convert o creat function

functions/srce_edit.pgsql

@@ -1,6 +1,12 @@
 
 CREATE OR REPLACE FUNCTION tps.srce_set(_name text, _defn jsonb) RETURNS jsonb
 AS $f$
+
+DECLARE
+_cnt int;
+_conflict BOOLEAN;
+_message jsonb;
+
 BEGIN
 
 /*
@@ -9,6 +15,42 @@ BEGIN
 3. do merge
 */
 
+    -------check for transctions already existing under this source-----------
+    SELECT
+        COUNT(*)
+    INTO
+        _cnt
+    FROM
+        tps.trans
+    WHERE
+        srce = _name;
+
+    -------set a message------------------------------------------------------
+    IF _cnt > 0 THEN
+        _conflict = TRUE;
+        --get out of the function somehow
+        _message: = 
+        $$
+                {
+                    "message":"transactions already exist under source profile, cannot change the definition"
+                    ,"status":"error"
+                }
+        $$::jsonb;
+        return _message;
+    END IF;
+
+    /*-----------------schema validation---------------------
+    yeah dont feel like it right now
+    ---------------------------------------------------------*/
+    
+    INSERT INTO
+        tps.srce
+    SELECT
+        _name, _defn
+    ON CONFLICT DO UPDATE
+        SET
+            defn = _defn;
+
 
 END;
 $f$