@@ 397,6 397,25 @@ def filterio(specs, operation, domain=No
     return out[0]
 
 
+def prepared(engine, operation, domain):
+    q = (
+        'select s.id, s.inputdata, s.metadata, s.rule '
+        'from rework.sched as s, rework.operation as o '
+        'where s.domain = %(domain)s and '
+        '      s.operation = o.id and '
+        '      o.name = %(operation)s'
+    )
+    return [
+        (sid, nary_unpack(inp), meta, rule)
+        for sid, inp, meta, rule in
+        engine.execute(
+            q,
+            operation=operation,
+            domain=domain
+        ).fetchall()
+    ]
+
+
 # binary serializer
 
 def nary_pack(*bytestr):

          

@@ 6,6 6,7 @@ from rework.helper import (
     filterio,
     iospec,
     host,
+    prepared,
     unpack_io,
     unpack_iofile,
     unpack_iofiles_length

          
@@ 402,6 403,38 @@ def test_prepare_with_inputs(engine, cle
     unpacked_file = unpack_iofile(spec, inputdata, 'myfile.txt')
     assert unpacked_file == b'some file'
 
+    prep = prepared(engine, 'yummy', 'default')
+    assert prep == [
+        (4,
+         (b'myfile.txt',
+          b'weight',
+          b'birthdate',
+          b'sometime',
+          b'name',
+        b'option',
+          b'some file',
+          b'65',
+          b'1973-05-20T09:00:00',
+          b'(date "1973-5-20")',
+          b'Babar',
+          b'foo'),
+         {'user': 'Babar'},
+         '* * * * * *'),
+        (5,
+         (b'myfile.txt',
+          b'weight',
+          b'birthdate',
+          b'name',
+          b'option',
+          b'some file',
+          b'65',
+          b'1973-05-20T00:00:00',
+          b'Babar',
+          b'foo'),
+         None,
+         '* * * * * *')
+    ]
+
 
 def test_prepare_inputs_nr_domain_mismatch(engine, cleanup):
     reset_ops(engine)