influxdb: influxql: make measurement-autocomplete case insensitive (#34563)

public/app/plugins/datasource/influxdb/query_builder.ts

@@ -44,7 +44,8 @@ export class InfluxQueryBuilder {
     } else if (type === 'MEASUREMENTS') {
       query = 'SHOW MEASUREMENTS';
       if (withMeasurementFilter) {
-        query += ' WITH MEASUREMENT =~ /' + kbn.regexEscape(withMeasurementFilter) + '/';
+        // we do a case-insensitive regex-based lookup
+        query += ' WITH MEASUREMENT =~ /(?i)' + kbn.regexEscape(withMeasurementFilter) + '/';
       }
     } else if (type === 'FIELDS') {
       measurement = this.target.measurement;

public/app/plugins/datasource/influxdb/specs/query_builder.test.ts

@@ -56,13 +56,13 @@ describe('InfluxQueryBuilder', () => {
     it('should have WITH MEASUREMENT in measurement query for non-empty query with no tags', () => {
       const builder = new InfluxQueryBuilder({ measurement: '', tags: [] });
       const query = builder.buildExploreQuery('MEASUREMENTS', undefined, 'something');
-      expect(query).toBe('SHOW MEASUREMENTS WITH MEASUREMENT =~ /something/ LIMIT 100');
+      expect(query).toBe('SHOW MEASUREMENTS WITH MEASUREMENT =~ /(?i)something/ LIMIT 100');
     });
 
     it('should escape the regex value in measurement query', () => {
       const builder = new InfluxQueryBuilder({ measurement: '', tags: [] });
       const query = builder.buildExploreQuery('MEASUREMENTS', undefined, 'abc/edf/');
-      expect(query).toBe('SHOW MEASUREMENTS WITH MEASUREMENT =~ /abc\\/edf\\// LIMIT 100');
+      expect(query).toBe('SHOW MEASUREMENTS WITH MEASUREMENT =~ /(?i)abc\\/edf\\// LIMIT 100');
     });
 
     it('should have WITH MEASUREMENT WHERE in measurement query for non-empty query with tags', () => {
@@ -71,7 +71,7 @@ describe('InfluxQueryBuilder', () => {
         tags: [{ key: 'app', value: 'email' }],
       });
       const query = builder.buildExploreQuery('MEASUREMENTS', undefined, 'something');
-      expect(query).toBe('SHOW MEASUREMENTS WITH MEASUREMENT =~ /something/ WHERE "app" = \'email\' LIMIT 100');
+      expect(query).toBe('SHOW MEASUREMENTS WITH MEASUREMENT =~ /(?i)something/ WHERE "app" = \'email\' LIMIT 100');
     });
 
     it('should have where condition in measurement query for query with tags', () => {