Обсуждение: How can I insert NULL into column with the type of timestamp?
H i ,
I want to tansfer a database from sqlserver2005 to postgresql8.2.5.I
use bcp to export a table named admin in sqlserver to a text file:
--table T_admin
id name key regDate
isLock realName
1 rison 998877 2007-08-27 10:24:57 False admin
2 lijun 778899 NULL False NULL
3 guanliyuan 111111 2007-11-05 10:30:08 False myAdmin
--admin.txt
id name key regDate
isLock realname
1 ris 998877 2007-08-27 10:24:57.000 0 admin
2 lij 778899 0
3 guanliyuan 111111 2007-11-05 10:30:08.813 0 myAdmin
I created a table in postgresql,and I use "copy" to import datas
create table T_Admin(
adminID serial not null primary key,
name varchar(30) null,
key varchar(30) null,
regDate timestamp null,
isLock bool null,
realName varchar(30) null
)
copy admin from "/home/postgres/data/admin.txt"
Then error occured:
error:invalid input syntax for type timestamp:""
context:copy T_Admin ,line 2,column regDate:""
It seemed that the column REGDATE cannot accept a NULL.I tested it use:
insert into T_Admin(name,key,regDate,isLock,realName)
values('aaa','aaa','','1','aaa');
The same error occured.
So it means that the column with type timestamp cannot accept a NULL
.Is there any way I can tansfer this table into postgre?How can i deal
with NULL in this case?
Thank you!
On Tue, Dec 11, 2007 at 10:29:04AM +0800, bookman bookman wrote: > So it means that the column with type timestamp cannot accept a NULL > .Is there any way I can tansfer this table into postgre?How can i deal > with NULL in this case? NULL values are encoded as an unquoted \N by default in PG. You've got a few ways of fixing things then. Tell MS-SQL to do the same, write a sed script to do the translation, or use the "NULL AS 'NULL'" option in the COPY command. Sam
bookman bookman escribió:
> Then error occured:
> error:invalid input syntax for type timestamp:""
> context:copy T_Admin ,line 2,column regDate:""
> It seemed that the column REGDATE cannot accept a NULL.I tested it use:
> insert into T_Admin(name,key,regDate,isLock,realName)
> values('aaa','aaa','','1','aaa');
> The same error occured.
>
> So it means that the column with type timestamp cannot accept a NULL
> .Is there any way I can tansfer this table into postgre?How can i deal
> with NULL in this case?
No, it doesn't mean that. It means that you are trying to insert an
empty string. Try this:
insert into T_Admin(name,key,regDate,isLock,realName)
values('aaa','aaa',NULL,'1','aaa');
Similarly, the NULL timestamp column in the file you give to COPY should
not contain empty quotes.
--
Alvaro Herrera http://www.advogato.org/person/alvherre
"Crear es tan difícil como ser libre" (Elsa Triolet)
Hello
use simply NULL
postgres=# create table bb(a timestamp, b integer);
CREATE TABLE
postgres=# insert into bb values(null, null);
INSERT 0 1
postgres=# insert into bb values(null, 10);
INSERT 0 1
postgres=# insert into bb values(current_timestamp, 10);
INSERT 0 1
postgres=# copy bb to stdout;
\N \N
\N 10
2007-12-12 16:48:28.122776 10
or
postgres=# copy bb to stdout with null as 'null';
null null
null 10
2007-12-12 16:48:28.122776 10
Regards
Pavel Stehule
On 11/12/2007, bookman bookman <bookmanb@gmail.com> wrote:
> H i ,
>
> I want to tansfer a database from sqlserver2005 to postgresql8.2.5.I
> use bcp to export a table named admin in sqlserver to a text file:
>
> --table T_admin
> id name key regDate
> isLock realName
> 1 rison 998877 2007-08-27 10:24:57 False admin
> 2 lijun 778899 NULL False NULL
> 3 guanliyuan 111111 2007-11-05 10:30:08 False myAdmin
>
> --admin.txt
> id name key regDate
> isLock realname
> 1 ris 998877 2007-08-27 10:24:57.000 0 admin
> 2 lij 778899 0
> 3 guanliyuan 111111 2007-11-05 10:30:08.813 0 myAdmin
>
> I created a table in postgresql,and I use "copy" to import datas
>
> create table T_Admin(
> adminID serial not null primary key,
> name varchar(30) null,
> key varchar(30) null,
> regDate timestamp null,
> isLock bool null,
> realName varchar(30) null
> )
>
> copy admin from "/home/postgres/data/admin.txt"
>
> Then error occured:
> error:invalid input syntax for type timestamp:""
> context:copy T_Admin ,line 2,column regDate:""
> It seemed that the column REGDATE cannot accept a NULL.I tested it use:
> insert into T_Admin(name,key,regDate,isLock,realName)
> values('aaa','aaa','','1','aaa');
> The same error occured.
>
> So it means that the column with type timestamp cannot accept a NULL
> .Is there any way I can tansfer this table into postgre?How can i deal
> with NULL in this case?
> Thank you!
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: Have you checked our extensive FAQ?
>
> http://www.postgresql.org/docs/faq
>
Actually what you are doing below is trying to stuff '' in a timestamp
field.
Keep in mind '' and NULL are not the same. '' is invalid for timestamp
where as NULL is fine. Your example should be
insert into T_Admin(name,key,regDate,isLock,realName)
values('aaa','aaa',NULL,'1','aaa');
I think the bcp is trying to insert 'NULL' instead of NULL.
According to the docs - looks like you can tell copy that
http://www.postgresql.org/docs/techdocs.15
So my guess is you should do
copy t_admin from "/home/postgres/data/admin.txt" USING DELIMITERS '\t'
WITH NULL As 'NULL'
Hope that helps,
Regina
-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of bookman bookman
Sent: Monday, December 10, 2007 9:29 PM
To: pgsql-general@postgresql.org
Subject: [GENERAL] How can I insert NULL into column with the type of
timestamp?
H i ,
I want to tansfer a database from sqlserver2005 to postgresql8.2.5.I
use bcp to export a table named admin in sqlserver to a text file:
--table T_admin
id name key regDate
isLock realName
1 rison 998877 2007-08-27 10:24:57 False
admin
2 lijun 778899 NULL
False NULL
3 guanliyuan 111111 2007-11-05 10:30:08 False
myAdmin
--admin.txt
id name key regDate
isLock realname
1 ris 998877 2007-08-27 10:24:57.000 0 admin
2 lij 778899 0
3 guanliyuan 111111 2007-11-05 10:30:08.813 0
myAdmin
I created a table in postgresql,and I use "copy" to import datas
create table T_Admin(
adminID serial not null primary key,
name varchar(30) null,
key varchar(30) null,
regDate timestamp null,
isLock bool null,
realName varchar(30) null
)
copy admin from "/home/postgres/data/admin.txt"
Then error occured:
error:invalid input syntax for type timestamp:""
context:copy T_Admin ,line 2,column regDate:""
It seemed that the column REGDATE cannot accept a NULL.I tested it use:
insert into T_Admin(name,key,regDate,isLock,realName)
values('aaa','aaa','','1','aaa');
The same error occured.
So it means that the column with type timestamp cannot accept a NULL
..Is there any way I can tansfer this table into postgre?How can i deal
with NULL in this case?
Thank you!
---------------------------(end of broadcast)---------------------------
TIP 3: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faq
-----------------------------------------
The substance of this message, including any attachments, may be
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pursuant to Massachusetts law. It is intended
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Thank you!
2007/12/12, Obe, Regina <robe.dnd@cityofboston.gov>:
> Actually what you are doing below is trying to stuff '' in a timestamp
> field.
>
> Keep in mind '' and NULL are not the same. '' is invalid for timestamp
> where as NULL is fine. Your example should be
> insert into T_Admin(name,key,regDate,isLock,realName)
> values('aaa','aaa',NULL,'1','aaa');
>
> I think the bcp is trying to insert 'NULL' instead of NULL.
>
> According to the docs - looks like you can tell copy that
> http://www.postgresql.org/docs/techdocs.15
>
> So my guess is you should do
> copy t_admin from "/home/postgres/data/admin.txt" USING DELIMITERS '\t'
> WITH NULL As 'NULL'
>
> Hope that helps,
> Regina
>
>
>
> -----Original Message-----
> From: pgsql-general-owner@postgresql.org
> [mailto:pgsql-general-owner@postgresql.org] On Behalf Of bookman bookman
> Sent: Monday, December 10, 2007 9:29 PM
> To: pgsql-general@postgresql.org
> Subject: [GENERAL] How can I insert NULL into column with the type of
> timestamp?
>
> H i ,
>
> I want to tansfer a database from sqlserver2005 to postgresql8.2.5.I
> use bcp to export a table named admin in sqlserver to a text file:
>
> --table T_admin
> id name key regDate
> isLock realName
> 1 rison 998877 2007-08-27 10:24:57 False
> admin
> 2 lijun 778899 NULL
> False NULL
> 3 guanliyuan 111111 2007-11-05 10:30:08 False
> myAdmin
>
> --admin.txt
> id name key regDate
> isLock realname
> 1 ris 998877 2007-08-27 10:24:57.000 0 admin
> 2 lij 778899 0
> 3 guanliyuan 111111 2007-11-05 10:30:08.813 0
> myAdmin
>
> I created a table in postgresql,and I use "copy" to import datas
>
> create table T_Admin(
> adminID serial not null primary key,
> name varchar(30) null,
> key varchar(30) null,
> regDate timestamp null,
> isLock bool null,
> realName varchar(30) null
> )
>
> copy admin from "/home/postgres/data/admin.txt"
>
> Then error occured:
> error:invalid input syntax for type timestamp:""
> context:copy T_Admin ,line 2,column regDate:""
> It seemed that the column REGDATE cannot accept a NULL.I tested it use:
> insert into T_Admin(name,key,regDate,isLock,realName)
> values('aaa','aaa','','1','aaa');
> The same error occured.
>
> So it means that the column with type timestamp cannot accept a NULL
> ..Is there any way I can tansfer this table into postgre?How can i deal
> with NULL in this case?
> Thank you!
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: Have you checked our extensive FAQ?
>
> http://www.postgresql.org/docs/faq
> -----------------------------------------
> The substance of this message, including any attachments, may be
> confidential, legally privileged and/or exempt from disclosure
> pursuant to Massachusetts law. It is intended
> solely for the addressee. If you received this in error, please
> contact the sender and delete the material from any computer.
>
>