spo.src.Test
Class QueryGenerator

java.lang.Object
  |
  +--spo.src.Test.QueryGenerator

public class QueryGenerator

extends java.lang.Object

A class that generates queries for testing the SPO data management system Overall Constraints: # of random variables: 200 # of elements in context: <= 6 # of elements in conditional: <= 3 random variables: CS100 ~ CS299 context elements: year, semester, major, college, instructor, comments

Field Summary

(package private) char	CHAR_START
(package private) int	CONTEXT_LEN
(package private) int	DOMAIN_SIZE
(package private) static java.lang.String	RELATION_NAME
(package private) static java.lang.String	RelName_L
(package private) static java.lang.String	RelName_R
(package private) int	VAR_LEN
(package private) int	VAR_RATIO
(package private) int	VAR_START
(package private) int	YEAR_START

Constructor Summary

QueryGenerator(java.lang.String lname, java.lang.String rname)
Initialize an instance for the class

Method Summary

java.lang.String[]	getConditional() Generate the conditional element for the SPOs in XML format random variables: CS100 ~ CS149
java.lang.String[]	getContext() Generate the context element for the SPO in XML format context elements: year, semester, major, college, instructor, comments year: 1976 ~ 2001 semester: "AA" ~ "ZZ" major: "AA" ~ "ZZ" college: "AA" ~ "ZZ" instructor: "AA" ~ "ZZ" comments: "AA" ~ "ZZ"
float	getProbability() Generate the probability for each row in the table element of the SPO
java.lang.String	getQuery(java.lang.String type) Generate query for testing based on the type
java.lang.String	getValue() Generate a value of the participating random variable
java.lang.String	getVariable() Generate a participating random variable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

YEAR_START

final int YEAR_START

See Also:

Constant Field Values

CHAR_START

final char CHAR_START

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Constant Field Values

CONTEXT_LEN

final int CONTEXT_LEN

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Constant Field Values

VAR_START

final int VAR_START

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Constant Field Values

VAR_LEN

final int VAR_LEN

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Constant Field Values

VAR_RATIO

final int VAR_RATIO

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Constant Field Values

DOMAIN_SIZE

final int DOMAIN_SIZE

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Constant Field Values

RELATION_NAME

static java.lang.String RELATION_NAME

RelName_L

static java.lang.String RelName_L

RelName_R

static java.lang.String RelName_R

Constructor Detail

QueryGenerator

public QueryGenerator(java.lang.String lname,
                      java.lang.String rname)

Initialize an instance for the class

Parameters:

lname - the default relation of left relation

rname - the right relation of cartesian product and join

Method Detail

getQuery

public java.lang.String getQuery(java.lang.String type)

Generate query for testing based on the type

Parameters:

type - the type of query to be generated

getContext

public java.lang.String[] getContext()

Generate the context element for the SPO in XML format context elements: year, semester, major, college, instructor, comments year: 1976 ~ 2001 semester: "AA" ~ "ZZ" major: "AA" ~ "ZZ" college: "AA" ~ "ZZ" instructor: "AA" ~ "ZZ" comments: "AA" ~ "ZZ"

getConditional

public java.lang.String[] getConditional()

Generate the conditional element for the SPOs in XML format random variables: CS100 ~ CS149

getVariable

public java.lang.String getVariable()

Generate a participating random variable

getValue

public java.lang.String getValue()

Generate a value of the participating random variable

getProbability

public float getProbability()

Generate the probability for each row in the table element of the SPO