Add tests for null keyword behavior

query/querytest/query_test.go

@@ -21,6 +21,7 @@ var skipTests = map[string]string{
 	"window":                    "ordering of results differs between queries (https://github.com/influxdata/platform/issues/96)",
 	"window_group_mean_ungroup": "error in influxql: failed to run query: timeValue column \"_start\" does not exist (https://github.com/influxdata/platform/issues/97)",
 	"string_max":                "panic because no max() implementation for string (https://github.com/influxdata/platform/issues/352)",
+	"null_as_value":             "null not supported as value in influxql",
 }
 
 func Test_QueryEndToEnd(t *testing.T) {

query/querytest/test_cases/null_as_ident.flux

@@ -0,0 +1,3 @@
+null = "test"
+from(db: null)
+	|> range(start:-5m)

query/querytest/test_cases/null_as_ident.in.csv

@@ -0,0 +1,10 @@
+#datatype,string,long,dateTime:RFC3339,dateTime:RFC3339,dateTime:RFC3339,long,string,string,string,string,string,string
+#partition,false,false,false,false,false,false,true,true,true,true,true,true
+#default,_result,,,,,,,,,,,
+,result,table,_start,_stop,_time,_value,_field,_measurement,device,fstype,host,path
+,,97,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:26Z,318324641792,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,97,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:36Z,318324609024,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,97,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:46Z,318324129792,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,97,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:56Z,318324129792,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,97,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:54:06Z,318326116352,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,97,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:54:16Z,318325084160,free,disk,disk1s4,apfs,host.local,/private/var/vm

query/querytest/test_cases/null_as_ident.out.csv

@@ -0,0 +1,11 @@
+#datatype,string,long,dateTime:RFC3339,dateTime:RFC3339,dateTime:RFC3339,long,string,string,string,string,string,string
+#partition,false,false,false,false,false,false,true,true,true,true,true,true
+#default,_result,,,,,,,,,,,
+,result,table,_start,_stop,_time,_value,_field,_measurement,device,fstype,host,path
+,,0,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:26Z,318324641792,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,0,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:36Z,318324609024,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,0,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:46Z,318324129792,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,0,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:53:56Z,318324129792,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,0,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:54:06Z,318326116352,free,disk,disk1s4,apfs,host.local,/private/var/vm
+,,0,2018-05-22T19:53:24.421470485Z,2018-05-22T19:54:24.421470485Z,2018-05-22T19:54:16Z,318325084160,free,disk,disk1s4,apfs,host.local,/private/var/vm
+

query/querytest/test_cases/null_as_value.flux

@@ -0,0 +1,3 @@
+db = null 
+from(db: db)
+	|> range(start:-5m) 

query/querytest/test_cases/null_as_value.out.csv

@@ -0,0 +1 @@
+Null as value unimplemented