Add check_tables_dont_reference_haf_types

This checks that no user table has reference to haf sql type.
Such column would be dropped during upgrade, so the update script
refuses to continue when it is found.

src/hive_fork_manager/hive_fork_manager_update_script_generator.sh.in

@@ -137,6 +137,19 @@ make_update() {
   sudo -Enu "$DB_ADMIN" psql -w $POSTGRES_ACCESS -d "$DB_NAME" -v ON_ERROR_STOP=on -U "$DB_ADMIN" -c "ALTER EXTENSION hive_fork_manager UPDATE"
 }
 
+check_tables_dont_reference_haf_types() {
+  echo
+  echo "Checking that none table references HAF type..."
+
+  # hive.operation is explicitly ignored, because we never drop this type, so it's safe as a column.
+  query="
+    SELECT table_schema,table_name,column_name,udt_schema,udt_name
+      FROM information_schema.columns
+      WHERE udt_schema='hive' AND table_schema<>'hive' AND udt_name<>'operation'"
+  sudo -Enu "$DB_ADMIN" psql -w $POSTGRES_ACCESS -d "$DB_NAME" -v ON_ERROR_STOP=on -U "$DB_ADMIN" -q -t -A -c "$query" | \
+    awk -F'|' '{print($1"."$2, "contains column", $3, "of type", $4"."$5, "which would be dropped on upgrade")} END{exit NR > 0 ? 4 : 0}'
+}
+
 check_functions_were_updated() {
   echo
   echo "Checking that all C functions were properly updated..."
@@ -157,6 +170,8 @@ get_deployed_version
 
 generate_final_update_script
 
+check_tables_dont_reference_haf_types
+
 make_update
 
 check_functions_were_updated