OpenEdge Data Management: DataServer for Microsoft SQL Server

Chapter 2: Initial Programming Considerations
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 10 defines the MS SQL Server 2000, 2005 and 2008 data types and identifies
compatible ABL data types.
Table 10: 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 9.
MS SQL Server 2008 offers the DATETIMEOFFSET data type to support time zones in a
datetime column as well as three other datetime data types. Table 11 defines the MS
SQL 2008 data types and identifies compatible ABL data types.
76 OpenEdge Data Management: DataServer for Microsoft SQL Server