Big Data Management User Guide

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Struct Data Type

A struct data type represents a collection of elements of different data types. A struct data type has an associated schema that defines the structure of the data. To pass, generate, or process struct data, assign struct data type to ports.

The schema for the struct data type determines the element names and the number of elements in the struct data. The schema also determines the order of elements in the struct data. Informatica uses complex data type definitions to represent the schema of struct data.

The transformation language includes operators to access struct elements. It also includes functions to generate and process struct data and to modify the schema of the data.

Format

struct {element_name1:value1 [, element_name2:value2, ...]}

Schema for the struct is of the following format:

schema {element_name1:data_type1 [, element_name2:data_type2, ...]}

The following table describes the arguments for this data type:

Argument	Description
struct	Name of the struct column or port.
schema	A definition of the structure of data. Schema is a name-type pair that determines the name and data type of the struct elements.
element_name	Name of the struct element.
value	Value of the struct element.
data_type	Data type of the element value. The element values can be of a primitive or complex data type. Each element in the struct can have a different data type.

Struct Example

The following schema is for struct data to store customer addresses:

address 
{st_number:integer,st_name:string,city:string,state:string,zip:string}

The following example shows struct data values for the cust_address column:

cust_address
{st_number:154,st_name:Addison Ave,city:Redwood City,state:CA,zip:94065}
{st_number:204,st_name:Ellis St,city:Mountain View,state:CA,zip:94043}
{st_number:357,st_name:First St,city:Sunnyvale,state:CA,zip:94085}

cust_address

{st_number:154,st_name:Addison Ave,city:Redwood City,state:CA,zip:94065}

{st_number:204,st_name:Ellis St,city:Mountain View,state:CA,zip:94043}

{st_number:357,st_name:First St,city:Sunnyvale,state:CA,zip:94085}

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Big Data Management User Guide

Big Data Management User Guide

Struct Data Type

Struct Data Type

Format

Struct Example