Update run.sh to print execution time

Author: Archy-X

presto/run.sh

@@ -6,7 +6,8 @@ queryNum=1
 cat queries.sql | while read query; do
     for i in $(seq 1 $TRIES); do
 	echo "Running query $queryNum: $query"
-        /opt/presto-cli --server 127.0.0.1:8080 --schema "clickbench_parquet" --session offset_clause_enabled=true --catalog "hive" --execute "${query}"
+        /opt/presto-cli --server 127.0.0.1:8080 --user clickbench_runner --schema "clickbench_parquet" --session offset_clause_enabled=true --catalog "hive" --execute "${query}"
+        execution_time=$(/opt/presto-cli --server 127.0.0.1:8080 --user clickbench_manager --execute "SELECT date_diff('millisecond',started,\"end\") FROM system.runtime.queries WHERE user='clickbench_runner' ORDER BY created DESC LIMIT 1" | tr -d '"') && echo "Execution time: ${execution_time}ms"
     done
     ((queryNum++))
 done