FreeTDS Development Group

[Igor Korot <ikorot01 AT gmail.com>]

Hi, Matthew,

On Mon, Jul 23, 2018 at 9:31 AM,  <matthew.green AT datamartcomputing.com> wrote:
> This works for me on 15.7:
>
> create table test (test int not null)
>
> declare @i varchar(8000)
>
> select @i = "create index I1 on test (test)"
>
> if not exists (select 1 from sysindexes where id = object_id("test") and 
> name = "I1")
>     exec(@i)

How many times did you run it?
When I tried to execute:

IF NOT EXISTS(SELECT o.name, i.name FROM tempdb..sysobjects o,
tempdb..sysindexes i WHERE o.id = i.id AND o.name='abcattbl' AND
i.name='abcattbl_tnam_ownr') EXECUTE("CREATE INDEX abcattbl_tnam_ownr
ON abcattbl(abt_tnam ASC, abt_ownr ASC)")

when the index already been created, I got:

"Could not SQLExecute"

And I have Sybase 16.0 installed on Linux Gentoo.
Tried the query on isql from unixODBC w/freeTDS driver.

Thank you.

>
> Cheers,
>
> Matt.
>
> July 23, 2018 3:02 PM, "Igor Korot" <ikorot01 AT gmail.com> wrote:
>
>> And following statement also fails:
>>
>> IF NOT EXISTS(SELECT o.name, i.name FROM tempdb..sysobjects o,
>> tempdb..sysindexes i WHERE o.id = i.id AND o.name='abcattbl' AND
>> i.name='abcattbl_tnam_ownr') EXECUTE("CREATE INDEX abcattbl_tnam_ownr
>> ON abcattbl(abt_tnam ASC, abt_ownr ASC)")
>>
>> "Could not SQLExecute"
>>
>> Log says "Index already exists"
>>
>> Thank you.
>>
>> On Mon, Jul 23, 2018 at 5:57 AM, Igor Korot <ikorot01 AT gmail.com> wrote:
>>
>>> Hi,
>>>
>>> On Mon, Jul 23, 2018 at 2:48 AM, Frediano Ziglio <freddy77 AT gmail.com> 
>>> wrote:
>>>> 2018-07-22 7:57 GMT+01:00 Igor Korot <ikorot01 AT gmail.com>:
>>>
>>> Hi, ALL,
>>> I'm trying to execute following query:
>>>
>>> query1 = L"IF NOT EXISTS(SELECT 1 FROM sysobjects WHERE name =
>>> 'abcatcol' AND type = 'U') CREATE TABLE abcatcol( <field_list>))";
>>>
>>> Unfortunately it fails.
>>> If the table does not exist I'm getting 100 (SQL_NO_DATA) from the ODBC
>>> driver.
>>> And if the table does exist, I'm getting -1 with the error:
>>>
>>> "The table already exists".
>>>
>>> Is there a way to do this in 1 shot? Or I will have to do a conditional
>>> for Sybase to make it in 2 queries?
>>>
>>> Please advise.
>>>
>>> Thank you.
>>>> This works for mssql:
>>>>
>>>> if object_id('test123') is null create table test123(i int)
>>>
>>> What about this one:
>>>
>>> CREATE INDEX IF NOT EXISTS abcattbl_tnam_ownr ON abcattbl(\"abt_tnam\"
>>> ASC, \"abt_ownr\" ASC)
>>>
>>> ?
>>>
>>> It is on Sybase 16.
>>> It says "Syntax error on the 'IF'".
>>>
>>> Thank you.
>>>
>>>> Frediano
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