Question

我有一个以这种方式制作的样本星型模式：

author (id, name)
book (id, name)
sample_fact_table (id, authorfk, bookfk, quantity)

其中obiouvsly authorfk是author.id的FK，bookfk是FK to book.id。

维度为：＆＃34;作者＆＃34;，＆＃34;书＆＃34;。措施是＆＃34;数量＆＃34;。

我使用Pentaho Schema Workbench工具为多维数据集进行了此配置：

<Schema name="MySchema">
  <Dimension type="StandardDimension" visible="true" name="Author">
    <Hierarchy visible="true" hasAll="true" allMemberName="All Authors" primaryKey="id">
      <Table name="author">
      </Table>
      <Level name="Name" visible="true" table="author" column="id" nameColumn="name" uniqueMembers="false">
      </Level>
    </Hierarchy>
  </Dimension>
  <Dimension type="StandardDimension" visible="true" name="Book">
    <Hierarchy visible="true" hasAll="true" allMemberName="All Books" primaryKey="id">
      <Table name="book">
      </Table>
      <Level name="Name" visible="true" table="book" column="id" nameColumn="name" uniqueMembers="false">
      </Level>
    </Hierarchy>
  </Dimension>
  <Cube name="TestCube" visible="true" cache="true" enabled="true">
    <Table name="sample_fact_table">
    </Table>
    <DimensionUsage source="Author" name="Author" visible="true" foreignKey="authorfk">
    </DimensionUsage>
    <DimensionUsage source="Book" name="Book" visible="true" foreignKey="bookfk">
    </DimensionUsage>
    <Measure name="quantity" column="quantity" aggregator="sum" visible="true">
    </Measure>
  </Cube>
</Schema>

如果我尝试执行MDX查询：

select 
Measures.quantity ON COLUMNS,
NON EMPTY Author.Children ON ROWS
from [TestCube]

我的结果很好：

Axis #0:
{}
Axis #1:
{[Measures].[quantity]}
Axis #2:
{[author].[Al]}
{[author].[John]}
{[author].[Jack]}
Row #0: 3
Row #1: 9
Row #2: 1

但如果不是作者而是我在Book上查询，就像这样：

select 
Measures.quantity ON COLUMNS,
NON EMPTY Book.Children ON ROWS
from [TestCube]

我收到此错误：

Mondrian Error:Failed to parse query 'select 
Measures.quantity ON COLUMNS,
NON EMPTY Book.Children ON ROWS
from [TestCube]'

Mondrian Error:MDX object 'Book' not found in cube 'TestCube'

我做错了什么？

Author和Book都是Dimensions，两者都以相同的方式声明，都引用到Cube。

谢谢！

简单的Olap Cube和简单的查询MDX

0 个答案: