MongoDB Query Language (MQL) Evaluation Query Operators
Evaluation query operators are used to evaluate expressions and perform dynamic operations.
$expr
The $expr operator allows the use of aggregation expressions within the query language, enabling complex field comparisons and calculations.
$jsonSchema
The $jsonSchema operator validates documents against a JSON Schema definition for data validation and structure enforcement. Discover supported features and limitations.
$mod
The $mod operator performs a modulo operation on the value of a field and selects documents with a specified result.
$regex
The $regex operator provides regular expression capabilities for pattern matching in queries, allowing flexible string matching and searching.
$text
The $text operator performs text search on the content of indexed string fields, enabling full-text search capabilities.