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OpenAccess SDK SQL Engine Core Functions API : Custom scalar functions
 

Custom scalar functions

Custom scalar functions are an extension of scalar functions that are used only in a search condition (WHERE clause). OpenAccess SDK enables the IP to obtain details of the custom scalar conditions and to handle their evaluation. OpenAccess SDK then transforms the custom conditions into a set of AND conditions and returns each set as a list. Each list can contain one or more conditions as OR predicates.
Your IP must perform a sequence of operations to handle the evaluation of custom scalar functions in WHERE clause. See Using custom scalar functions in a WHERE clause for more information.
In this section: 
* dam_add_custom_scalar
* dam_add_custom_scalarEx2
* dam_getSetOfCustomConditionLists
* dam_describeCustomCond
* dam_describeCustomCondEx2
* Using custom scalar functions in a WHERE clause
* Using custom scalar functions with a C/C++ IP