@Test
    void testMultiSources() {
        assertSources("select foo from sources sourceA, sourceB where price <= 500", List.of("sourceA", "sourceB"));
    }
Specification for the conversion of YQL+ expressions to Vespa search queries.

@author Steinar Knutsen
@author Stian Kristoffersen
container-search/src/test/java/com/yahoo/search/yql/YqlParserTestCase.java