SearchQueryMatchKeyNullExpression type

Search expression testing whether a key has any value. Operator EQ means "is null" — the object (or the struct instance, for a multi-key field) has no value for the key; NE means "is not null" — a value is present. Valid for every field type. Written in a query string as Key = NULL / Key != NULL: NULL is case-insensitive and unquoted; the quoted string 'NULL' is an ordinary text value.

Fields

Field Name	Description
`expressionType` - `SearchQueryExpressionType!`	The expression node type discriminator.
`key` - `String!`	The dot-notation key naming the object type and field whose presence is tested.
`operator` - `SearchMatchValueOperator!`	The logical comparison operator: EQ tests "is null", NE tests "is not null".
`keyType` - `SearchQuerySchemaFieldType!`	The schema field type of the key.
`multiKey` - `Boolean!`	True when the key is nested inside an array-of-struct path, so the null check matches within a single struct instance when combined with other multi-key predicates of the same struct.

Used by

GraphSearchAutocompletePayload type: Completion suggestions for one graph search autocomplete request.
SearchQueryExpressionType enum: The node type of a SearchQueryExpression: one operator variant and one variant per leaf value kind.

Example

{
  "expressionType": "OPERATOR",
  "key": "xyz789",
  "operator": "EQ",
  "keyType": "TEXT",
  "multiKey": true
}