query property
The query string that matches against the full text of the document and the searchable properties.
The query partially supports
Google AIP style syntax. Specifically, the
query supports literals, logical operators, negation operators, comparison
operators, and functions. Literals: A bare literal value (examples: "42",
"Hugo") is a value to be matched against. It searches over the full text
of the document and the searchable properties. Logical operators: "AND",
"and", "OR", and "or" are binary logical operators (example: "engineer OR
developer"). Negation operators: "NOT" and "!" are negation operators
(example: "NOT software"). Comparison operators: support the binary
comparison operators =, !=, <, >, <= and >= for string, numeric, enum,
boolean. Also support like operator ~~ for string. It provides semantic
search functionality by parsing, stemming and doing synonyms expansion
against the input query. To specify a property in the query, the left hand
side expression in the comparison must be the property ID including the
parent. The right hand side must be literals. For example:
""projects/123/locations/us".property_a < 1" matches results whose
"property_a" is less than 1 in project 123 and us location. The literals
and comparison expression can be connected in a single query (example:
"software engineer "projects/123/locations/us".salary > 100").
Functions: supported functions are LOWER([property_name]) to perform a
case insensitive match and EMPTY([property_name]) to filter on the
existence of a key. Support nested expressions connected using parenthesis
and logical operators. The default logical operators is AND if there is
no operators between expressions. The query can be used with other filters
e.g. time_filters and folder_name_filter. They are connected with
AND operator under the hood. The maximum number of allowed characters is
255.
Implementation
core.String? query;