Query doesn't support select elements for map column

[ivan-zaitsev]

Query doesn't support select elements for map column.

Example of code:

CREATE TABLE data (fields map<VARCHAR, VARCHAR>);

class Data {
        Map<String, String> fields;
}

CassandraOperations cassandraOperations;

Select query = QueryBuilder.selectFrom("table").all()
        .element("map", QueryBuilder.literal("key1"))
        .element("map", QueryBuilder.literal("key2"));

Data data = cassandraOperations.select(query, Data.class);

data object will not have map elements present.

[ivan-zaitsev]

As a workaround possible to create custom Mapper, but not so easy to make it universal to work with any data model.

[mp911de]

The query SELECT map['key1'],map['key2'] FROM table isn't supposed to map any keys into Data.fields as the property names do not match. In fact, map['key1'] has no column name. You have to provide a data structure along a query where property names map to column names.