diff --git a/evadb/catalog/models/utils.py b/evadb/catalog/models/utils.py
index 2c2271f4bc..e179b6b636 100644
--- a/evadb/catalog/models/utils.py
+++ b/evadb/catalog/models/utils.py
@@ -169,6 +169,8 @@ class FunctionIOCatalogEntry:
     function_id: int = None
     function_name: str = None
     row_id: int = None
+    required: bool = True
+    # asterisk: bool = False # Accept any number of additional arguments
 
     def display_format(self):
         data_type = self.type.name
@@ -232,13 +234,27 @@ def _to_str(col):
             col_display = col.display_format()
             return f"{col_display['name']} {col_display['data_type']}"
 
+        return {
+            "name": self.name,
+            "inputs": [_to_str(col) for col in self.args],
+            "outputs": [_to_str(col) for col in self.outputs],
+            "type": self.type,
+            # "impl": self.impl_file_path,
+            # "metadata": self.metadata,
+        }
+
+    def display_format_with_metadata(self):
+        def _to_str(col):
+            col_display = col.display_format()
+            return f"{col_display['name']} {col_display['data_type']}"
+
         return {
             "name": self.name,
             "inputs": [_to_str(col) for col in self.args],
             "outputs": [_to_str(col) for col in self.outputs],
             "type": self.type,
             "impl": self.impl_file_path,
-            "metadata": self.metadata,
+            "metadata": [m.display_format() for m in self.metadata],
         }
 
 
diff --git a/evadb/executor/create_function_executor.py b/evadb/executor/create_function_executor.py
index f686794184..a4985ef040 100644
--- a/evadb/executor/create_function_executor.py
+++ b/evadb/executor/create_function_executor.py
@@ -897,7 +897,7 @@ def _resolve_function_io(
 
         except FunctionIODefinitionError as e:
             err_msg = (
-                f"Error creating function, input/output definition incorrect: {str(e)}"
+                f"Error creating function ({function}), input/output definition incorrect: {str(e)}"
             )
             logger.error(err_msg)
             raise RuntimeError(err_msg)
diff --git a/evadb/executor/show_info_executor.py b/evadb/executor/show_info_executor.py
index 16871b8435..ad09b3cbaa 100644
--- a/evadb/executor/show_info_executor.py
+++ b/evadb/executor/show_info_executor.py
@@ -40,6 +40,10 @@ def exec(self, *args, **kwargs):
             functions = self.catalog().get_all_function_catalog_entries()
             for function in functions:
                 show_entries.append(function.display_format())
+        elif self.node.show_type is ShowType.FUNCTIONS_ALL:
+            functions = self.catalog().get_all_function_catalog_entries()
+            for function in functions:
+                show_entries.append(function.display_format_with_metadata())
         elif self.node.show_type is ShowType.TABLES:
             tables = self.catalog().get_all_table_catalog_entries()
             for table in tables:
diff --git a/evadb/expression/function_expression.py b/evadb/expression/function_expression.py
index c9ebe69909..ab7df1ef88 100644
--- a/evadb/expression/function_expression.py
+++ b/evadb/expression/function_expression.py
@@ -124,6 +124,17 @@ def evaluate(self, batch: Batch, **kwargs) -> Batch:
         func = self._gpu_enabled_function()
         # record the time taken for the function execution
         # note the function might be using cache
+        # Verify that the batch has all the required columns
+        actual_cols = set([col.split(".")[-1] for col in batch.columns])
+        for expected_col in self.function_obj.args:
+            #TODO: Figure out why required is not copying over correctly
+            # if not expected_col.required:
+                # continue
+        
+            assert (
+                expected_col.name in actual_cols
+            ), f"Column '{expected_col.name}' not found in batch with columns {actual_cols}"
+
         with self._stats.timer:
             # apply the function and project the required columns
             outcomes = self._apply_function_expression(func, batch, **kwargs)
diff --git a/evadb/functions/decorators/io_descriptors/abstract_types.py b/evadb/functions/decorators/io_descriptors/abstract_types.py
index e8b8ad4b20..8b91aba779 100644
--- a/evadb/functions/decorators/io_descriptors/abstract_types.py
+++ b/evadb/functions/decorators/io_descriptors/abstract_types.py
@@ -55,6 +55,7 @@ def __init__(
         is_nullable: bool = None,
         array_type: NdArrayType = None,
         array_dimensions: Tuple[int] = None,
+        required: bool = True,
     ) -> None:
         """The parameters like shape, data type are passed as parameters to be initialized
 
@@ -68,6 +69,7 @@ def __init__(
         self.is_nullable = is_nullable
         self.array_type = array_type
         self.array_dimensions = array_dimensions
+        self.required = required
 
     def generate_catalog_entries(
         self, is_input=False
@@ -85,6 +87,7 @@ def generate_catalog_entries(
                 is_nullable=self.is_nullable,
                 array_type=self.array_type,
                 array_dimensions=self.array_dimensions,
+                required=self.required,
                 is_input=is_input,
             )
         ]
diff --git a/evadb/functions/decorators/io_descriptors/data_types.py b/evadb/functions/decorators/io_descriptors/data_types.py
index 45a1dc4d28..26d309743c 100644
--- a/evadb/functions/decorators/io_descriptors/data_types.py
+++ b/evadb/functions/decorators/io_descriptors/data_types.py
@@ -12,7 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import List, Tuple, Type
+from typing import List, Tuple, Type, Optional
 
 from evadb.catalog.catalog_type import ColumnType, Dimension, NdArrayType
 from evadb.catalog.models.function_io_catalog import FunctionIOCatalogEntry
@@ -41,7 +41,40 @@ def __init__(
             array_dimensions=dimensions,
         )
 
+# class PandasColumn:
+#     def __init__(self, name: str, type: NdArrayType = NdArrayType.ANYTYPE,
+#                  shape: Tuple = (None,), is_nullable: Optional[bool] = None):
+#         self.name = name
+#         self.type = type
+#         self.shape = shape
+#         self.is_nullable = is_nullable
 
+#         assert self.name is not None, "Column name cannot be None"
+#         assert self.type is not None, "Column type cannot be None"
+#         assert self.shape is not None, "Column shape cannot be None. Did you mean (None,)?"
+
+class PandasColumn(IOColumnArgument):
+    def __init__(self, name: str, type: NdArrayType = NdArrayType.ANYTYPE,
+                 shape: Tuple = None, is_nullable: Optional[bool] = None,
+                 required: bool = True):
+
+        assert name is not None, "Column name cannot be None"
+        assert type is not None, "Column type cannot be None"
+        assert shape is not None, "Column shape cannot be None. Did you mean (None,) to indicate any shape?"
+
+        super().__init__(
+            name=name,
+            type=NdArrayType.ANYTYPE,
+            is_nullable=is_nullable,
+            array_type=type,
+            array_dimensions=shape,
+            required=required,
+        )
+
+# class PandasColumnAsterick(PandasColumn):
+#     def __init__(self):
+#         super().__init__(name='*', type=NdArrayType.ANYTYPE, shape=Dimension.ANYDIM, is_nullable=None)
+        
 class PyTorchTensor(IOColumnArgument):
     """Descriptor data type for PyTorch Tensor"""
 
@@ -60,6 +93,32 @@ def __init__(
             array_dimensions=dimensions,
         )
 
+class NewPandasDataFrame(IOArgument):
+    """Descriptor data type for Pandas Dataframe"""
+
+    def __init__(self, columns=List[PandasColumn]) -> None:
+        super().__init__()
+        self.columns = columns
+    
+    def generate_catalog_entries(self, is_input) -> List[type[FunctionIOCatalogEntry]]:
+        assert self.columns is not None, "Columns cannot be None"
+        # assert len(self.columns) > 0, "Columns cannot be empty"
+
+        catalog_entries = []
+        for column in self.columns:
+            catalog_entries.append(
+                FunctionIOCatalogEntry(
+                    name=column.name,
+                    type=ColumnType.NDARRAY,
+                    is_nullable=column.is_nullable,
+                    array_type=column.type,
+                    array_dimensions=column.array_dimensions,
+                    required=column.required,
+                    is_input=is_input,
+                )
+            )
+
+        return catalog_entries
 
 class PandasDataframe(IOArgument):
     """Descriptor data type for Pandas Dataframe"""
diff --git a/evadb/functions/decorators/utils.py b/evadb/functions/decorators/utils.py
index b5a9611143..8b09d0932a 100644
--- a/evadb/functions/decorators/utils.py
+++ b/evadb/functions/decorators/utils.py
@@ -16,7 +16,10 @@
 
 from evadb.catalog.models.function_io_catalog import FunctionIOCatalogEntry
 from evadb.functions.abstract.abstract_function import AbstractFunction
+from evadb.utils.errors import FunctionIODefinitionError
 
+HELP_LINK = 'https://evadb.readthedocs.io/en/stable/source/reference/ai/custom-ai-function.html#yolo-object-detection'
+HELP_DESCRIPTOR = 'Refer to the documentation for more information: ' + HELP_LINK
 
 def load_io_from_function_decorators(
     function: Type[AbstractFunction], is_input=False
@@ -43,9 +46,19 @@ def load_io_from_function_decorators(
                     io_signature = base_class.forward.tags[tag_key]
                     break
 
-    assert (
-        io_signature is not None
-    ), f"Cannot infer io signature from the decorator for {function}."
+    if io_signature is None:
+        if not hasattr(function.forward, "tags"):
+            raise FunctionIODefinitionError("No tags found in the forward function. Please make sure to use the @forward decorator with both input and output signatures.\n"+HELP_DESCRIPTOR)
+
+        if hasattr(function.forward, "tags") and tag_key not in function.forward.tags:
+            raise FunctionIODefinitionError(f"Could not detect {tag_key} signature for {function}. Please check the @forward decorator for {function}.\n"+HELP_DESCRIPTOR)
+
+    if (type(io_signature) is list) and (len(io_signature) == 0):
+        raise FunctionIODefinitionError(f"Could not detect {tag_key} signature for {function}. Please check the @forward decorator for {function}.\n"+HELP_DESCRIPTOR)
+
+    # assert (
+    #     io_signature is not None
+    # ), f"Cannot infer io signature from the decorator for {function}. Please check the {tag_key} of the forward function."
 
     result_list = []
     for io in io_signature:
diff --git a/evadb/functions/dummy.py b/evadb/functions/dummy.py
new file mode 100644
index 0000000000..e36e147d56
--- /dev/null
+++ b/evadb/functions/dummy.py
@@ -0,0 +1,47 @@
+from typing import Optional
+
+from evadb.catalog.catalog_type import NdArrayType
+from evadb.functions.abstract.abstract_function import AbstractFunction
+from evadb.functions.decorators.decorators import forward, setup
+from evadb.functions.decorators.io_descriptors.data_types import PandasDataframe, PandasColumn, NewPandasDataFrame
+
+class Dummy(AbstractFunction):
+    @setup(cacheable=False, function_type='dummy', batchable=True)
+    def setup(self, metric:Optional[str]=None):
+        self.metric = metric
+        self.count = 0
+
+    @property
+    def name(self) -> str:
+        return "Dummy"
+
+    @forward(
+        input_signatures=[
+            NewPandasDataFrame(
+                columns=[
+                    PandasColumn('race', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    PandasColumn('age', type=NdArrayType.INT16, shape=(None,), is_nullable=False),
+                    PandasColumn('sex', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    PandasColumn('charge', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    PandasColumn('n_prior', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    PandasColumn('stay', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    PandasColumn('huh', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+
+                    # Should let users know that this column was not found
+                    # PandasColumn('non-extant_col', type=NdArrayType.ANYTYPE, shape=(None,), is_nullable=False, required=False),
+                    # PandasColumn('class', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    # PandasColumn('predicted', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                ]
+            )
+        ],
+        output_signatures=[
+            NewPandasDataFrame(
+                columns=[
+                    PandasColumn('class', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                    PandasColumn('predicted', type=NdArrayType.STR, shape=(None,), is_nullable=False),
+                ]
+            )
+        ]
+    )
+    def forward(self, data: PandasDataframe) -> PandasDataframe:
+        return data
\ No newline at end of file
diff --git a/evadb/functions/function_bootstrap_queries.py b/evadb/functions/function_bootstrap_queries.py
index f8186d4dd3..a71a9db5f8 100644
--- a/evadb/functions/function_bootstrap_queries.py
+++ b/evadb/functions/function_bootstrap_queries.py
@@ -214,6 +214,12 @@
     EvaDB_INSTALLATION_DIR
 )
 
+Dummy_function_query = """CREATE FUNCTION IF NOT EXISTS Dummy
+        IMPL '{}/functions/dummy.py';
+        """.format(
+    EvaDB_INSTALLATION_DIR
+)
+
 Upper_function_query = """CREATE FUNCTION IF NOT EXISTS UPPER
         INPUT  (input ANYTYPE)
         OUTPUT (output NDARRAY STR(ANYDIM))
@@ -285,9 +291,10 @@ def init_builtin_functions(db: EvaDBDatabase, mode: str = "debug") -> None:
         Yolo_function_query,
         stablediffusion_function_query,
         dalle_function_query,
-        Upper_function_query,
-        Lower_function_query,
-        Concat_function_query,
+        # Upper_function_query,
+        # Lower_function_query,
+        # Concat_function_query,
+        Dummy_function_query,
     ]
 
     # if mode is 'debug', add debug functions
@@ -309,5 +316,7 @@ def init_builtin_functions(db: EvaDBDatabase, mode: str = "debug") -> None:
             execute_query_fetch_all(
                 db, query, do_not_print_exceptions=False, do_not_raise_exceptions=True
             )
-        except Exception:
-            pass
+        except Exception as e:
+            print('Exception on ',query)
+            print('Exception: ', e)
+
diff --git a/evadb/parser/evadb.lark b/evadb/parser/evadb.lark
index 86798df6c0..b56b106843 100644
--- a/evadb/parser/evadb.lark
+++ b/evadb/parser/evadb.lark
@@ -197,7 +197,7 @@ describe_statement: DESCRIBE table_name
     
 help_statement: HELP STRING_LITERAL
     
-show_statement: SHOW (FUNCTIONS | TABLES | uid | DATABASES)
+show_statement: SHOW (FUNCTIONS | FUNCTIONS_ALL | TABLES | uid | DATABASES)
 
 explain_statement: EXPLAIN explainable_statement
 
@@ -421,6 +421,7 @@ TABLES:                              "TABLES"i
 TO:                                  "TO"i
 TRUE:                                "TRUE"i
 FUNCTIONS:                           "FUNCTIONS"i
+FUNCTIONS_ALL:                       "FUNCTIONS_ALL"i
 UNION:                               "UNION"i
 UNIQUE:                              "UNIQUE"i
 UNKNOWN:                             "UNKNOWN"i
diff --git a/evadb/parser/lark_visitor/_show_statements.py b/evadb/parser/lark_visitor/_show_statements.py
index ca9581aca7..73cd9d62a5 100644
--- a/evadb/parser/lark_visitor/_show_statements.py
+++ b/evadb/parser/lark_visitor/_show_statements.py
@@ -29,5 +29,7 @@ def show_statement(self, tree):
             return ShowStatement(show_type=ShowType.TABLES)
         elif isinstance(token, str) and str.upper(token) == "DATABASES":
             return ShowStatement(show_type=ShowType.DATABASES)
+        elif isinstance(token, str) and str.upper(token) == "FUNCTIONS_ALL":
+            return ShowStatement(show_type=ShowType.FUNCTIONS_ALL)
         elif token is not None:
             return ShowStatement(show_type=ShowType.CONFIG, show_val=self.visit(token))
diff --git a/evadb/parser/show_statement.py b/evadb/parser/show_statement.py
index d7eca052f2..924e400218 100644
--- a/evadb/parser/show_statement.py
+++ b/evadb/parser/show_statement.py
@@ -38,6 +38,8 @@ def __str__(self):
         show_str = ""
         if self.show_type == ShowType.FUNCTIONS:
             show_str = "FUNCTIONS"
+        elif self.show_type == ShowType.FUNCTIONS_ALL:
+            show_str = "FUNCTIONS_ALL"
         elif self.show_type == ShowType.TABLES:
             show_str = "TABLES"
         elif self.show_type == ShowType.CONFIG:
diff --git a/evadb/parser/types.py b/evadb/parser/types.py
index 227a768c7b..d6ca5841b7 100644
--- a/evadb/parser/types.py
+++ b/evadb/parser/types.py
@@ -70,6 +70,7 @@ class FileFormatType(EvaDBEnum):
 
 class ShowType(EvaDBEnum):
     FUNCTIONS  # noqa: F821
+    FUNCTIONS_ALL # noqa: F821
     TABLES  # noqa: F821
     CONFIG  # noqa: F821
     DATABASES  # noqa: F821
diff --git a/evadb/plan_nodes/show_info_plan.py b/evadb/plan_nodes/show_info_plan.py
index 733cc0401d..e257b31248 100644
--- a/evadb/plan_nodes/show_info_plan.py
+++ b/evadb/plan_nodes/show_info_plan.py
@@ -34,7 +34,7 @@ def show_val(self):
         return self._show_val
 
     def __str__(self):
-        if self._show_type == ShowType.FUNCTIONS:
+        if self._show_type == ShowType.FUNCTIONS or self._show_type == ShowType.FUNCTIONS_ALL:
             return "ShowFunctionPlan"
         if self._show_type == ShowType.DATABASES:
             return "ShowDatabasePlan"
diff --git a/test/integration_tests/long/functions/test_dummy.py b/test/integration_tests/long/functions/test_dummy.py
new file mode 100644
index 0000000000..20fc548d0e
--- /dev/null
+++ b/test/integration_tests/long/functions/test_dummy.py
@@ -0,0 +1,76 @@
+import unittest
+
+import pandas as pd
+from evadb.server.command_handler import execute_query_fetch_all
+from evadb.configuration.constants import EvaDB_DATABASE_DIR, EvaDB_ROOT_DIR
+from test.util import (
+    get_evadb_for_testing,
+    shutdown_ray,
+    load_functions_for_testing
+)
+
+compas_dataset = '/home/jeff/evadb/data/divexplorer/compas_discretized.csv'
+
+class DummyTest(unittest.TestCase):
+    def setUp(self):
+        self.evadb = get_evadb_for_testing()
+        self.evadb.catalog().reset()
+        execute_query_fetch_all(self.evadb, "DROP FUNCTION IF EXISTS Dummy;")
+        print('Dropped')
+        load_functions_for_testing(self.evadb, mode='debug')
+
+    def tearDown(self):
+        shutdown_ray()
+        execute_query_fetch_all(self.evadb, "DROP TABLE IF EXISTS test_csv;")
+        print('Dropped function')
+        execute_query_fetch_all(self.evadb, "DROP FUNCTION IF EXISTS Dummy;")
+
+    # def test_show(self):
+    #     # show_query = "SHOW FUNCTIONS;"
+    #     # show_query = "SHOW FUNCTIONS;"
+    #     show_query = "SHOW FUNCTIONS_ALL;"
+    #     result = execute_query_fetch_all(self.evadb, show_query)
+    #     # print(result.columns)
+    #     # print(type(result))
+    #     # print(result.frames[['name', 'inputs', 'outputs']])
+    #     # print(result.frames)
+    #     print(result)
+    #     print(result.frames)
+
+
+    def test_dummy_function(self):
+        import time
+
+        create_table_query = """
+            CREATE TABLE IF NOT EXISTS test_csv(
+                age INTEGER,
+                charge TEXT(30),
+                race TEXT(30),
+                sex TEXT(10),
+                n_prior TEXT(30),
+                stay TEXT(10),
+                class INTEGER,
+                predicted INTEGER
+            );
+        """
+        load_query = f"LOAD CSV '{compas_dataset}' INTO test_csv;"
+
+        execute_query_fetch_all(self.evadb, create_table_query)
+        execute_query_fetch_all(self.evadb, load_query)
+        # print(execute_query_fetch_all(self.evadb, "SELECT * FROM MyCompas LIMIT 10;"))
+
+        create_fn_query = (
+            f"""CREATE FUNCTION IF NOT EXISTS Dummy 
+                IMPL  '{EvaDB_ROOT_DIR}/evadb/functions/dummy.py';"""
+        )
+        execute_query_fetch_all(self.evadb, create_fn_query)
+
+        t = time.time()
+        # SELECT Dummy(age, charge, race, sex, n_prior, stay, class, predicted) from test_csv;
+        print(execute_query_fetch_all(self.evadb, "SELECT * FROM test_csv;"))
+        select_query = """
+        SELECT Dummy(*) from test_csv;
+        """
+        result = execute_query_fetch_all(self.evadb, select_query)
+        print(result)
+        print('overall time', time.time() - t)
\ No newline at end of file