Data Exchange: Semantics and Query Answering Ronald Fagin -- IBM Almaden Research Center Phokion G. Kolaitis -- UC Santa Cruz Renee J. Miller -- University of ...
Are we running low on any parts needed to build a ZX600 sports car? What is total component and assembly cost to build ZX600 at today's part prices? ...
QNET: A tool for querying protein interaction networks ... Worm. Sharan, Roded et al. (2005), PNAS. Network Querying Problem. Species A. well studied ...
Are we running low on any parts needed to build a ZX600 sports car? What is total component and assembly cost to build ZX600 at today's part prices? ...
Use batching to amortize decisions. Offset overhead. Use the tuple pool to cluster similar tuples ... Want a routing policy that handles a wide variety of ...
demonstrates difficulty of providing good approximate answers to join queries. proposes join synopses as the efficient ... sum (nisi) = Total memory allocated ...
Ronald Fagin -- IBM Almaden Research Center. Phokion G. Kolaitis -- UC Santa Cruz ... How to restructure data from a source schema to a target schema, according to a ...
... subset O of S. In the std dynamic pgming algo we perform: O. S-O ... In the join root algo we perform. Note that these plans are stored as plans for S. S-O ...
An ad hoc query takes a database and returns some data from it: ... as a free standing function - deprecated in the most recent version, but e.g. in ...
Ex 1: Find all employees working at research dept. SELECT EMPLOYEE.LNAME, ADDRESS. FROM EMPLOYEE, DEPARTMENT. WHERE DEPARTMENT.NAME= Research' AND DNUMBER=DNO; Ex 2: ...
Pick access methods (AMs) on the driven tables (scan, hash, or index) Order the driven tables ... Static optimization: explore all possibilities and pick best ...
Extent to which re-optimization is not worthwhile leads to performance regression. ... Adding CHECKs above a materialization point (SORT, TEMP etc) ...
Hack to System R: treat predicates like joins. not an issue with Volcano ... Query sent only to relevant sites. S. Sudarshan: Recent Advances in Query Optimization ...
Operators be composed into producer and consumer relationship. Independent: ... Compose large pipelined segment. Run pipelined segments independently ...
... quickly to store inventory information, call tickets, etc. and are tech savvy. HR may adopt slowly as they use many paper forms and are not so tech savvy ...
It can extract data from existing XML documents and construct new documents (transformations) ... CONSTRUCT clause specifies how to assemble the query results in XML ...
Structural Joins: A Primitive for Efficient XML Query Pattern Matching. Shurug Al-Khalifa, H. V. Jagadish, Nick Koudas, Jignesh M. Patel, Divesh Srivastava, Yuqing Wu ...
... aggregate queries based on statistical summaries of the full data, it is often ... has very few tuples, even when the actual join selectivity is fairly high. ...
Joliot-Curie 15, 50-383 Wroclaw, Poland. inikep@ii.uni.wroc.pl. 2 The Szczecin University ... XML has become a popular standard, with many useful applications ...
would return the names of all employees and the attribute SALARY is multiplied by 110 ... SQL includes a BETWEEN comparison operator in order to simplify WHERE clauses ...
LO1 - 1.1, 1.2, 1.4. LO2 - 1.3, 1.5. LO3 - 1.6. Value of SDBMS ... LO1 : Understand the value of SDBMS. LO2: Understand the concept of spatial databases ...
Packets(pID, length, [time] ... Packets(pID, src, dest, length, [time]) Log packet count and total packet length for each 'flow' new flow defined by ...
... Query Results. Gautam Das, Surajit Chaudhuri, Vagelis Hristidis, Gerhard Weikum ... Not a very selective query Has many matching tuples. Thus needs some ...
... Edge shredding approach ... Inlining shredding technique can be used when an XML Schema ... Another advantage is Inlining shreds and stores XML documents into ...
HDF5 FastQuery Accelerating Complex Queries on HDF Datasets using Fast Bitmap Indices John Shalf, Wes Bethel LBNL Visualization Group Kensheng Wu, Kurt Stockinger
Conventional join access path followed by a sort to remove duplicate rows. ... ( 18 of the 20 rows resulting from the hash join were apparently duplicates. ...
Part 1: Efficient fixpoint evaluation ... Prolog is a language implemented in such a fashion. Technique is called resolution Example up(2,1) up(3,1) up ...
Initial distribution is important for query plan performance. ... (4) Resume execution of new plan. AB. BC. A. B. C (2) All tuples. drained (4) Processing ...
Irrelevant. Rater 1. Rater 2. Same Results Rated Differently. Average inter-rater reliability: 56 ... 31/50 rated as not irrelevant. Only 6/31 do more than one agree ...
Classic example: User likes cars. Query: 'jaguar' Why not focus on known, specific needs? User likes cars. User is interested in the 2006 Honda Civic. The QSR system ...
... and years of used cars. Used(price, year) :- Cost(model, ... cars. Cheap(price) :- Cost(model,price) Car. Sale. Information. Query: What price do cars made ...
Sub-queries must be placed on the right side of the comparison operator ... HIST 42513. PHSC 4542. CHEM 4113. IDIS 3543. 9 rows selected. 8. Example Data ...
Monitoring the dynamic Web to respond to Continuous Queries. Sandeep ... Users register long ... NIAGARA (DeWitt and Naughton) Query evaluation and ...
Authentication Overhaul. Object Property Editor. e.g.. TH1Editor, ... XML files allow the interchange of data with applications unable to read ROOT file directly ...