dialect

type Dialect interface {
	// GetName get dialect's name
	GetName() string

	// ShowColumns show columns of specified table
	ShowColumns(table string) string

	// ShowTables show tables of database
	ShowTables() string

	// Insert
	Insert(comp *SQLComponent) string

	// Delete
	Delete(comp *SQLComponent) string

	// Update
	Update(comp *SQLComponent) string

	// Select
	Select(comp *SQLComponent) string

	// GetDelimiter return the delimiter of Dialect.
	GetDelimiter() string
}

type H map[string]interface{}

type Join struct {
	Table     string
	FieldA    string
	Operation string
	FieldB    string
}

type RawUpdate struct {
	Expression string
	Args       []interface{}
}

type SQLComponent struct {
	Fields     []string
	TableName  string
	Wheres     []Where
	Leftjoins  []Join
	Args       []interface{}
	Order      string
	Offset     string
	Limit      string
	WhereRaws  string
	UpdateRaws []RawUpdate
	Statement  string
	Values     H
}

type Where struct {
	Operation string
	Field     string
	Qmark     string
}