SAP HANA Predictive Analysis Library (PAL)

Prerequisites
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The target column of the training data must not have null values, and other columns should have at least
one valid value (not null).
The table used to store the tree model is a column table.
Note
CHAID treats null values as special values.
CREATEDTWITHCHAID
This function creates a decision tree from the input training data. It can be used for classification.
Procedure Generation
CALL SYS.AFLLANG_WRAPPER_PROCEDURE_CREATE (‘AFLPAL’, ‘CREATEDTWITHCHAID’,
‘’, '', );
The signature table should contain the following records:
Table 106:
Position Schema Name Table Type Name Parameter Type
1 IN
2 IN
3
4
OUT
OUT
Procedure Calling
CALL .(, ,
, ) with overview;
The procedure name is the same as specified in the procedure generation.
The input, parameter, and output tables must be of the types specified in the signature table.
Signature
Input Table
Table 107:
Table Column Column Data Type Description Constraint
Training Data Columns Varchar, nvarchar, integer,
or double
Independent fields
SAP HANA Predictive Analysis Library (PAL)
PAL Functions P U B L I C 151