Multi Database MCP Server

package domain import ( "context" ) // Database represents a database connection and operations type Database interface { Query(ctx context.Context, query string, args ...interface{}) (Rows, error) Exec(ctx context.Context, statement string, args ...interface{}) (Result, error) Begin(ctx context.Context, opts *TxOptions) (Tx, error) } // Rows represents database query results type Rows interface { Close() error Columns() ([]string, error) Next() bool Scan(dest ...interface{}) error Err() error } // Result represents the result of a database operation type Result interface { RowsAffected() (int64, error) LastInsertId() (int64, error) } // Tx represents a database transaction type Tx interface { Commit() error Rollback() error Query(ctx context.Context, query string, args ...interface{}) (Rows, error) Exec(ctx context.Context, statement string, args ...interface{}) (Result, error) } // TxOptions represents options for starting a transaction type TxOptions struct { ReadOnly bool } // PerformanceAnalyzer for analyzing database query performance type PerformanceAnalyzer interface { GetSlowQueries(limit int) ([]SlowQuery, error) GetMetrics() (PerformanceMetrics, error) AnalyzeQuery(query string) (QueryAnalysis, error) Reset() error SetThreshold(threshold int) error } // SlowQuery represents a slow query that has been recorded type SlowQuery struct { Query string Duration float64 Timestamp string } // PerformanceMetrics represents database performance metrics type PerformanceMetrics struct { TotalQueries int AvgDuration float64 MaxDuration float64 SlowQueries int Threshold int LastResetTime string } // QueryAnalysis represents the analysis of a SQL query type QueryAnalysis struct { Query string ExplainPlan string } // SchemaInfo represents database schema information type SchemaInfo interface { GetTables() ([]string, error) GetColumns(table string) ([]ColumnInfo, error) GetIndexes(table string) ([]IndexInfo, error) GetConstraints(table string) ([]ConstraintInfo, error) } // ColumnInfo represents information about a database column type ColumnInfo struct { Name string Type string Nullable bool Default string } // IndexInfo represents information about a database index type IndexInfo struct { Name string Table string Columns []string Unique bool Primary bool } // ConstraintInfo represents information about a database constraint type ConstraintInfo struct { Name string Type string Table string Columns []string ReferencedTable string ReferencedColumns []string } // DatabaseRepository defines methods for managing database connections type DatabaseRepository interface { GetDatabase(id string) (Database, error) ListDatabases() []string GetDatabaseType(id string) (string, error) IsLazyLoading() bool }