108 lines
3.0 KiB
Go
108 lines
3.0 KiB
Go
// Copyright 2023 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package importer
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import (
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"context"
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"fmt"
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"github.com/jedib0t/go-pretty/v6/table"
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"github.com/jedib0t/go-pretty/v6/text"
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"github.com/pingcap/tidb/br/pkg/lightning/common"
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"github.com/pingcap/tidb/br/pkg/lightning/precheck"
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"github.com/pingcap/tidb/parser/terror"
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"github.com/pingcap/tidb/util/dbterror/exeerrors"
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"github.com/pingcap/tidb/util/sqlexec"
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)
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// CheckRequirements checks the requirements for load data.
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func (e *LoadDataController) CheckRequirements(ctx context.Context, conn sqlexec.SQLExecutor) error {
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collector := newPreCheckCollector()
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// todo: maybe we can reuse checker in lightning
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sql := fmt.Sprintf("SELECT 1 FROM %s USE INDEX() LIMIT 1", common.UniqueTable(e.DBName, e.Table.Meta().Name.L))
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rs, err := conn.ExecuteInternal(ctx, sql)
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if err != nil {
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return err
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}
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defer terror.Call(rs.Close)
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rows, err := sqlexec.DrainRecordSet(ctx, rs, 1)
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if err != nil {
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return err
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}
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if len(rows) > 0 {
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collector.fail(precheck.CheckTargetTableEmpty, "target table is not empty")
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} else {
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collector.pass(precheck.CheckTargetTableEmpty)
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}
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if !collector.success() {
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return exeerrors.ErrLoadDataPreCheckFailed.FastGenByArgs("\n" + collector.output())
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}
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return nil
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}
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const (
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failed = "failed"
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passed = "passed"
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)
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type preCheckCollector struct {
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failCount int
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t table.Writer
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}
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func newPreCheckCollector() *preCheckCollector {
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t := table.NewWriter()
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t.AppendHeader(table.Row{"Check Item", "Result", "Detailed Message"})
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t.SetColumnConfigs([]table.ColumnConfig{
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{Name: "Check Item", WidthMax: 20},
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{Name: "Result", WidthMax: 6},
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{Name: "Detailed Message", WidthMax: 130},
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})
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style := table.StyleDefault
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style.Format.Header = text.FormatDefault
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t.SetStyle(style)
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return &preCheckCollector{
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t: t,
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}
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}
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func (c *preCheckCollector) fail(item precheck.CheckItemID, msg string) {
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c.failCount++
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c.t.AppendRow(table.Row{item.DisplayName(), failed, msg})
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c.t.AppendSeparator()
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}
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func (c *preCheckCollector) success() bool {
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return c.failCount == 0
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}
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func (c *preCheckCollector) output() string {
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c.t.SetAllowedRowLength(170)
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c.t.SetRowPainter(func(row table.Row) text.Colors {
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if result, ok := row[1].(string); ok {
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if result == failed {
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return text.Colors{text.FgRed}
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}
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}
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return nil
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})
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return c.t.Render() + "\n"
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}
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func (c *preCheckCollector) pass(item precheck.CheckItemID) {
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c.t.AppendRow(table.Row{item.DisplayName(), passed, ""})
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c.t.AppendSeparator()
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}
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