TYPE Structure Special Functions


EXPORT LogicalType LOAD(PhysicalType alias) := expression;

LogicalTypeThe value type of the resulting output of the function.
PhysicalTypeThe value type of the input parameter to the function.
aliasThe name of the input to use in the expression.
expressionThe operation to perform on the input.

LOAD defines the callback function to be applied to the bytes of the record to create the data value to be used in the computation. This function defines how the system reads the data from disk.