I've done my first little "hello world" with hibernate, inserting some data in my SQLServer db. Now I'm trying to switch db without change the annotation on my domain classes, and I'm having problems.
I've tried to use a behaviour that let the handling of the id on the db, using an identity column on sql server and a sequence with a trigger on oracle (and i was thinking to do the same with postgres), so i declared in my class
#Id
#Column(name = "ID")
#GeneratedValue(strategy=GenerationType.AUTO)
public long getId() {
return this.id;
}
this work well on SQLServer, but it give me this error on Oracle:
[main] ERROR org.hibernate.util.JDBCExceptionReporter - ORA-02289: sequence does not exist
org.hibernate.exception.SQLGrammarException: could not get next sequence value
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.SequenceGenerator.generateHolder(SequenceGenerator.java:132)
at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:105)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at test.Main.main(Main.java:23)
Caused by: java.sql.SQLSyntaxErrorException: ORA-02289: sequence does not exist
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:91)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:206)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:455)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:413)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:1034)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:194)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:791)
at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:866)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3387)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3431)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1491)
at org.hibernate.id.SequenceGenerator.generateHolder(SequenceGenerator.java:112)
... 11 more
note that also with strategy=GenerationType.SEQUENCE i got the same error
I was wondering: is there any way to do what i'm trying?
Sorry, i posted the wrong stackTrace, the correct one is:
[main] ERROR org.hibernate.util.JDBCExceptionReporter - ORA-02289: sequence does not exist
org.hibernate.exception.SQLGrammarException: could not get next sequence value
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.SequenceGenerator.generateHolder(SequenceGenerator.java:132)
at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:105)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at test.Main.main(Main.java:23)
Caused by: java.sql.SQLSyntaxErrorException: ORA-02289: sequence does not exist
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:91)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:206)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:455)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:413)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:1034)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:194)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:791)
at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:866)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3387)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3431)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1491)
at org.hibernate.id.SequenceGenerator.generateHolder(SequenceGenerator.java:112)
... 11 more
note that also with strategy=GenerationType.SEQUENCE i got the same error
It's strange that hibernate is attempting to use IDENTITY generation when you use AUTO. Try using SEQUENCE generation for Oracle9i. Here's an example given in JBoss documentation.
#Entity
#javax.persistence.SequenceGenerator(
name="SEQ_STORE",
sequenceName="my_sequence"
)
public class Store implements Serializable {
private Long id;
#Id
#GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ_STORE")
public Long getId() { return id; }
}
Take a look at this page for documented list of supported generation types on different DB dialects.
Related
I'm running big dependency scan on legacy db and see that some objects have obsolete ref links, if you run this code in SSMS for View that points to not existing table like in my case, you will get your output on Results tab AND error info in Messages . Like in my case below.
I tried to check all env things I know and output of this stored procedure, but didn't see any indication.
How I can capture this event as I'm running this in looped dynamic SQL script and capture output in my table for further processing?
Updated:
it just text in Message box ,on error, you still have output on
Results tab
this is sp, it loop thru object list I took from sys.object and run this string as my sample to get all dependencies, load all into table. This call to
sql_reference_entities is the only way to get inter database
dependency on column level. So I need stick to this 100$>
--
Select *
From sys.dm_sql_referenced_entities('dbo.v_View_Obs_Table','Object')
--
----update------
This behavior was fixed in SQL Server 2014 SP3 and SQL Server 2016 SP2:
Starting from Microsoft SQL Server 2012, errors raised by
sys.dm_sql_referenced_entities (such as when an object has undergone a
schema change) cannot be caught in a TRY...CATCH Transact-SQL block.
While this behavior is expected in SQL Server 2012 and above, this
improvement introduces a new column that's called is_incomplete to the
Dynamic Management View (DMV).
KB4038418 - Update adds a new column to DMV sys.dm_sql_referenced_entities in SQL Server 2014 and 2016
----update-------
The tldr is that you can't capture these on the server side, and must use a client program in C#, PowerShell or some other client that can process info messages.
That DMV is doing something strange that I don't fully understand. It's generating errors (which a normal UDF is not allowed to do), and those errors do not trigger a TRY/CATCH block or set ##error. EG
create table tempdb.dbo.foo(id int)
go
create view dbo.v_View_Obs_Table
as
select * from tempdb.dbo.foo
go
drop table tempdb.dbo.foo
go
begin try
Select * From sys.dm_sql_referenced_entities('dbo.v_View_Obs_Table','Object')
end try
begin catch
select ERROR_MESSAGE(); --<-- not hit
end catch
However these are real errors, as you can see running this from client code:
using System;
using System.Data.SqlClient;
namespace ConsoleApp6
{
class Program
{
static void Main(string[] args)
{
using (var con = new SqlConnection("Server=.;database=AdventureWorks;integrated security=true"))
{
con.Open();
con.FireInfoMessageEventOnUserErrors = true;
con.InfoMessage += (s, a) =>
{
Console.WriteLine($"{a.Message}");
foreach (SqlError e in a.Errors)
{
Console.WriteLine($"{e.Message} Number:{e.Number} Class:{e.Class} State:{e.State} at {e.Procedure}:{e.LineNumber}");
}
};
var cmd = con.CreateCommand();
cmd.CommandText = "Select * From sys.dm_sql_referenced_entities('dbo.v_View_Obs_Table','Object')";
using (var rdr = cmd.ExecuteReader())
{
while (rdr.Read() || (rdr.NextResult() && rdr.Read()))
{
Console.WriteLine(rdr[0]);
}
}
Console.ReadKey();
}
}
}
}
outputs
Invalid object name 'tempdb.dbo.foo'.
Invalid object name 'tempdb.dbo.foo'. Number:208 Class:16 State:3 at v_View_Obs_Table:4
0
The dependencies reported for entity "dbo.v_View_Obs_Table" might not include references to all columns. This is either because the entity references an object that does not exist or because of an error in one or more statements in the entity. Before rerunning the query, ensure that there are no errors in the entity and that all objects referenced by the entity exist.
The dependencies reported for entity "dbo.v_View_Obs_Table" might not include references to all columns. This is either because the entity references an object that does not exist or because of an error in one or more statements in the entity. Before rerunning the query, ensure that there are no errors in the entity and that all objects referenced by the entity exist. Number:2020 Class:16 State:1 at :1
I am using a camel jdbc component to insert a record into an Oracle table. the insert uses a sequence to populate a primary key ID column.
INSERT INTO my_table (id, data) VALUES (my_seq.nextval, 'some data')
The relevant part of the route looks like below:
from("some end point here")
.process(preInsertProcessor)
.to("jdbc:myDataSource")
.process(new Processor() {
public void process(Exchange exchange) throws Exception {
LOGGER.info("Extracting database generated id");
// This list is null
List<Integer> ids = exchange.getIn().getHeader(
JdbcConstants.JDBC_GENERATED_KEYS_DATA, List.class);
});
Inside the preInsertProcessir I set the message body to be my insert statement and also set some two header values to instruct camel I want the generated ID back:
message.setBody("INSERT INTO my_table (id, data) VALUES (my_seq.nextval, ?:data)");
message.setHeader("data", "some data");
message.setHeader(JDBC_RETRIEVE_GENERATED_KEYS, true);
message.setHeader(JDBC_GENERATED_COLUMNS, new String[]{"ID"});
End if I look at the logs I can see:
[DEBUG] org.apache.camel.component.bean.MethodInfo - Setting bean invocation result on the OUT message: [Message: INSERT INTO my_table(id, data)VALUES (my_seq.nextval, :?data]
[DEBUG] org.apache.camel.spring.spi.TransactionErrorHandler - Transaction begin (0x1de4bee0) redelivered(false) for (MessageId: ID-MELW1TYGC2S-62650-1438583607644-0-8 on ExchangeId: ID-MELW1TYGC2S-62650-1438583607644-0-9))
[INFO ] au.com.nab.cls.router.non.repudiation.GeneratedIdExtractor - Extracting database generated id
[DEBUG] org.apache.camel.processor.MulticastProcessor - Done sequential processing 1 exchanges
[DEBUG] org.apache.camel.spring.spi.TransactionErrorHandler - Transaction commit (0x1de4bee0) redelivered(false) for (MessageId: ID:414d5120445041594855423120202020027844552045b302 on ExchangeId: ID-MELW1TYGC2S-62650-1438583607644-0-7))
If I get it well from the look of the logs the insert would be executed and my final processor should be able to get the generated ID. In reality what happens is that no record gets inserted and no ID is present in the header of the message. Without the final processor everything works fine.
Obviously I am doing something wrong here but I cannot figure out what. I am aware I could use a message en-richer to get the ID before the insert but I would prefer to avoid an extra database trip.
Thank you in advance for your inputs.
UPDATE
I put a break point in org.apache.camel.component.jdbc.JdbcProducer and found out the reason for not having the INSERT executed and consequently not getting the ID back.
// JdbcProducer code; creating a prepared statement part
if (shouldRetrieveGeneratedKeys) {
...
} else if (expectedGeneratedColumns instanceof String[]) {
// Execution gets herestatement
ps = conn.prepareStatement(preparedQuery, (String[]) expectedGeneratedColumns);
...
}
// Expected count returned here is 2
int expectedCount = ps.getParameterMetaData().getParameterCount();
if (expectedCount > 0) {
...
// And here I get the crash:
// java.sql.SQLException: Number of parameters mismatch. Expected: 2, was:1
getEndpoint().getPrepareStatementStrategy().populateStatement(ps, it, expectedCount);
}
This is where my research stopped as digging too much in the various three parties code is not really easy. I suspect one of the following two options are the cause:
I am still not doing it the right way
A camel bug which does not work as expected when header contains both named parameters and retrieve generated keys settings
Please advise about any fix or work around.
Thanks again
I also ran into this. My workaround:
Use camel-sql instead of camel-jdbc. Add parametersCount option to the endpoint URL (in adddition to setHeader(SqlConstants.SQL_RETRIEVE_GENERATED_KEYS, constant(true)) and setHeader(SqlConstants.SQL_GENERATED_COLUMNS, constant(new String[] {"ID_COLUMN_NAME"})).
Update: Works with 11.2.0.4 jdbc driver (does not work with 12.2.0.1 jdbc driver).
I have the following custom type on Postgres:
CREATE TYPE my_custom_type AS (
field_a VARCHAR,
field_b NUMERIC(10,3)
);
and the following table:
CREATE TABLE my_table
(
COL1 VARCHAR(120) NOT NULL,
CUSTOM_COLUMN my_custom_type,
CUSTOM_COLUMN_ARRAY my_custom_type[]
);
Everything works fine when I use my custom type with JOOQ:
#Test
public void testWithoutArray(){
MyTableRecord record = dsl.newRecord(MyTable.MY_TABLE);
record.setCol1("My Col1");
MyCustomType customType = new MyCustomType();
customType.setFieldA("Field A Val");
customType.setFieldB(BigDecimal.ONE);
record.setCustomColumn(customType);
record.store();
}
However, when I try to set some value in the field mapped to a custom type array, I have the following error:
#Test
public void testWithArray(){
MyTableRecord record = dsl.newRecord(MyTable.MY_TABLE);
record.setCol1("My Col1");
MyCustomTypeRecord customType = new MyCustomTypeRecord();
customType.setFieldA("Field A Val 1");
customType.setFieldB(BigDecimal.ONE);
MyCustomTypeRecord customType2 = new MyCustomTypeRecord();
customType2.setFieldA("Field A Val 2");
customType2.setFieldB(BigDecimal.TEN);
record.setCustomColumnArray(new MyCustomTypeRecord[]{customType, customType2});
record.store();
}
org.jooq.exception.DataAccessException: SQL [insert into "my_table" ("col1", "custom_column_array") values (?, ?::my_custom_type[]) returning "my_table"."col1"]; ERROR: malformed record literal: "my_custom_type"(Field A Val 1, 1)"
Detail: Missing left parenthesis.
at org.jooq.impl.Utils.translate(Utils.java:1553)
at org.jooq.impl.DefaultExecuteContext.sqlException(DefaultExecuteContext.java:571)
at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:347)
at org.jooq.impl.TableRecordImpl.storeInsert0(TableRecordImpl.java:176)
at org.jooq.impl.TableRecordImpl$1.operate(TableRecordImpl.java:142)
at org.jooq.impl.RecordDelegate.operate(RecordDelegate.java:123)
at org.jooq.impl.TableRecordImpl.storeInsert(TableRecordImpl.java:137)
at org.jooq.impl.UpdatableRecordImpl.store0(UpdatableRecordImpl.java:185)
at org.jooq.impl.UpdatableRecordImpl.access$000(UpdatableRecordImpl.java:85)
at org.jooq.impl.UpdatableRecordImpl$1.operate(UpdatableRecordImpl.java:135)
at org.jooq.impl.RecordDelegate.operate(RecordDelegate.java:123)
at org.jooq.impl.UpdatableRecordImpl.store(UpdatableRecordImpl.java:130)
at org.jooq.impl.UpdatableRecordImpl.store(UpdatableRecordImpl.java:123)
The query generated by JOOQ debugg is the following:
DEBUG [main] org.jooq.tools.LoggerListener#debug:255 - Executing query : insert into "my_table" ("col1", "custom_column_array") values (?, ?::my_custom_type[]) returning "my_table"."col1"
DEBUG [main] org.jooq.tools.LoggerListener#debug:255 - -> with bind values : insert into "my_table" ("col1", "custom_column_array") values ('My Col1', array[[UDT], [UDT]]) returning "my_table"."col1"
Am I missing some configuration or is it a bug?
Cheers
As stated in the relevant issue (https://github.com/jOOQ/jOOQ/issues/4162), this is a missing piece of support for this kind of PostgreSQL functionality. The answer given in the issue so far is:
Unfortunately, this is an area where we have to work around a couple of limitations of the PostgreSQL JDBC driver, which doesn't implement SQLData and other API (see also pgjdbc/pgjdbc#63).
Currently, jOOQ binds arrays and UDTs as strings. It seems that this particular combination is not yet supported. You will probably be able to work around this limitation by implementing your own custom data type Binding:
http://www.jooq.org/doc/latest/manual/code-generation/custom-data-type-bindings/
Currently working on an ASP.Net MVC 4 application using Entity Framework 5. Used CodeFirst for initial development phase. But have now disabled the Automatic Migrations and designing new tables directly using SSMS and writing POCO. Everything is working good.
Recently, identified a weird issue in Production. The records in one of the initially designed tables skipped auto-increment identity value by more than 900 numbers. This has happened 3 times within last 3 months. Debugged the application locally but could not reproduce. There isn't any pattern or trend observed.
Model:
public class Enquiry
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public Int64 EnquiryId { get; set; }
[Required]
public int UserId { get; set; }
[Required]
public byte Bid { get; set; }
...
[Required]
public DateTime Created { get; set; }
[Required]
public DateTime Modified { get; set; }
}
public class EnquiryDetail
{
[Key]
public Int64 EnquiryId { get; set; }
[Required]
public int CreditScore { get; set; }
[Required]
public byte BidMode { get; set; }
public virtual Enquiry Enquiry { get; set; }
}
DBContext:
public class EscrowDb : DbContext
{
public EscrowDb()
: base("name=DefaultConnection")
{
}
public DbSet<Enquiry> Enquiries { get; set; }
public DbSet<EnquiryDetail> EnquiryDetails { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Entity<EnquiryDetail>()
.HasRequired<Enquiry>(ed => ed.Enquiry)
.WithRequiredDependent(e => e.EnquiryDetail);
}
}
Controller:
[Authorize]
public class EnquiryController : Controller
{
private EscrowDb _db = new EscrowDb();
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(EnquiryViewModel core)
{
var enquiry = new Enquiry();
// Some code to set properties using passed ViewModel
...
var enquiryDetail = new EnquiryDetail();
// Some code to set properties using passed ViewModel
...
enquiry.EnquiryDetail = enquiryDetail;
_db.Enquiries.Add(enquiry);
_db.SaveChanges();
}
}
All this code has been working fine so far except the identity value getting skipped sporadically by large gaps of almost 1000 numbers.
Has anybody come across such kind of issue? Please share your thoughts.
You may be out of luck here if you need to eliminate these gaps.
I hit this issue myself as I am developing/testing a new application. I'm intuiting what's happening here in sql azure based on what I've read about sql server 2012. I have not been able to find any documentation about this for sql azure.
From what I've read this is a feature that comes across as a bug IMO. In Sql server 2012 Microsoft added the ability to create sequences. Sequences record what values have been used in blocks of 1000. So lets say your sequence was progressing... 1, 2, 3, 4, 5... and then your sql server restarts. Well the sequence has already saved the fact that the block 1-1000 have already been used so it jumps you to the next 1000.... so your next value are 1001, 1002, 1003, 1004.... This improves performance of inserts when using sequences, but can result in unusual gaps. There is a solution to this for your sequence. When specifying you sequence add the "NOCACHE" parameter so that it doesn't save blocks of 1000 at a time. See here for more documentation.
Where this becomes an issue is that the Identity columns seem to have been changed to use this same paradigm. So when your server, or in this case your sql azure instance restarts you can get large gaps (1000's) in your identity columns because it is caching large blocks as "used". There is a solution to this for sql server 2012. You can specify a startup flag t272 to revert your identity to using the old sql server 2008 r2 paradigm. The problem is that I'm unaware (it may not be possible) of how to specify this in sql Azure. Can't find documentation. See this thread for more details on sql server 2012.
Check the documentation of identity here in the msdn. Specifically the section "Consecutive values after server restart or other failures". Here is what it says:
Consecutive values after server restart or other failures –SQL Server
might cache identity values for performance reasons and some of the
assigned values can be lost during a database failure or server
restart. This can result in gaps in the identity value upon insert. If
gaps are not acceptable then the application should use a sequence
generator with the NOCACHE option or use their own mechanism to
generate key values.
So if you need to have consecutive values you could try specifying a sequence with nocache instead of relying on your identity column. Haven't tried this myself, but sounds like you'll have trouble getting this to work with entity framework.
Sorry if this doesn't help much, but at least it's some info on what your experiencing.
Try the reseeding with trigger approach. I believe this should solve it example of its use and see more walkarounds at that link.
USE [TEST]
CREATE TABLE TEST(ID INT IDENTITY(1,1),VAL VARCHAR(10))
CREATE TRIGGER TGR_TEST_IDENTITY ON TEST
FOR INSERT
AS
DECLARE #RESEEDVAL INT
SELECT #RESEEDVAL = MAX(ID) FROM TEST
DBCC CHECKIDENT('TEST', RESEED, #RESEEDVAL)
INSERT INTO TEST(VAL)VALUES('a')
SELECT * FROM TEST
Since 'DBCC CHECKIDENT' is not supported in Azure now you can use the approach in this link
In that link i got some work arounds
Use GUID as key when using auto key of your SqlAzure
If integer key like my case let the record insert and go back and delete it and re insert it with the right key by Turing off identity with
set identity_insert XXXTable on -- this basically turns off IDENTITY
and then turning back on identity again when i am through with the insertion with the right key using
set identity_insert XXXTable off --this basically turns on IDENTITY
Note: this is not a good solution for a table that is receiving a massive insert request but might be useful for someone looking for a temporary way out
It seems there is no TF 272 work around for SQL Azure. I just noticed the issue in 2 tables (gaps of 999 and 1000) and thought it was a security breach before inspecting the two tables and checking inserted records.
See the last item of this MS TechNet discussion for details. Kind of re-assuring, but looks more like a bug than a feature.
I had this problem too and until this time i can not find any way, it seems entity has a bug or something like this.
i search on internet but fount nothing
This can happen easy. Beside server issues, this can be normal in application logic. Do not expect to make too much logic for identity values. But make your own numbers if you need them to mean something.
A very common reason I see this, is for rolled back transactions, which is good. I See the sample to reproduce in SQL server. This would, expectedly, affect anything such as MVC or entity framework using the database:
DROP TABLE IF EXISTS #PKIDTest
CREATE TABLE #PKIDTest (PKID INT IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED, Msg VARCHAR(100))
BEGIN TRANSACTION
INSERT INTO #PKIDTest (Msg) VALUES ('The'),('quick'),('brown fox'),('jumped'),('over')
COMMIT
SELECT * FROM #PKIDTest --PKID: 1-5
BEGIN TRANSACTION
INSERT INTO #PKIDTest (Msg) VALUES ('the'),('alzy'),('dog')
--PKID 6-8
ROLLBACK --"spelling error"
SELECT * FROM #PKIDTest --PKID: 1-5 (6-8 rolled back)
BEGIN TRANSACTION
INSERT INTO #PKIDTest (Msg) VALUES ('the'),('lazy'),('dog')
COMMIT
SELECT * FROM #PKIDTest --PKID: 1-5 , 9-11 (6-8 rolled back)
If you are seeing this behavior and do not expect to have rolled back transactions or removed rows, consider checking your error handling code to see if you are logging the errors. It is good to have a way to log when unexpected errors occur.
If you have a logging solution in place, consider trying to correlate the timeframes that the "skipped" values occur, and events in your log.
How to check the defined error class of a connection (DSI) of Sybase Replication Server?
I use alter connection to change the error class associated to the DSI but I want a command that list its information in order to confirm that the error class was correctly associated.
How can I do that?
You can see it by calling rs_getconn in the RSSD database.
I don't see any rs_getconn stored proc in an RSSD database for a 15.7.1 repserver.
I do see a ral_connection_details proc which seems to do the job (example output connecting with sqsh):
> ral_connection_details "MY_ASE_SERVER", "MyDB"; -mvert
dsname: MY_ASE_SERVER
dbname: MyDB
error class: rs_sqlserver_error_class
function string class: rs_sqlserver_function_class
username: mylogin
password: NULL -- Note, the password *isn't* null, whatever
dbid: 123
Not sure where rs_getconn and ral_connection_details came from (3rd party app? custom proc? one of a slew of fly-by-night SRS management tools Sybase provided over the years?), but the simplest (and guaranteed to be in any RSSD going back eons - unless someone dropped it) is the rs_helpdb stored proc.
rs_helpdb generates a result set showing dsname, dbname, did, prs, error and function classes; for RS 15.7+ you'll also get connid (associated with multipath rep / alternate connections) and the repserver error class.