func (e *QueryExecutor) executeDropSeriesStatement(stmt *influxql.DropSeriesStatement, database string) error {
if dbi, err := e.MetaClient.Database(database); err != nil {
return err
} else if dbi == nil {
return influxql.ErrDatabaseNotFound(database)
}
// Check for time in WHERE clause (not supported).
if influxql.HasTimeExpr(stmt.Condition) {
return errors.New("DROP SERIES doesn't support time in WHERE clause")
}
// Locally drop the series.
return e.TSDBStore.DeleteSeries(database, stmt.Sources, stmt.Condition)
}
func (s *Store) ExecuteShowTagValuesStatement(stmt *influxql.ShowTagValuesStatement, database string) (models.Rows, error) {
// NOTE(benbjohnson):
// This function is temporarily moved here until reimplemented in the new query engine.
// Check for time in WHERE clause (not supported).
if influxql.HasTimeExpr(stmt.Condition) {
return nil, errors.New("SHOW TAG VALUES doesn't support time in WHERE clause")
}
// Find the database.
db := s.DatabaseIndex(database)
if db == nil {
return nil, nil
}
// Expand regex expressions in the FROM clause.
sources, err := s.ExpandSources(stmt.Sources)
if err != nil {
return nil, err
}
// Get the list of measurements we're interested in.
measurements, err := measurementsFromSourcesOrDB(db, sources...)
if err != nil {
return nil, err
}
// Make result.
var rows models.Rows
tagValues := make(map[string]stringSet)
for _, m := range measurements {
var ids SeriesIDs
if stmt.Condition != nil {
// Get series IDs that match the WHERE clause.
ids, _, err = m.walkWhereForSeriesIds(stmt.Condition)
if err != nil {
return nil, err
}
// If no series matched, then go to the next measurement.
if len(ids) == 0 {
continue
}
// TODO: check return of walkWhereForSeriesIds for fields
} else {
// No WHERE clause so get all series IDs for this measurement.
ids = m.seriesIDs
}
for k, v := range m.tagValuesByKeyAndSeriesID(stmt.TagKeys, ids) {
_, ok := tagValues[k]
if !ok {
tagValues[k] = v
}
tagValues[k] = tagValues[k].union(v)
}
}
for k, v := range tagValues {
r := &models.Row{
Name: k + "TagValues",
Columns: []string{k},
}
vals := v.list()
sort.Strings(vals)
for _, val := range vals {
v := interface{}(val)
r.Values = append(r.Values, []interface{}{v})
}
rows = append(rows, r)
}
sort.Sort(rows)
return rows, nil
}