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!110 feat: 支持各源数据库导出sql，数据库迁移部分bug修复

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* feat: 各源数据库导出
* fix: 数据库迁移 bug修复
This commit is contained in:
zongyangleo
2024-03-26 09:05:28 +00:00
committed by Coder慌
parent 4b3ed1310d
commit 2acc295259
31 changed files with 821 additions and 424 deletions
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167
server/internal/db/dbm/postgres/metadata.go
View File

@@ -2,6 +2,7 @@ package postgres
import (
"fmt"
"io"
"mayfly-go/internal/db/dbm/dbi"
"mayfly-go/pkg/errorx"
"mayfly-go/pkg/logx"
@@ -114,12 +115,31 @@ func (pd *PgsqlMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error)
NumPrecision: cast.ToInt(re["numPrecision"]),
NumScale: cast.ToInt(re["numScale"]),
}
pd.FixColumn(&column)
columns = append(columns, column)
}
return columns, nil
}
func (pd *PgsqlMetaData) FixColumn(column *dbi.Column) {
dataType := strings.ToLower(string(column.DataType))
// 哪些字段可以指定长度
if !collx.ArrayAnyMatches([]string{"char", "time", "bit", "num", "decimal"}, dataType) {
column.CharMaxLength = 0
column.NumPrecision = 0
} else if strings.Contains(dataType, "char") {
// 如果类型是文本，长度翻倍
column.CharMaxLength = column.CharMaxLength * 2
}
// 如果默认值带冒号，如：'id'::varchar
if column.ColumnDefault != "" && strings.Contains(column.ColumnDefault, "::") && !strings.HasPrefix(column.ColumnDefault, "nextval") {
match := defaultValueRegexp.FindStringSubmatch(column.ColumnDefault)
if len(match) > 1 {
column.ColumnDefault = match[1]
}
}
}
func (pd *PgsqlMetaData) GetPrimaryKey(tablename string) (string, error) {
columns, err := pd.GetColumns(tablename)
if err != nil {
@@ -153,6 +173,7 @@ func (pd *PgsqlMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
IndexComment: cast.ToString(re["indexComment"]),
IsUnique: cast.ToInt(re["isUnique"]) == 1,
SeqInIndex: cast.ToInt(re["seqInIndex"]),
IsPrimaryKey: cast.ToInt(re["isPrimaryKey"]) == 1,
})
}
// 把查询结果以索引名分组，索引字段以逗号连接
@@ -175,30 +196,30 @@ func (pd *PgsqlMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
}
func (pd *PgsqlMetaData) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
meta := pd.dc.GetMetaData()
creates := make([]string, 0)
drops := make([]string, 0)
comments := make([]string, 0)
for _, index := range indexs {
// 通过字段、表名拼接索引名
columnName := strings.ReplaceAll(index.ColumnName, "-", "")
columnName = strings.ReplaceAll(columnName, "_", "")
colName := strings.ReplaceAll(columnName, ",", "_")
keyType := "normal"
unique := ""
if index.IsUnique {
keyType = "unique"
unique = "unique"
}
indexName := fmt.Sprintf("%s_key_%s_%s", keyType, tableInfo.TableName, colName)
// 如果索引名存在，先删除索引
drops = append(drops, fmt.Sprintf("drop index if exists %s.%s", pd.dc.Info.CurrentSchema(), indexName))
drops = append(drops, fmt.Sprintf("drop index if exists %s.%s", pd.dc.Info.CurrentSchema(), index.IndexName))
// 取出列名，添加引号
cols := strings.Split(index.ColumnName, ",")
colNames := make([]string, len(cols))
for i, name := range cols {
colNames[i] = meta.QuoteIdentifier(name)
}
// 创建索引
creates = append(creates, fmt.Sprintf("CREATE %s INDEX %s on %s.%s(%s)", unique, indexName, pd.dc.Info.CurrentSchema(), tableInfo.TableName, index.ColumnName))
creates = append(creates, fmt.Sprintf("CREATE %s INDEX %s on %s.%s(%s)", unique, index.IndexName, pd.dc.Info.CurrentSchema(), tableInfo.TableName, strings.Join(colNames, ",")))
if index.IndexComment != "" {
comments = append(comments, fmt.Sprintf("COMMENT ON INDEX %s.%s IS '%s'", pd.dc.Info.CurrentSchema(), indexName, index.IndexComment))
comment := meta.QuoteEscape(index.IndexComment)
comments = append(comments, fmt.Sprintf("COMMENT ON INDEX %s.%s IS '%s'", pd.dc.Info.CurrentSchema(), index.IndexName, comment))
}
}
@@ -222,6 +243,12 @@ func (pd *PgsqlMetaData) genColumnBasicSql(column dbi.Column) string {
colName := meta.QuoteIdentifier(column.ColumnName)
dataType := string(column.DataType)
// 如果数据类型是数字，则去掉长度
if collx.ArrayAnyMatches([]string{"int"}, strings.ToLower(dataType)) {
column.NumPrecision = 0
column.CharMaxLength = 0
}
// 如果是自增类型，需要转换为serial
if column.IsIdentity {
if dataType == "int4" {
@@ -240,31 +267,16 @@ func (pd *PgsqlMetaData) genColumnBasicSql(column dbi.Column) string {
nullAble := ""
if !column.Nullable {
nullAble = " NOT NULL"
// 如果字段不能为空，则设置默认值
if column.ColumnDefault == "" {
if collx.ArrayAnyMatches([]string{"char", "text", "lob"}, strings.ToLower(dataType)) {
// 文本默认值为空字符串
column.ColumnDefault = " "
} else if collx.ArrayAnyMatches([]string{"int", "num"}, strings.ToLower(dataType)) {
// 数字默认值为0
column.ColumnDefault = "0"
}
}
}
defVal := "" // 默认值需要判断引号，如函数是不需要引号的 // 为了防止跨源函数不支持 当默认值是函数时，不需要设置默认值
if column.ColumnDefault != "" && !strings.Contains(column.ColumnDefault, "(") {
// 哪些字段类型默认值需要加引号
mark := false
// 哪些字段类型默认值需要加引号
if collx.ArrayAnyMatches([]string{"char", "text", "date", "time", "lob"}, dataType) {
// 如果是文本类型，则默认值不能带括号
if collx.ArrayAnyMatches([]string{"char", "text", "lob"}, dataType) {
column.ColumnDefault = ""
}
// 当数据类型是日期时间，默认值是日期时间函数时，默认值不需要引号
if collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(dataType)) &&
collx.ArrayAnyMatches([]string{"DATE", "TIME"}, strings.ToUpper(column.ColumnDefault)) {
collx.ArrayAnyMatches([]string{"date", "time"}, strings.ToLower(column.ColumnDefault)) {
mark = false
} else {
mark = true
@@ -275,30 +287,31 @@ func (pd *PgsqlMetaData) genColumnBasicSql(column dbi.Column) string {
column.ColumnDefault = "CURRENT_TIMESTAMP"
}
if column.ColumnDefault != "" {
if mark {
defVal = fmt.Sprintf(" DEFAULT '%s'", column.ColumnDefault)
} else {
defVal = fmt.Sprintf(" DEFAULT %s", column.ColumnDefault)
}
if mark {
defVal = fmt.Sprintf(" DEFAULT '%s'", column.ColumnDefault)
} else {
defVal = fmt.Sprintf(" DEFAULT %s", column.ColumnDefault)
}
}
columnSql := fmt.Sprintf(" %s %s %s %s ", colName, column.GetColumnType(), nullAble, defVal)
// 如果是varchar，长度翻倍，防止报错
if collx.ArrayAnyMatches([]string{"char"}, strings.ToLower(dataType)) {
column.CharMaxLength = column.CharMaxLength * 2
}
columnSql := fmt.Sprintf(" %s %s%s%s", colName, column.GetColumnType(), nullAble, defVal)
return columnSql
}
func (pd *PgsqlMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
meta := pd.dc.GetMetaData()
replacer := strings.NewReplacer(";", "", "'", "")
quoteTableName := meta.QuoteIdentifier(tableInfo.TableName)
sqlArr := make([]string, 0)
if dropBeforeCreate {
sqlArr = append(sqlArr, fmt.Sprintf("DROP TABLE IF EXISTS %s", meta.QuoteIdentifier(tableInfo.TableName)))
sqlArr = append(sqlArr, fmt.Sprintf("DROP TABLE IF EXISTS %s", quoteTableName))
}
// 组装建表语句
createSql := fmt.Sprintf("CREATE TABLE %s (\n", meta.QuoteIdentifier(tableInfo.TableName))
createSql := fmt.Sprintf("CREATE TABLE %s (\n", quoteTableName)
fields := make([]string, 0)
pks := make([]string, 0)
columnComments := make([]string, 0)
@@ -313,8 +326,8 @@ func (pd *PgsqlMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Ta
// 防止注释内含有特殊字符串导致sql出错
if column.ColumnComment != "" {
comment := replacer.Replace(column.ColumnComment)
columnComments = append(columnComments, fmt.Sprintf(commentTmp, column.TableName, column.ColumnName, comment))
comment := meta.QuoteEscape(column.ColumnComment)
columnComments = append(columnComments, fmt.Sprintf(commentTmp, quoteTableName, meta.QuoteIdentifier(column.ColumnName), comment))
}
}
@@ -322,12 +335,12 @@ func (pd *PgsqlMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Ta
if len(pks) > 0 {
createSql += fmt.Sprintf(", \nPRIMARY KEY (%s)", strings.Join(pks, ","))
}
createSql += ")"
createSql += "\n)"
tableCommentSql := ""
if tableInfo.TableComment != "" {
commentTmp := "comment on table %s is '%s'"
tableCommentSql = fmt.Sprintf(commentTmp, tableInfo.TableName, replacer.Replace(tableInfo.TableComment))
tableCommentSql = fmt.Sprintf(commentTmp, quoteTableName, meta.QuoteEscape(tableInfo.TableComment))
}
// create
@@ -346,13 +359,12 @@ func (pd *PgsqlMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Ta
}
// 获取建表ddl
func (pd *PgsqlMetaData) GetTableDDL(tableName string) (string, error) {
func (pd *PgsqlMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (string, error) {
// 1.获取表信息
tbs, err := pd.GetTables(tableName)
tableInfo := &dbi.Table{}
if err != nil && len(tbs) > 0 {
if err != nil || tbs == nil || len(tbs) <= 0 {
logx.Errorf("获取表信息失败, %s", tableName)
return "", err
}
@@ -365,7 +377,7 @@ func (pd *PgsqlMetaData) GetTableDDL(tableName string) (string, error) {
logx.Errorf("获取列信息失败, %s", tableName)
return "", err
}
tableDDLArr := pd.GenerateTableDDL(columns, *tableInfo, false)
tableDDLArr := pd.GenerateTableDDL(columns, *tableInfo, dropBeforeCreate)
// 3.获取索引信息
indexs, err := pd.GetTableIndex(tableName)
if err != nil {
@@ -404,6 +416,19 @@ func (pd *PgsqlMetaData) DefaultDb() string {
}
}
func (pd *PgsqlMetaData) AfterDumpInsert(writer io.Writer, tableName string, columns []dbi.Column) {
// 设置自增序列当前值
for _, column := range columns {
if column.IsIdentity {
seq := fmt.Sprintf("SELECT setval('%s_%s_seq', (SELECT max(%s) FROM %s));\n", tableName, column.ColumnName, column.ColumnName, tableName)
writer.Write([]byte(seq))
}
}
writer.Write([]byte("COMMIT;\n"))
}
func (pd *PgsqlMetaData) GetDataConverter() dbi.DataConverter {
return converter
}
@@ -417,8 +442,9 @@ var (
dateRegexp = regexp.MustCompile(`(?i)date`)
// 时间类型
timeRegexp = regexp.MustCompile(`(?i)time`)
// 定义正则表达式，匹配括号内的数字
bracketsRegexp = regexp.MustCompile(`\((\d+)\)`)
// 提取pg默认值， 如：'id'::varchar 提取id ； '-1'::integer 提取-1
defaultValueRegexp = regexp.MustCompile(`'([^']*)'`)
converter = new(DataConverter)
@@ -497,13 +523,28 @@ func (dc *DataConverter) FormatData(dbColumnValue any, dataType dbi.DataType) st
str := fmt.Sprintf("%v", dbColumnValue)
switch dataType {
case dbi.DataTypeDateTime: // "2024-01-02T22:16:28.545377+08:00"
res, _ := time.Parse(time.RFC3339, str)
// 尝试用时间格式解析
res, err := time.Parse(time.DateTime, str)
if err == nil {
return str
}
res, err = time.Parse(time.RFC3339, str)
return res.Format(time.DateTime)
case dbi.DataTypeDate: // "2024-01-02T00:00:00Z"
res, _ := time.Parse(time.RFC3339, str)
// 尝试用时间格式解析
res, err := time.Parse(time.DateOnly, str)
if err == nil {
return str
}
res, _ = time.Parse(time.RFC3339, str)
return res.Format(time.DateOnly)
case dbi.DataTypeTime: // "0000-01-01T22:16:28.545075+08:00"
res, _ := time.Parse(time.RFC3339, str)
// 尝试用时间格式解析
res, err := time.Parse(time.TimeOnly, str)
if err == nil {
return str
}
res, _ = time.Parse(time.RFC3339, str)
return res.Format(time.TimeOnly)
}
return cast.ToString(dbColumnValue)
@@ -526,3 +567,23 @@ func (dc *DataConverter) ParseData(dbColumnValue any, dataType dbi.DataType) any
}
return dbColumnValue
}
func (dc *DataConverter) WrapValue(dbColumnValue any, dataType dbi.DataType) string {
if dbColumnValue == nil {
return "NULL"
}
switch dataType {
case dbi.DataTypeNumber:
return fmt.Sprintf("%v", dbColumnValue)
case dbi.DataTypeString:
val := fmt.Sprintf("%v", dbColumnValue)
// 转义单引号
val = strings.Replace(val, `'`, `''`, -1)
// 转义换行符
val = strings.Replace(val, "\n", "\\n", -1)
return fmt.Sprintf("'%s'", val)
case dbi.DataTypeDate, dbi.DataTypeDateTime, dbi.DataTypeTime:
return fmt.Sprintf("'%s'", dc.FormatData(dbColumnValue, dataType))
}
return fmt.Sprintf("'%s'", dbColumnValue)
}