通过 dblink (dg4msql) 将数据从 Oracle 18 插入 SQL Server 2016

Question

我们在通过 dblink (dg4msql) 从 Oracle 18 向 SQL Server 2016 插入数据时遇到问题。

环境：

• ORACLE 版本 18.4.0.0.0 + Oracle Database Gateway for MS SQL Server 18.0.0.0.0 在不同的主机上
• SQL Server 2016 (v13.0.4001.0)

对于我使用的映射数据类型： https://docs.microsoft.com/en-us/sql/relational-databases/replication/non-sql/data-type-mapping-for-oracle-publishers?view=sql-server-2016

在ORACLE GW中设置参数：

HS_LANGUAGE=RUSSIAN_RUSSIA.CL8MSWIN1251
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
HS_FDS_CONNECT_INFO=X.X.X.X:1433//BUFFER1
HS_NLS_DATE_FORMAT="YYYY-MM-DD HH24:MI:SS"
HS_NLS_NUMERIC_CHARACTER=".,"

Oracle 客户端（sqlplus）：

NLS_LANG=AMERICAN_AMERICA.CL8MSWIN1251
NLS_DATE_FORMAT="YYYY-MM-DD HH24:MI:SS"
NLS_NUMERIC_CHARACTERS=".,"

在 Oracle 中，我们有全局临时表

desc TBL_KPI_2G_TEMP

Name                                      Null?    Type
----------------------------------------- -------- ----------------------------
d                                                  DATE
reg                                                VARCHAR2(500)
LAC                                                NUMBER
CI                                                 NUMBER
Cell                                               VARCHAR2(500)
traf_sp                                            NUMBER
cssr                                               NUMBER
bcr                                                NUMBER
dcr                                                NUMBER
hr_usage                                           NUMBER
trf_bh                                             NUMBER
trf_bh_30_avg                                      NUMBER
trf_bh_30_max                                      NUMBER
trf_bh_30_perc_92                                  NUMBER
trf_ul_mb                                          NUMBER
trf_dl_mb                                          NUMBER
tbf_sr                                             NUMBER
tbf_dr                                             NUMBER
tbf_br                                             NUMBER
avail                                              NUMBER
ho_sr                                              NUMBER

在 SQL Server 中：

SELECT 
    table_name, column_name, data_type, character_maximum_length, numeric_precision
FROM 
    INFORMATION_SCHEMA.COLUMNS@MS_DBLINK
WHERE 
    TABLE_NAME = 'TBL_KPI_2G'; 

TABLE_NAME    COLUMN_NAME      DATA_TYPE    CHARACTER_MAXIMUM_LENGTH    NUMERIC_PRECISION
TBL_KPI_2G    id                 int                10
TBL_KPI_2G    d                  datetime        
TBL_KPI_2G    reg                varchar            500    
TBL_KPI_2G    LAC                float                                        53
TBL_KPI_2G    CI                 float                                        53
TBL_KPI_2G    Cell               varchar            500    
TBL_KPI_2G    traf_sp            float                                        53
TBL_KPI_2G    cssr               float                                        53
TBL_KPI_2G    bcr                float                                        53
TBL_KPI_2G    dcr                float                                        53
TBL_KPI_2G    hr_usage           float                                        53
TBL_KPI_2G    trf_bh             float                                        53
TBL_KPI_2G    trf_bh_30_avg      float                                        53
TBL_KPI_2G    trf_bh_30_max      float                                        53
TBL_KPI_2G    trf_bh_30_perc_92  float                                        53
TBL_KPI_2G    trf_ul_mb          float                                        53
TBL_KPI_2G    trf_dl_mb          float                                        53
TBL_KPI_2G    tbf_sr             float                                        53
TBL_KPI_2G    tbf_dr             float                                        53
TBL_KPI_2G    tbf_br             float                                        53
TBL_KPI_2G    avail              float                                        53
TBL_KPI_2G    ho_sr              float                                        53
TBL_KPI_2G    d2                 date        
TBL_KPI_2G    d3                 datetime2        
TBL_KPI_2G    beg                varchar            20    
TBL_KPI_2G    ends               varchar            20    
TBL_KPI_2G    mid1               varchar            20    
TBL_KPI_2G    mid2               varchar            20    

第一个问题（列反转）：

insert into TBL_KPI_2G@MS_DBLINK ("beg", "mid1", "mid2", "ends") 
select 
 '1','2','3','4' 
from TBL_KPI_2G_TEMP;  

1 rows created. 

SQL> commit; 

Commit complete. 

SQL> select "beg","mid1","mid2","ends"from TBL_KPI_2G@MS_DBLINK; 

beg 
------------------------------------------------------------ 
mid1 
------------------------------------------------------------ 
mid2 
------------------------------------------------------------ 
ends 
------------------------------------------------------------ 
4
3
2
1

--------第二个问题（无效字符值）-----------

     SQL> insert into TBL_KPI_2G@MS_DBLINK("d","Cell","trf_ul_mb","reg","d3") select'2020-10-15 21:14:09','ZZZZZZZZZZZZZZZZ',5.6,'ffff','2020-10-15 21:14:09' from dual;                
                
1 row created.                
                
SQL> insert into TBL_KPI_2G@MS_DBLINK("d","Cell","trf_ul_mb","reg","d3") select'2020-10-15 21:14:09','ZZZZZZZZZZZZZZZZ',5.6,'ffff','2020-10-15 21:14:09' from dual;                
                
1 row created.                
                
SQL> commit;                
                
Commit complete.                
                
SQL> insert into TBL_KPI_2G@MS_DBLINK("d","Cell","trf_ul_mb","reg","d3") select'2020-10-15 21:14:09','ZZZZZZZZZZZZZZZZ',5.6,'ffff','2020-10-15 21:14:09' from dual;                
insert into TBL_KPI_2G@MS_DBLINK("d","Cell","trf_ul_mb","reg","d3") select'2020-10-15 21:14:09','ZZZZZZZZZZZZZZZZ',5.6,'ffff','2020-10-15 21:14:09' from dual                
                       *                
ERROR at line 1:                
ORA-00600: internal error code, arguments: [qerrdmliFlushRows], [28500],                
[ORA-28500: connection from ORACLE to a non-Oracle system returned this                
message:                
[Oracle][ODBC SQL Server Wire Protocol driver]Invalid character value. Error in                
parameter 4. {22018}                
ORA-02063: preceding 2 lines from MS_DBLINK                
], [], [], [], [], [], [], [], [], [] 


select "d","Cell","trf_ul_mb","reg","d3" from TBL_KPI_2G@MS_DBLINK;


d                              Cell                            trf_ul_mb reg                            d3
------------------------------ ------------------------------ ---------- ------------------------------ ------------------------------
2020-10-15 21:14:09             B    ?H    ??  ???  @?  ########## ZZZZZZZZZZZZZZZZ             2020-10-15 21:14:09
                                  ??U             ?F     @

2020-10-15 21:14:09             B    ?H    ??  ???  @?  ########## ZZZZZZZZZZZZZZZZ             2020-10-15 21:14:09
                                  H?U             ?F     @
        

我不明白会发生什么。

Answer 1

我觉得你不明白

SQL> delete from TBL_KPI_2G@MS_DBLINK;
commit;

1 row deleted.

SQL>
Commit complete.

SQL> SQL> SQL>
SQL>
SQL> select '1' "beg",'2' "mid1" ,'3' "mid2",'4' "ends" from dual;

beg                  mid1                 mid2                 ends
-------------------- -------------------- -------------------- --------------------
1                    2                    3                    4

SQL> insert into TBL_KPI_2G@MS_DBLINK ("beg", "mid1", "mid2", "ends")
  2  select '1' "beg",'2' "mid1" ,'3' "mid2",'4' "ends" from dual;

1 row created.

SQL> commit;

Commit complete.

SQL>  select "beg", "mid1", "mid2", "ends" from  TBL_KPI_2G@MS_DBLINK;

beg                  mid1                 mid2                 ends
-------------------- -------------------- -------------------- --------------------
4                    3                    2                    1

enter image description here

当字段区分大小写时使用双引号 enter image description here

插入一个值可以正常工作，但我需要从表中插入数据并且遇到问题“异构服务数据类型映射错误”

    delete from TBL_KPI_2G@MS_DBLINK;

1 row deleted.

SQL>  insert into TBL_KPI_2G_TEMP ("d", "Cell", "trf_ul_mb", "reg", "d3") values
   ('2020-10-15 21:14:09',
    'ZZZZZZZZZZZZZZZZ',
    5.6,
    'ffff',
    '2020-10-15 21:14:09');   2    3    4    5    6

1 row created.

SQL>  insert into TBL_KPI_2G@MS_DBLINK("d", "Cell", "trf_ul_mb", "reg", "d3") select "d", "Cell", "trf_ul_mb", "reg", "d3" from TBL_KPI_2G_TEMP;
 insert into TBL_KPI_2G@MS_DBLINK("d", "Cell", "trf_ul_mb", "reg", "d3") select "d", "Cell", "trf_ul_mb", "reg", "d3" from TBL_KPI_2G_TEMP
                                                                                                                 *
ERROR at line 1:
ORA-00600: internal error code, arguments: [qerrdmliFlushRows], [28527], [ORA-28527: Heterogeneous Services datatype mapping error
ORA-02063: preceding line from MS_DBLINK
], [], [], [], [], [], [], [], [], []


SQL> insert into TBL_KPI_2G@MS_DBLINK
   ("d", "Cell", "trf_ul_mb", "reg", "d3")
values
   ('2020-10-15 21:14:09',
    'ZZZZZZZZZZZZZZZZ',
    5.6,
    'ffff',
    '2020-10-15 21:14:09');  2    3    4    5    6    7    8

1 row created.

SQL> select "d", "Cell", "trf_ul_mb", "reg", "d3" from TBL_KPI_2G@MS_DBLINK;

d                    Cell                 trf_ul_mb reg                  d3
-------------------- -------------------- --------- -------------------- --------------------
2020-10-15 21:14:09  ZZZZZZZZZZZZZZZZ          5.60 ffff                 2020-10-15 21:14:09

Answer 2

你的第一个问题不是问题。它显示一行输出。该行包含四个非常宽的字段，并折叠在四行屏幕输出上，但它仍然是一行。有一些命令可以将字段格式化为较短的字符串，但表格数据就可以了。

关于您的第二个问题：为什么不使用更标准的方法，例如：

insert into TBL_KPI_2G@MS_DBLINK
   (d, Cell, trf_ul_mb, reg, d3)
values
   ('2020-10-15 21:14:09', 
    'ZZZZZZZZZZZZZZZZ',
    5.6,
    'ffff',
    '2020-10-15 21:14:09');

将查询格式化为更多行有助于理解。

字段名称周围的引号可以避免但也会导致大小写问题。通常，您不需要这些引号。

不需要 FROM DUAL。

---

关于问题 1：您确定插入了 1 行的四个字段吗？看起来您插入了 1 个字段的 4 行。误会的原因是没有使用values(...)。

此外，在 SQL 中，行不是“有序”存储的。您可以在选择查询中明确指定 ORDER BY 以查看您的表格。

试试：

SELECT "beg" FROM TBL_KPI_2G@MS_DBLINK;

这可能会显示 4 条记录。