I have this query:
SELECT
case
when
AddressType IN (select code.codeid from code where code.codeset = AddressTypeCodeSet and code.description like 'Postal%')
then 'PostalAddress'
when
AddressType IN (select code.codeid from code where code.codeset = AddressTypeCodeSet and code.description like 'Email%')
then
'EmailAddress'
else
'OtherAddress'
end as AddressType
FROM VW_Address
WHERE AddressId=190000;
When I execute this query using SQL Developer, the result returned is OtherAddress. This is what I'm expecting. However, when I execute the same query via this code:
Dim cmd =
New Oracle.DataAccess.Client.OracleCommand(["SQL HERE]")
cmd.Parameters.Add(":p0", OracleDbType.Int32)
cmd.Parameters(0).Value = 190000
cmd.BindByName = True
Dim r = cmd.ExecuteReader()
I get a different result: EmailAddress
ODP is version 2.111.7.20, Oracle is 11g.
Related
When I execute the following code the value dr.HasRows is false, and dr.Read() returns false. The same query running in SQL Developer returns 10 rows:
var allTablesSql = "select * from all_tables where table_name = 'ADDFIELDSPIPES'";
var cmd = new OracleCommand(allTablesSql, conn);
cmd.CommandType = CommandType.Text;
var dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
if (dr.Read())
{
// We have rows!
}
If I change my query to be as follows then dr.HasRows is true and dr.Read() returns true:
var allTablesSql = "select * from all_tables where table_name like '%'";
I suspect that ODP.NET somewhere and somehow queries metadata before executing the SQL string that I supply, and this metadata query somehow prevents ODP.NET from returning any rows for my query.
Already checked this post: SSIS and sending query with date to Oracle
And I'm using variable query per below thread
SSIS - Using parameters in Oracle Query using Attunity Oracle Datasource
Tool used: VS-2019
Data flow: MS Oracle Source (for VS-2019)
My source is Snowflake cloud. I'm successfully able to get the max date from table and store in Object type variable (named:- #var_Snowflake_Table_maxDate). Then I use a script task to convert the value to string type.
Code for script task is:
public void Main()
{
OleDbDataAdapter A = new OleDbDataAdapter(); //using System.Data.OleDb; ADDED above in NAMESPACES
System.Data.DataTable dt = new System.Data.DataTable();
A.Fill(dt, Dts.Variables["User::var_Snowflake_Table_maxDate"].Value);
foreach (DataRow row in dt.Rows)
{
object[] array = row.ItemArray;
Dts.Variables["User::var_CreateDate"].Value = array[0].ToString();
}
Dts.TaskResult = (int)ScriptResults.Success;
}
This sets my param of #var_CreateDate String type correctly. I tried this on local machine and was able to pass the value to a native instance of sql-server(yes NOT oracle). Just to test my parameters from script task works.
Finally: I'm using VS-2019's MS Oracle Source to pass the value into Oracle cloud server. Sample query's I have tried
"select * from Table where rownum <= 5 and NVL(CREATE_DATE,UPDATE_DATE) = " +"'05-09-2020'"
::::evals to::::
select * from relate.awd_acct_activity where rownum <= 5 and NVL(CREATE_DATE,UPDATE_DATE) = '2020-05-09'
and this works. But value is hard coded.
Try 2:
"select * from table where rownum <= 50 and
NVL(CREATE_DATE,UPDATE_DATE) = " +"'#[User::var_CreateDate]'"
Try 3:
"select * from table where rownum <= 50 and
NVL(CREATE_DATE,UPDATE_DATE) = to_date(" +"'#[User::var_CreateDate]'"+")"
Try 4:
"select * from table where rownum <= 50 and
NVL(CREATE_DATE,UPDATE_DATE) = to_date(" +"'#[User::var_CreateDate]'"+",'YYYY-MM-DD')"
None of try 2 through 4 eval correctly. Can I have some guidance into how to pass this parameter to Oracle cloud.
Thanks.
I'm assuming you're trying to figure out the syntax for a variable, that would hold the query text. You can try something like this:
"select * from table where rownum <= 50 and
NVL(CREATE_DATE,UPDATE_DATE) = to_date(" + "'" + #[User::var_CreateDate] + "'" + ",'YYYY-MM-DD')"
I have the following query which correctly returns records when I execute it via code or Oracle SQL Developer.
SELECT TABLE_T.COL_P,
1234 AS COL_C,
TABLE_T.COL_D,
SUM(SOME_COLUMN) Value
FROM TABLE_T
INNER JOIN TABLE_E E ON TABLE_T.COL_P = E.COL_P
AND TABLE_T.COL_C = E.COL_C
AND TABLE_T.COL_CC = E.COL_CC
AND TABLE_T.COL_CL = E.COL_CL
INNER JOIN TABLE_C C1 ON C1.COL_P = E.COL_P
AND C1.COL_C = E.COL_C
INNER JOIN TABLE_C C2 ON C2.COL_P = C1.COL_P
AND C2.COL_CX = C1.COL_CX
AND C2.COL_CY = C1.COL_CY
AND C2.COL_CZ = C1.COL_CZ
WHERE TABLE_T.COL_P = 'Some Text'
AND C2.COL_C = 1234
AND TABLE_T.COL_CL IN
(SELECT COL_CL
FROM TABLE_CL
WHERE COL_P = 'Some Text'
AND ((COL_CLTYPE = 'VALUE_A')
OR (COL_CLTYPE = 'VALUE_B')
OR (COL_CLTYPE = 'VALUE_C')
OR (COL_CLTYPE = 'VALUE_D')) )
GROUP BY TABLE_T.COL_P,
TABLE_T.COL_D
However, it fails to return records once I execute the following session commands:
ALTER SESSION SET NLS_COMP = LINGUISTIC;
ALTER SESSION SET NLS_SORT = BINARY_CI;
This problem only occurs when I'm running against an Oracle 12c or 18c database.
It works find with/without the session commands when running against an Oracle 12C R2 or 11g database.
I've already checked the Explain Plan for 12c/18c and 12cR2 and its creating the same plan.
I found out that by adding an ORDER BY clause to the query (ORDER BY TABLE_T.COL_D, it resolves the problem.
Any ideas on what might be causing this problem?
I know the ORDER BY solution works, but I'd like to know what the underlying cause is and if there's a better solution to it.
I am reading data from Oracle database by using ODP.Net with the follwing code
OracleConnection con = new OracleConnection(connectionString);
OracleCommand cmd = new OracleCommand( SELECT ID,RECORD(XMLType) FROM tbl_Name, con);
con.Open();
OracleDataReader _dataReader = cmd.ExecuteReader();
while (_dataReader.Read())
{
string rowId = _dataReader[0].ToString();
string xmlString = _dataReader[1].ToString();
adding this data into Queue for further processing
}
It working fine but in a minute it's reading only 10000 record. If I use SqlServer database it's reading 500000 record in minute having table with same schema.
Please help me if I am missing something to read data faster using ODP.NET
Thank you.
**
ANSWER:
**
I have tried with GetClobVal() and GetString Val() functions, now it is working fine.
select t.RECID, t.XMLRECORD.GetClobVal() from tableName t"
select x.RECID,x.XMLRECORD.getStringVal() from tableName x"
If we use these queries with oracle command it will run fast, but not as fast as sql server query.
I'm trying to implement a simple search, using LIKE in my SQL statement:
Using cmd As New OracleCommand
cmd.Connection = conn
cmd.CommandType = CommandType.Text
cmd.CommandText = "select * from TABLE where FIELD like '%:text%'"
cmd.Parameters.AddWithValue("text", searchValue)
...
End Using
This doesn't work - what is the best way to parameterize the search value?
select * from TABLE where FIELD like ('%' || :text || '%')
update: my bad, if you are using oracle driver, see this link for help. this depends on which driver you use for db access, in case of oledb you need to do following
here is corrected code:
Using cmd As New OracleCommand
cmd.Connection = conn
cmd.CommandType = CommandType.Text
cmd.CommandText = "select * from TABLE where FIELD like ?"
cmd.Parameters.AddWithValue("#text", '%'+searchValue+'%')
...
End Using
in case of oracle driver you need to do following:
Using cmd As New OracleCommand
cmd.Connection = conn
cmd.CommandType = CommandType.Text
cmd.CommandText = "select * from TABLE where FIELD like :text"
cmd.Parameters.AddWithValue(":text", '%'+searchValue+'%')
...
End Using
In cases like this I prefer this syntax:
select * from TABLE where INSTR(FIELD, :text) > 0