duckdb

type Engine struct {
	// contains filtered or unexported fields
}

type EngineConfig struct {
	MaxMemoryMB        int
	QueryTimeoutSec    int
	EnableQueryLog     bool
	EnableOptimization bool
	CacheSize          int
	IcebergCatalogName string // Name for the attached Iceberg catalog in DuckDB
	// Security settings
	EnableQueryValidation bool     // Enable SQL injection protection
	AllowedStatements     []string // Allowed SQL statement types (SELECT, SHOW, DESCRIBE, etc.)
	BlockedKeywords       []string // Blocked dangerous keywords
}

type EngineMetrics struct {
	QueriesExecuted  int64
	TablesRegistered int64
	CacheHits        int64
	CacheMisses      int64
	TotalQueryTime   time.Duration
	ErrorCount       int64
	BlockedQueries   int64 // Track blocked malicious queries
	// contains filtered or unexported fields
}

type QueryResult struct {
	Columns  []string
	Rows     [][]interface{}
	Schema   *arrow.Schema
	Table    arrow.Table
	RowCount int64
	Duration time.Duration
	QueryID  string
}

type SecurityError struct {
	Message string
	QueryID string
	Reason  string
}