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refactor: dbm重构、调整metadata与dialect接口

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This commit is contained in:
meilin.huang
2024-11-01 17:27:22 +08:00
parent af14be9801
commit 74ae031853
36 changed files with 1216 additions and 1384 deletions
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175
server/internal/db/dbm/mysql/metadata.go
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@@ -10,7 +10,6 @@ import (
"mayfly-go/pkg/utils/stringx"
"strings"
// "github.com/kanzihuang/vitess/go/vt/sqlparser"
"github.com/may-fly/cast"
)
@@ -22,13 +21,13 @@ const (
MYSQL_COLUMN_MA_KEY = "MYSQL_COLUMN_MA"
)
type MysqlMetaData struct {
dbi.DefaultMetaData
type MysqlMetadata struct {
dbi.DefaultMetadata
dc *dbi.DbConn
}
func (md *MysqlMetaData) GetDbServer() (*dbi.DbServer, error) {
func (md *MysqlMetadata) GetDbServer() (*dbi.DbServer, error) {
_, res, err := md.dc.Query("SELECT VERSION() version")
if err != nil {
return nil, err
@@ -39,7 +38,7 @@ func (md *MysqlMetaData) GetDbServer() (*dbi.DbServer, error) {
return ds, nil
}
func (md *MysqlMetaData) GetDbNames() ([]string, error) {
func (md *MysqlMetadata) GetDbNames() ([]string, error) {
_, res, err := md.dc.Query(dbi.GetLocalSql(MYSQL_META_FILE, MYSQL_DBS))
if err != nil {
return nil, err
@@ -52,10 +51,10 @@ func (md *MysqlMetaData) GetDbNames() ([]string, error) {
return databases, nil
}
func (md *MysqlMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
meta := md.dc.GetMetaData()
func (md *MysqlMetadata) GetTables(tableNames ...string) ([]dbi.Table, error) {
dialect := md.dc.GetDialect()
names := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
return fmt.Sprintf("'%s'", meta.RemoveQuote(val))
return fmt.Sprintf("'%s'", dialect.RemoveQuote(val))
}), ",")
var res []map[string]any
@@ -86,11 +85,11 @@ func (md *MysqlMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
}
// 获取列元信息, 如列名等
func (md *MysqlMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
meta := md.dc.GetMetaData()
columnHelper := meta.GetColumnHelper()
func (md *MysqlMetadata) GetColumns(tableNames ...string) ([]dbi.Column, error) {
dialect := md.dc.GetDialect()
columnHelper := dialect.GetColumnHelper()
tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
return fmt.Sprintf("'%s'", meta.RemoveQuote(val))
return fmt.Sprintf("'%s'", dialect.RemoveQuote(val))
}), ",")
_, res, err := md.dc.Query(fmt.Sprintf(dbi.GetLocalSql(MYSQL_META_FILE, MYSQL_COLUMN_MA_KEY), tableName))
@@ -122,7 +121,7 @@ func (md *MysqlMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error)
}
// 获取表主键字段名，不存在主键标识则默认第一个字段
func (md *MysqlMetaData) GetPrimaryKey(tablename string) (string, error) {
func (md *MysqlMetadata) GetPrimaryKey(tablename string) (string, error) {
columns, err := md.GetColumns(tablename)
if err != nil {
return "", err
@@ -141,7 +140,7 @@ func (md *MysqlMetaData) GetPrimaryKey(tablename string) (string, error) {
}
// 获取表索引信息
func (md *MysqlMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
func (md *MysqlMetadata) GetTableIndex(tableName string) ([]dbi.Index, error) {
_, res, err := md.dc.Query(dbi.GetLocalSql(MYSQL_META_FILE, MYSQL_INDEX_INFO_KEY), tableName)
if err != nil {
return nil, err
@@ -178,124 +177,8 @@ func (md *MysqlMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
return result, nil
}
// 获取建索引ddl
func (md *MysqlMetaData) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
meta := md.dc.GetMetaData()
sqlArr := make([]string, 0)
for _, index := range indexs {
unique := ""
if index.IsUnique {
unique = "unique"
}
// 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)
}
sqlTmp := "ALTER TABLE %s ADD %s INDEX %s(%s) USING BTREE"
sqlStr := fmt.Sprintf(sqlTmp, meta.QuoteIdentifier(tableInfo.TableName), unique, meta.QuoteIdentifier(index.IndexName), strings.Join(colNames, ","))
comment := meta.QuoteEscape(index.IndexComment)
if comment != "" {
sqlStr += fmt.Sprintf(" COMMENT '%s'", comment)
}
sqlArr = append(sqlArr, sqlStr)
}
return sqlArr
}
func (md *MysqlMetaData) genColumnBasicSql(column dbi.Column) string {
meta := md.dc.GetMetaData()
dataType := string(column.DataType)
incr := ""
if column.IsIdentity {
incr = " AUTO_INCREMENT"
}
nullAble := ""
if !column.Nullable {
nullAble = " NOT NULL"
}
columnType := column.GetColumnType()
if nullAble == "" && strings.Contains(columnType, "timestamp") {
nullAble = " NULL"
}
defVal := "" // 默认值需要判断引号，如函数是不需要引号的
if column.ColumnDefault != "" &&
// 当默认值是字符串'NULL'时，不需要设置默认值
column.ColumnDefault != "NULL" &&
// 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
!strings.Contains(column.ColumnDefault, "(") {
// 哪些字段类型默认值需要加引号
mark := false
if collx.ArrayAnyMatches([]string{"char", "text", "date", "time", "lob"}, strings.ToLower(dataType)) {
// 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)) {
mark = false
} else {
mark = true
}
}
if mark {
defVal = fmt.Sprintf(" DEFAULT '%s'", column.ColumnDefault)
} else {
defVal = fmt.Sprintf(" DEFAULT %s", column.ColumnDefault)
}
}
comment := ""
if column.ColumnComment != "" {
// 防止注释内含有特殊字符串导致sql出错
commentStr := meta.QuoteEscape(column.ColumnComment)
comment = fmt.Sprintf(" COMMENT '%s'", commentStr)
}
columnSql := fmt.Sprintf(" %s %s%s%s%s%s", md.dc.GetMetaData().QuoteIdentifier(column.ColumnName), columnType, nullAble, incr, defVal, comment)
return columnSql
}
// 获取建表ddl
func (md *MysqlMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
meta := md.dc.GetMetaData()
sqlArr := make([]string, 0)
if dropBeforeCreate {
sqlArr = append(sqlArr, fmt.Sprintf("DROP TABLE IF EXISTS %s", meta.QuoteIdentifier(tableInfo.TableName)))
}
// 组装建表语句
createSql := fmt.Sprintf("CREATE TABLE %s (\n", meta.QuoteIdentifier(tableInfo.TableName))
fields := make([]string, 0)
pks := make([]string, 0)
for _, column := range columns {
if column.IsPrimaryKey {
pks = append(pks, column.ColumnName)
}
fields = append(fields, md.genColumnBasicSql(column))
}
// 建表ddl
createSql += strings.Join(fields, ",\n")
if len(pks) > 0 {
createSql += fmt.Sprintf(", \nPRIMARY KEY (%s)", strings.Join(pks, ","))
}
createSql += "\n)"
// 表注释
if tableInfo.TableComment != "" {
createSql += fmt.Sprintf(" COMMENT '%s'", meta.QuoteEscape(tableInfo.TableComment))
}
sqlArr = append(sqlArr, createSql)
return sqlArr
}
// 获取建表ddl
func (md *MysqlMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (string, error) {
func (md *MysqlMetadata) GetTableDDL(tableName string, dropBeforeCreate bool) (string, error) {
// 1.获取表信息
tbs, err := md.GetTables(tableName)
tableInfo := &dbi.Table{}
@@ -312,7 +195,9 @@ func (md *MysqlMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (s
logx.Errorf("获取列信息失败, %s", tableName)
return "", err
}
tableDDLArr := md.GenerateTableDDL(columns, *tableInfo, dropBeforeCreate)
dialect := md.dc.GetDialect()
tableDDLArr := dialect.GenerateTableDDL(columns, *tableInfo, dropBeforeCreate)
// 3.获取索引信息
indexs, err := md.GetTableIndex(tableName)
if err != nil {
@@ -320,32 +205,10 @@ func (md *MysqlMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (s
return "", err
}
// 组装返回
tableDDLArr = append(tableDDLArr, md.GenerateIndexDDL(indexs, *tableInfo)...)
tableDDLArr = append(tableDDLArr, dialect.GenerateIndexDDL(indexs, *tableInfo)...)
return strings.Join(tableDDLArr, ";\n"), nil
}
func (md *MysqlMetaData) GetSchemas() ([]string, error) {
func (md *MysqlMetadata) GetSchemas() ([]string, error) {
return nil, errors.New("不支持schema")
}
func (md *MysqlMetaData) GetIdentifierQuoteString() string {
return "`"
}
func (md *MysqlMetaData) QuoteLiteral(literal string) string {
literal = strings.ReplaceAll(literal, `\`, `\\`)
literal = strings.ReplaceAll(literal, `'`, `''`)
return "'" + literal + "'"
}
// func (md *MysqlMetaData) GetSqlParserDialect() sqlparser.Dialect {
// return sqlparser.MysqlDialect{}
// }
func (md *MysqlMetaData) GetDataHelper() dbi.DataHelper {
return new(DataHelper)
}
func (md *MysqlMetaData) GetColumnHelper() dbi.ColumnHelper {
return new(ColumnHelper)
}