Get table schema details from a Slack reaction
A reaction can flag a table question for a quick schema lookup in the original conversation.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Get Table Schema
Get detailed schema information for a specific table including column definitions, types, keys, and optionally sample data. this is essential for ai agents to understand table structure before constructing queries.
Why this helps
A teammate may spot an important schema question but forget to look up the answer after moving on.
- Turns a visible reaction into a clear next step.
- Returns schema details in the conversation that needs them.
- Helps prevent downstream SQL based on guessed columns.
Setup
Build it in a few focused steps.
- 1Connect Slack and ClickHouse to Notis once through the portal.
- 2Create an automation through the portal, or tell Notis what to do in plain language.
- 3Write one instruction asking Notis to fetch the named ClickHouse table schema when a chosen reaction marks a table-structure question.
- 4Select Message Reaction Added as the trigger and choose a channel for run reports.
- 5Test with a real message naming a table and the reaction intended to request its schema.
Questions about this workflow
What if the table name is missing?
Instruct Notis to ask for the table name instead of guessing which schema to fetch.
Will it return sample data?
The table schema action can optionally include sample data. Tell Notis whether sample rows are useful for this workflow.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to ClickHouse. A trigger fires from one place; an action lands in another.
Slack triggers
ClickHouse actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Execute ClickHouse Query
Execute a sql query in clickhouse and return the results. this is the primary action for querying data from clickhouse databases.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Get Database Schema
Get comprehensive schema overview of an entire database including all tables and optionally their column definitions. essential for ai agents to understand the complete database structure in a single call.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Get Table Schema
Get detailed schema information for a specific table including column definitions, types, keys, and optionally sample data. this is essential for ai agents to understand table structure before constructing queries.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
List ClickHouse Databases
List all databases in the clickhouse instance. useful for discovering available databases before querying tables.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
List ClickHouse Tables
List tables in clickhouse databases. returns information about tables including their engine, size, and row count.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Connect any two apps with Notis in the middle.
Slack and ClickHouse, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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