Visual Analysis of Cost Based Database Optimizers Using Picasso Tool
نویسندگان
چکیده
منابع مشابه
Analyzing Plan Diagrams of Database Query Optimizers
A “plan diagram” is a pictorial enumeration of the execution plan choices of a database query optimizer over the relational selectivity space. In this paper, we present and analyze representative plan diagrams on a suite of popular commercial query optimizers for queries based on the TPC-H benchmark. These diagrams, which often appear similar to cubist paintings, provide a variety of interestin...
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15 صفحه اولVisual DCT - Visual EPICS Database Configuration Tool
VisualDCT [1] is an EPICS configuration tool completely written in Java and therefore supported in various systems. It was developed to provide features missing in existing configuration tools as Capfast [2] and GDCT [3]. Visually VisualDCT resembles GDCT records can be created, moved and linked, fields and links can be easily modified. But VisualDCT offers more: using groups, records can be gr...
متن کاملThe Picasso Database Query Optimizer Visualizer
Plan Diagram A visualization of the estimated behavior of a selected plan in the plan diagram, when this specific plan is used throughout the selectivity space. Plan-replacement Diagrams Reduced Plan Diagram Shows the extent to which the original plan diagram may be simplified (by replacing some of the plans with their siblings in the plan diagram) without increasing the cost of any individual ...
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The automated optimization of declarative SQL queries is a classical problem that has been diligently addressed by the database community over the last few decades. However, due to its inherent complexities and challenges, this area has largely remained a “black art”, and the quality of the query optimizer continues to be a key differentiator between competing database products, with large rese...
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ژورنال
عنوان ژورنال: International Journal of Computer Science and Information Technology
سال: 2012
ISSN: 0975-4660
DOI: 10.5121/ijcsit.2012.4120