Package org.apache.derby.impl.sql.compile

Class ResultSetNode.QueryExpressionClauses

java.lang.Object

org.apache.derby.impl.sql.compile.ResultSetNode.QueryExpressionClauses

Enclosing class:

ResultSetNode

static class ResultSetNode.QueryExpressionClauses
extends java.lang.Object

For ease of pushing order by, offset and fetch first/next clauses into nodes. Clauses on the same nesting level have the same index in the lists, so at any level, any of the lists' elements may be empty. For example, (select * from t order by a fetch next 5 rows only) order by b would have

            obl[0] = "order by a",
            offset[0] = null,
            fetchFirst[0] = "next 5 rows"
 

and

            obl[1] = "order by b",
            offset[1] = null
            fetchFirst[1] = null
 

When starting pushing clauses for a new level, always remember to do a push() before adding the clauses via setOffset(org.apache.derby.impl.sql.compile.ValueNode), setFetchFirst(org.apache.derby.impl.sql.compile.ValueNode), setOrderByList(org.apache.derby.impl.sql.compile.OrderByList) and setHasJDBCLimitClause(java.lang.Boolean).

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.List<ValueNode>	fetchFirst
private java.util.List<java.lang.Boolean>	hasJDBCLimitClause
private java.util.List<OrderByList>	obl
private java.util.List<ValueNode>	offset

Constructor Summary

Constructors

Constructor	Description
QueryExpressionClauses()

Method Summary

Modifier and Type	Method	Description
(package private) ValueNode	getFetchFirst(int i)
(package private) java.lang.Boolean[]	getHasJDBCLimitClause()
(package private) ValueNode	getOffset(int i)
(package private) OrderByList	getOrderByList(int i)
(package private) boolean	hasOffsetFetchFirst()
(package private) void	push()
(package private) void	setFetchFirst(int i, ValueNode v)
(package private) void	setFetchFirst(ValueNode v)
(package private) void	setHasJDBCLimitClause(java.lang.Boolean b)
(package private) void	setOffset(int i, ValueNode v)
(package private) void	setOffset(ValueNode v)
(package private) void	setOrderByList(int i, OrderByList obl)
(package private) void	setOrderByList(OrderByList obl)
(package private) int	size()

Methods inherited from class java.lang.Object

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

Field Detail

obl

private final java.util.List<OrderByList> obl

offset

private final java.util.List<ValueNode> offset

fetchFirst

private final java.util.List<ValueNode> fetchFirst

hasJDBCLimitClause

private final java.util.List<java.lang.Boolean> hasJDBCLimitClause

Constructor Detail

QueryExpressionClauses

public QueryExpressionClauses()

Method Detail

size

int size()

push

void push()

setOrderByList

void setOrderByList(OrderByList obl)

setOffset

void setOffset(ValueNode v)

setFetchFirst

void setFetchFirst(ValueNode v)

setHasJDBCLimitClause

void setHasJDBCLimitClause(java.lang.Boolean b)

getOrderByList

OrderByList getOrderByList(int i)

setOrderByList

void setOrderByList(int i,
                    OrderByList obl)

getOffset

ValueNode getOffset(int i)

setOffset

void setOffset(int i,
               ValueNode v)

getFetchFirst

ValueNode getFetchFirst(int i)

setFetchFirst

void setFetchFirst(int i,
                   ValueNode v)

getHasJDBCLimitClause

java.lang.Boolean[] getHasJDBCLimitClause()

hasOffsetFetchFirst

boolean hasOffsetFetchFirst()