How to populate a timestamp field with current timestamp using Oracle Sql Loader

问题

I'm reading a pipe delimited file with SQL Loader and want to populate a LAST_UPDATED field in the table I am populating. My Control File looks like this:

LOAD DATA
INFILE SampleFile.dat
REPLACE
INTO TABLE contact
FIELDS TERMINATED BY '|'
OPTIONALLY ENCLOSED BY '"'
(
ID, 
FIRST_NAME,
LAST_NAME,
EMAIL,
DEPARTMENT_ID,
LAST_UPDATED SYSTIMESTAMP
)

For the LAST_UPDATED field I've tried SYSTIMESTAMP and CURRENT_TIMESTAMP and neither work. SYSDATE however works fine but doesn't give me the time of day.

I am brand new to SQL Loader so I really know very little about what it is or isn't capable of. Thanks.

回答1:

Have you tried the following:

CURRENT_TIMESTAMP [ (precision) ]

select current_timestamp(3) from dual;

CURRENT_TIMESTAMP(3)
-----------------------------
10-JUL-04 19.11.12.686 +01:00

To do this in SQLLDR, you will need to use EXPRESSION in the CTL file so that SQLLDR knows to treat the call as SQL.

Replace:

LAST_UPDATED SYSTIMESTAMP

with:

LAST_UPDATED EXPRESSION "current_timestamp(3)"

回答2:

I accepted RC's answer because ultimately he answered what I was asking but my unfamiliarity with some of Oracle's tools led me to make this more difficult than it needed to be.

I was trying to get SQL*Loader to record a timestamp instead of just a date. When I used SYSDATE, and then did a select on the table it was only listing the the date (05-AUG-09).

Then, I tried RC's method (in the comments) and it worked. However, still, when I did a select on the table I got the same date format. Then it occurred to me it could just be truncating the remainder for display purposes. So then I did a:

select TO_CHAR(LAST_UPDATED,'MMDDYYYY:HH24:MI:SS') from contact;

And it then displayed everything. Then I went back to the control file and changed it back to SYSDATE and ran the same query and sure enough, the HH:MI:SS was there and accurate.

This is all being done in SqlDeveloper. I don't know why it defaults to this behavior. Also what threw me off are the following two statements in sqldeveloper.

SELECT CURRENT_TIMESTAMP FROM DUAL; //returns a full date and time 

SELECT SYSDATE FROM DUAL; // returns only a date

回答3:

In Sql Developer run: ALTER SESSION SET NLS_DATE_FORMAT='YYYY-MM-DD HH24:MI:SS'

and then check it with SELECT SYSDATE FROM DUAL

来源：https://stackoverflow.com/questions/1233254/how-to-populate-a-timestamp-field-with-current-timestamp-using-oracle-sql-loader

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Oracle

sql-loader