Welcome
Administration
Learn about how to configure, manage, and maintain HCL Detect environments. It includes details on system setup, user management, and permissions, ensuring seamless operation and efficient deployment of your continuous delivery processes.
Detect Expression Language
Comparison Operations

Getting Started
Welcome to the documentation for HCL Detect, where you can find information about how to install, maintain, and use this service.
Installation
Learn more about HCL Detect installation and deploying core components of the product.
Administration
Learn about how to configure, manage, and maintain HCL Detect environments. It includes details on system setup, user management, and permissions, ensuring seamless operation and efficient deployment of your continuous delivery processes.
- Introduction
  Use this guide to administer HCL Detect, including user and role access, CLI-based configuration and management tasks, DEL reference topics, and support resources.
- User & Role Management
  This page explains how to manage roles and permission in HCL Detect.
- Configuration Management
  Use CLI commands to query and validate the infrastructure settings required for Detect operations.
- Metadata Management
  Use CLI commands to discover data sources, search tables, and retrieve column metadata for Detect integrations.
- Profile Management
  Use CLI commands to create, update, query, and delete profile definitions used by Detect.
- Feed Application
  Use CLI commands to create and manage feed applications, including filtering and troubleshooting scenarios.
- Feed Parser Mapping
  Use CLI commands to define and maintain feed parser mappings between incoming feed fields and Detect target attributes.
- Destination Management
  Use CLI commands to configure, validate, and manage destination endpoints for Detect event delivery.
- Crypto Management
  Use CLI crypto utilities to encrypt and decrypt sensitive values used in Detect configuration workflows.
- Troubleshooting & Common Errors
- Support & Contact Information
- Detect Expression Language
- Detect Expression Language Built-in Functions
Working with the System
The section provides comprehensive instructions for creating, configuring, and managing marketing events. It covers topics such as defining audience conditions, setting up triggers, deploying events, and tracking their performance. Additionally, this section includes explanations of key terminology and offers advanced options to optimize event management.
System Data Model
This section provides detailed information about the internal tables used within the Detect module. It includes descriptions of each table's structure, purpose, and relationships, aiding administrators and developers in understanding and managing the underlying database schema effectively.

Comparison Operations

An expression in HCL Detect Expression Language can contain the basic comparison operations: greater than (>), greater than or equal (>=), less than (<), less than or equal (<=), equals (==), and not equals (!=) with the usual semantics. These are binary operations. With the exception of equals and not equals, they expect sub-expressions of numerical types or strings on each side. For strings, the comparison is based on lexicographic order. For equals and not equals, the left and the right sub-expressions must be of compatible types with respect to HCL Detect Expression Language coercion rules. The result of the comparison is always of type Bool.

Examples:

An expression using comparisons: 3>5
An expression using String comparisons: "abc"<"def"
An expression using inequality comparison: "abc"!="def"
An expression comparing a Double literal with a NaN (not a number) value: 10.5 != Double("nan") (Note that in this case, the math.isNaN built-in function can also be used.)
An expression comparing a Double literal with an Inf (positive infinity) value: 10.5 != Double("inf") (Note that in this case, the math.isPositiveInfinity built-in function can also be used.)
An expression comparing a Double literal with a -Inf (negative infinity) value: 10.5 != Double("-inf") (Note that in this case, the math.isNegativeInfinity built-in function can also be used.)