oracel 学习之：sqluldr2使用

sqluldr2

简单介绍：
简介：
Sqluldr2：专业用于大数据量导出工具之一，效率比普通导出快70%。 ( Sqlldr：专业用于导入的工具之一，请注意两个工具的区别。),在使用时,最好用磁盘写入速度快，网络好，网速快的做。

内部实现：

[sql] view plaincopyprint?

#include <stdio.h>

#include "sqluldr2.h"

void main()

{

void *h = NULL;

SQLULDR2HandleAlloc(&h);

if(h != NULL)

{

SQLULDR2HandleSetAttr(h, "USER=SYS");

SQLULDR2HandleSetAttr(h, "QUERY=SELECT * FROM TAB");

SQLULDR2HandleExecute(h);

SQLULDR2HandleFree(h);

}

}

#include <stdio.h>
#include "sqluldr2.h"

void main()
{
void *h = NULL;
SQLULDR2HandleAlloc(&h);
if(h != NULL)
{
SQLULDR2HandleSetAttr(h, "USER=SYS");
SQLULDR2HandleSetAttr(h, "QUERY=SELECT * FROM TAB");
SQLULDR2HandleExecute(h);
SQLULDR2HandleFree(h);
}
}

工具列表:
针对不同平台用不同的导出工具：
Windows: sqluldr2.exe
Linux(32位)： sqluldr2_linux32_10204.bin
Linux(64位): sqluldr2_linux64_10204.bin

使用说明 （Windows平台）：
使用sqluldr2的步骤：
1.打开运行àcmd进入到sqluldr2.exe的当前目录
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[align=left]2.参数介绍[/align]
[align=left]User=用户/密码@tns[/align]
[align=left]Query=”查询语句”[/align]
[align=left]File= 导出的路径[/align]
[align=left]Head= 输出信息时，yes表示要表头，no表示不要表头[/align]
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[align=left]注意：想查看更多参数，请输入 sqluldr2 help=yes[/align]
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[sql] view plaincopyprint?

C:\Users\meng\Desktop\sqluldr2>sqluldr2.exe help=yes

SQL*UnLoader: Fast Oracle Text Unloader (GZIP, Parallel), Release 4.0.1

(@) Copyright Lou Fangxin (AnySQL.net) 2004 - 2010, all rights reserved.

License: Free for non-commercial useage, else 100 USD per server.

Usage: SQLULDR2 keyword=value [,keyword=value,...]

Valid Keywords:

user = username/password@tnsname

sql = SQL file name

query = select statement

field = separator string between fields

record = separator string between records

rows = print progress for every given rows (default, 1000000)

file = output file name(default: uldrdata.txt)

log = log file name, prefix with + to append mode

fast = auto tuning the session level parameters(YES)

text = output type (MYSQL, CSV, MYSQLINS, ORACLEINS, FORM, SEARCH).

charset = character set name of the target database.

ncharset= national character set name of the target database.

parfile = read command option from parameter file

read = set DB_FILE_MULTIBLOCK_READ_COUNT at session level

sort = set SORT_AREA_SIZE at session level (UNIT:MB)

hash = set HASH_AREA_SIZE at session level (UNIT:MB)

array = array fetch size

head = print row header(Yes|No)

batch = save to new file for every rows batch (Yes/No)

size = maximum output file piece size (UNIB:MB)

serial = set _serial_direct_read to TRUE at session level

trace = set event 10046 to given level at session level

table = table name in the sqlldr control file

control = sqlldr control file and path.

mode = sqlldr option, INSERT or APPEND or REPLACE or TRUNCATE

buffer = sqlldr READSIZE and BINDSIZE, default 16 (MB)

long = maximum long field size

width = customized max column width (w1:w2:...)

quote = optional quote string

data = disable real data unload (NO, OFF)

alter = alter session SQLs to be execute before unload

safe = use large buffer to avoid ORA-24345 error (Yes|No)

crypt = encrypted user information only (Yes|No)

sedf/t = enable character translation function

null = replace null with given value

escape = escape character for special characters

escf/t = escape from/to characters list

format = MYSQL: MySQL Insert SQLs, SQL: Insert SQLs.

exec = the command to execute the SQLs.

prehead = column name prefix for head line.

rowpre = row prefix string for each line.

rowsuf = row sufix string for each line.

colsep = separator string between column name and value.

presql = SQL or scripts to be executed before data unload.

postsql = SQL or scripts to be executed after data unload.

lob = extract lob values to single file (FILE).

lobdir = subdirectory count to store lob files .

split = table name for automatically parallelization.

degree = parallelize data copy degree (2-128).

hint = MySQL SQL hint for the Insert, for example IGNORE.

unique = Unique Column List for the MySQL target table.

update = Enable MySQL ON DUPLICATE SQL statement(YES/NO).

for field and record, you can use '0x' to specify hex character code,

\r=0x0d \n=0x0a |=0x7c ,=0x2c, \t=0x09, :=0x3a, #=0x23, "=0x22 '=0x27

C:\Users\meng\Desktop\sqluldr2>

C:\Users\meng\Desktop\sqluldr2>sqluldr2.exe help=yes
SQL*UnLoader: Fast Oracle Text Unloader (GZIP, Parallel), Release 4.0.1
(@) Copyright Lou Fangxin (AnySQL.net) 2004 - 2010, all rights reserved.
License: Free for non-commercial useage, else 100 USD per server.
Usage: SQLULDR2 keyword=value [,keyword=value,...]
Valid Keywords:
user    = username/password@tnsname
sql     = SQL file name
query   = select statement
field   = separator string between fields
record  = separator string between records
rows    = print progress for every given rows (default, 1000000)
file    = output file name(default: uldrdata.txt)
log     = log file name, prefix with + to append mode
fast    = auto tuning the session level parameters(YES)
text    = output type (MYSQL, CSV, MYSQLINS, ORACLEINS, FORM, SEARCH).
charset = character set name of the target database.
ncharset= national character set name of the target database.
parfile = read command option from parameter file
read    = set DB_FILE_MULTIBLOCK_READ_COUNT at session level
sort    = set SORT_AREA_SIZE at session level (UNIT:MB)
hash    = set HASH_AREA_SIZE at session level (UNIT:MB)
array   = array fetch size
head    = print row header(Yes|No)
batch   = save to new file for every rows batch (Yes/No)
size    = maximum output file piece size (UNIB:MB)
serial  = set _serial_direct_read to TRUE at session level
trace   = set event 10046 to given level at session level
table   = table name in the sqlldr control file
control = sqlldr control file and path.
mode    = sqlldr option, INSERT or APPEND or REPLACE or TRUNCATE
buffer  = sqlldr READSIZE and BINDSIZE, default 16 (MB)
long    = maximum long field size
width   = customized max column width (w1:w2:...)
quote   = optional quote string
data    = disable real data unload (NO, OFF)
alter   = alter session SQLs to be execute before unload
safe    = use large buffer to avoid ORA-24345 error (Yes|No)
crypt   = encrypted user information only (Yes|No)
sedf/t  = enable character translation function
null    = replace null with given value
escape  = escape character for special characters
escf/t  = escape from/to characters list
format  = MYSQL: MySQL Insert SQLs, SQL: Insert SQLs.
exec    = the command to execute the SQLs.
prehead = column name prefix for head line.
rowpre  = row prefix string for each line.
rowsuf  = row sufix string for each line.
colsep  = separator string between column name and value.
presql  = SQL or scripts to be executed before data unload.
postsql = SQL or scripts to be executed after data unload.
lob     = extract lob values to single file (FILE).
lobdir  = subdirectory count to store lob files .
split   = table name for automatically parallelization.
degree  = parallelize data copy degree (2-128).
hint    = MySQL SQL hint for the Insert, for example IGNORE.
unique  = Unique Column List for the MySQL target table.
update  = Enable MySQL ON DUPLICATE SQL statement(YES/NO).
for field and record, you can use '0x' to specify hex character code,
\r=0x0d \n=0x0a |=0x7c ,=0x2c, \t=0x09, :=0x3a, #=0x23, "=0x22 '=0x27
C:\Users\meng\Desktop\sqluldr2>

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[align=left]代码例子1：[/align]
[align=left]sqluldr2.exe USER=用户/密码@tnsQUERY="select /*+ parallel(8) */ *from cs_XXX dt,cfg_XXX devdim105 wheredt.starttime>=to_date('2012-06-27 00:00:00','yyyy-mm-dd hh24:mi:ss') and dt.starttime<=to_date('2012-06-2700:01:59','yyyy-mm-dd hh24:mi:ss') AND dt.msc= devdim105.mapvalue(+) ANDdevdim105.deviceid=15 " head=yes FILE=F:\cs_XXX_test.csv[/align]
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[align=left]代码例子2(这种方式用于导出的查询sql很长，那么就把sql写在123.sql文件里 )：[/align]
[align=left]sqluldr2.exe USER=用户/密码@tns sql=123.sqlhead=yes FILE=F:\cs_XXX_test.csv[/align]
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[align=left]3.在cmd里，直接把步骤2的代码例子1 ，贴进去执行。[/align]
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[align=left]注：如果执行报报错，就有可能是环境变量path的问题，还有就是plsql需要的oci.dll文件等多个dll文件，请放在sqluldr2的目录下。[/align]
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[align=left]4.查看结果F:\cs_XXX_test.csv[/align]
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[align=left]5.打开csv里面的内容，就可以用sqlldr进行 入库。[/align]
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[align=left]转自：http://blog.csdn.net/shushugood/article/details/7725984[/align]