mirror of
https://github.com/TeaOSLab/EdgeAPI.git
synced 2025-11-07 02:20:24 +08:00
修改SQL对比算法
This commit is contained in:
刘祥超
256
internal/setup/sql_dump.go
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256
internal/setup/sql_dump.go
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@@ -0,0 +1,256 @@
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package setup
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import (
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"github.com/iwind/TeaGo/dbs"
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"github.com/iwind/TeaGo/types"
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"regexp"
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"strings"
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)
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var recordsTables = []*SQLRecordsTable{
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{
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TableName: "edgeRegionCities",
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UniqueFields: []string{"name", "provinceId"},
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},
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{
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TableName: "edgeRegionCountries",
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UniqueFields: []string{"name"},
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},
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{
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TableName: "edgeRegionProvinces",
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UniqueFields: []string{"name", "countryId"},
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},
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}
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type SQLDump struct {
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}
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func NewSQLDump() *SQLDump {
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return &SQLDump{}
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}
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// 导出数据
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func (this *SQLDump) Dump(db *dbs.DB) (result *SQLDumpResult, err error) {
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result = &SQLDumpResult{}
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tableNames, err := db.TableNames()
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if err != nil {
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return result, err
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}
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for _, tableName := range tableNames {
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// 忽略一些分表
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if strings.HasPrefix(tableName, "edgeHTTPAccessLogs_") {
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continue
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}
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table, err := db.FindFullTable(tableName)
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if err != nil {
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return nil, err
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}
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sqlTable := &SQLTable{
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Name: table.Name,
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Engine: table.Engine,
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Charset: table.Collation,
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Definition: regexp.MustCompile(" AUTO_INCREMENT=\\d+").ReplaceAllString(table.Code, ""),
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}
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// 字段
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fields := []*SQLField{}
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for _, field := range table.Fields {
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fields = append(fields, &SQLField{
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Name: field.Name,
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Definition: field.Definition(),
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})
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}
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sqlTable.Fields = fields
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// 索引
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indexes := []*SQLIndex{}
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for _, index := range table.Indexes {
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indexes = append(indexes, &SQLIndex{
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Name: index.Name,
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Definition: index.Definition(),
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})
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}
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sqlTable.Indexes = indexes
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// Records
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records := []*SQLRecord{}
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recordsTable := this.findRecordsTable(tableName)
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if recordsTable != nil {
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ones, _, err := db.FindOnes("SELECT * FROM " + tableName + " ORDER BY id ASC")
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if err != nil {
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return result, err
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}
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for _, one := range ones {
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record := &SQLRecord{
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Id: one.GetInt64("id"),
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Values: map[string]string{},
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UniqueFields: recordsTable.UniqueFields,
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}
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for k, v := range one {
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record.Values[k] = types.String(v)
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}
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records = append(records, record)
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}
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}
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sqlTable.Records = records
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result.Tables = append(result.Tables, sqlTable)
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}
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return
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}
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// 应用数据
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func (this *SQLDump) Apply(db *dbs.DB, newResult *SQLDumpResult) (ops []string, err error) {
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currentResult, err := this.Dump(db)
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if err != nil {
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return nil, err
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}
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// 新增表格
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for _, newTable := range newResult.Tables {
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oldTable := currentResult.FindTable(newTable.Name)
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if oldTable == nil {
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ops = append(ops, "+ table "+newTable.Name)
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_, err = db.Exec(newTable.Definition)
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if err != nil {
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return nil, err
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}
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} else if oldTable.Definition != newTable.Definition {
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// 对比字段
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// +
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for _, newField := range newTable.Fields {
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oldField := oldTable.FindField(newField.Name)
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if oldField == nil {
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ops = append(ops, "+ "+newTable.Name+" "+newField.Name)
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_, err = db.Exec("ALTER TABLE " + newTable.Name + " ADD " + newField.Name + " " + newField.Definition)
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if err != nil {
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return nil, err
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}
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} else if oldField.Definition != newField.Definition {
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ops = append(ops, "* "+newTable.Name+" "+newField.Name)
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_, err = db.Exec("ALTER TABLE " + newTable.Name + " MODIFY " + newField.Name + " " + newField.Definition)
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if err != nil {
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return nil, err
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}
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}
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}
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// 对比索引
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// +
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for _, newIndex := range newTable.Indexes {
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oldIndex := oldTable.FindIndex(newIndex.Name)
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if oldIndex == nil {
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ops = append(ops, "+ index "+newTable.Name+" "+newIndex.Name)
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_, err = db.Exec("ALTER TABLE " + newTable.Name + " ADD " + newIndex.Definition)
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if err != nil {
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return nil, err
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}
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} else if oldIndex.Definition != newIndex.Definition {
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ops = append(ops, "* index "+newTable.Name+" "+newIndex.Name)
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_, err = db.Exec("ALTER TABLE " + newTable.Name + " DROP KEY " + newIndex.Name)
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if err != nil {
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return nil, err
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}
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_, err = db.Exec("ALTER TABLE " + newTable.Name + " ADD " + newIndex.Definition)
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if err != nil {
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return nil, err
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}
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}
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}
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// -
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for _, oldIndex := range oldTable.Indexes {
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newIndex := newTable.FindIndex(oldIndex.Name)
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if newIndex == nil {
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ops = append(ops, "- index "+oldTable.Name+" "+oldIndex.Name)
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_, err = db.Exec("ALTER TABLE " + oldTable.Name + " DROP KEY " + oldIndex.Name)
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if err != nil {
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return nil, err
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}
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}
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}
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// 对比字段
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// -
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for _, oldField := range oldTable.Fields {
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newField := newTable.FindField(oldField.Name)
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if newField == nil {
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ops = append(ops, "- field "+oldTable.Name+" "+oldField.Name)
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_, err = db.Exec("ALTER TABLE " + oldTable.Name + " DROP COLUMN " + oldField.Name)
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if err != nil {
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return nil, err
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}
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}
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}
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}
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// 对比记录
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// +
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for _, record := range newTable.Records {
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queryArgs := []string{}
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queryValues := []interface{}{}
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valueStrings := []string{}
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for _, field := range record.UniqueFields {
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queryArgs = append(queryArgs, field+"=?")
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queryValues = append(queryValues, record.Values[field])
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valueStrings = append(valueStrings, record.Values[field])
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}
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one, err := db.FindOne("SELECT * FROM "+newTable.Name+" WHERE "+strings.Join(queryArgs, " AND "), queryValues...)
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if err != nil {
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return nil, err
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}
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if one == nil {
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ops = append(ops, "+ record "+newTable.Name+" "+strings.Join(valueStrings, ", "))
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params := []string{}
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args := []string{}
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values := []interface{}{}
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for k, v := range record.Values {
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if k == "id" {
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continue
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}
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params = append(params, "`"+k+"`")
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args = append(args, "?")
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values = append(values, v)
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}
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_, err = db.Exec("INSERT INTO "+newTable.Name+" ("+strings.Join(params, ", ")+") VALUES ("+strings.Join(args, ", ")+")", values...)
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if err != nil {
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return nil, err
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}
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} else if !record.ValuesEquals(one) {
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ops = append(ops, "* record "+newTable.Name+" "+strings.Join(valueStrings, ", "))
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args := []string{}
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values := []interface{}{}
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for k, v := range record.Values {
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if k == "id" {
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continue
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}
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args = append(args, k+"=?")
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values = append(values, v)
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}
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values = append(values, one.GetInt("id"))
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_, err = db.Exec("UPDATE " + newTable.Name + " SET " + strings.Join(args, ", ") + " WHERE id=?", values...)
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if err != nil {
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return nil, err
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}
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}
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}
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}
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// 减少表格
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// 由于我们不删除任何表格，所以这里什么都不做
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return
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}
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// 查找有记录的表
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func (this *SQLDump) findRecordsTable(tableName string) *SQLRecordsTable {
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for _, table := range recordsTables {
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if table.TableName == tableName {
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return table
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}
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}
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return nil
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}
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