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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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154
server/internal/db/dbm/dm/metadata.go
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@@ -21,13 +21,13 @@ const (
DM_COLUMN_MA_KEY = "DM_COLUMN_MA"
)
type DMMetaData struct {
dbi.DefaultMetaData
type DMMetadata struct {
dbi.DefaultMetadata
dc *dbi.DbConn
}
func (dd *DMMetaData) GetDbServer() (*dbi.DbServer, error) {
func (dd *DMMetadata) GetDbServer() (*dbi.DbServer, error) {
_, res, err := dd.dc.Query("select * from v$instance")
if err != nil {
return nil, err
@@ -38,7 +38,7 @@ func (dd *DMMetaData) GetDbServer() (*dbi.DbServer, error) {
return ds, nil
}
func (dd *DMMetaData) GetDbNames() ([]string, error) {
func (dd *DMMetadata) GetDbNames() ([]string, error) {
_, res, err := dd.dc.Query("SELECT name AS DBNAME FROM v$database")
if err != nil {
return nil, err
@@ -52,9 +52,10 @@ func (dd *DMMetaData) GetDbNames() ([]string, error) {
return databases, nil
}
func (dd *DMMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
func (dd *DMMetadata) GetTables(tableNames ...string) ([]dbi.Table, error) {
dialect := dd.dc.GetDialect()
names := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
return fmt.Sprintf("'%s'", dbi.RemoveQuote(dd, val))
return fmt.Sprintf("'%s'", dialect.RemoveQuote(val))
}), ",")
var res []map[string]any
@@ -85,9 +86,10 @@ func (dd *DMMetaData) GetTables(tableNames ...string) ([]dbi.Table, error) {
}
// 获取列元信息, 如列名等
func (dd *DMMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
func (dd *DMMetadata) GetColumns(tableNames ...string) ([]dbi.Column, error) {
dialect := dd.dc.GetDialect()
tableName := strings.Join(collx.ArrayMap[string, string](tableNames, func(val string) string {
return fmt.Sprintf("'%s'", dbi.RemoveQuote(dd, val))
return fmt.Sprintf("'%s'", dialect.RemoveQuote(val))
}), ",")
_, res, err := dd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(DM_META_FILE, DM_COLUMN_MA_KEY), tableName))
@@ -95,7 +97,7 @@ func (dd *DMMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
return nil, err
}
columnHelper := dd.dc.GetMetaData().GetColumnHelper()
columnHelper := dd.dc.GetDialect().GetColumnHelper()
columns := make([]dbi.Column, 0)
for _, re := range res {
column := dbi.Column{
@@ -117,7 +119,7 @@ func (dd *DMMetaData) GetColumns(tableNames ...string) ([]dbi.Column, error) {
return columns, nil
}
func (dd *DMMetaData) GetPrimaryKey(tablename string) (string, error) {
func (dd *DMMetadata) GetPrimaryKey(tablename string) (string, error) {
columns, err := dd.GetColumns(tablename)
if err != nil {
return "", err
@@ -135,7 +137,7 @@ func (dd *DMMetaData) GetPrimaryKey(tablename string) (string, error) {
}
// 获取表索引信息
func (dd *DMMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
func (dd *DMMetadata) GetTableIndex(tableName string) ([]dbi.Index, error) {
_, res, err := dd.dc.Query(fmt.Sprintf(dbi.GetLocalSql(DM_META_FILE, DM_INDEX_INFO_KEY), tableName))
if err != nil {
return nil, err
@@ -172,117 +174,8 @@ func (dd *DMMetaData) GetTableIndex(tableName string) ([]dbi.Index, error) {
return result, nil
}
func (dd *DMMetaData) genColumnBasicSql(column dbi.Column) string {
meta := dd.dc.GetMetaData()
colName := meta.QuoteIdentifier(column.ColumnName)
dataType := string(column.DataType)
incr := ""
if column.IsIdentity {
incr = " IDENTITY"
}
nullAble := ""
if !column.Nullable {
nullAble = " NOT NULL"
}
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
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)
}
}
columnSql := fmt.Sprintf(" %s %s%s%s%s", colName, column.GetColumnType(), incr, nullAble, defVal)
return columnSql
}
func (dd *DMMetaData) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
meta := dd.dc.GetMetaData()
sqls := 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)
}
sqls = append(sqls, fmt.Sprintf("create %s index %s on %s(%s)", unique, meta.QuoteIdentifier(index.IndexName), meta.QuoteIdentifier(tableInfo.TableName), strings.Join(colNames, ",")))
}
return sqls
}
func (dd *DMMetaData) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
meta := dd.dc.GetMetaData()
tbName := meta.QuoteIdentifier(tableInfo.TableName)
sqlArr := make([]string, 0)
if dropBeforeCreate {
sqlArr = append(sqlArr, fmt.Sprintf("drop table if exists %s", tbName))
}
// 组装建表语句
createSql := fmt.Sprintf("create table %s (", tbName)
fields := make([]string, 0)
pks := make([]string, 0)
columnComments := make([]string, 0)
for _, column := range columns {
if column.IsPrimaryKey {
pks = append(pks, meta.QuoteIdentifier(column.ColumnName))
}
fields = append(fields, dd.genColumnBasicSql(column))
if column.ColumnComment != "" {
comment := meta.QuoteEscape(column.ColumnComment)
columnComments = append(columnComments, fmt.Sprintf("comment on column %s.%s is '%s'", tbName, meta.QuoteIdentifier(column.ColumnName), comment))
}
}
createSql += strings.Join(fields, ",\n")
if len(pks) > 0 {
createSql += fmt.Sprintf(",\n PRIMARY KEY (%s)", strings.Join(pks, ","))
}
createSql += "\n)"
tableCommentSql := ""
if tableInfo.TableComment != "" {
comment := meta.QuoteEscape(tableInfo.TableComment)
tableCommentSql = fmt.Sprintf("comment on table %s is '%s'", tbName, comment)
}
sqlArr = append(sqlArr, createSql)
if tableCommentSql != "" {
sqlArr = append(sqlArr, tableCommentSql)
}
if len(columnComments) > 0 {
sqlArr = append(sqlArr, columnComments...)
}
return sqlArr
}
// 获取建表ddl
func (dd *DMMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (string, error) {
func (dd *DMMetadata) GetTableDDL(tableName string, dropBeforeCreate bool) (string, error) {
// 1.获取表信息
tbs, err := dd.GetTables(tableName)
@@ -300,7 +193,8 @@ func (dd *DMMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (stri
logx.Errorf("获取列信息失败, %s", tableName)
return "", err
}
tableDDLArr := dd.GenerateTableDDL(columns, *tableInfo, dropBeforeCreate)
dialect := dd.dc.GetDialect()
tableDDLArr := dialect.GenerateTableDDL(columns, *tableInfo, dropBeforeCreate)
// 3.获取索引信息
indexs, err := dd.GetTableIndex(tableName)
if err != nil {
@@ -308,12 +202,12 @@ func (dd *DMMetaData) GetTableDDL(tableName string, dropBeforeCreate bool) (stri
return "", err
}
// 组装返回
tableDDLArr = append(tableDDLArr, dd.GenerateIndexDDL(indexs, *tableInfo)...)
tableDDLArr = append(tableDDLArr, dialect.GenerateIndexDDL(indexs, *tableInfo)...)
return strings.Join(tableDDLArr, ";\n"), nil
}
// 获取DM当前连接的库可访问的schemaNames
func (dd *DMMetaData) GetSchemas() ([]string, error) {
func (dd *DMMetadata) GetSchemas() ([]string, error) {
sql := dbi.GetLocalSql(DM_META_FILE, DM_DB_SCHEMAS)
_, res, err := dd.dc.Query(sql)
if err != nil {
@@ -325,15 +219,3 @@ func (dd *DMMetaData) GetSchemas() ([]string, error) {
}
return schemaNames, nil
}
func (dd *DMMetaData) GetDataHelper() dbi.DataHelper {
return new(DataHelper)
}
func (dd *DMMetaData) GetColumnHelper() dbi.ColumnHelper {
return new(ColumnHelper)
}
func (dd *DMMetaData) GetDumpHelper() dbi.DumpHelper {
return new(DumpHelper)
}