forked from cockroachdb/cockroach
/
rows.go
64 lines (56 loc) · 1.55 KB
/
rows.go
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// Copyright 2015 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. See the AUTHORS file
// for names of contributors.
//
// Author: Peter Mattis (peter@cockroachlabs.com)
package driver
import (
"database/sql/driver"
"io"
)
type row []driver.Value
type rows struct {
columns []string
rows []row
pos int // Next iteration index into rows.
}
// newSingleColumnRows returns a rows structure initialized with a single
// column of values using the specified column name and values. This is a
// convenience routine used by operations which return only a single column.
func newSingleColumnRows(column string, vals []string) *rows {
r := make([]row, len(vals))
for i, v := range vals {
r[i] = row{v}
}
return &rows{
columns: []string{column},
rows: r,
}
}
func (r *rows) Columns() []string {
return r.columns
}
func (r *rows) Close() error {
return nil
}
func (r *rows) Next(dest []driver.Value) error {
if r.pos >= len(r.rows) {
return io.EOF
}
for i, v := range r.rows[r.pos] {
dest[i] = v
}
r.pos++
return nil
}