Table of Contents

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  1. Preface
  2. Introduction to Informatica Big Data Management
  3. Mappings in the Hadoop Environment
  4. Mapping Sources in the Hadoop Environment
  5. Mapping Targets in the Hadoop Environment
  6. Mapping Transformations in the Hadoop Environment
  7. Processing Hierarchical Data on the Spark Engine
  8. Configuring Transformations to Process Hierarchical Data
  9. Processing Unstructured and Semi-structured Data with an Intelligent Structure Model
  10. Stateful Computing on the Spark Engine
  11. Monitoring Mappings in the Hadoop Environment
  12. Mappings in the Native Environment
  13. Profiles
  14. Native Environment Optimization
  15. Cluster Workflows
  16. Connections
  17. Data Type Reference
  18. Function Reference
  19. Parameter Reference

Struct Data Type

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}


Updated October 23, 2019