优化数据表字段信息缓存方式, fix #51
优化数据表字段信息缓存方式, fix #51

74sharlock/thinkjs,75team/thinkjs,maxzhang/thinkjs,75team/thinkjs,maxzhang/thinkjs,maxzhang/thinkjs,akira-cn/thinkjs,lukw00/thinkjs,thinkjs/thinkjs,75team/thinkjs,snadn/thinkjs,akira-cn/thinkjs,akira-cn/thinkjs,lukw00/thinkjs,Qihoo360/thinkjs,74sharlock/thinkjs