Version 1.7.4.289

In the version

• All known at the current moment errors and inaccuracies associated with the data type conversion are removed.
• The support of Client Cursor Engine is improved.

Support of NUMERIC

In the foregoing versions when preparing the parameters of DBTYPE_NUMERIC (adNumeric) type there was used intermediate conversion into double. In this case the significant digits could be lost. Now there is used direct conversion into InterBase presentation of NUMERIC (integer + scale) taking into account the current dialect of connection. Conversion into double is used only if DBTYPE_NUMERIC contains the number, which cannot be represented in the form of integer + scale with using of INT32 (first dialect) or INT64 (third dialect).)

Corrections are extended both to usual NUMERIC parameters and parameters containing NUMERIC-arrays.

The loss of the precision of NUMERIC-data when reading was excluded from the very beginning (see version 1.6.1).

Take into consideration, that DBTYPE_NUMERIC is not the VARIANT-compatible data type. Therefore maybe to exclude completely the loss of the significant digits for ADODB is possible only through using of text presentation of the number.

Support of binary presentation and storage-objects

Now they can get and put any data in the form of DBTYPE_BYTES and storage-objects with the ISequentialStream interface. Including the elements of arrays. ISequentialStream was supported only for the BLOB fields previously.

In particular, Client Cursor Engine reads/puts VARCHAR(32000) as storage-object.

This support is accessible also in the client library of C++ classes for the work with OLEDB.

Query parameters control

The new properties of the initialization of the data source and command are added.

"auto_param_describe" property. If when executing the parameterized query the descriptions of the parameters were not defined, then the provider will form them automatically. Default value is true. If you want to verify the correctness of the work of your software, then this support can be set off.

"force_param_describe" property. Forced obtaining of description of the parameters. It ensures the transfer of the parameters values in that format, which server requires. In this case all load lies down on the type converter of IBProvider. Previously implicit obtaining of description of the parameters was made only for arrays. Default value is true.

As a result, for example, it is possible not to worry about the correct setting of the description of text BLOB fields, but to work with it as usual text fields. If in your data base there occurred change of the type from VARCHAR to BLOB or vice versa, then provider will correct independently the principle of the data setting. Note that at present data base server can only write VARCHAR in BLOB, but not backward.

Client Cursor Engine requires the support of this type, which interprets text fields of VARCAR(32000 type as MEMO.

If you form the correct descriptions of the parameters, then you can set this property in false. This excludes one additional access a server when executing the parameterized query first time (!).

"clear_param_info" property. IBProvider clears the list of the parameters descriptions when setting the new text of the query. However, if client sets the descriptions of the parameters firstly, and then the text of query, then information about the parameters will lost and provider inquires descriptions from the server (see auto_param_describe). This leads to the excess call of IB API and the possibility of the incorrect interpretation of the data presented as BYTES/storage-objects. Default value is true.

They can determine the sequence of the setting of the query text and description of the parameters through the special tracing provider version.

The loss of the user setting of the parameters description was observed when working with ADO.NET

Principle of execution of SP

In the foregoing versions of IBProvider there was added the new property of the initialization of the data source and command "std_exec_sp". This property determines how it is necessary to interpret query "exec SP" / "execute SP".

It is necessary to keep in mind that the description of the stored procedures in schema rowset describes SP with OUT-parameters independently from the value of std_exec_sp in the string of the initialization of the source.

Schema Rowset

Insignificant errors in the generation of the data sets are corrected. The possibility of data reading with the use of DBMEMOWNER_PROVIDEROWNED flag is provided, which decreases the traffic of the data movements between the client and provider to the minimum.

Rowset returned by IColumnsRowset

Support of DBMEMOWNER_PROVIDEROWNED

Unfortunately, at present DBMEMOWNER_PROVIDEROWNED is not supported for the sets with results of users queries to DB. It is explained by the fact that data are stored in specialized cache with the displacement of unusable rows into temporary file.

On this the basic work on errors can be considered final. Nevertheless, if exploitation will reveal serious deficiencies, then before version 1.8 intermediate build will be released.

All

Publish date: 10-07-2002. Copyright: IBProvider. This material may be reproduced on other web sites, without written permission but link to http://www.ibprovider.com required.

All IBProvider news:

03-10-2008 In the new edition of IBProvider Professional 7 codepages support was implemented, bugs were fixed, BLOB-fields access and memory management was improved 25-08-2008 The 6 world-wide Firebird Conference in Bergamo, Italy 30-07-2008 IBProvider updates are available. Operation with NUMERIC-types and connection pooling were improved. External and temporary tables support in metadata schemes was added. Disabled metadata cache mode performance was increased in 2.5 times. 08-07-2008 New IBProvider Release Candidate 3 is available. Support of the integrated Windows authentication (SSPI) for Firebird 2.1, Support of long names and BOOLEAN type in Interbase 7.x and Interbase 2007, etc. 17-06-2008 IBProvider releases have appeared. OCTETS character set support, data type converter release, 64 bits values in metadata schematics. 12-05-2008 IBProvider releases have appeared. New implementation of the data types converter. 07-04-2008 New IBProvider v3 for 64 bits operational systems. 11-03-2008 New build No 3965 of IBProvider v 3.0 RC2 has appeared. 08-02-2008 New IBProvider releases have appeared. Visual Studio 2008 support and DTC support were improved, known bugs were fixed and Firebird/Interbase compatibility was enhanced. 26-12-2007 We have changed the IBProvider license agreements and now give discounts. 08-11-2007 The second Russian Firebird and Interbase conference will take place in Moscow, November 23, 2007 30-10-2007 IBProvider Free Edition (3.0.0.3313 Release Candidate 2 [RC2]) has appeared. 29-10-2007 IBProvider v3 Release Candidate 2 (RC2) has appeared. 18-10-2007 New release of the IBProvider Professional Edition appears. We have improved Integration with Microsoft office and fixed known bugs. 13-09-2007 New providers versions in the Professional Edition now can be used with Microsoft SQL Server 2005 Business Intelligence Development Studio 20-07-2007 The latest editions of IBProvider Professional and IBProvider Free now support new features of Firebird 2.1 25-05-2007 Download engine now working. All customers will receive personal releases more quikly. 27-04-2007 The latest editions of IBProvider Professional and IBProvider Free are available for download. 13-12-2006 C++ client library for OLE DB-providers now support the Unicode project types (which based on unicode strings). 04-12-2006 New releases appear: IBProvider Professional Edition - is a professional developer kit for Interbase and Firebird. IBProvider Free Edition - is an absolutely free of charge and most powerful version based on the commercial core of IBProvider v3. 07-10-2006 IBProvider 3.0.0.2385 [RC1] and IBProvider 2.5.0.2088 [Release] now avaliable. New properties aliases: Charset, PSWD. Metadata reading algorithm and SQL parser was optimized. Supporting arrays in ADO .Net. 28-08-2006 IBProvider 3.0.0.2065 [Beta]. IBProvider 2.4.7.2034 [Release]. MSSQL 2000/2005 integration improvement. 13-08-2006 IBProvider 3.0.0.1959 [Beta]. IBProvider 2.4.6.1989 [Release]. Ñ++ library for OLEDB providers now support VC8 (VS2005) 25-05-2006 IBProvider 3.0.0.1324 [Beta]. IBProvider 2.4.5.1953 [Release]. Client Library for C++. 05-05-2006 IBProvider price will be changed after 23 may 2006. New demo versions are avalible 30-03-2006 IBProvider release v.2.4.4 (v.1.7.26) build 1885 now available. IBProvider v.3 [build 1107. beta] 27-02-2006 IBProvider v.1/v.2 [build 1877 Release Candidate 1]. IBProvider v.3 [build 1062. beta] 30-11-2005 IBProvider 2.4.3.1859. Release. 01-11-2005 Fix of problem with arithmetic errors in .NET applications. 28-09-2005 IBProvider v3 [build 913] [beta version]. 22-09-2005 IBProvider v3 [build 890] [beta version]. IBProvider v2/v1 [build 1811]. 01-09-2005 The InterBase and Firebird Developer Magazine. 28-07-2005 IBProvider v3 [build 789] [beta version]. IBProvider v2/v1 [build 1802]. 15-06-2005 IBProvider v3 [build 779] [beta version]. IBProvider v2/v1 [build 1795]. 12-04-2005 IBProvider User Forum is Open 22-03-2005 IBProvider 2.4.2.1772. Release. 28-02-2005 IBProvider 3.0.0.639 beta. Change of the corporate license. 11-02-2005 IBProvider 3.0.0.573 beta. 24-12-2004 IBProvider 3.0.0.449 beta. 12-11-2004 IBProvider 2.4.1.1720/1.7.23.1720. Release. 31-05-2004 IBProvider 2.4.0.1607/1.7.22.1607. Release. 14-05-2004 Release Candidate 2.4.0.1588/1.7.22.1588 30-04-2004 Version 2.3.3.1523 beta 29-03-2004 Version 2.3.3.1416 beta 17-12-2003 Version 2.3.3.1300 18-10-2003 Version 2.3.2.1233 22-08-2003 Version 2.3.1.1184 25-06-2003 Version 2.3.0.1134 - extended support of MS AS, MS SQL 23-04-2003 Version 2.2.0.969 - Data Links dialog support, localization 31-03-2003 Version 2.1.2. 26-03-2003 Version 2.1.1. 04-03-2003 Version 2.1. The error processing mechanism is completely reconstructed. 26-02-2003 Discounts on IBProvider. 18-02-2003 Changes in License Terms 23-01-2003 Version 2.0.1.735. Bug fix, optimization, HTML help 10-12-2002 The second generation IBProvider 21-11-2002 Version 1.7.11.584 and 1.8.0.584 beta 06-11-2002 Version 1.7.10.542 and 1.8.0.542 beta 20-10-2002 Version 1.7.9.481 and 1.8.0.481 beta 12-08-2002 Version 1.7.6.350 and 1.8.0.350 beta 30-07-2002 Version 1.7.5.311 - Bugs fixing 10-07-2002 Version 1.7.4.289 20-06-2002 Version 1.7.3.269 30-05-2002 Version 1.7.2.255 08-05-2002 Version 1.7.1 22-04-2002 Version 1.7.0.227. Support of UNICODE. New prices. 29-03-2002 Version 1.6.3.213 28-02-2002 Version 1.6.2.201 08-02-2002 Version 1.6.2.199 19-01-2002 Version 1.6.1.185 24-12-2001 Free Version 1.5.2 13-12-2001 Version 1.6 14-11-2001 1.5.1 - Change of Compiler. Optimization. IColumnsRowset. etc. 30-08-2001 IN-OUT Parameters. Arrays. .... 16-07-2001 Error with test of connection in Data Links 21-05-2001 Support of stored procedure 16-05-2001 New samples on Delphi for MTS from Andrei Semak 14-05-2001 The final touches to RowSet 30-04-2001 Commercial release 20-04-2001 Support of DTC and Resource pooling 04-04-2001 Support of null-containing character arrays 16-03-2001 Implementaion of IOpenRowset::OpenRowset 15-03-2001 Support of DECIMAL and NUMERIC 12-03-2001 Errors correction... 01-03-2001 Fix bug in command prepare 03-01-2001 The main cardinal change is in accordance with implementation of operation auto-commit support. 01-12-2000 IBProvider and client library Reconstruction. 15-09-2000 New version of IBProvider for IB6.

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