功能 functions

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• TL;DR: This page is a categorized reference of all 60+ built-in functions available in the Journey advanced expression editor, covering aggregation, conversion, date/time, list, math, string, and Adobe Experience Platform audience functions.

Intents:

• Identify the right function for a task by browsing the categorized function tables
• Transform data types between string, integer, decimal, boolean, date, and duration using conversion functions
• Perform date-based filtering with functions like inLastDays, inNextHours, nowWithDelta, and dateDiff
• Manipulate and validate string values using functions like contain, replace, split, and trim
• Perform statistical calculations on collections using aggregation functions like count, avg, sum, and distinctCount
• Check audience membership in journey conditions using the inAudience function

Glossary:

• Aggregation functions: Functions that compute a single value (count, sum, average, min, max) from a collection of values (product-specific)
• Conversion functions: Functions that cast a value from one data type to another (e.g. toString, toDateTime, toDuration) (product-specific)
• Date functions: Functions for working with date, time, and timezone values in journey expressions (product-specific)
• List functions: Functions for filtering, sorting, and analyzing array/collection data (product-specific)
• inAudience: A function that checks whether a profile belongs to a specified Adobe Experience Platform audience segment (product-specific)

Guardrails:

• Functions follow a consistent syntax: functionName(param1, param2, ...)
• A function may have multiple signatures (different parameter sets) to handle different use cases
• Each function has a fixed return type — ensure the return type matches what the expression context expects
• The functions available in the Journey expression editor differ from those in the personalization editor

Terminology:

• Canonical name: Functions — Acronym: none — variants: built-in functions, expression functions
• Synonyms: “aggregation functions” = “statistical functions”; “conversion functions” = “type casting functions”
• Do not confuse: journey expression functions ≠ personalization editor functions (different sets)

FAQ:

• Q: How many functions are available in the Journey expression editor? — Over 60 functions organized across categories including aggregation, conversion, date, list, math, string, and Adobe Experience Platform.
• Q: How do I check if a profile belongs to an audience in a journey condition? — Use the inAudience function with the audience identifier.
• Q: What function should I use to get the current date and time offset by a number of days? — Use nowWithDelta(N, "days") to get a dateTime offset from the current time.
• Q: How can I calculate the difference between two dates? — Use the dateDiff function. Both parameters must be the same type: dateOnly parameters return the difference in days, while dateTimeOnly and dateTime parameters return the difference in milliseconds.
• Q: Can a function return different types depending on how it is called? — A function has a specific return type per signature, but a single function name can have multiple signatures with different parameter sets and return types.
• Q: What is the difference between count and countWithNull? — count counts only non-null elements; countWithNull counts all elements including nulls.