[Firebird-devel] [FB-Tracker] Created: (CORE-4310) DateAdd(): change input argument from INT to BIGINT

2014-01-02 Thread Pavel Zotov (JIRA)
DateAdd(): change input argument from INT to BIGINT Key: CORE-4310 URL: http://tracker.firebirdsql.org/browse/CORE-4310 Project: Firebird Core Issue Type: Improvement Co

[Firebird-devel] Some aspects of the optimizer hints

2014-01-02 Thread Dmitry Yemanov
All, We had this topic raising from time to time, resulted in CORE-1488. So far there was no appropriate discussion and hence no decision made, although one might argue that the optimizer should be clever enough to make hints unnecessary. The PGSQL guys share the same opinion, BTW ;-) As for m

[Firebird-devel] ADO.NET provider for Firebird 4.1.0.0 is ready

2014-01-02 Thread Jiri Cincura
More info with firebirdsql.org download links on http://blog.cincura.net/233434-ado-net-provider-for-firebird-4-1-0-0-is-ready/ . Changes in tracker: http://tracker.firebirdsql.org/secure/ReleaseNote.jspa?version=10583&styleName=Text&projectId=10003 . JC -- Jiri {x2} Cincura (x2develop.com foun

Re: [Firebird-devel] Some aspects of the optimizer hints

2014-01-02 Thread Simonov Denis
Dmitry Yemanov писал(а) в своём письме Thu, 02 Jan 2014 15:55:57 +0400: > > This makes it necessary to allow the FIRST ROWS mode when it's needed. > I'm proposing the following: > > 1) FIRST ROWS mode is implicitly used when the FIRST / ROWS clause is in > game. Also, FIRST ROWS mode is implic

[Firebird-devel] [FB-Tracker] Created: (CORE-4311) Provileges

2014-01-02 Thread Kevin Smith (JIRA)
Provileges -- Key: CORE-4311 URL: http://tracker.firebirdsql.org/browse/CORE-4311 Project: Firebird Core Issue Type: Improvement Components: Engine Affects Versions: 2.5.2, 2.1.5, 2.5.1, 2.1.4, 2.5.0, 2.1.3, 2.1.2, 2.1.

Re: [Firebird-devel] Some aspects of the optimizer hints

2014-01-02 Thread Mark Rotteveel
On 2-1-2014 12:55, Dmitry Yemanov wrote: > The good question is how Firebird behaves now from this point of view. > Mostly it uses the ALL ROWS approach, and the underlying cost based > optimization algorithms also deal with complete stream cardinalities. > There are some heuristics based deviation

Re: [Firebird-devel] Some aspects of the optimizer hints

2014-01-02 Thread Jim Starkey
On 1/2/2014 8:10 AM, Simonov Denis wrote: > Dmitry Yemanov писал(а) в своём письме Thu, 02 Jan > 2014 15:55:57 +0400: > > >> This makes it necessary to allow the FIRST ROWS mode when it's needed. >> I'm proposing the following: >> >> 1) FIRST ROWS mode is implicitly used when the FIRST / ROWS clau

Re: [Firebird-devel] Some aspects of the optimizer hints

2014-01-02 Thread Dmitry Yemanov
02.01.2014 21:43, Mark Rotteveel wrote: > > It would be interesting to know which is better for performance, given > isc_dsql_fetch, a FIRST (x) ROWS might perform better when small fetch > sizes are used. What do you mean by "small fetch sizes"? If it's about incomplete fetch, i.e. only few row