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Johnny Weng Luu  
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 More options May 17 2012, 5:58 pm
From: Johnny Weng Luu <johnny.weng....@gmail.com>
Date: Thu, 17 May 2012 14:58:12 -0700 (PDT)
Local: Thurs, May 17 2012 5:58 pm
Subject: Delete all nodes and relationships
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First of all, thank you so much for introducing mutative Cypher. It totally
rocks!!! :D

I usually delete all nodes and relationships with two queries:

All nodes with relationships:

      START n = node(*)
      MATCH n-[r]-()
      DELETE n, r

All nodes without relationships:

      START n = node(*)
      DELETE n

Is there a way to delete all nodes and relationships with just one query?

I thought this one would do it but it failed:

      START n = node(*)
      MATCH n-[r?]-()
      DELETE n, r

Johnny


 
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Michael Hunger  
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 More options May 17 2012, 6:11 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Fri, 18 May 2012 00:11:52 +0200
Local: Thurs, May 17 2012 6:11 pm
Subject: Re: [Neo4j] Delete all nodes and relationships
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How did it fail?

It shouldn't at least not in 1.8-SNAPSHOT ?

Michael

Am 17.05.2012 um 23:58 schrieb Johnny Weng Luu:


 
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Johnny Weng Luu  
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 More options May 17 2012, 6:29 pm
From: Johnny Weng Luu <johnny.weng....@gmail.com>
Date: Thu, 17 May 2012 15:29:08 -0700 (PDT)
Local: Thurs, May 17 2012 6:29 pm
Subject: Re: [Neo4j] Delete all nodes and relationships
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It doesn't delete anything and it messes up the db so I can't delete any
node afterwards.

I'm using the latest 1.8 Heroku add-on.

Johnny


 
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Johnny Weng Luu  
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 More options May 17 2012, 6:29 pm
From: Johnny Weng Luu <johnny.weng....@gmail.com>
Date: Thu, 17 May 2012 15:29:55 -0700 (PDT)
Local: Thurs, May 17 2012 6:29 pm
Subject: Re: [Neo4j] Delete all nodes and relationships
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Perhaps the problem is that when "r" is not available but yet I have "r" in
DELETE?

Johnny


 
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Michael Hunger  
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 More options May 17 2012, 6:34 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Fri, 18 May 2012 00:34:51 +0200
Local: Thurs, May 17 2012 6:34 pm
Subject: Re: [Neo4j] Delete all nodes and relationships
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You mean it messes up the console?

Heroku uses 1.8.M02 imho.

Does it work for you here http://console.neo4j.org ?

Oh, you might want to exclude the root node (with where ID(n) <> 0)

Michael

Am 18.05.2012 um 00:29 schrieb Johnny Weng Luu:


 
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Johnny Luu  
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 More options May 19 2012, 7:31 pm
From: Johnny Luu <johnny.weng....@gmail.com>
Date: Sun, 20 May 2012 01:31:11 +0200
Local: Sat, May 19 2012 7:31 pm
Subject: Re: [Neo4j] Delete all nodes and relationships
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Why <> 0? Is it possible for an ID to be less than 0?

Johnny

Sent from my iPad

On 18 maj 2012, at 00:34, Michael Hunger <michael.hun...@neotechnology.com> wrote:


 
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Peter Neubauer  
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 More options May 20 2012, 3:13 am
From: Peter Neubauer <neubauer.pe...@gmail.com>
Date: Sun, 20 May 2012 09:13:51 +0200
Local: Sun, May 20 2012 3:13 am
Subject: Re: [Neo4j] Delete all nodes and relationships
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No,
It's just that "! =" is already claimed for optional properties...

Send from mobile.
On May 20, 2012 1:31 AM, "Johnny Luu" <johnny.weng....@gmail.com> wrote:


 
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