I tried session.createSQLQuery("ALTER TABLE People MODIFY address VARCHAR(1000);").executeUpdate();
but this throws org.hibernate.exception.SQLGrammarException: could not execute native bulk manipulation query
After a lot of googling, the recommendation is to use HQL instead of SQL query to do bulk updates. Not sure how to use HQL to accomplish this. There seems to be no decent HQL documentation for updating column length in a table.
Thanks so much for the help.
I suggest you to run this native SQL query via session.connection().
See section 16.2.2.1. Rules/limitations for using stored procedures of Chapter 16. Native SQL, it's near your ALTER query.
All the rest depends on your database vendor. Good Luck!
I could not find a way. Looks like a limitation. I added a new field and copied over data from old field at start-up!
Related
New to Entity Framework Core. How do I clear all the rows from a table?
I searched around and found the following solution:
_context.Database.ExecuteSqlCommand("TRUNCATE TABLE[TableName]");
Unfortunately using ExecuteSqlCommand throws a compiler error.
Am I missing a namespace or is there another way to do this?
Thanks, JohnB
ExecuteSqlCommand is Obsolete,you can see the details here.
For the execution of SQL queries using plain strings, use ExecuteSqlRaw instead. For the execution of SQL queries using interpolated string syntax to create parameters, use ExecuteSqlInterpolated instead.
So you can use:
_context.Database.ExecuteSqlRaw("TRUNCATE TABLE[TableName]");
I'm looking for a way to programmatically execute arbitrary SQL commands against my DB.
(Hibernate, JPA, HSQL)
Query.createNativeQuery() doesn't work for things like CREATE TABLE.
Doing LOTS of searching, I thought I could use the Hibernate Session.doWork().
By using the deprecated Configuration.buildSesionFactory() seems to show that doWork won't work.
I get "use lacks privilege or object not found" for all the CREATE TABLE statements.
So, what other technique is there for executing arbitratry SQL statements?
There were some notes on using the underlying JDBC Statement, but I haven't figure out how to get a JDBC Connection object from Hibernate to try that.
Note that the hibernate.hbm2ddl.auto=create setting will NOT work for me, as I have ARRAY[] columns which it chokes on.
I don't think there is any problem executing a create table statement with a Hibernate native query. Just make sure to use Query.executeUpdate(), and not Query.list() or Query.uniqueResult().
If it doesn't work, please tell us what happens when you execute it, and join the full stack trace of the exception and the SQL query you're executing.
"use lacks privilege or object not found" in HSQL may mean anything, for example existence of a table with the same name. Error messages in HSQL are completely misleading. Try listing your tables using DatabaseMetadata - you have probably already created the table.
select orderid from orders where REGEXP_REPLACE(orderid,'/^0+(.)/')
I have searched the documentation and am missing it. If I run this query will it change any real data or just my set returned for output (the "virtual" data)? The word replace scares me. I am using oracle 11g.
Thank you.
Because you are performing a SELECT, you end up getting a read only view of the data, nothing has changed.
So you don't need to worry about running this select statement. The only way to update it would be to follow this up with an UPDATE command.
No, it doesn't. (even though this answer is too short for SO).
I'm using a DB2 database and I'm hoping for a query which will iterate over all stored procedures in a single database and print out the source code of each. No fancy formatting or performance requirements.
The reason for this (in case there's a better way of doing it) is I'm trying to track down usages of a particular table in our stored procs, so I want to be able to do a simple text search through all of them.
Also, I've got access to SQuirreL SQL client if anyone knows of a way via that.
Ah, figured it out. For other's reference:
select ROUTINENAME, TEXT from syscat.routines
where definer not in ('SYSIBM') AND ROUTINESCHEMA='databaseName'
I know this is old, but your answer started me on the right track. We are also using DB2, but don't have syscat.routines visible to us. However we do have SYSIBM.SYSROUTINES and that allows similar by doing
SELECT SCHEMA,
NAME,
TEXT
FROM SYSIBM.SYSROUTINES
WHERE SCHEMA = '<SCHEMA>'
and NAME = '<NAME>'
FOR FETCH ONLY WITH UR;
Can I use DML in from clause in DB2? thank you
The DB2 V9 SQL Reference states that the FROM clause can only contain a table-reference:
.-,---------------.
V |
>>-FROM----table-reference-+-----------------------------------><
The description of "table-reference" is directly below that, so it will tell you exactly what is allowed and what is not allowed. A table-reference can include "Data change table references," one of which is "NEW TABLE." Maybe that's what you're after, but as other people have already said, without knowing what you're trying to do, it's hard to answer the question.
SQL Syntax diagram for table-reference (scroll about 1/4 down the page)
Why would you do that? I don't think I've ever seen that in an SQL statement...