Add the feature which filter for getting messages from SQLChatMessageHistory

[wjkim00]

Checked

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Feature request

We used SQLChatMessageHistory for storing the conversation of Human/AI. The methods: add_ai_message, add_user_message can store the messages to connected sqlite db.
However, getting messages from db will show all of the message stored in table of db. The BaseMessage has many parameters such as content, id, name, and so on. So I think it would be nice to have this feature.

What feature?

When get the messages from sqlite db, I want to get only messages what I want. This means, the messages which are set the name is "name1" are shown by filtering feature.

Motivation

The tables in db has many data for many topics. We also create the dbs or tables for each topic. But it is violated about db's purpose, I think. So the filtering feature is neccessary for us.

Proposal (If applicable)

from langchain_community.chat_message_histories import SQLChatMessageHistory
...

SQLChatMessageHistory.get_messages(filter: name="myName" | None)
...