Re: Update/where statement Adds Row

[A]

Thank you.


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On Thursday, September 12, 2019, 1:09 AM, Hossein Ghiyasi Mehr 
 wrote:

Update in Cassandra is upsert (update or insert). So when you update a row 
which isn't exist, it will create it."IF EXIST" can be used in some queries.
On Thu, Sep 12, 2019 at 8:35 AM A  wrote:

I have an update statement that has a where clause with the primary key 
(email,companyid).
When executed it always creates a new row. It’s like it’s not finding the 
existing row with the primary key.
I’m using Cassandra-driver.
What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be using 
the where clause to identify the existing row?
Thanks,Angel


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Re: Update/where statement Adds Row

[Hossein Ghiyasi Mehr]

Update in Cassandra is upsert (update or insert). So when you update a row
which isn't exist, it will create it.
"IF EXIST" can be used in some queries.

On Thu, Sep 12, 2019 at 8:35 AM A  wrote:

> I have an update statement that has a where clause with the primary key
> (email,companyid).
>
> When executed it always creates a new row. It’s like it’s not finding the
> existing row with the primary key.
>
> I’m using Cassandra-driver.
>
> What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be
> using the where clause to identify the existing row?
>
> Thanks,
> Angel
>
>
>
> Sent from Yahoo Mail for iPhone
> 
>

Re: Update/where statement Adds Row

[Jon Haddad]

Probably not a great idea unless you're using it sparingly. Using LWTs
without knowing all the caveats is likely to lead to terrible cluster
performance.




On Wed, Sep 11, 2019, 10:59 PM A  wrote:

> Is it ok if I do this?
>
> ... where email = em AND company_id = id IF EXISTS
>
>
>
>
>
> Sent from Yahoo Mail for iPhone
> <https://overview.mail.yahoo.com/?.src=iOS>
>
> On Wednesday, September 11, 2019, 9:08 PM, JOHN, BIBIN 
> wrote:
>
> Use if exists clause.
>
>
>
> *UPDATE* table
>
> *SET* column ='something'
>
> WHERE key = ‘value’ IF EXISTS;
>
>
>
>
>
>
>
>
>
>
>
> *From:* A 
> *Sent:* Wednesday, September 11, 2019 11:05 PM
> *To:* User cassandra.apache.org 
> *Subject:* Update/where statement Adds Row
>
>
>
> I have an update statement that has a where clause with the primary key
> (email,companyid).
>
>
>
> When executed it always creates a new row. It’s like it’s not finding the
> existing row with the primary key.
>
>
>
> I’m using Cassandra-driver.
>
>
>
> What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be
> using the where clause to identify the existing row?
>
>
>
> Thanks,
>
> Angel
>
>
>
>
> Sent from Yahoo Mail for iPhone
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__overview.mail.yahoo.com_-3F.src-3DiOS=DwMFaQ=LFYZ-o9_HUMeMTSQicvjIg=eFshZuDXOwvmW_UjVcAH8Q=FgFsGQLanA1ngbbLdQ2MKd0wBFNiXHtKVDZIEi2z_Qk=ZTUXV9cgMyKnreKaza7UCRQTtJjk_iygFCPGYX5X1es=>
>
>

Re: Update/where statement Adds Row

[A]

Is it ok if I do this? 
... where email = em AND company_id = id IF EXISTS




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On Wednesday, September 11, 2019, 9:08 PM, JOHN, BIBIN  wrote:

#yiv9726893009 #yiv9726893009 -- _filtered #yiv9726893009 {panose-1:2 4 5 3 5 4 
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Use if exists clause.
 
  
 
UPDATE table
 
SET column ='something'
 
WHERE key = ‘value’ IF EXISTS;
 
  
 
  
 
  
 
  
 
  
 
From: A  
Sent: Wednesday, September 11, 2019 11:05 PM
To: User cassandra.apache.org 
Subject: Update/where statement Adds Row
 
  
 
I have an update statement that has a where clause with the primary key 
(email,companyid).
 
  
 
When executed it always creates a new row. It’s like it’s not finding the 
existing row with the primary key.
 
  
 
I’m using Cassandra-driver.
 
  
 
What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be using 
the where clause to identify the existing row?
 
  
 
Thanks,
 
Angel
 



Sent from Yahoo Mail for iPhone
 

Re: Update/where statement Adds Row

[A]

Good idea. Tried that and it doesn’t add anything to the existing table, which 
exists


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On Wednesday, September 11, 2019, 9:08 PM, JOHN, BIBIN  wrote:

#yiv9726893009 #yiv9726893009 -- _filtered #yiv9726893009 {panose-1:2 4 5 3 5 4 
6 3 2 4;} _filtered #yiv9726893009 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 
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Use if exists clause.
 
  
 
UPDATE table
 
SET column ='something'
 
WHERE key = ‘value’ IF EXISTS;
 
  
 
  
 
  
 
  
 
  
 
From: A  
Sent: Wednesday, September 11, 2019 11:05 PM
To: User cassandra.apache.org 
Subject: Update/where statement Adds Row
 
  
 
I have an update statement that has a where clause with the primary key 
(email,companyid).
 
  
 
When executed it always creates a new row. It’s like it’s not finding the 
existing row with the primary key.
 
  
 
I’m using Cassandra-driver.
 
  
 
What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be using 
the where clause to identify the existing row?
 
  
 
Thanks,
 
Angel
 



Sent from Yahoo Mail for iPhone
 

RE: Update/where statement Adds Row

[JOHN, BIBIN]

Use if exists clause.

UPDATE table
SET column ='something'
WHERE key = ‘value’ IF EXISTS;





From: A 
Sent: Wednesday, September 11, 2019 11:05 PM
To: User cassandra.apache.org 
Subject: Update/where statement Adds Row

I have an update statement that has a where clause with the primary key 
(email,companyid).

When executed it always creates a new row. It’s like it’s not finding the 
existing row with the primary key.

I’m using Cassandra-driver.

What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be using 
the where clause to identify the existing row?

Thanks,
Angel



Sent from Yahoo Mail for 
iPhone<https://urldefense.proofpoint.com/v2/url?u=https-3A__overview.mail.yahoo.com_-3F.src-3DiOS=DwMFaQ=LFYZ-o9_HUMeMTSQicvjIg=eFshZuDXOwvmW_UjVcAH8Q=FgFsGQLanA1ngbbLdQ2MKd0wBFNiXHtKVDZIEi2z_Qk=ZTUXV9cgMyKnreKaza7UCRQTtJjk_iygFCPGYX5X1es=>

Update/where statement Adds Row

[A]

I have an update statement that has a where clause with the primary key 
(email,companyid).
When executed it always creates a new row. It’s like it’s not finding the 
existing row with the primary key.
I’m using Cassandra-driver.
What am I doing wrong? I don’t want a new row. Why doesn’t it seem to be using 
the where clause to identify the existing row?
Thanks,Angel


Sent from Yahoo Mail for iPhone