Importing Data from SAP
Data can be imported from SAP (using the RFC interface) with --#ImportSapQuery command in SQL scripting and ReadSap function in the expression language. In addition to the RFC interface, data can be fetched from SAP HANA with ODBC using the ImportODBCSecure function and ImportOdbcQuery.
Data conversion in RFC interface
Data fetched from SAP using the RFC interface, contains accurate data type information, so data will be converted into respective data types used by the in-memory core and SQL Server as follows:
| SAP data type | Expression language: ReadSap function |
SQL scripting: --#ImportSapQuery |
|---|---|---|
| I (integer) | long | INT |
| F (flowing point number) | double | FLOAT |
| P (fixed point number, packed number) | double | FLOAT |
| C (default) (text) | string | NVARCHAR(length) or NVARCHAR(max) if length is greater than 8000 |
| D (date) | datetime | DATETIME2 |
| T (time) | timespan | TIME |
| N (numeric text) | string | NVARCHAR(length) or NVARCHAR(max) if length is greater than 8000 |
| X (binary data) | byte[] | VARBINARY(length) or VARBINARY(max) if length is greater than 8000 |
Conversions are determined by the ConvertDataTypes setting for each data type separately. If no conversions are explicitly configured, --#ImportSapQuery (in SQL scripting) does not make conversions (to maintain backwards compatibility), and ReadSap (in expression language) makes all conversion. When there is no conversion defined, data is converted to strings as defined by the table above.
Date (D) and time (T) type of fields are usually related to the same timestamp and thus they are bound together as follows: If T type of column is defined directly after the the D type of column, the time part in the T column is added to the D column, and no new column is created for the the T column. This is done only if both D and T types are among the converted types.
Note that, in the C datatype, spaces from both side are trimmed away.
More information about SAP data types: https://help.sap.com/saphelp_nwpi71/helpdata/en/fc/eb2fd9358411d1829f0000e829fbfe/content.htm?no_cache=true.