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Seems bug with DISTINCT [CORE1250] #1674

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firebird-automations opened this issue May 8, 2007 · 6 comments
Closed

Seems bug with DISTINCT [CORE1250] #1674

firebird-automations opened this issue May 8, 2007 · 6 comments
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affect-version: 2.1 Alpha 1 priority: major resolution: wontfix type: bug

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Submitted by: Alexander Tyutik (tut)

Try to run next query :

select distinct A.RDB$CONSTRAINT_NAME,
A.RDB$CONSTRAINT_TYPE,
A.RDB$RELATION_NAME,
C.RDB$TRIGGER_SOURCE,
D.RDB$DEPENDED_ON_NAME
from RDB$RELATION_CONSTRAINTS A, RDB$CHECK_CONSTRAINTS B, RDB$TRIGGERS C, RDB$DEPENDENCIES D
order by A.RDB$RELATION_NAME, A.RDB$CONSTRAINT_NAME

and i've got an error:

Unsuccessful execution caused by system error that does not preclude successful execution of subsequent statements.
Datatype BLOB is not supported for sorting operation.
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Commented by: Alexander Tyutik (tut)

Here is simplier query:

select distinct RDB$TRIGGER_SOURCE from RDB$TRIGGERS

P.S. RDB$TRIGGER_SOURCE is of type BLOB SUB_TYPE TEXT CHARACTER SET UNICODE_FSS

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Commented by: @dyemanov

DISTINCT operation is performed using an external sort. As blobs cannot be sorted by, you get the mentioned error. This is by design.

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Commented by: Alexander Tyutik (tut)

Maybe it is possible to generate other error with other message for such case?

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Modified by: @dyemanov

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Won't Fix [ 2 ]

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Modified by: @pcisar

status: Resolved [ 5 ] => Closed [ 6 ]

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Modified by: @pcisar

Workflow: jira [ 12051 ] => Firebird [ 15556 ]

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affect-version: 2.1 Alpha 1 priority: major resolution: wontfix type: bug
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