Statement parsing method for database statement

A statement parsing method for a database statement, comprising steps of:

• performing lexical analysis on a database statement inputted to a client, to obtain an inputted word sequence;
• looking up a statement similarity table at the client according to the inputted word sequence, to determine whether an existing word sequence similar with the inputted word sequence is present in the statement similarity table at the client;
• wherein the statement similarity table at the client records a plurality of existing word sequences different from each other, and the plurality of existing word sequences have been obtained by the lexical analysis on respective database statements;
• sending a similar statement parsing request corresponding to the existing word sequence similar with the inputted word sequence to the database by the client, if the existing word sequence similar with the inputted word sequence is present in the statement similarity table at the client;
• looking up the statement similarity table at the database end according to the similar statement parsing request, to determine parsed data corresponding to the similar statement parsing request, wherein the statement similarity table at the database end records correspondence relationships between a plurality of similar statement parsing requests and respective parsed data, and the respective parsed data have been obtained respectively by a grammar parsing on the plurality of existing word sequences respectively corresponding to the plurality of similar statement parsing requests and have been \ used by the database for executing the respective database statements;
• executing by the database the database statement inputted to the client, based on the parsed data corresponding to the similar statement parsing request;
• and
• returning by the database an execution result to the client;
• wherein the statement similarity table at the client corresponds to and is updated synchronously with the statement similarity table at the database end.