Thanks for ur reply zheng , I am facing difficulties in understanding their code ..because i am not yet acquainted to that style of coding .. Thats the reason why i was asking about the documentation and stuff .. Anyway i'll try u understand the code ..
Thanks! On Tue, Oct 13, 2009 at 11:12 PM, Zheng Shao <[email protected]> wrote: > AST are built by Hive.g (Using antlr). > AST -> OperatorTree is done by SemanticAnalyzer.java. > Optimizations are done by Transformer.java and its sub classes. > Hope this help you get started. > > Zheng > > > On Tue, Oct 13, 2009 at 10:01 AM, bharath v < > [email protected]> wrote: > >> Thanks for your reply Ning , >> >> I saw that page , but we need some detailed description .. such as how >> optimizations are carried out .. how ASTs are built etc .. >> Do u (or any others) have any idea abt them .. Kindly reply >> >> Thanks ! >> >> >> On Tue, Oct 13, 2009 at 7:10 PM, Ning Zhang <[email protected]> wrote: >> >>> The design doc in Hive's wiki page provides some high level >>> descriptions. See http://wiki.apache.org/hadoop/Hive/Design >>> the "compilation" and "optimization" sections. >>> >>> Ning >>> >>> On Oct 13, 2009, at 4:09 AM, bharath vissapragada wrote: >>> >>> > Hi all , >>> > >>> > We are trying to work on the Optimizer part of hive . Can anyone >>> > point me to a document/link containing how Hive designs it's query >>> > plans , >>> > what meta data it uses , how it optimizes the plans (pushing down >>> > selects etc) ... Iam facing difficulties is reading the source >>> > code , so it would >>> > be nice if any one point me to the link containing the above data or >>> > any document containing the same. >>> > >>> > Any help is highly appreciated ! >>> > >>> > Thanks ! >>> >>> >> > > > -- > Yours, > Zheng >
