On 11/09/2015 06:10, Jiří Činčura wrote:
> Hi,
>
> can somebody explain this behavior? Tested on FB 2.5.4 and 2.5.3 x64 SC.
>
> CREATE TABLE T_TRANSLATION_META (
>     F_TRM_ID           BIGINT NOT NULL,
>     F_TRM_CODE         VARCHAR(512) CHARACTER SET UTF8 NOT NULL COLLATE
>     UNICODE_CI
> );
> CREATE TABLE T_COUNTRY (
>     F_CNR_ID              BIGINT NOT NULL,
>     F_TRM_NAME_ID         BIGINT DEFAULT -1 NOT NULL,
>     CF_CNR_NAME           COMPUTED BY (((select
>     F_TRM_CODE
> from T_TRANSLATION_META
> where F_TRM_ID = F_TRM_NAME_ID)))
> );
>
> Now this returns `null` (RDB$5 is CF_CNR_NAME).
> select rdb$collation_id from rdb$fields where rdb$field_name = 'RDB$5'
>
> Now I later the above mentioned field to the same expression.
> ALTER TABLE T_COUNTRY ALTER CF_CNR_NAME COMPUTED BY (((select
>     F_TRM_CODE
> from T_TRANSLATION_META
> where F_TRM_ID = F_TRM_NAME_ID)));
>
> But now the query for rdb$collation_id returns 3. What the hell?

Some bug fixed (intentionally or not) in v3.


Adriano


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