Opérateurs operators

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For complete understanding, this information should be combined with the documentation on this page. Neither source is intended to stand alone; the page describes the feature, while this section provides additional context that helps disambiguate terminology, intent, applicability, and constraints.

• TL;DR: This page is a complete reference of operators available in the Journey advanced expression editor, covering logical (and, or, not), comparison (==, !=, >, >=, <, <=, is null, is not null, has null), arithmetic (+, -, /, *, %), math type-check (is numeric, is integer, is decimal), string concatenation, and date arithmetic operators.

Intents:

• Combine boolean conditions using logical operators and, or, and not
• Check whether a field or expression value is null or not null using is null / is not null
• Detect null values within a list using the has null operator
• Compare numeric, datetime, and datetimeonly values using >, >=, <, <=, ==, and !=
• Perform arithmetic on numeric values using +, -, /, *, and %
• Add a duration to a dateTime, dateTimeOnly, or duration value using the + operator

Glossary:

• Unary operator: An operator applied to a single operand; can be left-hand (e.g. not) or right-hand (e.g. is null) (product-specific)
• Binary operator: An operator applied between two operands (e.g. and, ==, +) (product-specific)
• has null: A right-hand unary operator that returns true if a list contains at least one null element (product-specific)
• is numeric / is integer / is decimal: Type-check operators that return a boolean based on the numeric subtype of the expression (product-specific)

Guardrails:

• When using multiplication (*), both operands must be the same numeric type (both integer or both decimal) — mixing types causes an error
• When using the + operator for date arithmetic, the expression must be wrapped in parentheses to avoid parsing errors
• Comparison operators (>, >=, <, <=) are only valid between compatible types: Datetime with Datetime, DatetimeOnly with DatetimeOnly, or numeric with numeric — any other combination is forbidden
• An empty string "" is not considered null — has null returns false for a list containing ""
• The == and != operators perform no data type control between operands

Terminology:

• Canonical name: Operators — Acronym: none — variants: expression operators, journey operators
• Synonyms: and = “logical AND”; or = “logical OR”; not = “logical NOT”; % = “modulo”
• Do not confuse: is null (expression has no evaluated value) ≠ == null (not a valid syntax); has null (list contains null) ≠ is null (expression itself is null)

FAQ:

• Q: Can I multiply an integer by a decimal directly? — No; both operands of * must be the same type. Use 3.0 * 4.0 (both decimal) or 3 * 4 (both integer).
• Q: How do I add 15 minutes to a dateTime? — Use (toDateTime("...")) + (toDuration("PT15M")).
• Q: What is the difference between is null and has null? — is null checks whether a single expression has no evaluated value; has null checks whether a list contains at least one null element.
• Q: Does "" has null return true? — No; an empty string is not considered null, so the result is false.
• Q: Why does 3 * 4.0 cause an error? — The * operator requires both operands to be the same numeric type; mixing integer and decimal is not allowed.