Grant UTL_HTTP permission in PLSQL - plsql

I would like to get HTML content from a certain webpage in my function. I read I can do it with the UTL_HTML package in PLSQL. So I made the following code in the project:
v_webcontent := utl_http.request(v_weblink);
Here the v_webconent and v_weblink are declared earlier. running this in de function gives an PLSQL exception: PLS-00201: identifier 'UTL_HTTP' must be declaredI guess this problem is because the package isn't available (from this link: same error message).
I followed the advice. So I created a new database connection in sql developer as the SYSTEM role (SYS didn't work, it sayd I could only logon using SYSDBA or SYSOPER but both wouldn't take the standard password I created with the database). Then I entered the code in the link above.
GRANT EXECUTE ON SYS.UTL_HTTP TO [database];
The user I created is named 'Database'. It first gave me an error without the [] square brackets. Table or view does not exist so I then put the brackets around it. Now it gives error:
Error starting at line : 1 in command -
GRANT EXECUTE ON SYS.UTL_HTTP TO [database]
Error report -
SQL Error: ORA-00987: missing or invalid username(s)
00987. 00000 - "missing or invalid username(s)"
*Cause:
*Action:
So I have no idea how to fix this. In the link above OP said that he got an other error, so I also checked if I didn't have the same problem. I entered:
SELECT * FROM dba_objects WHERE object_name='UTL_HTTP'
It returned 4 entry's. With owners: SYS, SYS, PUBLIC and APEX_040000.
Can somebody help me? Do I need to logon as SYS and with what passwords?

Since 11g you also have to create an access control list ('ACL') which specifies which users have access to particular domains, it is no longer sufficient to just grant users execute privileges on utl_http!
Something like this should work in 11g(after granting execute privileges on UTL_HTTP to your database user, as specified by the accepted answer) :
SQL> BEGIN
2 DBMS_NETWORK_ACL_ADMIN.CREATE_ACL(acl=>'mikesacl.xml',
3 description=>'access control list example',
4 principal=>'HR',
5 is_grant=>TRUE,
6 privilege=>'connect');
7 commit;
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> begin
2 DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL(
3 acl=>'mikesacl.xml',host=>'*');
4 commit;
5 end;
6 /
PL/SQL procedure successfully completed.
Here is a very helpful link which explains the parameters of the above two functions :
http://www.oracleflash.com/36/Oracle-11g-Access-Control-List-for-External-Network-Services.html
Good luck!

Log on as SYS AS SYSDBA.
Execute grant execute on sys.utl_http to "Database"; Do not use any square brackets!
That should work.
Piece of advice: Do not name your DB user 'Database'.
To reset your SYS password
Run cmd.exe as administrator.
cd to your ${ORACLE_HOME}/database.
Find the PWDsomething.ora file there (where something will be your instance name), copy its name (into clipboard).
Run orapwd file=PWDsomething.ora password=SomePasswordOfMine force=y, where PWDsomething.ora will be replaced with the file name from the step 3 and SomePasswordOfMine must be replaced by whatever password you wish to have.
That might work.

Related

with sqlplus, how do i run an explain plan on a query in a file

generally, i can run a .sql file in windows like so:
SQL> #"longpath/sqlfile.sql"
and sqlplus will spit out the results of the query.
but i'm trying to run something like:
SQL> EXPLAIN PLAN FOR #"longpath/sqlfile.sql";
i'm getting an error
EXPLAIN PLAN FOR #"longpath/sqlfile.sql"
*
ERROR at line 1:
ORA-00905: missing keyword
not sure what keyword im missing...

How to migrate data to new server? (Sequence generator issue)

What is the right way to backup and restore a MariaDB database that has sequence generation enabled (i.e. NOT autoincrement)? (This includes migrating to a new server.)
Is it possible to instruct the sequence generator to pick up indexing table data at a specific ID value? How?
Steps I take to create my issue
I wish to transfer an application to a new server:
Backup data on source server:
mysqldump --skip-opt --no-create-db --no-create-info --hex-blob [database-name] [...list of tables...] > data-backup.sql
On target server, create new empty database (same name)
Build/run JHipster Spring application on target server: java -jar myapp.jar (Running this application recreates/configures a new instance of the database on the target server.)
Restore data:
mysql [database-name] < data-backup.sql
All the above steps produce no errors (so far).
Problem
When I follow these steps, the database is restored (apparently perfectly). I can log in to the application and access all information. BUT when I attempt to create new entities (i.e. save something to the database), I get an ID 'Duplicate entry' error in the server logs:
2022-03-24 12:54:43.775 ERROR 11277 --- [ XNIO-1 task-1] o.h.e.jdbc.batch.internal.BatchingBatch : HHH000315: Exception executing batch [java.sql.BatchUpdateException: (conn=33) Duplicate entry '1001' for key 'PRIMARY'], SQL: insert into product (name, id) values (?, ?)
2022-03-24 12:54:43.776 WARN 11277 --- [ XNIO-1 task-1] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 1062, SQLState: 23000
2022-03-24 12:54:43.776 ERROR 11277 --- [ XNIO-1 task-1] o.h.engine.jdbc.spi.SqlExceptionHelper : (conn=33) Duplicate entry '1001' for key 'PRIMARY'
2022-03-24 12:54:43.779 ERROR 11277 --- [ XNIO-1 task-1] o.z.problem.spring.common.AdviceTraits : Internal Server Error
org.springframework.dao.DataIntegrityViolationException: could not execute batch; SQL [insert into product (name, id) values (?, ?)]; constraint [PRIMARY]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute batch
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:276)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:233)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:566)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:753)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:698)
at com.mycompany.app.web.rest.ProductResource$$EnhancerBySpringCGLIB$$84c14d6d.createProduct(<generated>)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
...
Clearly my backup/restore process is not accounting properly for the sequence generator, which generates ID values that conflict with the existing data.
What I am doing wrong? What is the right process of backing up/restoring such a database?
Environment: JHipster 7.7.0 (Angular, monolithic), MariaDB 10.4, OpenJDK 16.0.2_7, OS Windows 10 Pro and openSUSE 15.2, Firefox 98.0.2 and Chrome 99.0.4844.84.
PS: I previously reported this issue here, aimed at the JHipster community, but got limited response. I think I need a MySQL/MariaDB expert opinion on this.
(Apologies in advance: I'm not a database expert. The technique I outline above has served me well for years, but previously I was dealing with AUTO_INCREMENT. This sequence generator has me baffled.)
Ok! I have solutions.
[For the sake if these notes, let's call the database: mydata. Also, in JHipster, the MariaDB sequence generator is called: sequence_generator]
Let's consider two situations:
(1) Simple migration
If you are merely migrating the application to a new server, the process is straight forward:
Step 1: On the original server backup and secure your database: mysqldump -u root -p mydata > mydata.sql
Step 2: Transfer the SQL file to the new server, along with the JHipster JAR file
Step 3: On the new server, create an empty database with the same name, and restore the data: mysql -u root -p mydata < mydata.sql
Step 4: Now launch your JHipster application, and everything should work
(2) Model modification
The assumption is that you have modified your model in some way (e.g. added properties to one or more entities). This solution is fiddly, but it works (for me).
Step 1: Backup your database, and secure it (in case something goes wrong): mysqldump -u root -p mydata > mydata.sql
Step 2: Backup and secure the original JHipster JAR that works with the original database
Step 3: Duplicate your database (schema and data) in a new table: mydata_bk
Step 4: Drop your original database, and create a new empty database
Step 5: Launch your new JHipster JAR, and give it time to create the new database schema, then stop the application
Step 6: Use a tool (DataGrip, sqlYog, etc) to compare the old (mydata_bk) and new schema (mydata), and modify the old schema to match the new schema
Step 7: Restore/copy all data from mydata_bk to mydata, EXCEPT for the tables DATABASECHANGELOG, DATABASECHANGELOGLOCK and the special sequence_generator table
Step 8: Open the mydata.sql SQL file, and at the top, after initial comments, one of the first instructions will read:
--
-- Sequence structure for `sequence_generator`
--
DROP SEQUENCE IF EXISTS `sequence_generator`;
CREATE SEQUENCE `sequence_generator` start with 2000 minvalue 1 maxvalue 9223372036854775806 increment by 50 cache 1000 nocycle ENGINE=InnoDB;
SELECT SETVAL(`sequence_generator`, 201050, 0);
The specific numbers may vary, but the broad details will be similar. In a MariaDB SQL console type/execute each of those SQL statements: DROP SEQUENCE ...;, CREATE SEQUENCE ...;, and SELECT SETVAL(...);
Step 9: Launch your JHipster application.
Hope this helps others that run into similar issues. Let me know if you have a better approach!

Push/Export large datframe from R to Vertica database

I have a dataframe of 10M rows which needs to be uploaded back from R to Vertica Database.
The DBwrite() function from DBI is running into memory issues and I have tried increasing memory to 16g by
options(java.parameters = c("-XX:+UseConcMarkSweepGC", "-Xmx16g"))
Still the process is running into memory issue. I am planning to use bulk copy option of vertica to copy the csv file to create the table.
I have created an empty table on vertica
When I am executing the query
dbSendQuery(vertica, "COPY hpcom_usr.VM_test FROM LOCAL \'/opt/mount1/musoumit/MarketBasketAnalysis/Code/test.csv\' enclosed by \'\"\' DELIMITER \',\' direct REJECTED DATA \'./code/temp/rejected.txt\' EXCEPTIONS \'./code/temp/exceptions.txt\'")
I am running into this error.
Error in .verify.JDBC.result(r, "Unable to retrieve JDBC result set", :
Unable to retrieve JDBC result set
JDBC ERROR: [Vertica]JDBC A ResultSet was expected but not generated from query "COPY hpcom_usr.VM_test FROM LOCAL '/opt/mount1/musoumit/MarketBasketAnalysis/Code/test.csv' enclosed by '"' DELIMITER ',' direct REJECTED DATA './code/temp/rejected.txt' EXCEPTIONS './code/temp/exceptions.txt'". Query not executed.
Please help with what i'm doing wrong here.
Vertica also provides STDIN option aswell. Link
Please help me how can I execute this.
My Environment.
CENT OS 7
R 3.6.3 (No R Studio here I have to execute this from CLI)
Tidyverse 1.0.x
Vertica driver 9.x
System 128GB Memory and 28Core system.
Your problem is that you fire dbSendQuery() , which lives with a following dbFetch() and a final dbClearResult() - but only for query SQL statements - those that actually return a result set.
Vertica's COPY <table> FROM [LOCAL] 'file.ext' ... command is treated like a DML command. And for those - as this docu says ...
https://www.rdocumentation.org/packages/DBI/versions/0.5-1/topics/dbSendQuery
.. you need to use dbSendStatement() for data manipulation statements.
Have a go at it that way - good luck ...
dbSendUpdate(vertica, "COPY hpcom_usr.VM_test FROM LOCAL \'/opt/mount1/musoumit/MarketBasketAnalysis/Code/test.csv\' enclosed by \'\"\' DELIMITER \',\' direct REJECTED DATA \'./code/temp/rejected.txt\' EXCEPTIONS \'./code/temp/exceptions.txt\'")
instead of dbSendQuery did the trick for me.

Granting privileges doesn't work

I have created package with couple of procedures, which are working perfectly, when I access package using my own username and password (package owner's).
To access my package from another user ora17, I granted privileges:
grant execute on package_name TO ora17;
then from ora17 user I ran following:
CREATE SYNONYM package_name FOR LOGIN.package_name;
following teacher's instructions.
Trying to access my program from browser, f.e. using url: https://somehost/pls/st12/package_name.customers
I am getting following error:
Thu, 28 Dec 2017 15:12:19 GMT
Failed to parse target procedure
package_name.customers: PROCEDURE DOESN'T EXIST
What am I doing wrong here?
UPD:
executing
describe package_name;
it gives me error:
ORA-04043: object "LOGIN"."PACKAGE_NAME" does not exist
Solution for this was simple, I just should have put owner's username instead of LOGIN here:
CREATE SYNONYM package_name FOR LOGIN.package_name;

Can't able to create table using ORE.create

I had executed the R program and when I try to push the result to a table using
ore.create(score, table="xyz")
I'm getting the following error:
Error in .oci.GetQuery(conn, statement, data = data, prefetch = prefetch, :
ORA-12801: error signaled in parallel query server P007, instance XY.ab.dc.cd:abc (2)
ORA-06520: PL/SQL: Error loading external library
ORA-06522: /app/oracle/product/11.2.0/dbhome_1/lib/librqe.so: cannot open shared object file: No such file or directory
ORA-06512: at "RQSYS.RQROWEVALIMPL", line 20
ORA-06512: at "RQSYS.RQROWEVALIMPL", line 16
ORA-06512: at line 4
Please help to solve this issue since I tried to solve this for the past 1 week and I cant able to as I am new to this.
Any help much appreciated
This looks like a problem with your installation of Oracle R package.
The message indicates your are running on 11gR2. ORE requires 11.2.0.3 or higher, or 11.2.0.1 with a specific patch applied. Check this OTN Forum thread for details.
You need an Oracle Support contract to get hold of these patches. If you don't have a contract you will need to migrate to database 12c in order to use R.

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