Exemplo n.º 1
0
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)
}
Exemplo n.º 2
0
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
}