openapi: 3.1.0
info:
  title: TiDB Cloud API Keys SQL Refinement API
  description: The TiDB Cloud API is a REST interface that provides programmatic access to manage administrative objects within TiDB Cloud. It supports managing projects, clusters, backups, restores, data imports, billing, and private endpoint connections across both TiDB Cloud Serverless and TiDB Cloud Dedicated tiers. The API uses HTTP Digest Authentication with public and private API keys and returns JSON-formatted responses. Available as both v1beta and the newer v1beta1 versions, it enables automation of database infrastructure lifecycle management at scale.
  version: v1beta1
  contact:
    name: TiDB Cloud Support
    url: https://docs.pingcap.com/tidbcloud/api-overview/
  termsOfService: https://www.pingcap.com/legal/privacy-policy/
servers:
- url: https://dedicated.tidbapi.com/v1beta1
  description: Dedicated Cluster API Server
- url: https://iam.tidbapi.com/v1beta1
  description: IAM API Server
- url: https://billing.tidbapi.com/v1beta1
  description: Billing API Server
security:
- digestAuth: []
tags:
- name: SQL Refinement
  description: Operations for refining and improving previously generated SQL queries.
paths:
  /v3/refineSql:
    post:
      operationId: refineSql
      summary: Refine a SQL query
      description: Takes a previously generated SQL query and a refinement instruction, then produces an improved SQL statement. Use this endpoint to iteratively improve query accuracy based on user feedback without starting a new query generation from scratch.
      tags:
      - SQL Refinement
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RefineSqlRequest'
      responses:
        '200':
          description: SQL refined successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Chat2DataResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimitExceeded'
components:
  schemas:
    RefineSqlRequest:
      type: object
      description: Request body for refining a previously generated SQL query.
      required:
      - cluster_id
      - database
      - question
      - sql
      - task
      properties:
        cluster_id:
          type: string
          description: The ID of the TiDB Cloud cluster.
        database:
          type: string
          description: The database within the cluster.
        question:
          type: string
          description: The original natural language question that produced the SQL.
        sql:
          type: string
          description: The SQL query to be refined.
        task:
          type: string
          description: A description of how to refine the SQL query.
    Chat2DataResult:
      type: object
      description: The result of a Chat2Data SQL generation and execution.
      properties:
        question_id:
          type: string
          description: A unique identifier for this question and result pair.
        sql:
          type: string
          description: The SQL statement that was generated from the natural language question.
        rows:
          type: array
          description: The query result rows returned by executing the generated SQL.
          items:
            type: object
            additionalProperties: true
        columns:
          type: array
          description: The column definitions for the query result.
          items:
            $ref: '#/components/schemas/ColumnDefinition'
    ColumnDefinition:
      type: object
      description: A column definition in a query result set.
      properties:
        col:
          type: string
          description: The column name.
        data_type:
          type: string
          description: The SQL data type of the column.
        nullable:
          type: boolean
          description: Whether the column can contain NULL values.
    ErrorResponse:
      type: object
      description: Standard error response returned when an API request fails.
      properties:
        code:
          type: integer
          description: The error code.
        msg:
          type: string
          description: A human-readable error message describing the failure.
    Chat2DataResponse:
      type: object
      description: API response wrapper for a Chat2Data operation.
      properties:
        code:
          type: integer
          description: The response code. 200 indicates success.
        msg:
          type: string
          description: A message describing the result.
        result:
          $ref: '#/components/schemas/Chat2DataResult'
  responses:
    Unauthorized:
      description: Authentication failed. Check your Chat2Query API key credentials.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: The request body or parameters are invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    RateLimitExceeded:
      description: Rate limit exceeded. The Chat2Query API allows 100 requests per day per Data App. Contact TiDB Cloud support to request a higher limit.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    digestAuth:
      type: http
      scheme: digest
      description: HTTP Digest Authentication using a TiDB Cloud API public key as the username and private key as the password. Keys are generated in the TiDB Cloud console under Organization Settings > API Keys.
externalDocs:
  description: TiDB Cloud API Overview
  url: https://docs.pingcap.com/tidbcloud/api-overview/