I am working with an application using asp.net core 2.2 and efcore database first approach with Oracle database. I am using Oracle.EntityFrameworkCore (2.19.60) nuget package, successfully mapped db model, but when I try to fetch data from DBContext , getting error
ORA-00904: "m"."Id": invalid identifier
Oracle Database version: Oracle Database 12c Standard Edition Release 12.2.0.1.0 - 64bit Production
code:
var fetched = await myDatabaseContext.MyTableVersions.ToListAsync();
LinQ is generating following query :
SELECT "m"."Id", "m"."MAJORVERSION" FROM "MyTableVersions" "m"
Since It's not a correct syntax for PL/Sql query so getting error ORA-00904: "m"."Id": invalid identifier.
Is there any way to fix this error? Thanks.
I have searched on the web and found
Bug 30352492 - EFCORE: ORA-00904: INVALID IDENTIFIER
but that issue is related to schema.
The query is perfectly valid (db<>fiddle here), assuming your table looks something like
CREATE TABLE "MyTableVersions"
("Id" NUMBER,
MAJORVERSION NUMBER)
However, I suspect your table looks like
CREATE TABLE "MyTableVersions"
(ID NUMBER,
MAJORVERSION NUMBER)
I don't know what the class looks like that you're trying to fetch into, but I suspect it has a field named Id. If you can change the name of that field to ID (in other words, so that its capitalization matches the capitalization of the related database column) you might find it works then.
Double quotes are something you should avoid in Oracle world.
Your query:
SELECT "m"."Id", "m"."MAJORVERSION" FROM "MyTableVersions" "m"
means that column name is exactly Id (capital I followed by d). Only if that's really so, you should use double quotes. Otherwise, simply remove them:
SELECT m.id, m.MAJORVERSION FROM MyTableVersions m
The same goes for the table name - if it was created using mixed case (and you can't do that without double quotes), you'll have to use double quotes and exactly same letter case always. Otherwise, don't use them.
Oracle is case-insensitive regarding object and column names and are UPPERCASE by default:
SQL> create table test (id number);
Table created.
SQL> desc test
Name Null? Type
----------------------------------------- -------- -----------------
ID NUMBER
SQL> select table_name, column_name
2 from user_tab_columns
3 where table_name = 'TEST';
TABLE_NAME COLUMN_NAME
------------------------------ ------------------------------
TEST ID
SQL> insert into test (id) values (1);
1 row created.
SQL>
But, if you use mixed case with double quotes, then use them always:
SQL> create table "teST" ("Id" number);
Table created.
SQL> insert into test (id) values (1);
insert into test (id) values (1)
*
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> insert into "test" (id) values (1);
insert into "test" (id) values (1)
*
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> insert into "teST" (id) values (1);
insert into "teST" (id) values (1)
*
ERROR at line 1:
ORA-00904: "ID": invalid identifier
SQL> insert into "teST" ("Id") values (1);
1 row created.
SQL>
So: first make sure what table and column names really are, then use them appropriately.
To avoid problems with case-sensitivity, add the option to eliminate EF to add quotes to the generated queries. For instance, if you are using Devart Oracle provider, this is done in the following way:
public override void ConfigureServices(ServiceConfigurationContext context)
{
Configure<AbpDbContextOptions>(options =>
{
var config = Devart.Data.Oracle.Entity.Configuration.OracleEntityProviderConfig.Instance;
config.Workarounds.DisableQuoting = true;
...
}
}
If you are using official provider - just inherit from DbCommandInterceptor (do quotes replacement with empty character in dbCommand in ...Executing methods), add this interceptor to DbContextOptionsBuilder instance.
Related
I am trying to update a table in Oracle. The table is created using following DDL:
CREATE TABLE TEST (
ID_NUM INTEGER,
NAME INTEGER,
VALUE INTEGER,
ITEMS_NUM INTEGER,
)
And there were some data injected into this table. Now, I need to update the table to change the ID_NUM column as VARCHAR and add formatted UUID as default value.
I have followed the queries given below:
CREATE OR REPLACE FUNCTION RANDOM_UUID RETURN VARCHAR IS
V_UUID VARCHAR(255);
BEGIN
SELECT REGEXP_REPLACE(RAWTOHEX(SYS_GUID()), '([A-F0-9]{8})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{12})', '\1-\2-\3-\4-\5') INTO V_UUID FROM DUAL;
RETURN V_UUID;
END RANDOM_UUID;
ALTER TABLE TEST
DROP COLUMN ID_NUM;
ALTER TABLE TEST
ADD ID_NUM VARCHAR(255) DEFAULT random_uuid() NOT NULL;
It gives an error as SQL Error [4044] [42000]: ORA-04044: procedure, function, package, or type is not allowed here
I have executed and validated the function using following command and it gives a valid formatted UUID.
SELECT RANDOM_UUID() FROM DUAL;
What could be the issue in the ALTER table statement. Can't we use a function for setting default value in Oracle?
Thanks in advance.
I think you can achieve it using the default clause on the column but without function (just replace the function call with the content of the function in default clause) as following. (Please note that the User functions are not allowed in the default clause)
ALTER TABLE TEST
ADD ID_NUM VARCHAR(255)
DEFAULT REGEXP_REPLACE(RAWTOHEX(SYS_GUID()), '([A-F0-9]{8})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{12})', '\1-\2-\3-\4-\5')
NOT NULL;
I have prepared the db<>fiddle demo to show you the error with function and success without function.
Cheers!!
You cannot use PL/SQL functions in the default expression. But it can be a SQL function.Here's an extract from the 19c Doc:
Default column values are subject to the following restrictions:
A DEFAULT expression cannot contain references to PL/SQL functions or
to other columns, the pseudocolumns LEVEL, PRIOR, and ROWNUM, or date
constants that are not fully specified.
And here's an example using a sql function:
SQL> create table tc (c1 number default sqrt(2));
Table TC created.
The default value has to be an actual value, not a function.
I am trying to update a table in Oracle. The table is created using following DDL:
CREATE TABLE TEST (
ID_NUM INTEGER,
NAME INTEGER,
VALUE INTEGER,
ITEMS_NUM INTEGER,
)
And there were some data injected into this table. Now, I need to update the table to change the ID_NUM column as VARCHAR and add formatted UUID as default value.
I have followed the queries given below:
CREATE OR REPLACE FUNCTION RANDOM_UUID RETURN VARCHAR IS
V_UUID VARCHAR(255);
BEGIN
SELECT REGEXP_REPLACE(RAWTOHEX(SYS_GUID()), '([A-F0-9]{8})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{12})', '\1-\2-\3-\4-\5') INTO V_UUID FROM DUAL;
RETURN V_UUID;
END RANDOM_UUID;
ALTER TABLE TEST
DROP COLUMN ID_NUM;
ALTER TABLE TEST
ADD ID_NUM VARCHAR(255) DEFAULT random_uuid() NOT NULL;
It gives an error as SQL Error [4044] [42000]: ORA-04044: procedure, function, package, or type is not allowed here
I have executed and validated the function using following command and it gives a valid formatted UUID.
SELECT RANDOM_UUID() FROM DUAL;
What could be the issue in the ALTER table statement. Can't we use a function for setting default value in Oracle?
Thanks in advance.
I think you can achieve it using the default clause on the column but without function (just replace the function call with the content of the function in default clause) as following. (Please note that the User functions are not allowed in the default clause)
ALTER TABLE TEST
ADD ID_NUM VARCHAR(255)
DEFAULT REGEXP_REPLACE(RAWTOHEX(SYS_GUID()), '([A-F0-9]{8})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{4})([A-F0-9]{12})', '\1-\2-\3-\4-\5')
NOT NULL;
I have prepared the db<>fiddle demo to show you the error with function and success without function.
Cheers!!
You cannot use PL/SQL functions in the default expression. But it can be a SQL function.Here's an extract from the 19c Doc:
Default column values are subject to the following restrictions:
A DEFAULT expression cannot contain references to PL/SQL functions or
to other columns, the pseudocolumns LEVEL, PRIOR, and ROWNUM, or date
constants that are not fully specified.
And here's an example using a sql function:
SQL> create table tc (c1 number default sqrt(2));
Table TC created.
The default value has to be an actual value, not a function.
I create a CakePhp model following the right CakePhp naming conventions and add into the $sequence property the name of the sequence as it was created on the Oracle database.
Inserting one record via sql plus was ok, but inserting data via Cakephp triggers the error:
[code] => 2289
[message] => ORA-02289: the sequence does not exists
[offset] => 7 [sqltext] => SELECT my_sql_table_seq.currval FROM dual
Even after cleaning up the tmp/cache content i see the same error as if cakephp try to guess the sequence name even having the sequence property named in the right way.
Is there a way to see why it happens ?
It's obvious that you don't have a sequence called my_sql_table_seq in your oracle schema,
or perhaps you have this sequence in another schema and you're missing related schema name as prefix let's call myschema : select myschema.my_sql_table_seq.currval from dual;
( provided your schema is granted for this sequence to execute ) :
SQL> conn otherschema/password1
SQL> grant execute on my_sql_table_seq to myschema;
SQL> conn myschema/password2
SQL> select otherschema.my_sql_table_seq.currval from dual;
or just create a sequence :
SQL> conn myschema/password2
SQL> create sequence my_sql_table_seq increment by 1 minvalue 0;
SQL> select my_sql_table_seq.currval from dual;
I have an insert statement that I am trying to run against an Oracle database. The insert statement is very simple, and I only want to insert a value into one column. The table itself has more than one column, but I am only interested in filling one of the columns with data. The format of my query is similar to the one below:
insert into myTable (col1) Values (val1)
However, this throws the following error:
ORA-00904: "col1": invalid identifier
I've checked to make sure that the column is named correctly, and my only other thought is that something is wrong with my syntax. There are no constraints on the table such as primary keys. Is it possible to only insert values into certain columns when executing an insert statement in Oracle?
Check that you didn't quote the column name on creation of the table. If you did, the column name is stored as you quoted it. For example:
create table table1 (
id number(2)
)
has a different column name to this
create table table2 (
"id" number(2)
)
Oracle by default stores the (unquoted) column names in uppercase. Quoted are stored as is.
You can use a DESC table_name to see how the columns are stored.
The following
select id from table1
select iD from table1
select ID from table1
fetch the records, while only
select "id" from table2
will fetch records.
select id from table2
will throw the ORA-00904 : "ID" : invalid identifier error.
You may have inadvertently done the quoting during creation while using tools as established below:
https://community.oracle.com/thread/2349926
Btw: Yes it is possible to insert records for only one column, as long as the other columns do not have a NOT NULL constraint on them.
Actually, I think you may be double quoting the column in the insert statement (not on table creation), although your example is misleading. I guess this because of your error, which says "col1" is invalid, not "COL1" is invalid. Consider this simple test:
SQL> create table mytable
(
col1 varchar2(10)
)
Table created.
SQL> -- incorrect column name, without double quotes
SQL> insert into mytable(col2) values ('abc')
insert into mytable(col2) values ('abc')
Error at line 9
ORA-00604: error occurred at recursive SQL level 1
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at line 11
ORA-00904: "COL2": invalid identifier
SQL> -- incorrect column name, with double quotes
SQL> insert into mytable("col2") values ('abc')
insert into mytable("col2") values ('abc')
Error at line 12
ORA-00604: error occurred at recursive SQL level 1
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at line 11
ORA-00904: "col2": invalid identifier
SQL> -- correct column name, without double quotes (works)
SQL> insert into mytable(col1) values ('abc')
1 row created.
SQL> -- correct column name, with double quotes (fails)
SQL> insert into mytable("col1") values ('abc')
insert into mytable("col1") values ('abc')
Error at line 18
ORA-00604: error occurred at recursive SQL level 1
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at line 11
ORA-00904: "col1": invalid identifier
The last failed insert attempt is what I think you may be doing:
insert into mytable("col1") values ...
based on the error message:
ORA-00904: "col1": invalid identifier
So the solution would simply be remove the double quoting around the column name in the insert.
It's most probably a syntax error
Desc myTable;
insert into myTable (col1) Values ('val1')
Ensure col1 is a valid column in the table, and you're simply not trying to say 'select the left-most column.
edit: Is it possible to only insert values into certain columns when executing an insert statement in Oracle?
Yes if you want to only insert into certain columns then simply specify it
e.g.
insert into myTable (col1, col2, col6) Values ('val1', 'val2', 'val3');
This will only work if the column itself doesn't have a NOT NULL constraint - in which case it will not allow a value to be enetered (unless again there's a default value).
One day, I accidently issued a CREATE statement on SQL prompt in Oracle 9i with all columns enclosing within double quotation marks as below.
CREATE TABLE emp("emp_id" VARCHAR2(6) primary key,
"emp_name" VARCHAR2(30) not null, "salary" NUMBER);
instead of issuing it as the one mentioned below without enclosing the column names within quotation marks as usual.
CREATE TABLE emp(emp_id VARCHAR2(6) primary key,
emp_name VARCHAR2(30) not null, salary NUMBER);
This simple query (first mentioned) worked just fine with no problem at all and the emp table was created successfully just then I have created three rows into this table with the following INSERT command.
INSERT INTO emp VALUES("E0001", "Henery", 50000);
INSERT INTO emp VALUES("E0002", "Alex", 65000);
INSERT INTO emp VALUES("E0003", "Peter", 70000);
Three rows created successfully into the emp table. I then executed a SELECT statement to verify whether they were created or not and found that they were indeed created.
SELECT * FROM emp;
but when I executed the SELECT statement like the one below
SELECT emp_id, emp_name, salary FROM emp;
I made sure that though, I had used the same column names as they were actually in the emp table, Oracle issued an error indicating that "Such columns don't exist."
From the SQL Language Reference:
"A quoted identifier begins and ends with double quotation marks (").
If you name a schema object using a quoted identifier, then you must
use the double quotation marks whenever you refer to that object."