I have a table called borrowlist. When I try to drop a column I get an error that says :
Cannot find the object "borrowlist"
Because it does not exist or you do not have permissions."
Query : USE Test
alter table borrowlist DROP column MEMBERFULLNAME
Related
I'm planning to truncate the hive external table which has one partition. So, I have used the following command to truncate the table :
hive> truncate table abc;
But, it is throwing me an error stating : Cannot truncate non-managed table abc.
Can anyone please suggest me out regarding the same ...
Make your table MANAGED first:
ALTER TABLE abc SET TBLPROPERTIES('EXTERNAL'='FALSE');
Then truncate:
truncate table abc;
And finally you can make it external again:
ALTER TABLE abc SET TBLPROPERTIES('EXTERNAL'='TRUE');
By default, TRUNCATE TABLE is supported only on managed tables. Attempting to truncate an external table results in the following error:
Error: org.apache.spark.sql.AnalysisException: Operation not allowed: TRUNCATE TABLE on external tables
Action Required
Change applications. Do not attempt to run TRUNCATE TABLE on an external table.
Alternatively, change applications to alter a table property to set external.table.purge to true to allow truncation of an external table:
ALTER TABLE mytable SET TBLPROPERTIES ('external.table.purge'='true');
There is an even better solution to this, which is basically a one liner.
insert overwrite table table_xyz select * from table_xyz where 1=2;
This code will delete all the files and create a blank file in the external folder location with absolute zero records.
Look at https://issues.apache.org/jira/browse/HIVE-4367 : use
truncate table my_ext_table force;
I have an Oracle database with a table as follows:
create table Table1
(Column1 number(5,0),
Column2 special_type);
Now, due to some data errors, the support team decided the fix would be to drop and recreate the Type.
I now have a table as follows:
Table1
Column1 number(5,0),
Column2 null
The problem is, I cannot drop the table, I get a "Table has errors" message. I cannot alter the table, I get a "Table has errors" message. I have tried to manipulate the DDL in Oracle SQL Developer, guess what I get? A "Table has errors" message.
Can anyone point me in the right direction?
It seems support team have dropped the type forcefully. In normal scenario, you cannot drop a type if it has any dependent table.
See demo:
SQL> CREATE OR REPLACE TYPE NUU AS TABLE OF NUMBER;
/
Type created.
SQL> CREATE TABLE TBLLL(NUM NUU)
NESTED TABLE NUM STORE AS VVVVV ;
/
Table created.
Now when i try to do a simple drop type, i get the below error:
SQL> drop type nuu;
drop type nuu
*
ERROR at line 1:
ORA-02303: cannot drop or replace a type with type or table dependents
So i drop it forcefully:
SQL> drop type nuu force;
Type dropped.
And when i try to make a select i get the error:
SQL> select * from tblll;
select * from tblll
*
ERROR at line 1:
ORA-04063: table "USER.TBLLL" has errors
So in order to Alter the table you first need to create the type back. Once the type is created back, your table definition becomes correct and then you can Alter your table.
Other solution is to drop the table and recreate it which you already mentioned is not working.
You can try the following -
re-create the type
create another table with same table structure
insert the data into the second table
use the second table now.
You may want to not recreate the type since it caused issues earlier. Find an alternative. It might solve your issue.
I executed this SQL statement in Postgres
alter table user modify column 'distinguishedName1' text;
and
alter table user modify column distinguishedName1 text;
user is the table name
distinguishedName1 is the column name with integer data type.
I wanted to modify the data type to boolean or text or varchar(256) etc based on user's input. But when I run the query I get the error
ERROR: syntax error at or near "modify"
Not sure what is the problem. Help required on right query.
POSTGRES syntax for altering column type :
ALTER TABLE user ALTER COLUMN distinguishedName1 TYPE text;
Try this:
ALTER TABLE "user" ALTER COLUMN distinguishedName1 TYPE text USING code::text;
or
ALTER TABLE "user" ALTER COLUMN distinguishedName1 TYPE text
Also do note that the USING is optional. See the manual here:
The optional USING clause specifies how to compute the new column
value from the old; if omitted, the default conversion is the same as
an assignment cast from old data type to new. A USING clause must be
provided if there is no implicit or assignment cast from old to new
type.
On a side note try to avoid naming your tables as reserved keywords.
alter table user Alter column distinguishedName1 text;
Syntax mistake , for sql server you have to use alter to modify the column of table
Hi How can i remove temp table after creating it
because i get this error There is already an object named '#tmp_statement' in the database.
SELECT * FROM #tmp_statement
DROP TABLE #tmp_statement
You are getting error on creating it, not when dropping it. Try putting this before creating table:
IF object_id('tempdb..#tmp_statement') IS NOT NULL
DROP TABLE #tmp_statement
Or just put it before any other statements you have.
Below is the SQL statement for Deleting the global temp table and creating it again.
if object_ID('tempdb..##TempTable123') is not null
begin drop table tempdb..##TempTable123 end
GO
Select * into ##TempTable123 from ##TempTable1
After executing the Select statement, I am getting the following Error
"The reference to temp table name '##TempTable123' is ambiguous and cannot be resolved. Use either '##TempTable123' or '##TempTable123'."
Try to add tempdb.. to the select:
Select * into tempdb..##TempTable123 from tempdb..##TempTable1