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SUBSTRING on long blobs truncates result to 32767 if third argument not present [CORE3245] #3615

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firebird-issue-importer opened this issue Nov 18, 2010 · 4 comments

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@firebird-issue-importer

Submitted by: @paulvink

Is related to QA285

If the third argument is not present, SUBSTRING should return from <startpos> to the end of the string.

But with long text blobs, it returns a maximum of 32767 characters, as the following query demonstrates:

with q (s) as (
select cast(cast('abc' as char(32767)) as blob sub_type text)
|| cast('def' as char(32767))
|| cast('ghi' as char(32767))
|| 'jkl'
from rdb$database
),
r (sub_for, sub_nofor) as (
select substring(s from 8000 for 120000),
substring(s from 8000)
from q
)
select char_length(s), right(s, 3),
char_length(sub_for), right(sub_for, 3),
char_length(sub_nofor), right(sub_nofor, 3)
from q cross join r

The result is (98304, 'jkl', 90305, 'jkl', 32767, ' ').

Columns 5 and 6 should be the same as 3 and 4: 90305, 'jkl'.

Commits: e43425e c3f23b1 cb34e0c

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@firebird-issue-importer firebird-issue-importer commented Feb 2, 2011

Modified by: @dyemanov

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

resolution: Fixed [ 1 ]

Fix Version: 2.5.1 [ 10333 ]

Fix Version: 3.0 Alpha 1 [ 10331 ]

Fix Version: 2.1.5 [ 10420 ]

assignee: Dmitry Yemanov [ dimitr ]

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@firebird-issue-importer firebird-issue-importer commented Feb 23, 2011

Modified by: @pcisar

Link: This issue is related to QA285 [ QA285 ]

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@firebird-issue-importer firebird-issue-importer commented May 16, 2012

Modified by: @pmakowski

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

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@firebird-issue-importer firebird-issue-importer commented May 29, 2015

Modified by: @pavel-zotov

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

QA Status: Done successfully

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