Question

我们使用Oracle hetrogeneous服务创建了从Oracle数据库到MS sql server数据库的数据库链接 Oracle DB中有一个表A，SQL Server DB中有一个表B.表结构不同。我正在从Oracle dB中选择一些行，并使用Insert语句通过Database链接推送到mssqlserver DB。

此查询的性能很慢。我检查了Oracle日志。 Saying HS代理等待事件意味着等待SQL服务器完成插入和响应。

请您在SQL服务器端建议性能改进方法。对于1000个记录，它需要24秒。我们的目标是在3-5分钟内推动100000记录。我每1000次成功插入就会做一次提交。

用于插入的查询块粘贴在下面。

declare
v_id number:=0;
v_count number:=0;
cursor test_cur is
  select  Post_txn_balance,
      Toll_revenue_type,
      Extern_file_id,
      Card_issuer_id,
      Card_no,
      Tx_seq_number,
      Recv_extn_loc_id,
      Device_no,
      Revenue_date,
      TO_CHAR(Posted_date,'YYYY-MM-DD')Posted_date,
      Purse_ind,
      Recv_extn_sp_id,
      Lane_tx_type,
      Lane_id, 
      Lane_type, 
      Full_fare_amount,
      to_char(Tx_timestamp,'YYYY-MM-DD') Tx_timestamp
  from t_table_a
     where rownum<=10000;

test_cur_data test_cur%rowtype;

begin
      dbms_output.put_line('Going to insert 10000 records ');
      open test_cur;
    loop
     fetch test_cur into test_cur_data;
      exit when test_cur%notfound;
    v_id:=v_id+1;
        v_count:=v_count+1;
    INSERT INTO "t_table_b"@sqldb1(
          "after_card_bal",
          "app_sector",
          "batch_number",
          "card_issuer_id",
          "card_number",
          "card_status",
          "card_txn_number",
          "data_push_source",
          "debit_credit_indicator",
          "entry_loc_id",
          "entry_loc_name",
          "exit_loc_id",
          "exit_loc_name",
          "expiry_date",
          "id_number",
          "id_type",
          "mfg_number",
          "operational_date",
          "posted_date",
          "print_sp",
          "lms_process_date",
          "process_status",
          "purse_flag",
          "sp_id",
          "t_type",
          "terminal_id",
          "terminal_type",
          "txn_amount",
          "txn_date_time",
          "txn_source",
          "txn_unique_id",
          "ur_flag",
          "vector_acct_number"
          ) 
          values
          (
           test_cur_data.Post_txn_balance,
           test_cur_data.Toll_revenue_type,
           test_cur_data.Extern_file_id,
           test_cur_data.Card_issuer_id,
           test_cur_data.Card_no,
           'ACTIVE',
           test_cur_data.Tx_seq_number,
           'C',
           'D',
           '503',
           'MALYASY',
           test_cur_data.Recv_extn_loc_id,
           'MALYASY',
           '01-mar-2016',
           'ABCD123',
           'DFED12',
           test_cur_data.Device_no,
           test_cur_data.Revenue_date,
           test_cur_data.Posted_date,
           '-04',
           '01-mar-2016',
           'P',
          test_cur_data.Purse_ind,
          test_cur_data.Recv_extn_sp_id, 
          test_cur_data.Lane_tx_type, 
            test_cur_data.Lane_id, 
          test_cur_data.Lane_type, 
                    test_cur_data.Full_fare_amount,
                    test_cur_data.Tx_timestamp,
          'T',
          v_id,
          'P',
          '123456'
            );
        IF v_count=1000 then
         commit;
         v_count:=0;
        end if;
      end loop;
      commit;
    v_id:=0;
    v_count:=0;
  EXCEPTION
  WHEN OTHERS THEN
    dbms_output.put_line('Error while pushing data'||sqlerrm);
    ROLLBACK;
end;
/

Answer 1

如果您希望数据库具有高性能（有或没有数据库链接），您应该逐行停止更新或插入，而是使用批量操作，即一次写入大量数据的SQL语句。

所以忘记所有PL / SQL的东西，然后运行这个单一的INSERT语句：

INSERT INTO "t_table_b"@sqldb1(
    "after_card_bal",
    "app_sector",
    "batch_number",
    "card_issuer_id",
    "card_number",
    "card_status",
    "card_txn_number",
    "data_push_source",
    "debit_credit_indicator",
    "entry_loc_id",
    "entry_loc_name",
    "exit_loc_id",
    "exit_loc_name",
    "expiry_date",
    "id_number",
    "id_type",
    "mfg_number",
    "operational_date",
    "posted_date",
    "print_sp",
    "lms_process_date",
    "process_status",
    "purse_flag",
    "sp_id",
    "t_type",
    "terminal_id",
    "terminal_type",
    "txn_amount",
    "txn_date_time",
    "txn_source",
    "txn_unique_id",
    "ur_flag",
    "vector_acct_number"
    )
SELECT
    Post_txn_balance,
    Toll_revenue_type,
    Extern_file_id,
    Card_issuer_id,
    Card_no,
    'ACTIVE',
    Tx_seq_number,
    'C',
    'D',
    '503',
    'MALYASY',
    Recv_extn_loc_id,
    'MALYASY',
    '01-mar-2016',
    'ABCD123',
    'DFED12',
    Device_no,
    Revenue_date,
    TO_CHAR(Posted_date,'YYYY-MM-DD'),
    '-04',
    '01-mar-2016',
    'P',
    Purse_ind,
    Recv_extn_sp_id, 
    Lane_tx_type, 
    Lane_id, 
    Lane_type, 
    Full_fare_amount,
    to_char(Tx_timestamp,'YYYY-MM-DD'),
    'T',
    v_id,
    'P',
    '123456'
from t_table_a;

更短，更简单，更快。

通过数据库链接

1 个答案: