getCreateTableSQL

private TableInfo getCreateTableSQL(DataBase sourceDB, Connection oraConn,
SqlRecord record) throws Exception {
Statement stmt = oraConn.createStatement();
String sql = "select COLUMN_NAME ,DATA_TYPE,DATA_LENGTH,NULLABLE,DATA_PRECISION,DATA_SCALE from cols"
+ " where table_name='"
+ record.getTableName()
+ "' order by COLUMN_ID";
ResultSet cols = stmt.executeQuery(sql);

TableInfo tableInfo = new TableInfo();
tableInfo.setTablename(record.getTableName());
tableInfo.setDbType("oracle");
List<Column> columns = new ArrayList<Column>();
while (cols.next()) {
Column column = new Column();
column.setColumn_name(cols.getString("COLUMN_NAME"));
String type = cols.getString("DATA_TYPE");
column.setColumn_stype(type);
int lenth = cols.getInt("DATA_LENGTH");
column.setColumn_length(lenth);
String isnull = cols.getString("NULLABLE");
int nullable = 1;
if (isnull.equalsIgnoreCase("N"))
nullable=0;
column.setColumn_nullable(nullable);
column.setColumn_precision(cols.getInt("DATA_PRECISION"));
Integer ct = ColumnTypeMapping.oracleMap.get(type);
if (null == ct) {
System.out.println(type);
column.setColumn_type(0);
} else {
column.setColumn_type(ct);
}
column.setColumn_data_scale(cols.getInt("DATA_SCALE"));
columns.add(column);
}
tableInfo.setColumns(columns);
Primary_Key priKey = sourceDB.getPrimaryKey(record);

tableInfo.setPri_key(priKey);

// String keycols = "";
// add constraint PK_DC_STATUS_DEF primary key (STATUS_TYPE, STATUS_ID)
// String creatKey = "alter table " + priKey.getTableName()
// + " add constraiint " + priKey.getKeyName() + " primary key ("
// + keycols + ")";

String createSql = OracleDataBase.getHQLTableDdlSQL(tableInfo);
tableInfo.setHsqldbCreatTableSQL(createSql);
// tableInfo.setHsqldbCreateKey(creatKey);
stmt.close();
cols.close();
return tableInfo;
}
C# 同步数据从一个数据库postgresql表到另一个数据库sql server的表改成从一个数据库postgresql表到另一个数据库postgresql的表,如何修改下面函数实现这个功能,改完显示这个正确函数,源代码是: /// <summary> /// /// </summary> /// <param name="connectionString"></param> /// <param name="tableName">本地历史表,如“m1_data_log_record_1_2022”</param> /// <param name="keyField">关键比对字段,如“write_date”</param> /// <param name="table">本地历史表数据,格式是DataTable</param> /// <param name="machinename">区别具体内容,如“T113”</param> /// <param name="machine_id_name">字段名称,如字段名“machine_num”</param> /// <returns></returns> public bool SqlBulkCopyUpgrade(string connectionString, string tableName, string keyField, DataTable table, string machinename, string machine_id_name) { connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["sql_dataname"].ToString(); bool isSucc = false; var tmpTableName = "atmp_" + tableName; var msg = ""; try { #region 1.创建临时表 var filedObj = GetCreateTableSql(table, tmpTableName, tableName); DBHelper.ExecuteCommand(filedObj.Sql); if (tmpTableName.Contains("mp1_data_log_record_1_2023")) { var sql = @"CREATE INDEX idx_Price ON " + tmpTableName + " (write_date);"; sql += @"CREATE INDEX idx_Price2 ON " + tmpTableName + " (ID);"; DBHelper.ExecuteCommand(sql); } #endregion #region 2.将this数据使用sqlbulk导入到临时表 //开始数据保存逻辑 using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); SqlTransaction tran = conn.BeginTransaction();//开启事务 //在插入数据的同时检查约束,如果发生错误调用sqlbulkTransaction事务 SqlBulkCopy bulkCopy = new SqlBulkCopy(conn, SqlBulkCopyOptions.CheckConstraints, tran); bulkCopy.DestinationTableName = tmpTableName;//代表要插入数据的表名 foreach (DataColumn dc in table.Columns) //传入上述table { bulkCopy.ColumnMappings.Add(dc.ColumnName, dc.ColumnName);//将table中的列与数据库表这的列一一对应 } try { bulkCopy.WriteToServer(table); tran.Commit(); isSucc = true; } catch (Exception ex) { tran.Rollback(); Program.ReportErr("histoTmp" + ex.Message); } finally { bulkCopy.Close(); conn.Close(); } if (!isSucc) throw new Exception($"histoTmp失败{tmpTableName}"); Program.ReportErr("histoTmp" + tmpTableName + "成功...."); } #endregion #region 3.将临时表数据,批量插入到正式表 string fieldStr = string.Join(",", filedObj.Fields); if(fieldStr.StartsWith("id,")) { fieldStr= fieldStr.Remove(0, 3); } string sqlList="" ; //包含主键设置的话,在正式表里删除重复数据 if (!string.IsNullOrEmpty(keyField)) { var delSql = string.Format(@"delete t1 from atmp_{0} t1 inner join {0} t2 on t2.{1}=t1.{1} and t2.{3}='{2}' ;", tableName, keyField, machinename, machine_id_name); sqlList+=delSql; DBHelper.ExecuteCommand(sqlList); } sqlList = ""; var insertSql = string.Format(@" insert into {0}({1})select {1} from atmp_{0} order by id asc;", tableName, fieldStr); sqlList += insertSql; DBHelper.ExecuteCommand(sqlList); sqlList = ""; sqlList += $"drop table atmp_{tableName};"; DBHelper.ExecuteCommand(sqlList); #endregion } catch (Exception e) { Program.ReportErr(e.Message); } return isSucc; }
最新发布
08-20
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