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superset2/superset/mcp_service/sql_lab/schemas.py

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Python

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, 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.
"""Schemas for SQL Lab MCP tools."""
from typing import Any
from pydantic import BaseModel, Field, field_validator
class ExecuteSqlRequest(BaseModel):
"""Request schema for executing SQL queries."""
database_id: int = Field(
..., description="Database connection ID to execute query against"
)
sql: str = Field(..., description="SQL query to execute")
schema_name: str | None = Field(
None, description="Schema to use for query execution", alias="schema"
)
limit: int = Field(
default=1000,
description="Maximum number of rows to return",
ge=1,
le=10000,
)
timeout: int = Field(
default=30, description="Query timeout in seconds", ge=1, le=300
)
parameters: dict[str, Any] | None = Field(
None, description="Parameters for query substitution"
)
@field_validator("sql")
@classmethod
def sql_not_empty(cls, v: str) -> str:
if not v or not v.strip():
raise ValueError("SQL query cannot be empty")
return v.strip()
class ColumnInfo(BaseModel):
"""Column metadata information."""
name: str = Field(..., description="Column name")
type: str = Field(..., description="Column data type")
is_nullable: bool | None = Field(None, description="Whether column allows NULL")
class ExecuteSqlResponse(BaseModel):
"""Response schema for SQL execution results."""
success: bool = Field(..., description="Whether query executed successfully")
rows: Any | None = Field(
None, description="Query result rows as list of dictionaries"
)
columns: list[ColumnInfo] | None = Field(
None, description="Column metadata information"
)
row_count: int | None = Field(None, description="Number of rows returned")
affected_rows: int | None = Field(
None, description="Number of rows affected (for DML queries)"
)
query_id: str | None = Field(None, description="Query tracking ID")
execution_time: float | None = Field(
None, description="Query execution time in seconds"
)
error: str | None = Field(None, description="Error message if query failed")
error_type: str | None = Field(None, description="Type of error if failed")
class OpenSqlLabRequest(BaseModel):
"""Request schema for opening SQL Lab with context."""
database_connection_id: int = Field(
..., description="Database connection ID to use in SQL Lab"
)
schema_name: str | None = Field(
None, description="Default schema to select in SQL Lab", alias="schema"
)
dataset_in_context: str | None = Field(
None, description="Dataset name/table to provide as context"
)
sql: str | None = Field(None, description="SQL query to pre-populate in the editor")
title: str | None = Field(None, description="Title for the SQL Lab tab/query")
class SqlLabResponse(BaseModel):
"""Response schema for SQL Lab URL generation."""
url: str = Field(..., description="URL to open SQL Lab with context")
database_id: int = Field(..., description="Database ID used")
schema_name: str | None = Field(None, description="Schema selected", alias="schema")
title: str | None = Field(None, description="Query title")
error: str | None = Field(None, description="Error message if failed")