Re: [pgadmin-hackers] [pgAdmin4][Patch]: RM1840 - cannot create gistindex due to enforced ASC, DESC options in generated SQL

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От Surinder Kumar
Тема Re: [pgadmin-hackers] [pgAdmin4][Patch]: RM1840 - cannot create gistindex due to enforced ASC, DESC options in generated SQL
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Msg-id CAM5-9D91tXWjTt0AEzOyUbukmSMw9QA9+xoav7caddY_ig0C7w@mail.gmail.com
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Ответ на Re: [pgadmin-hackers] [pgAdmin4][Patch]: RM1840 - cannot create gistindex due to enforced ASC, DESC options in generated SQL  (Dave Page <dpage@pgadmin.org>)
Ответы Re: [pgadmin-hackers] [pgAdmin4][Patch]: RM1840 - cannot create gistindex due to enforced ASC, DESC options in generated SQL  (Dave Page <dpage@pgadmin.org>)
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Hi Dave,

The last patch was for exclusion constraint only. The same issue issue is reported RM2061 for index. 
So, this patch takes care of both issues.

Added a flag 'is_sort_nulls_applicable' which is set to true for access method 'btree'.
If its is true, the values for options 'ASC/DESC' and 'NULLS' are included in 'create' sql for exclusion and index otherwise not.

Please find updated patch and review.

On Tue, Jan 17, 2017 at 3:43 PM, Dave Page <dpage@pgadmin.org> wrote:
Hi

On Tue, Jan 17, 2017 at 9:52 AM, Surinder Kumar
<surinder.kumar@enterprisedb.com> wrote:
> Hi
> On Tue, Jan 17, 2017 at 3:08 PM, Dave Page <dpage@pgadmin.org> wrote:
>>
>> Hi
>>
>> On Fri, Jan 13, 2017 at 6:50 AM, Surinder Kumar
>> <surinder.kumar@enterprisedb.com> wrote:
>> > Hi
>> >
>> > Please find updated patch following changes:
>> > 1) Keep field 'opclass' combo box enabled.
>>
>> That doesn't seem to be working.
​It is now fixed in the updated patch.​
>
> Is the field 'opclass' is not enabled for you?.

No.

> Can you please tell in which scenario it doesn't gets enabled? so that I can
> fix it.

PostgreSQL 9.4, table:

CREATE TABLE public.foo
(
    id text COLLATE pg_catalog."default" NOT NULL,
    data1 text COLLATE pg_catalog."default",
    CONSTRAINT foo_pkey1 PRIMARY KEY (id),
    CONSTRAINT gerp1 UNIQUE (id, data1)
)

1) Right-click, Create index

2) Name: xxxx

3) Access method: gist

4) Add column. Select id (note the opclass field is not enabled)

5) Add column. Select data1 (note the opclass field is not enabled).

6) Click save, and behold the following error in all it's glory :-)

ERROR: data type text has no default operator class for access method "gist"
HINT: You must specify an operator class for the index or define a
default operator class for the data type.​
​Thanks for steps.​

--
Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake

EnterpriseDB UK: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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