在Google应用引擎上修改/删除数据存储索引 [英] Modify/Delete datastore Index on google app engine

问题描述

我的旧web.xml是

 < datastore-index kind =TBLancestor =false> 
< property name =Col1direction =asc/> 
< property name =Col2direction =desc/> 
< property name =Col3direction =asc/> 
< property name =Col4direction =asc/> 
< property name =Col5direction =asc/> 
< property name =Col6direction =asc/> 
< property name =Col7direction =asc/> 
< property name =Col8direction =asc/> 
< / datastore-index> 
  

我的新web.xml是

 < datastore-index kind =TBLancestor =false> 
< property name =Col1direction =asc/> 
< property name =Col2direction =desc/> 
< property name =Col3direction =asc/> 
< property name =Col4direction =asc/> 
< property name =Col5direction =asc/> 
< property name =Col6direction =desc/> 
< property name =Col7direction =asc/> 
< property name =Col8direction =asc/> 
< / datastore-index> 
  

在服务器上创建索引

  TBL 
 ------------ 
 Col2▲，Col1▲，Col6▼
 Col4▲，Col1▲，Col6▼
 Col5▲，Col8▲，Col1▲，Col6▲=>我得到这个指数的错误
 Col8▲，Col1▲，Col6▲
 Col1▲，Col2▼，Col3▲，Col4▲，Col5▲，Col7▲，Col8▲
 Col1▲，Col2 ▼，Col3▲，Col4▲，Col5▲，Col6▼，Col7▲，Col8▲
 Col1▲，Col7▲
 Col1▲，Col6▲
 Col1▲，Col6▼
  

我得到的索引找不到第三个索引的错误。我想在所有索引中修改col6的方向并将其设置为desc。

我该怎么做？或者如何删除索引？

有人吗？

解决方案

您'寻找 vacuum_indexes 命令。
$ b

http://code.google.com/appengine/docs/python/tools/uploadinganapp.html# Deleting_Unused_Indexes

这适用于Java和Python应用程序。实际上，Java的appcfg.sh根本不支持这个，所以如果你正在运行一个Java应用程序，你将需要Python SDK。

My old web.xml was

<datastore-index kind="TBL" ancestor="false"> 
    <property name="Col1" direction="asc" /> 
    <property name="Col2" direction="desc" />
    <property name="Col3" direction="asc" />
    <property name="Col4" direction="asc" />
    <property name="Col5" direction="asc" />
    <property name="Col6" direction="asc" />
    <property name="Col7" direction="asc" />
    <property name="Col8" direction="asc" />                         
</datastore-index>  

My New web.xml is

<datastore-index kind="TBL" ancestor="false"> 
    <property name="Col1" direction="asc" /> 
    <property name="Col2" direction="desc" />
    <property name="Col3" direction="asc" />
    <property name="Col4" direction="asc" />
    <property name="Col5" direction="asc" />
    <property name="Col6" direction="desc" />
    <property name="Col7" direction="asc" />
    <property name="Col8" direction="asc" />                         
</datastore-index>  

Created index on server

TBL  
------------
Col2 ▲ , Col1 ▲ , Col6 ▼  
Col4 ▲ , Col1 ▲ , Col6 ▼  
Col5 ▲ , Col8 ▲ , Col1 ▲ , Col6 ▲ => I got error for this index
Col8 ▲ , Col1 ▲ , Col6 ▲   
Col1 ▲ , Col2 ▼ , Col3 ▲ , Col4 ▲ , Col5 ▲ , Col7 ▲ , Col8 ▲ 
Col1 ▲ , Col2 ▼ , Col3 ▲ , Col4 ▲ , Col5 ▲ , Col6 ▼ , Col7 ▲ , Col8 ▲ 
Col1 ▲ , Col7 ▲  
Col1 ▲ , Col6 ▲  
Col1 ▲ , Col6 ▼  

I am getting index not found error for 3rd index. I want to modify direction for col6 in all index and set it to "desc".

How can i do that? or how can i delete index?

Anybody?

解决方案

You're looking for the vacuum_indexes command.

http://code.google.com/appengine/docs/python/tools/uploadinganapp.html#Deleting_Unused_Indexes

This will work for both Java and Python apps. In fact, Java's appcfg.sh does not yet support this at all, so you'll need the Python SDK if you're running a Java app.

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