docs: add csv use case (#16756)

libs/community/langchain_community/agent_toolkits/sql/base.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 
 import warnings
-from typing import TYPE_CHECKING, Any, Dict, List, Literal, Optional, Sequence, Union
+from typing import TYPE_CHECKING, Any, Dict, Literal, Optional, Sequence, Union
 
 from langchain_core.messages import AIMessage, SystemMessage
 from langchain_core.prompts import BasePromptTemplate, PromptTemplate
@@ -40,7 +40,6 @@ def create_sql_agent(
     prefix: Optional[str] = None,
     suffix: Optional[str] = None,
     format_instructions: Optional[str] = None,
-    input_variables: Optional[List[str]] = None,
     top_k: int = 10,
     max_iterations: Optional[int] = 15,
     max_execution_time: Optional[float] = None,
@@ -70,9 +69,6 @@ def create_sql_agent(
         format_instructions: Formatting instructions to pass to
             ZeroShotAgent.create_prompt() when 'agent_type' is
             "zero-shot-react-description". Otherwise ignored.
-        input_variables: DEPRECATED. Input variables to explicitly specify as part of
-            ZeroShotAgent.create_prompt() when 'agent_type' is
-            "zero-shot-react-description". Otherwise ignored.
         top_k: Number of rows to query for by default.
         max_iterations: Passed to AgentExecutor init.
         max_execution_time: Passed to AgentExecutor init.
@@ -203,7 +199,10 @@ def create_sql_agent(
         )
 
     else:
-        raise ValueError(f"Agent type {agent_type} not supported at the moment.")
+        raise ValueError(
+            f"Agent type {agent_type} not supported at the moment. Must be one of "
+            "'openai-tools', 'openai-functions', or 'zero-shot-react-description'."
+        )
 
     return AgentExecutor(
         name="SQL Agent Executor",