org.h2.command.query

类 AllColumnsForPlan

java.lang.Object

org.h2.command.query.AllColumnsForPlan

public class AllColumnsForPlan
extends Object

This information is expensive to compute for large queries, so do so on-demand. Also store the information pre-mapped by table to avoid expensive traversal.

构造器概要

构造器

构造器和说明
AllColumnsForPlan(TableFilter[] filters)

方法概要

限定符和类型	方法和说明
void	add(Column newCol) Called by ExpressionVisitor.
ArrayList<Column>	get(Table table) Used by index to calculate the cost of a scan.

从类继承的方法 java.lang.Object

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

构造器详细资料

AllColumnsForPlan

public AllColumnsForPlan(TableFilter[] filters)

方法详细资料

add

public void add(Column newCol)

Called by ExpressionVisitor.

参数:

newCol - new column to be added.

get

public ArrayList<Column> get(Table table)

Used by index to calculate the cost of a scan.

参数:

table - the table.

返回:

all table's referenced columns.