FWD » Core Development » Database

12/31/2012

08:15 AM Feature #1580: upgrade Hibernate to latest level

1. About NPE in suggestNextVendorNumber: strange, but if we use a PreparedStatement which returns a ResultSet in do(R... Stanislav Lomany

12/28/2012

11:58 AM Feature #1910: add schema conversion support for sequences

This note is somewhere at the border between sequence conversion and runtime.
I tried to add the H2 database support... Ovidiu Maxiniuc

09:30 AM Feature #1580: upgrade Hibernate to latest level

1.
> Please be careful in making any changes to code which initializes collections; I originally tried to make the ... Stanislav Lomany

12/26/2012

01:06 PM Feature #1580: upgrade Hibernate to latest level

> What version of QaVendorUtils are you using? There is no ResultSet.close() call at line 269 in my version (004). ... Stanislav Lomany

12:16 PM Feature #1580: upgrade Hibernate to latest level

Stanislav Lomany wrote:
> 1. Reproduction: F - V - A
> ... Eric Faulhaber

12:07 PM Feature #1580: upgrade Hibernate to latest level

Please be careful in making any changes to code which initializes collections; I originally tried to make the initia... Eric Faulhaber

08:16 AM Feature #1580: upgrade Hibernate to latest level

> OK, let's try it. Can you think of an easy (generic) way to determine when an entity has a collection, or do you p... Stanislav Lomany

12/21/2012

12:54 PM Feature #1660: add conversion and runtime support for OF keyword use in a CAN-FIND

I still need to review customer reports to determine actual scenarios, but please start with some basic use cases. Eric Faulhaber

12:35 PM Feature #1910: add schema conversion support for sequences

I have merged the 1214a update with my local changes and tested a real-world database import with sequences. I found... Eric Faulhaber

12:19 PM Feature #1663: test/debug case-sensitive field support

This task is about defining temporary and permanent database tables with a mix of case-sensitive and case-insensitive... Eric Faulhaber

09:40 AM Feature #1580: upgrade Hibernate to latest level

OK, let's try it. Can you think of an easy (generic) way to determine when an entity has a collection, or do you pro... Eric Faulhaber

04:41 AM Feature #1580: upgrade Hibernate to latest level

Eric, the snippet represents the process of deletion and the following rollback of an entity in P2J (during rollback ... Stanislav Lomany

12/20/2012

06:28 PM Feature #1910: add schema conversion support for sequences

Code review 1214a:
Is the version of SequenceManager.java in this update the correct one? It doesn't compile. Fi... Eric Faulhaber

05:28 PM Feature #1580: upgrade Hibernate to latest level

PS: see the stacktrace in the #1566 bug. Constantin Asofiei

05:26 PM Feature #1580: upgrade Hibernate to latest level

Stas/Eric, just a thought: do you see the "Found two representations of same collection" issue any way related to the... Constantin Asofiei

05:07 PM Feature #1580: upgrade Hibernate to latest level

Sorry, I don't understand what your workaround example is trying to accomplish. What use case in P2J does this repre... Eric Faulhaber

06:23 AM Feature #1580: upgrade Hibernate to latest level

In order to reproduce the "Found two representations of same collection" issue the following Hibernate command sequen... Stanislav Lomany

08:45 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

The keyword is specified in the schema (.df file) as an option on a field:... Greg Shah

12/19/2012

05:59 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

I read about this option, but I found no examples of it's using. Maybe it depends on 4GL version?
Syntax like
..... Vadim Nebogatov

04:35 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Progress uses the keyword MANDATORY to denote a non-nullable field.
Thanks,
Eric Vadim Nebogatov

04:34 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Reading and investigation of Progress 4GL documentation as regards not-nullable fields. I did not find any field opti... Vadim Nebogatov

12/18/2012

05:50 PM Feature #1926: create an en_GB@p2j_basic locale definition

Here is the information screen for the @<db_name>@ database on windev01 from the Data Administration --> Utilities --... Eric Faulhaber

12:47 PM Feature #1580: upgrade Hibernate to latest level

1. Found two representations of same collection -- a day, may be two to find the cause and make a solution
2. Sessio... Stanislav Lomany

11:39 AM Feature #1580: upgrade Hibernate to latest level

Please summarize the current status of all known issues with this task and estimate (if you can) how much effort you ... Eric Faulhaber

12/17/2012

06:02 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Variant above does not require aliases mapping because argument type is calculated in HQLPreprocessor.
I made one m... Vadim Nebogatov

08:23 AM Feature #1580: upgrade Hibernate to latest level

Testcase for the "Found two representations of same collection" issue:... Stanislav Lomany

12/15/2012

05:21 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Approach described above is implemented, it works and on testing now.
But I have found one more problem.
If where... Vadim Nebogatov

12/14/2012

01:49 PM Feature #1580: upgrade Hibernate to latest level

> Did this behavior change from 3.0.5?
Yes, 3.0.5 just checks if there is the entity in the persistence context (reg... Stanislav Lomany

01:13 PM Feature #1580: upgrade Hibernate to latest level

Stanislav Lomany wrote:
> The "crossReferenceItem already exists with" issue is about Session.contains function. In ... Eric Faulhaber

06:42 AM Feature #1580: upgrade Hibernate to latest level

The "crossReferenceItem already exists with" issue is about Session.contains function. In Hibernate 4 it returns FALS... Stanislav Lomany

01:46 PM Feature #1911: add runtime support for sequences

Ovidiu Maxiniuc wrote:
> ...The fact is, this is the exact way PostgreSQL handles sequences and this should be a goo... Eric Faulhaber

11:21 AM Feature #1911: add runtime support for sequences

I have discovered something at least interesting today. The Progress/4GL 9 and OpenEdge/ABL 11 Reference books, both ... Ovidiu Maxiniuc

12:15 PM Feature #1910: add schema conversion support for sequences

As I created a new test case file for sequences I discovered that the @Sequencemanager.setValue()@ set of overloaded ... Ovidiu Maxiniuc

07:25 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

I understood the reason of problem with nested SQL Functions invocation (NPE on parsing SQL Function argument time): ... Vadim Nebogatov

12/13/2012

12:21 PM Feature #1926: create an en_GB@p2j_basic locale definition

I have done a first cut of this as described above, but I'm pretty sure it's not quite right yet.
I exported the c... Eric Faulhaber

12/12/2012

05:11 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Some tests are attached and passed as expected.
Now I am working with tests containing nested sql functions - not a... Vadim Nebogatov

12/11/2012

04:44 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

I have attached SQL Functions I am going to test now. Sorry, there are no proper comments and formatting just because... Vadim Nebogatov

12:05 PM Feature #1910: add schema conversion support for sequences

Ovidiu Maxiniuc wrote:
> The @_seqvals.d@ is indeed the default filename for exported sequence values. I documented ... Eric Faulhaber

11:29 AM Feature #1910: add schema conversion support for sequences

Changes in today's update:
* @src@ directory structure fixed
* @dbimport@ replaced @seqimp@
* fixed indentation/al... Ovidiu Maxiniuc

12/10/2012

02:34 PM Feature #1580: upgrade Hibernate to latest level

About "Found two representations"-related issues:
1. In the first issue ("crossReferenceItem already exists with") p... Stanislav Lomany

02:19 PM Feature #1910: add schema conversion support for sequences

After you finish with the code changes resulting from the above code reviews, please review all places in the P2J Con... Eric Faulhaber

02:12 PM Feature #1910: add schema conversion support for sequences

Code review 1210b:
* Nice work! I'm excited to give this a test run with a real database.
* Is _seqvals.d a hard... Eric Faulhaber

01:38 PM Feature #1910 (WIP): add schema conversion support for sequences

Eric Faulhaber

01:38 PM Feature #1910: add schema conversion support for sequences

Code review 1210a:
Please note that the following files in your zip file:... Eric Faulhaber

11:11 AM Feature #1910 (Review): add schema conversion support for sequences

Added sequence current value import Ovidiu Maxiniuc

06:59 AM Feature #1910: add schema conversion support for sequences

Moved the generation of sequence ddl from .schema to .p2o file. Ovidiu Maxiniuc

11:37 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Vadim Nebogatov wrote:
> The arguments passed to SQLFunction are strings; we can parse them separately to Ast tree l... Eric Faulhaber

12/08/2012

01:40 AM Feature #1580: upgrade Hibernate to latest level

> Yes, this needs to be fixed, but I'm not sure what the issue is here. In build.xml, we copy the ehcache configurat... Stanislav Lomany

12/07/2012

05:26 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

The arguments passed to SQLFunction are strings; we can parse them separately to Ast tree like method parse() does:
... Vadim Nebogatov

12:50 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Vadim Nebogatov wrote:
> I tried to find out also how to simplify first approach for constant expressions and for no... Eric Faulhaber

02:48 PM Feature #1581: add conversion and runtime support for certain metadata constructs

Discussed with Greg. Probably the best approach is to use an embedded H2 database to provide access to these metadat... Eric Faulhaber

01:54 PM Feature #1583: add conversion and runtime support for the INSERT language statement

Code looks good, but I should not have suggested that this go into post-parse fixups. This is too early, and it will... Eric Faulhaber

01:01 PM Feature #1580: upgrade Hibernate to latest level

Stanislav Lomany wrote:
> 6. "(net.sf.ehcache.config.ConfigurationFactory:WARNING) No configuration found. Configuri... Eric Faulhaber

12:29 AM Feature #1580: upgrade Hibernate to latest level

I'm not so sure this behavior is about an unstable release. But I think you are right that the select statement is p... Eric Faulhaber

12/06/2012

10:28 AM Feature #1910: add schema conversion support for sequences

Please make this issue your highest priority (including the import of current sequence values). We need to deliver a ... Eric Faulhaber

10:23 AM Feature #1910: add schema conversion support for sequences

Taking into consideration that the rules are more or less the same, a couple of hours should be enough to move the so... Ovidiu Maxiniuc

09:53 AM Feature #1910: add schema conversion support for sequences

I'm sorry, but in my review of your initial updates, I didn't notice that you were generating the sequence DDL from t... Eric Faulhaber

02:35 AM Feature #1910: add schema conversion support for sequences

I observed yesterday that the converted data dictionary file .p2o does not contains any reference to the sequence. Th... Ovidiu Maxiniuc

08:57 AM Feature #1580: upgrade Hibernate to latest level

About "Found two representations". After I've inserted the following code right after deletion of the target item the... Stanislav Lomany

02:09 AM Feature #1580: upgrade Hibernate to latest level

> Good work on finding a reliable recreate. Please open a new bug issue in the database project for this error, but ... Stanislav Lomany

12/05/2012

04:20 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

I also think it is hard to predict now how will SQLFunction approch affect caching and performance. I hope not very m... Vadim Nebogatov

02:39 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

As far as when to do it, I would say to do a quick and dirty test soon if possible. You want to know now if there is... Greg Shah

02:00 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

AFAIK, we have not done any work to determine the potential performance penalty.
We will have to look at some typi... Eric Faulhaber

01:28 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Eric: my questions were not related to the potential worry that you have about performance issues. I was fully aware... Greg Shah

02:15 PM Feature #1580: upgrade Hibernate to latest level

Good work on finding a reliable recreate. Please open a new bug issue in the database project for this error, but do... Eric Faulhaber

10:57 AM Feature #1580: upgrade Hibernate to latest level

About... Stanislav Lomany

11:51 AM Feature #1911: add runtime support for sequences

I spoke with Greg about this and he suggested a much more efficient (and simpler) solution:
Add flags to the direc... Eric Faulhaber

12/04/2012

06:05 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Investigation SQLFunctions processing in Hibernate&Antlr source code. SqlGenerator invokes SQLFunction.render() metho... Vadim Nebogatov

12:29 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Greg Shah wrote:
> Did I miss this?
Apparently, yes, you missed the post (# 49) where I voiced my concern about p... Eric Faulhaber

12:14 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Greg Shah wrote:
> I didn't realize that we already had eq and ne. When are they used? I previously thought that w... Eric Faulhaber

08:23 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Did I miss this? Is there a performance penalty to using the SQLFunction approach?
Also, what is the performance ... Greg Shah

08:22 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

equals and not_equals seem fine to me.
I didn't realize that we already had eq and ne. When are they used? I pre... Greg Shah

12:23 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Eric Faulhaber wrote:
> ...or even @eq@ and @neq@?
I just remembered @eq@ and @ne@ already are user defined funct... Eric Faulhaber

12:13 AM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

OK, it appears you have determined the SQLFunction approach is feasible. Let's go with it and see how it performs. ... Eric Faulhaber

01:43 AM Feature #1911: add runtime support for sequences

The implementation a service thread for handling sequence primitives (current/next/set) like this:
- the current val... Ovidiu Maxiniuc

12/03/2012

04:54 PM Bug #18: issues with ne/equal and true/false conversion in WHERE clauses

Concerning Example 3:
I tested with H2 database: for case f1=true, f2=true expression
(tt.f1 != true and tt.f2... Vadim Nebogatov

01:23 PM Feature #1580: upgrade Hibernate to latest level

OK, it sounds like caching the Hibernation Configuration objects by schema is no longer a safe thing to do with this ... Eric Faulhaber

01:05 PM Feature #1580: upgrade Hibernate to latest level

> What "type" resource was scoped to one SessionFactory that is now being scoped to another? In other words, what re... Stanislav Lomany

12:06 PM Feature #1580: upgrade Hibernate to latest level

Stanislav Lomany wrote:
> ... Eric Faulhaber

09:44 AM Feature #1580: upgrade Hibernate to latest level

>The root cause might be because the ConnectionManager.local.cleanup is executed before the Persistence.Context.clean... Stanislav Lomany

08:56 AM Feature #1580: upgrade Hibernate to latest level

> 3. "error closing Hibernate session" is caused by fact that the session with a remote database is closed on applica... Constantin Asofiei

05:57 AM Feature #1580: upgrade Hibernate to latest level

Warning that appears when multiple servers are executed on the same machine:... Stanislav Lomany

05:53 AM Feature #1580: upgrade Hibernate to latest level

1.... Stanislav Lomany

12/02/2012

06:21 AM Feature #1580: upgrade Hibernate to latest level

The following issue:... Stanislav Lomany