OpenEdge Data Management: DataServer for Microsoft SQL Server

Determining your application needs
Data types
Determine your application needs and goals before changing INTEGER data types to INT64 data
types in applications. Not all INTEGER data types will necessarily require the additional bit size,
nor will wholesale changes in data types necessarily work efficiently with other interfaces to
ABL. For more information about determining when to use INT64 versus INTEGER, refer to the
Release 10 ABL Data Types Web paper available at the Web paper category of the PSDN Web
site located at http://communities.progress.com/pcom/community/psdn.
DataServer for MS SQL Server support for datetime data
types
OpenEdge DataServer for MS SQL Server supports DATETIME data types in MS SQL Server up
to SQL Server 2008 with full support for the ABL DATETIME-TZ data type.
Working with MS SQL Server and ABL datetime data types
Table 2–6 defines the MS SQL Server 2000, 2005 and 2008 data types and identifies compatible
ABL data types.
Table 2–6: MS SQL Server 2000 and 2005 datetime data types
MS SQL Server data
type Description
DATETIME Provides date and time data to an
accuracy of one three-hundredth of a
second (equivalent to 3.33 milliseconds
or 0.00333 seconds). Values are
rounded to increments of .000, .003, or
.007.
SMALLDATETIME
Provides date and time data with
accuracy to the minute.
Compatible
OpenEdge data
types
DATE 1
CHAR
DATETIME 2,3
DATETIME-TZ 3
DATE 1
CHAR
DATETIME 2,4
DATETIME-TZ 4
1. Default, compatible data type to which the native type can be converted.
2. Check the Default to OpenEdge DATETIME option from Pre-Selection Criteria For Schema Pull on the
Update/Add Table Definitions dialog to get this data type instead of the default.
3. When converting OpenEdge DateTime/TZ data types to the legacy MS SQL Server DateTime data type, the same
3.33 millisecond accuracy that SQL Server uses is applied to OpenEdge values with millisecond precision. This
means that .989, .990 and .991 round to .990, .992, .993 and .994 round to .993, .995, .996, .997 and .998 round
to .997 and .999 rounds up to 1.000.
4. When converting OpenEdge DateTime/TZ data types to the legacy MS SQL Server SmallDateTime data type, the
same minute accuracy that SQL Server uses is applied to OpenEdge values to with second or greater precision.
This means that seconds values up to 29.998 seconds will round down to zero and values from 29.999 seconds
and up will round up to the next minute.
Beginning in OpenEdge Release 10.2B, the DataServer for MS SQL Server supports mappings
of MS SQL Server datetime data types DATETIME and SMALLDATETIME to OpenEdge data type
DATETIME-TZ along with the compatible OpenEdge types listed in Table 2–5.
2–21