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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  1. Currently we are migrating Oracle to PostgreSQL DBExpress. With Oracle, we were able to categorize DBExpress errors based on the message "ORA-XXXXX" and perform appropriate error handling. We had to do this because of the limitation of DBExpress.

    With PostgreSQL, we have the problem that we only get the error message. So we would have to parse all error messages individually. Per error code there are 1:n different PostgreSQL error messages!

    Therefore our question to you: Would it be possible to set the error code analog to Oracle at the start of the error message?

    For example "PG-22023 input string…

    1 vote
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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.

    6 votes
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  3. Actually (v6.2.4), the PgDac TPgDump component does not generate appropriate code for inherited tables, making it useless when inherited tables are used, and we need to get the SQL script to generate the given schema.

    TPgDump should support tables inheritance and:
    - create base tables before inherited tables
    - use the inherits clause within the table creation sql statement
    - do not generate insert statements for base tables data, only for inherited tables

    Thanks,

    3 votes
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  4. UniDAC currently only supports OpenSSL 1.0.2. This version won't be supported past 2019-Dec-31.

    To avoid problems UniDAC should support OpenSSL 1.1

    4 votes
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  5. The RefreshQuick method (https://www.devart.com/mydac/docs/devart.mydac.tcustommydataset.refreshquick(system.boolean).htm) seems very useful to refresh only the new records from big datasets. Ideally, make it possible to specify the name of the TIMESTAMP field so we don't have to create a duplicate - mine are called "created" for example). Maybe we don't even need the TimeStamp field for Postgresql ?

    1 vote
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  6. 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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  7. PostgreSQL 9.2 has a new feature that allows results sets to be returned row by row instead of the whole result set at once.
    This is a huge improvement for larger result sets.
    See here for more info:
    http://www.postgresql.org/docs/9.2/static/libpq-single-row-mode.html

    9 votes
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  8. Implement COPY FROM/TO functionality for PostgreSQL (PgDAC component).

    PostgreSQL COPY manual:
    http://www.postgresql.org/docs/current/interactive/sql-copy.html

    101 votes
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