simpledb.parse
Class QueryData

java.lang.Object
  simpledb.parse.QueryData

public class QueryData
extends java.lang.Object

Data for the SQL select statement.

Author:

Edward Sciore

Constructor Summary

QueryData(java.util.Collection<java.lang.String> fields, java.util.Collection<java.lang.String> tables, Predicate pred)
Saves the field and table list and predicate.

Method Summary

java.util.Collection<java.lang.String>	fields() Returns the fields mentioned in the select clause.
Predicate	pred() Returns the predicate that describes which records should be in the output table.
java.util.Collection<java.lang.String>	tables() Returns the tables mentioned in the from clause.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryData

public QueryData(java.util.Collection<java.lang.String> fields,
                 java.util.Collection<java.lang.String> tables,
                 Predicate pred)

Saves the field and table list and predicate.

Method Detail

fields

public java.util.Collection<java.lang.String> fields()

Returns the fields mentioned in the select clause.

Returns:

a collection of field names

tables

public java.util.Collection<java.lang.String> tables()

Returns the tables mentioned in the from clause.

Returns:

a collection of table names

pred

public Predicate pred()

Returns the predicate that describes which records should be in the output table.

Returns:

the query predicate

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object