pgs_distribution_metadata.shard_placement p where s.relation_id = c.oid and s.id = p.shard_id and relname = '$TABLE_NAME'" | xargs -n 4 -P 100 sh -c 'psql -h $3 -p $4 -d postgres -c "ALTER TABLE $1_$2 $0;"' "$ALTER_COMMAND"