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Delphi Data Access Components

Delphi Data Access Components is a line of DB connectivity solutions for such databases as: Oracle, Microsoft SQL Server, MySQL, InterBase, Firebird, PostgreSQL, SQLite, Microsoft Access, DB2, Sybase Advantage Database Server, Sybase Adaptive Server Enterprise, and other databases (using ODBC provider).

http://www.devart.com/dac.html

Delphi Data Access Components

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243 results found

  1. Unidump should backup and restore virtual/ stored virtual fields

    7 votes
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    1 comment  ·  MySQL  ·  Admin →
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  2. The possibility to read/write Geometry-Data-Types of PostGIS (MultiPolygon, Collections etc.) as it is possible with PostGreSQL-Geometry-Data-Types like lseg, polygon etc.

    7 votes
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    0 comments  ·  PostgreSQL  ·  Admin →
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  3. I think that this can be very useful I to be able to encapsulate the connecting data in a file UDL. In the forum You have promised that possibility for future versions, 5 years old.

    6 votes
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  4. Currently when I tried to perform some SQL operation like connect or use filtersql for table the db bound control flashes and I get many errors like "system out of resource" , etc...

    I wish to see IBDac add a new special module to use as a holder for the IBDac components. this module can work inside a second thread but at the same can be bound to the main thread VCL UI controls....is that possible ?

    6 votes
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  5. the TUniMetaData data-type field now returns different data for different databases - Example:
    currently for MySql it returns a string e.g. 'float'
    but for MS SQL server it returns a number: e.g. 5 (for float fields)

    so the recommended improvement is to add a new field to the result that returns a string representing the native database type.

    this feature is useful if you want to show a list of columns including data-types to the user - it can also be used to generate a create script, etc.

    6 votes
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    0 comments  ·  UniDAC  ·  Admin →
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  6. Trivial: SQLite: when user dblclicks TLiteDump it does not open string list editor like in TMyDump

    6 votes
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    0 comments  ·  SQLite  ·  Admin →
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  7. That's right! It is a very useful functionality, something like that
    exist in FIBPlus components and is called:

    WaitEndMasterScroll: boolean
    If WaitEndMasterScroll of a master-dataset is True then a detail-dataset
    will not be reopened while the master-dataset is in a browse state.

    WaitEndMasterInterval: integer
    Use WaitEndMasterInterval to set an interval before refreshing detail
    dataset while navigating.

    http://www.devrace.com/ru/fibplus/articles/1172.php

    +
    WaitEndAfterScroll
    WaitEndAfterScrollInterval - OnAfterScroll with timeout

    6 votes
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    1 comment  ·  Common  ·  Admin →
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  8. Sometimes is needed to preserve the existing records when loading from stream/file.
    That could be implemented either with overloading the existing methodes loadFrom... adding a parameter or with new methods like appendFrom....

    6 votes
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    0 comments  ·  Common  ·  Admin →
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  9. 6 votes
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    0 comments  ·  Common  ·  Admin →
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  10. When I use TClientDataSet + TDataSetProvider + TIBCQuery and I open the ClientDataSet and also the TIBQuery is opend and closed, but the transaction is automaticlally started but not closed. In a n-tier solution (e.g. DataSnap) I open the ClientDataSet in the the client but have no access to the underlying Query and Transaction which is on the server side.

    The TIBTransaction has that feature implemented and is very handy to use.

    6 votes
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  11. Timeout for connection pooling is fixed for 30000 ms in Unidac ( It is a local constant variable). It is not enough for some applications. We need more control on connection pooiling. It would be better if developer could set timeout as a property.

    6 votes
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    0 comments  ·  UniDAC  ·  Admin →
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  12. Postgres Advanced Server (PAS) is an extended version of PostgreSQL, it supports Stored Procedures, Packages and Aliasses. Currently, PgDAC does not support executing several of the commands available in PAS.

    6 votes
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    0 comments  ·  PostgreSQL  ·  Admin →
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  13. Enable retrieving Oracle objects and varrays from database in query fields. Now in some cases it only properly works if you're retrieving object into a parameter.

    6 votes
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    started  ·  0 comments  ·  UniDAC  ·  Admin →
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  14. RUS
    Предлагаю добавить у компоненты TUniSqlMonitor возможность указать имя файла, чтобы компонента сама всё писала в этот файл. Без использования события OnSQL.

    ENG
    I propose to add a component TUniSqlMonitor the ability to specify the file name to the component itself is all written in the file. Without the use of event OnSQL.

    5 votes
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    0 comments  ·  UniDAC  ·  Admin →
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  15. FIBPlus have a great and simple way to quickly ask databse about value or set of values, this method is called QueryValue. If I want to ask database for only one row, I do not want to create a dataset for it. It causes a big overhead.

    Instead I would like to ask for a value like this:

    MyValue := Connection.QueryValue('SELECT TOP 1 USERNAME FROM USERS WHERE SURNAME = :SURNAME', [Surname])

    5 votes
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  16. Support for InternalCalc fields. This is really usefull feature. And is supported by FireDac and ClientDataset.

    5 votes
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    2 comments  ·  Common  ·  Admin →
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  17. Include SQLite extensions like enable FTS5 in direct mode connection in UniDac.

    5 votes
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    0 comments  ·  SQLite  ·  Admin →
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  18. You can order your query/table with the property IndexFieldNames. But if you have an varchar field that contains numbers, the order is wrong. You get:

    1
    11
    2

    But better would be:
    1
    2
    11

    This can be done with the "natural sort" algorithm. Please implement it for the use with IndexFieldNames like:

    ATable.IndexFieldNames := 'MyField natural';

    I know I could sort it with SQL, but I need client side sorting with the property IndexFieldNames.

    For natural sort see:
    https://en.wikipedia.org/wiki/Natural_sort_order

    (As far I know Windows uses StrCmpLogicalW to sort file names in that way)

    5 votes
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  19. 4 votes
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    0 comments  ·  UniDAC  ·  Admin →
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  20. It is useful for inserting new data without selecting existing.

    4 votes
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    1 comment  ·  Admin →
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