added user-defined-functions.csv (#1060)

* added user-defined-functions.csv

Author: kaxuna

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/connector/snowflake/SnowflakeLogsConnector.java

@@ -300,6 +300,20 @@ public final void addTasksTo(
     out.add(new FormatTask(FORMAT_NAME));
     out.add(SnowflakeYamlSummaryTask.create(FORMAT_NAME, arguments));
 
+    if (arguments.isAssessment()) {
+      String userDefinedFunctions =
+          "SELECT FUNCTION_SCHEMA, FUNCTION_NAME, FUNCTION_LANGUAGE, ARGUMENT_SIGNATURE, "
+              + "FUNCTION_OWNER, COMMENT, VOLATILITY, RUNTIME_VERSION, LAST_ALTERED, "
+              + "PACKAGES, IMPORTS, IS_AGGREGATE, IS_DATA_METRIC, IS_MEMOIZABLE "
+              + "FROM SNOWFLAKE.ACCOUNT_USAGE.FUNCTIONS "
+              + "WHERE FUNCTION_SCHEMA != 'INFORMATION_SCHEMA' "
+              + "AND DELETED IS NULL";
+      out.add(
+          new JdbcSelectTask(
+                  "user_defined_functions.csv", userDefinedFunctions, TaskCategory.OPTIONAL)
+              .withHeaderClass(FunctionsHeader.class));
+    }
+
     // (24 * 7) -> 7 trailing days == 168 hours
     // Actually, on Snowflake, 7 days ago starts at midnight in an unadvertised time zone. What the
     // <deleted>.
@@ -507,6 +521,23 @@ String viewName() {
     }
   }
 
+  private enum FunctionsHeader {
+    FUNCTION_SCHEMA,
+    FUNCTION_NAME,
+    FUNCTION_LANGUAGE,
+    ARGUMENT_SIGNATURE,
+    FUNCTION_OWNER,
+    COMMENT,
+    VOLATILITY,
+    RUNTIME_VERSION,
+    LAST_ALTERED,
+    PACKAGES,
+    IMPORTS,
+    IS_AGGREGATE,
+    IS_DATA_METRIC,
+    IS_MEMOIZABLE
+  }
+
   @Nonnull
   static String formatPrefix(@Nonnull Class<? extends Enum<?>> enumClass, @Nonnull String view) {
     String selectList =