How to use the opentracing.Tags.DB_STATEMENT function in opentracing

it('should start and finish span', async () => {
      const query = 'SELECT 1 AS result'
      const { rows } = await db.raw(query)

      expect(rows).to.be.eql([{ result: 1 }])

      expect(cls.startChildSpan).to.be.calledWith(tracer, `${instrumentation.OPERATION_NAME}_query`, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: instrumentation.DB_TYPE,
          [Tags.DB_STATEMENT]: query
        }
      })

      // FIXME: only with ../instrument.js tests together
      // expect(mockChildSpan.finish).to.have.callCount(1)
    })

it('should start and finish span', async () => {
      const query = 'SELECT 1 AS result'
      const result = await db.raw(query)

      expect(result[0]).to.be.eql([{ result: 1 }])

      expect(cls.startChildSpan).to.be.calledWith(tracer, `${instrumentation.OPERATION_NAME}_query`, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: instrumentation.DB_TYPE,
          [Tags.DB_STATEMENT]: query
        }
      })

      // FIXME: only with ../instrument.js tests together
      // expect(mockChildSpan.finish).to.have.callCount(1)
    })

client.set('string key', 'string val', (err, replies) => {
        expect(replies).to.be.eql('OK')
        expect(cls.startChildSpan).to.be.calledWith(tracer, 'redis_set', {
          tags: {
            [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
            [Tags.DB_TYPE]: instrumentation.DB_TYPE,
            [Tags.DB_STATEMENT]: 'set string key,string val'
          }
        })

        // FIXME: is this an issue?
        // expect(mockChildSpan.finish).to.have.callCount(1)

        done(err)
      })
    })

it('should start and finish span', async () => {
      const site = {
        name: 'risingstack',
        url: 'https://risingstack.com'
      }
      const result = await dbSites.insert(site)

      expect(result).to.be.eql(site)

      expect(cls.startChildSpan).to.be.calledWith(tracer, `${instrumentation.OPERATION_NAME}_insert`, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: instrumentation.DB_TYPE,
          [Tags.DB_STATEMENT]: JSON.stringify([site]),
          [Tags.DB_INSTANCE]: 'mydb.sites'
        }
      })
      expect(mockChildSpan.finish).to.have.callCount(1)
    })

const spans = tracers.map((tracer) => cls.startChildSpan(tracer, operationName, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: DB_TYPE,
          [Tags.DB_STATEMENT]: statement
        }
      }))

const spans = tracers.map((tracer) => cls.startChildSpan(tracer, operationName, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: DB_TYPE,
          [Tags.DB_STATEMENT]: statement
        }
      }))

const spans = tracers.map((tracer) => cls.startChildSpan(tracer, operationName, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: DB_TYPE,
          [Tags.DB_STATEMENT]: statement
        }
      }))

const spans = tracers.map((tracer) => cls.startChildSpan(tracer, operationName, {
        tags: {
          [Tags.SPAN_KIND]: Tags.SPAN_KIND_RPC_CLIENT,
          [Tags.DB_TYPE]: DB_TYPE,
          [Tags.DB_STATEMENT]: statement
        }
      }))