SAP HANA Developer Guide - Get a Free Blog

}
];
5.9.3 Table-Import Extensions
The table-import feature enables you to modify the initial settings for variables defined in table-import
configuration files by specifying new settings for defined variables in separate extension files.
If both a table-import model and a table-import data file exist, then you can modify initial variable assignments
made in one table-import data file in a subsequent table-import data files (so called extensions) - as long as the
variables are not declared explicitly as final in a previous file. The modification takes place only on the data values
of variables, for example, in a table-import-extension data file, where values can be augmented or be replaced.
The result is a chain of table-import data artifacts. The end result of a successful table import operation is based
on the resulting definition of the file-list parameter as a result of all data files in the chain.
Note: You can only create a linear chain of extensions. It is not permitted to create two table import data
files modifying the same base table import data files.
The following example illustrates a simple table-import model named timodel.hdbtim in the package
TiPackage.
csvFileList csvList;
import csvList "TISCHEMA" "TiPackage::TiTable";
The following example illustrates the contents of a simple table-import data file named tidata.hdbtid, which
implements the table-import model defined in timodel.hdbtim illustrated above.
implements TiPackage:timodel.hdbtim;
csvList = ["TiPackage:mydata.csv"];
The following example illustrates how to extend the definition in the table-import data file tidata.hdbtid
illustrated above.
modifies sap.myPackage:tidata.hdbtid;
csvList = csvList + ["TiPackage:myotherdata.csv"];
After activation of the table-import files, the data from both CSV files (TiPackage:mydata.csv, and
TiPackage:myotherdata.csv) is imported into the target table.
5.9.4 Table-Import Configuration-File Syntax
When you define the details of the table-import operation, you use the following file-list types to enable the
processing of certain data formats:
● csvFileList
Used to specify list of comma-separated values (CSV) file links. The linked CSV files are imported into the
target table specified in the table import model. The import process parses and validates the CSV file format.
● csvFileListExt
84
Similar to (but more flexible than) csvFileList since more settings are possible. You must specify the target
table and the destination file list of CSV files, which is also extendable. For each CSV file it is possible to define
the following additional options:
○ If a header is given or not
○ Which delimiter is use to separate the CSV data
P U B L I C
© 2012 SAP AG. All rights reserved.
SAP HANA Developer Guide
Setting Up the Persistence Model