package compiler;

//語(yǔ)法樹(shù)
public interface Query {
	public boolean FromSQL(String sql);	//對(duì)輸入的SQL語(yǔ)句進(jìn)行詞法分析和語(yǔ)法分析，構(gòu)建語(yǔ)法樹(shù)
	public AlgebraPlan ExcuteAgbPlan();	//根據(jù)語(yǔ)法樹(shù)生成邏輯查詢(xún)計(jì)劃
}