sc

type SysTabler interface {
	Tree()
	Insert(trx *mtrs.Transaction, st *statement.Insert)
	Tfm() *tfm.TableFileManage
	// 用于载入元组
	LoadTuple(create *statement.Create)
}

type SystemCache struct {
	//sys_tables
	Sys_tables SysTabler
	// sys_fields
	Sys_fields SysTabler
	// sys_columns
	Sys_columns SysTabler
	// sys_indexes
	Sys_index SysTabler
}