migration_tools.attempt_hz_date

diff --git a/sql/base/base.sql b/sql/base/base.sql
index b60dc80..c82ecd1 100644 (file)
--- a/sql/base/base.sql
+++ b/sql/base/base.sql
@@ -747,6 +747,27 @@ CREATE OR REPLACE FUNCTION migration_tools.attempt_timestamptz (TEXT,TEXT) RETUR
     END;
 $$ LANGUAGE PLPGSQL STRICT STABLE;
 
+CREATE OR REPLACE FUNCTION migration_tools.attempt_hz_date (TEXT,TEXT) RETURNS DATE AS $$
+    DECLARE
+        attempt_value ALIAS FOR $1;
+        fail_value ALIAS FOR $2;
+        output DATE;
+    BEGIN
+        FOR output IN
+            EXECUTE E'SELECT (\'1970-01-01\'::date + \'' || attempt_value || E' days\'::interval)::date AS a;'
+        LOOP
+            RETURN output;
+        END LOOP;
+    EXCEPTION
+        WHEN OTHERS THEN
+            FOR output IN
+                EXECUTE 'SELECT ' || quote_literal(fail_value) || '::date AS a;'
+            LOOP
+                RETURN output;
+            END LOOP;
+    END;
+$$ LANGUAGE PLPGSQL STRICT STABLE;
+
 CREATE OR REPLACE FUNCTION migration_tools.attempt_money (TEXT,TEXT) RETURNS NUMERIC(8,2) AS $$
     DECLARE
         attempt_value ALIAS FOR $1;