org.hsqldb

Class ExpressionOrderBy

java.lang.Object

org.hsqldb.Expression

org.hsqldb.ExpressionOrderBy

All Implemented Interfaces:

java.lang.Cloneable

public class ExpressionOrderBy
extends Expression

Implementation of ORDER BY operations

Since:

1.9.0

Field Summary

Fields inherited from class org.hsqldb.Expression

BINARY, LEFT, RIGHT, TERNARY, UNARY

Method Summary

Modifier and Type	Method and Description
java.lang.String	getSQL() For use with CHECK constraints.
java.lang.Object	getValue(Session session)
void	resolveTypes(Session session, Expression parent)

Methods inherited from class org.hsqldb.Expression

checkValidCheckConstraint, duplicate, equals, equals, getAggregatedValue, getColumn, getCondition, getConstantValueNoCheck, getResult, getRowValue, getSubqueries, getTable, getType, getUnkeyedColumns, hasCondition, hashCode, isCorrelated, isFalse, isIndexable, isTrue, materialise, resolveCheckOrGenExpression, resolveColumnReferences, resolveColumnReferences, setCollation, setCondition, testCondition, updateAggregatingValue

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Method Detail

getValue

public java.lang.Object getValue(Session session)

Overrides:

getValue in class Expression

resolveTypes

public void resolveTypes(Session session,
                         Expression parent)

Overrides:

resolveTypes in class Expression

getSQL

public java.lang.String getSQL()

Description copied from class: Expression

For use with CHECK constraints. Under development. Currently supports a subset of expressions and is suitable for CHECK search conditions that refer only to the inserted/updated row. For full DDL reporting of VIEW select queries and CHECK search conditions, future improvements here are dependent upon improvements to SELECT query parsing, so that it is performed in a number of passes. An early pass should result in the query turned into an Expression tree that contains the information in the original SQL without any alterations, and with tables and columns all resolved. This Expression can then be preserved for future use. Table and column names that are not user-defined aliases should be kept as the HsqlName structures so that table or column renaming is reflected in the precompiled query.

Overrides:

getSQL in class Expression