Method Execute

statement.go:575–594

Execute processes `DESCRIBE` statement for queries and DMLs.

(ctx context.Context, session *Session)

// Execute processes `DESCRIBE` statement for queries and DMLs.
func (s *DescribeStatement) Execute(ctx context.Context, session *Session) (*Result, error) {
	_, timestamp, metadata, err := runAnalyzeQuery(ctx, session, spanner.NewStatement(s.Statement), s.IsDML)
	if err != nil {
		return nil, err
	}

	var rows []Row
	for _, field := range metadata.GetRowType().GetFields() {
		rows = append(rows, Row{Columns: []string{field.GetName(), formatTypeVerbose(field.GetType())}})
	}

	result := &Result{
		AffectedRows: len(rows),
		ColumnNames:  describeColumnNames,
		Timestamp:    timestamp,
		Rows:         rows,
	}

	return result, nil
}

func runAnalyzeQuery(ctx context.Context, session *Session, stmt spanner.Statement, isDML bool) (queryPlan *pb.QueryPlan, commitTimestamp time.Time, metadata *pb.ResultSetMetadata, err error) {
	if !isDML {