IN-OUT Parameters, Arrays, ....

• New initialization property "free_threading" is used for decision of problems of test of connection in "Data Link" dialogue.
• The change of position of cursor of sequential access with the process of error handling of positioning through bookmarks was detected.
• ^new! Support of "CREATE DATABASE ..." enquiry. It enquiry is possible for direct interaction of IBP only, because OLEDB specification do not allow execution of command for data source without initialization.
• ^new! Support of "DROP DATABASE" enquiry. The command execution work via call of isc_drop_database. Not tested in ADO.
• ^new! Full IN-OUT parameters support.
• The leakage of resources in case of breakdown of execution of enquiry with parameters was precluded. For this the copying of IN-parameters was done. You must remember it in case of passing of data for writing of BLOB without using of storage-objects. For the time being for arrays the duplication are inevitable. The copying is a temporary way. In the next version the copying will be excluded.
• Support of convertion the type VT_CY to the types DBTYPE_I8 and DBTYPE_UI8
• Error with zero column of bookmarks. The arguments sizeof(LONG) and DBTYPE_I4 was confused. It was interpreted as DBTYPE_R4 and 3 bytes. It don't make the crash, because the specification demand equalize it to a size divisible by number of digits of processor.
• The problems of reading BLOB fields via ADO Express are fixed. Thanks Juris Gekiss for nudging to the decision of this problem and composition of the list of other errors of IBProvider.
• The check of descriptions of parameters which user directly defined (ADODB.Command.Parameters.Append) was optimized. The main point is binary search in sorted table of types names.
• ^new! Support of arrays. We agree with general opinion that arrays are not native type of IB. Nevertheless read/write operations with arrays were realized by us more or less transparent.
  
  • The OLEDB arrays present as SAFEARRAY. It is the standard method of storage of arrays in Visual Basic.
  • IBProvider convert the elements of arrays to Visual Basic compatible types automatically, since SAFEARRAY can't keep information about types different from VARIANT compatible types. The new properties of connection string (array_vt_type) are answered for this conversion. Default value is true.
• If you transfer arrays as IN parameter then information about names of table and column for inserting of array descriptor are needed. The IB API function isc_dsql_describe_bind don't return descriptions of IN parameters. The FireBird developers understood sense of this problem, and maybe they will correct it. The FireBird developers understood sense of this problem, and maybe they will correct it, but for IB4/IB5 users it senselessly. Therefore the method of parameters presentation in enquiry text was extended. Namely, you may define parameters as:
  
  1. ?
  2. :param_name
  3. ?. table_name.column_name
  4. :param_name. table_name.column_name
  Where table_name and column_name can be quoted names of third dialect. Second and third parts of parameter are used for inner work, and in the case of automatic generation of the list of parameters (ADODB.Command.Parameters.Refresh) aren't shown outside.
  During "INSERT ..." or "UPDATE ..." commands execution the error will be arisen if additional information has error.
• IBProvider allow to write subset of elements of array.
• You must keep in mind that "UPDATE ..." command write over the old data.
• The CHAR elements of array are kept as usually, with terminal spaces. IBProvider returns the rtrim(element of array).
• VARCHAR is kept as C-string, i.e. 0-terminal string. IBProvider don't use other specific symbols (e.g. '\n') for marking the end of string, therefore the strings with 0-symbol aren't kept in arrays.
• InterBase don't allow to use arrays as arguments of stored procedures.
• In ADO Express opening of set containing arrays lead to AV. It arise before loading.

Nevertheless it not more difficult than work with BLOB fields. Tasks for using it at once are found how its possibility appeared.

Look at the examples of arrays using.

At least owing to realization of this support we done the next step to improvement of IBP.

• The current version of IPBrovider is 1.5.0.42. In the properties of file of trial version is specified - [TRIAL]
• The trial version limitation:
  • The 16-bit cache of rowset. In the commercial version it is 32-bit.
  • 32-bit access to the temporary file. In the commercial version it is 64-bit.
  • Harsh limitation of time of work.
• The size of debug version is more than 1 Mb. The size of commercial version is 549Kb.

We give you a chance for a free learning of low-level library for interaction with gds32.dll. In particular you can learn the technology of work with arrays. What is the farther plans? We plan carrying on the works with IBProvider, but because of various technical hardships the speed of headway not such as we wants. In particular we know the method of stoppage of memory consumption for all modes of work with result set, but it implementation require non-trivial efforts of programming. Similarly about updatable sets. But it only matter of time.

All

Publish date: 2001-08-30. Copyright: IBProvider. This material may be reproduced on other web sites, without written permission but link to http://www.ibprovider.com required. Printable version: IN-OUT Parameters, Arrays, ....

All IBProvider news:

2011-11-15 The new IBProvider 3.9.4 improves compatibility with .NET. Fixed known bugs. 2011-09-23 New IBProvider v3.9.1 become more faster. 2011-08-22 The new version of IBProvider v.3.9 is delivered with the warranty(!) of stable performance within systems operating around the clock. 2011-06-07 IBProvider v3.8.2. Are your data access components ready for Firebird 3? 2011-05-11 IBProvider v3.8. UDF in metadata schemas. Configuring of transaction isolation parameters. New "Free". 2011-04-03 IBProvider v3.7. Support for BOOLEAN [Firebird v3]. 2011-03-03 IBProvider v3.6. New interfaces for rowset and new metadata schema. 2011-02-14 IBProvider v3.5. Support for Firebird 2.5.1. Automatic generation of SQL queries has been improved. Support for parameters in SQL scripts. 2011-01-14 4 key distinctions of the new IBProvider v3.4 that make your applications faster 2010-12-18 In the new IBProvider version, we introduced support of the BASE64 charset of InterBase XE, improved algorithms, reduced requirements to memory and corrected errors 2010-11-16 Do you want to enable execution of SQL scripts in your programs and spend less time for exhausting coding? 2010-11-11 Do you want to receive the full-featured IBProvider 64/32? Participate in our contest! 2010-10-20 Do you use TIME and TIMESTAMP in your applications? The new IBProvider version will further simplify your work! 2010-09-16 The new IBProvider version has a new interface and can work correctly with case-dependent names of database objects via MS SQL. 2010-08-26 Download the final build of IBProvider Professional v3(!). 2010-07-08 New IBProvider Professional v3 RC5 that supports updatable rowsets is now available. 2010-06-11 Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done. 2010-05-07 New IBProvider 3.0.0.9496 RC4 release appeared. Query parameters parsing and COM-locking was updated. 2010-04-19 Changes in SQL-parser. Support for SQLSTATE and NativeError. 2010-03-15 Three Reasons Why You Should Upgrade to the New IBProvider 2010-02-14 Be quick to get a free license for IBProvider Professional v.3.0.00.8628 2010-01-18 Today, on January 18, 2010, IBProvider celebrates its 10th anniversary. The grand banquet is preceded by the release of the latest IBProvider version with enhanced support of DDL and updatable rowsets. 2009-12-15 We have improved PROCEDURES scheme loaders to obtain the text of stored procedures in PROCEDURE_DEFINITION. 2009-11-16 Performance of the new IBProvider increased by 4.5 times 2009-10-07 IBProvider 3.0.0.7798. The work with large volumes of data was improved. 2009-08-13 New IBProvider 3.0.0.7575 with queries pool and enhanced working with Delphi. 2009-07-10 IBProvider now supports free ways of NULL-processing. 2009-07-04 New IBProvider version can emulate BOOLEAN and GUID types when working with Firebird and Interbase. 2009-06-11 New IBProvider version has the option of cancelling commands execution and supports the new type of Firebird 2.5 queries containing SQL_NULL. 2009-05-05 The option of working with TIME type via MS SQL Linked Server. 2009-04-17 16 versions of Firebird and Interbase are now available for recording on 64-bit platforms via MS SQL Linked Server. 2009-03-05 IBProvider v3 Release Candidate 4 with enhanced DDEX support and optimized working with nominated parameters. Metadata can now be accessed in user encoding. 2009-02-16 New IBProvider allows comprehensive work in Unicode applications, enhanced work with NONE encoding, and supports charset markers. 2009-01-12 The brand new mechanism has been developed in IBProvider v3 for working with Firebird and Interbase text data charsets. 2008-11-06 New IBProvider - support of 49 code pages, ability to work without provider registering, prevention of memory leaks in Firebird client. 2008-10-03 In the new edition of IBProvider Professional 7 codepages support was implemented, bugs were fixed, BLOB-fields access and memory management was improved 2008-08-25 The 6 world-wide Firebird Conference in Bergamo, Italy 2008-07-30 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. 2008-07-08 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. 2008-06-17 IBProvider releases have appeared. OCTETS character set support, data type converter release, 64 bits values in metadata schematics. 2008-05-12 IBProvider releases have appeared. New implementation of the data types converter. 2008-04-07 New IBProvider v3 for 64 bits operational systems. 2008-03-11 New build No 3965 of IBProvider v 3.0 RC2 has appeared. 2008-02-08 Visual Studio 2008 support was improved, work with DTC was corrected, known bugs were fixed and Firebird/Interbase compatibility was enhanced. 2007-12-26 We have changed the IBProvider license agreements and now give discounts. 2007-11-08 The second Russian Firebird and Interbase conference will take place in Moscow, November 23, 2007 2007-10-30 IBProvider Free Edition (3.0.0.3313 Release Candidate 2 [RC2]) has appeared. 2007-10-29 IBProvider v3 Release Candidate 2 (RC2) has appeared. 2007-10-18 New release of the IBProvider Professional Edition appears. We have improved Integration with Microsoft office and fixed known bugs. 2007-09-13 New providers versions in the Professional Edition now can be used with Microsoft SQL Server 2005 Business Intelligence Development Studio 2007-07-20 The latest editions of IBProvider Professional and IBProvider Free now support new features of Firebird 2.1 2007-05-25 Download engine now working. All customers will receive personal releases more quikly. 2007-04-27 The latest editions of IBProvider Professional and IBProvider Free are available for download. 2006-12-13 C++ client library for OLEDB providers now support the Unicode project types (which based on unicode strings). 2006-12-04 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. 2006-10-07 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. 2006-08-28 IBProvider 3.0.0.2065 [Beta]. IBProvider 2.4.7.2034 [Release]. MSSQL 2000/2005 integration improvement. 2006-08-13 IBProvider 3.0.0.1959 [Beta]. IBProvider 2.4.6.1989 [Release]. C++ library for OLEDB providers now support VC8 (VS2005) 2006-05-25 IBProvider 3.0.0.1324 [Beta]. IBProvider 2.4.5.1953 [Release]. Client Library for C++. 2006-05-05 IBProvider price will be changed after 23 may 2006. New demo versions are avalible 2006-03-30 IBProvider release v.2.4.4 (v.1.7.26) build 1885. IBProvider v.3 [build 1107 beta] 2006-02-27 IBProvider v.1/v.2 [build 1877 Release Candidate 1]. IBProvider v.3 [build 1062. beta] 2005-11-30 IBProvider 2.4.3.1859. Release. 2005-11-01 Fix of problem with arithmetic errors in .NET applications. 2005-09-28 IBProvider v3 [build 913] [beta version]. 2005-09-22 IBProvider v3 [build 890] [beta version]. IBProvider v2/v1 [build 1811]. 2005-09-01 The InterBase and Firebird Developer Magazine. 2005-07-28 IBProvider v3 [build 789] [beta version]. IBProvider v2/v1 [build 1802]. 2005-06-15 IBProvider v3 [build 779] [beta version]. IBProvider v2/v1 [build 1795]. 2005-04-12 IBProvider User Forum is Open 2005-03-22 IBProvider 2.4.2.1772. Release. 2005-02-28 IBProvider 3.0.0.639 beta. Change of the corporate license. 2005-02-11 IBProvider 3.0.0.573 beta. 2004-12-24 IBProvider 3.0.0.449 beta. 2004-11-12 IBProvider 2.4.1.1720/1.7.23.1720. Release. 2004-05-31 IBProvider 2.4.0.1607/1.7.22.1607. Release. 2004-05-14 Release Candidate 2.4.0.1588/1.7.22.1588 2004-04-30 Version 2.3.3.1523 beta 2004-03-29 Version 2.3.3.1416 beta 2003-12-17 Version 2.3.3.1300 2003-10-18 Version 2.3.2.1233 2003-08-22 Version 2.3.1.1184 2003-06-25 Version 2.3.0.1134 - extended support of MS AS, MS SQL 2003-04-23 Version 2.2.0.969 - Data Links dialog support, localization 2003-03-31 Version 2.1.2. 2003-03-26 Version 2.1.1. 2003-03-04 Version 2.1. The error processing mechanism is completely reconstructed. 2003-02-26 Discounts on IBProvider. 2003-02-18 Changes in License Terms 2003-01-23 Version 2.0.1.735. Bug fix, optimization, HTML help 2002-12-10 The second generation IBProvider 2002-11-21 Version 1.7.11.584 and 1.8.0.584 beta 2002-11-06 Version 1.7.10.542 and 1.8.0.542 beta 2002-10-20 Version 1.7.9.481 and 1.8.0.481 beta 2002-08-12 Version 1.7.6.350 and 1.8.0.350 beta 2002-07-30 Version 1.7.5.311 - Bugs fixing 2002-07-10 Version 1.7.4.289 2002-06-20 Version 1.7.3.269 2002-05-30 Version 1.7.2.255 2002-05-08 Version 1.7.1 2002-04-22 Version 1.7.0.227. Support of UNICODE. New prices. 2002-03-29 Version 1.6.3.213 2002-02-28 Version 1.6.2.201 2002-02-08 Version 1.6.2.199 2002-01-19 Version 1.6.1.185 2001-12-24 Free Version 1.5.2 2001-12-13 Version 1.6 2001-11-14 1.5.1 - Change of Compiler. Optimization. IColumnsRowset. etc. 2001-08-30 IN-OUT Parameters. Arrays. .... 2001-07-16 Error with test of connection in Data Links 2001-05-21 Support of stored procedure 2001-05-16 New samples on Delphi for MTS from Andrei Semak 2001-05-14 The final touches to RowSet 2001-04-30 Commercial release 2001-04-20 Support of DTC and Resource pooling 2001-04-04 Support for null-containing character in strings 2001-03-16 Implementaion of IOpenRowset::OpenRowset 2001-03-15 Support of DECIMAL and NUMERIC 2001-03-12 Errors correction... 2001-03-01 Fix bug in command prepare 2001-01-03 The main cardinal change is in accordance with implementation of operation auto-commit support. 2000-12-01 IBProvider and client library Reconstruction. 2000-09-15 New version of IBProvider for IB6.

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