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data.go
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data.go
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// Copyright 2016 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
//
// Author: Radu Berinde (radu@cockroachlabs.com)
package distsqlrun
import (
"github.com/cockroachdb/cockroach/pkg/sql/sqlbase"
"github.com/cockroachdb/cockroach/pkg/util/encoding"
)
// convertToColumnOrdering converts an Ordering type (as defined in data.proto)
// to a sqlbase.ColumnOrdering type.
func convertToColumnOrdering(specOrdering Ordering) sqlbase.ColumnOrdering {
ordering := make(sqlbase.ColumnOrdering, len(specOrdering.Columns))
for i, c := range specOrdering.Columns {
ordering[i].ColIdx = int(c.ColIdx)
if c.Direction == Ordering_Column_ASC {
ordering[i].Direction = encoding.Ascending
} else {
ordering[i].Direction = encoding.Descending
}
}
return ordering
}
// convertToSpecOrdering converts a sqlbase.ColumnOrdering type
// to an Ordering type (as defined in data.proto).
func convertToSpecOrdering(columnOrdering sqlbase.ColumnOrdering) Ordering {
specOrdering := Ordering{}
specOrdering.Columns = make([]Ordering_Column, len(columnOrdering))
for i, c := range columnOrdering {
specOrdering.Columns[i].ColIdx = uint32(c.ColIdx)
if c.Direction == encoding.Ascending {
specOrdering.Columns[i].Direction = Ordering_Column_ASC
} else {
specOrdering.Columns[i].Direction = Ordering_Column_DESC
}
}
return specOrdering
}