mirror of
https://gitee.com/dromara/mayfly-go
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291 lines
8.8 KiB
Go
291 lines
8.8 KiB
Go
package oracle
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import (
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"database/sql"
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"fmt"
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"mayfly-go/internal/db/dbm/dbi"
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"mayfly-go/pkg/logx"
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"mayfly-go/pkg/utils/collx"
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"strings"
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"time"
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_ "gitee.com/chunanyong/dm"
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)
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type OracleDialect struct {
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dbi.DefaultDialect
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dc *dbi.DbConn
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}
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func (od *OracleDialect) BatchInsert(tx *sql.Tx, tableName string, columns []string, values [][]any, duplicateStrategy int) (int64, error) {
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if len(values) <= 0 {
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return 0, nil
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}
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// 把二维数组转为一维数组
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var args []any
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for _, v := range values {
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args = append(args, v...)
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}
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if duplicateStrategy == dbi.DuplicateStrategyNone || duplicateStrategy == 0 || duplicateStrategy == dbi.DuplicateStrategyIgnore {
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return od.batchInsertSimple(tableName, columns, values, duplicateStrategy, tx)
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} else {
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return od.batchInsertMergeSql(tableName, columns, values, args, tx)
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}
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}
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// 简单批量插入sql，无需判断键冲突策略
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func (od *OracleDialect) batchInsertSimple(tableName string, columns []string, values [][]any, duplicateStrategy int, tx *sql.Tx) (int64, error) {
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metadata := od.dc.GetMetadata()
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// 忽略键冲突策略
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ignore := ""
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if duplicateStrategy == dbi.DuplicateStrategyIgnore {
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// 查出唯一索引涉及的字段
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indexs, _ := metadata.GetTableIndex(tableName)
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if indexs != nil {
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arr := make([]string, 0)
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for _, index := range indexs {
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if index.IsUnique {
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cols := strings.Split(index.ColumnName, ",")
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for _, col := range cols {
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if !collx.ArrayContains(arr, col) {
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arr = append(arr, col)
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}
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}
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}
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}
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ignore = fmt.Sprintf("/*+ IGNORE_ROW_ON_DUPKEY_INDEX(%s(%s)) */", tableName, strings.Join(arr, ","))
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}
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}
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quote := od.Quoter().Quote
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effRows := 0
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for _, value := range values {
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// 拼接带占位符的sql oracle的占位符是:1,:2,:3....
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var placeholder []string
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for i := 0; i < len(value); i++ {
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placeholder = append(placeholder, fmt.Sprintf(":%d", i+1))
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}
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sqlTemp := fmt.Sprintf("INSERT %s INTO %s (%s) VALUES (%s)", ignore, quote(tableName), strings.Join(columns, ","), strings.Join(placeholder, ","))
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// oracle数据库为了兼容ignore主键冲突，只能一条条的执行insert
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res, err := od.dc.TxExec(tx, sqlTemp, value...)
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if err != nil {
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logx.Errorf("执行sql失败：%s, sql: [ %s ]", err.Error(), sqlTemp)
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}
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effRows += int(res)
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}
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return int64(effRows), nil
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}
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func (od *OracleDialect) batchInsertMergeSql(tableName string, columns []string, values [][]any, args []any, tx *sql.Tx) (int64, error) {
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// 查询主键字段
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uniqueCols := make([]string, 0)
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caseSqls := make([]string, 0)
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metadata := od.dc.GetMetadata()
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quote := od.Quoter().Quote
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// 查询唯一索引涉及到的字段，并组装到match条件内
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indexs, _ := metadata.GetTableIndex(tableName)
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if indexs != nil {
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for _, index := range indexs {
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if index.IsUnique {
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cols := strings.Split(index.ColumnName, ",")
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tmp := make([]string, 0)
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for _, col := range cols {
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if !collx.ArrayContains(uniqueCols, col) {
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uniqueCols = append(uniqueCols, col)
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}
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tmp = append(tmp, fmt.Sprintf(" T1.%s = T2.%s ", quote(col), quote(col)))
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}
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caseSqls = append(caseSqls, fmt.Sprintf("( %s )", strings.Join(tmp, " AND ")))
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}
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}
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}
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// 如果caseSqls为空，则说明没有唯一键，直接使用简单批量插入
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if len(caseSqls) == 0 {
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return od.batchInsertSimple(tableName, columns, values, dbi.DuplicateStrategyNone, tx)
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}
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// 重复数据处理策略
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insertVals := make([]string, 0)
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upds := make([]string, 0)
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insertCols := make([]string, 0)
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quoteTrim := od.Quoter().Trim
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for _, column := range columns {
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if !collx.ArrayContains(uniqueCols, quoteTrim(column)) {
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upds = append(upds, fmt.Sprintf("T1.%s = T2.%s", column, column))
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}
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insertCols = append(insertCols, fmt.Sprintf("T1.%s", column))
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insertVals = append(insertVals, fmt.Sprintf("T2.%s", column))
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}
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// 生成源数据占位sql
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t2s := make([]string, 0)
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// 拼接带占位符的sql oracle的占位符是:1,:2,:3....
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for i := 0; i < len(args); i += len(columns) {
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var placeholder []string
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for j := 0; j < len(columns); j++ {
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col := columns[j]
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placeholder = append(placeholder, fmt.Sprintf(":%d %s", i+j+1, col))
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}
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t2s = append(t2s, fmt.Sprintf("SELECT %s FROM dual", strings.Join(placeholder, ", ")))
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}
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t2 := strings.Join(t2s, " UNION ALL ")
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sqlTemp := "MERGE INTO " + quote(tableName) + " T1 USING (" + t2 + ") T2 ON (" + strings.Join(caseSqls, " OR ") + ") "
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sqlTemp += "WHEN NOT MATCHED THEN INSERT (" + strings.Join(insertCols, ",") + ") VALUES (" + strings.Join(insertVals, ",") + ") "
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sqlTemp += "WHEN MATCHED THEN UPDATE SET " + strings.Join(upds, ",")
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// 执行批量insert sql
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res, err := od.dc.TxExec(tx, sqlTemp, args...)
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if err != nil {
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logx.Errorf("执行sql失败：%s, sql: [ %s ]", err.Error(), sqlTemp)
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}
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return res, err
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}
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func (od *OracleDialect) CopyTable(copy *dbi.DbCopyTable) error {
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// 生成新表名,为老表明+_copy_时间戳
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newTableName := strings.ToUpper(copy.TableName + "_copy_" + time.Now().Format("20060102150405"))
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condition := ""
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if !copy.CopyData {
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condition = " where 1 = 2"
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}
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_, err := od.dc.Exec(fmt.Sprintf("create table \"%s\" as select * from \"%s\" %s", newTableName, copy.TableName, condition))
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return err
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}
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// 获取建表ddl
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func (od *OracleDialect) GenerateTableDDL(columns []dbi.Column, tableInfo dbi.Table, dropBeforeCreate bool) []string {
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quote := od.Quoter().Quote
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quoteTableName := quote(tableInfo.TableName)
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sqlArr := make([]string, 0)
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if dropBeforeCreate {
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dropSqlTmp := `
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declare
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num number;
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begin
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select count(1) into num from user_tables where table_name = '%s' and owner = (SELECT sys_context('USERENV', 'CURRENT_SCHEMA') FROM dual) ;
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if num > 0 then
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execute immediate 'drop table "%s"' ;
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end if;
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end`
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sqlArr = append(sqlArr, fmt.Sprintf(dropSqlTmp, tableInfo.TableName, tableInfo.TableName))
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}
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// 组装建表语句
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createSql := fmt.Sprintf("CREATE TABLE %s ( \n", quoteTableName)
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fields := make([]string, 0)
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pks := make([]string, 0)
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columnComments := make([]string, 0)
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// 把通用类型转换为达梦类型
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for _, column := range columns {
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if column.IsPrimaryKey {
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pks = append(pks, quote(column.ColumnName))
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}
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fields = append(fields, od.genColumnBasicSql(column))
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// 防止注释内含有特殊字符串导致sql出错
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if column.ColumnComment != "" {
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comment := dbi.QuoteEscape(column.ColumnComment)
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columnComments = append(columnComments, fmt.Sprintf("COMMENT ON COLUMN %s.%s IS '%s'", quoteTableName, quote(column.ColumnName), comment))
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}
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}
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// 建表
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createSql += strings.Join(fields, ",\n")
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if len(pks) > 0 {
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createSql += fmt.Sprintf(", \nPRIMARY KEY (%s)", strings.Join(pks, ","))
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}
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createSql += "\n)"
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sqlArr = append(sqlArr, createSql)
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// 表注释
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tableCommentSql := ""
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if tableInfo.TableComment != "" {
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tableCommentSql = fmt.Sprintf("COMMENT ON TABLE %s is '%s'", quote(tableInfo.TableName), dbi.QuoteEscape(tableInfo.TableComment))
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sqlArr = append(sqlArr, tableCommentSql)
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}
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// 列注释
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if len(columnComments) > 0 {
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sqlArr = append(sqlArr, columnComments...)
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}
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otherSql := od.GenerateTableOtherDDL(tableInfo, quoteTableName, columns)
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if len(otherSql) > 0 {
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sqlArr = append(sqlArr, otherSql...)
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}
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return sqlArr
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}
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// 获取建索引ddl
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func (od *OracleDialect) GenerateIndexDDL(indexs []dbi.Index, tableInfo dbi.Table) []string {
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sqls := make([]string, 0)
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comments := make([]string, 0)
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quote := od.Quoter().Quote
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for _, index := range indexs {
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unique := ""
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if index.IsUnique {
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unique = "unique"
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}
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// 取出列名，添加引号
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cols := strings.Split(index.ColumnName, ",")
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colNames := make([]string, len(cols))
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for i, name := range cols {
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colNames[i] = quote(name)
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}
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sqls = append(sqls, fmt.Sprintf("CREATE %s INDEX %s ON %s(%s)", unique, quote(index.IndexName), quote(tableInfo.TableName), strings.Join(colNames, ",")))
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}
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sqlArr := make([]string, 0)
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sqlArr = append(sqlArr, sqls...)
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if len(comments) > 0 {
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sqlArr = append(sqlArr, comments...)
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}
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return sqlArr
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}
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// 11g及以下版本会设置自增序列
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func (od *OracleDialect) GenerateTableOtherDDL(tableInfo dbi.Table, quoteTableName string, columns []dbi.Column) []string {
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return nil
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}
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func (od *OracleDialect) GetSQLGenerator() dbi.SQLGenerator {
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return &SQLGenerator{
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Dialect: od,
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Metadata: od.dc.GetMetadata(),
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}
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}
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func (od *OracleDialect) genColumnBasicSql(column dbi.Column) string {
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colName := od.Quoter().Quote(column.ColumnName)
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if column.AutoIncrement {
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// 如果是自增，不需要设置默认值和空值，自增列数据类型必须是number
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return fmt.Sprintf(" %s NUMBER generated by default as IDENTITY", colName)
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}
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nullAble := ""
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if !column.Nullable {
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nullAble = " NOT NULL"
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}
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defVal := ""
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if column.ColumnDefault != "" {
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defVal = fmt.Sprintf(" DEFAULT %v", column.ColumnDefault)
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}
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columnSql := fmt.Sprintf(" %s %s%s%s", colName, column.GetColumnType(), defVal, nullAble)
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return columnSql
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}
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