Query slow when executing using prepared statement compared to sqlDeveloper
Oracle version is 10.2.0.1.0.
I have got a query which when submitted from java code using prepared statement and parameter substitutions, takes more than 20 seconds to give results.
I can see this SELECT sql sitting there when I run Monitor Sessions through sqlDeveloper, with its wait time increasing and then finally getting through. During that time no other SQLs are waiting.
DURING THAT TIME then I am able to run the same query (with values included) multiple times using sqlDeveloper, and it gives results in no time.
Sqldeveloper connects using thin client using lib provided by oracle in windows.
Java code runs from linux and uses the thin client using lib provided by oracle in linux.
Both are hitting the same DB running on a separate Linux machine.
What could be the cause of this problem?
What db parameters, queries should I run to identify the bottleneck?
Edited by: user10390517 on Jun 14, 2010 3:06 AM
Hi Rob,
at least you should see some differences in the statistics for the different child cursor (the one for the execution in the application should show at least a higher value for ELAPSED_TIME). I would use something like the following query to check the information for the child cursors:
select sql_id
, PLAN_HASH_VALUE
, CHILD_NUMBER
, EXECUTIONS
, ELAPSED_TIME
, USER_IO_WAIT_TIME
, CONCURRENCY_WAIT_TIME
, DISK_READS
, BUFFER_GETS
, ROWS_PROCESSED
from v$sql
where sql_id = your_sql_idRegards
Martin
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Hi all,
If we have query like select * from {tablename} (Here tablename is the variable) then will the use of prepared staement improve the performance? My guess is use of statement in this case is a better option rather than prepared statement as the tablename may change for every other query.I think are not useful if tablename changes.They are useful only when the where clause has dynamic values.cantor wrote:
Are you sure that your approach is possible? The next example causes exception for me.
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I didn't say that he should solve it in that way. He should create one prepared statement like this "select a, b, c from tablename1" and another prepared statement when he wants to execute "select d, e, f from tablename2"
>
And as I understand, this code will not improve perfomance (and even will not work). As I said it can.
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Kaj -
Can getGeneratedKeys() be used when executing batches of statements?
Hi all,
this question was posted in this thread:
Can getGeneratedKeys() be used when executing batches of statements?
but unfortunately I didn't find the answered appropriate.
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This is a summary of the other thread:
Can you retrieve keys generated by a batch of insert statements? The following code produces an ArrayIndexOutOfBoundsException from the Oracle T4CNumberAccessor.unmarshalOneRow() method (see stack trace at the bottom of this message).
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We have the same problem. No solution so far.
>
I never found a definitive solution but testing seems to show that this is not possible.
There is no code that can be written to get the generated keys if batching is used.
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Thus there could only be one call to 'getGeneratedKeys' since there is only one prepared statement. This strongly implies that it is not possible to use 'getGeneratedKeys' when batching.
See Retrieval of Auto-Generated Keys in the JDBC Dev guide
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Hi,
Is it possible to add results of batch execute of select statements and retrieve the result set ..
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I have given the code below
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ArnoldOlek wrote:
hi
Is there a way do a batch update using prepared statement?
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regards,
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public String count()
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Statement statement = conn.createStatement();
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we can use prepare statement in Co....
import java.sql.PreparedStatement;
import java.sql.ResultSet;
try
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ResultSet rs=prpdStmt1.executeQuery(); //Cursor fetch row
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JOptionPane.showMessageDialog(null,"Record Inserted!", "INSERT",
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}catch(Exception ex){
} ERROR Displayed:
[Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 30. java.sql.SQLExceptionHi cruzdhel,
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I am not familiar with that syntax.
I think it should be like this:
PreparedStatement insertPersons =
conn.prepareStatement("INSERT INTO PERSONS (FIRST_NAME," +
"LAST_NAME," +
"MIDDLE_NAME," +
"NICKNAME," +
"GENDER," +
"MARITALSTATUS," +
"AGE," +
"BIRTHDATE," +
"ADDRESS," +
"RES_PHONE_NUMBER," +
"OFFICE_PHONE_NUMBER," +
"CELL_NUMBER," +
"COMPANY_NAME," +
"EMAIL_ADDRESS," +
"TIMESTAMP)" +
"values (?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
"?," +
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Good Luck,
Avi. -
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pls anyone help me
String query = "select * from order_particulars where order_no=" + orderno + " order by sno"; psmt1 = conEntry.prepareStatement(query, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); rs1 = psmt1.executeQuery(); rs1.last(); intRowCount = rs1.getRow(); particularsdata = new Object[intRowCount][6]; rs1.beforeFirst(); if (intRowCount >= 1) { for (int i = 0; rs1.next(); i++) { particularsdata[0] = i + 1;
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rs1.close();
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Can not use prepared statement
i am using a prepared statement for the following query but the query does not give me an output where as if i use a create statement i am getting my result
can any one say why is it ? or what the problem is
String strQuery = " select lic.lic_id licId, "+ " lic.license_nbr licNo, "+ " lt.display_desc licType "+ " from colamgr.cola_entities ent, "+ " colamgr.cola_licenses lic, "+ " colamgr.cola_lic_types lt, "+ " colamgr.cola_boards boa "+ " where (( 'E'= ? and ent.ent_id = ?) "+ " or ( 'L'= ? and lic.lic_id = ?)) "+ " and lic.ent_id = ent.ent_id "+ " and lic.license_status ='ACTIVE' "+ " and lic.lt_id = lt.lt_id "+ " and boa.boa_id = lt.boa_id "+ " and (( 'E' = ? and (lt.print_ent_addr_ind <> 'N' "+ " or (lt.print_lic_addr_ind <> 'N' and lic.addr1 is null))) "+ " or ( 'L' = ? and lt.print_lic_addr_ind <> 'N')) "+ " UNION "+ " select empl_lic.lic_id licId, "+ " empl_lic.license_nbr licNo, "+ " empl_lt.display_desc licType "+ " from colamgr.cola_entities ent, "+ " colamgr.cola_licenses lic, "+ " colamgr.cola_lic_types lt, "+ " colamgr.cola_lic_xrefs lx, "+ " colamgr.cola_licenses empl_lic, "+ " colamgr.cola_lic_types empl_lt, "+ " colamgr.cola_boards empl_boa "+ " where (( 'E'= ? and ent.ent_id = ?) "+ " or ( and lic.lic_id = ? and 'L'= ? )) "+ " and lic.ent_id = ent.ent_id "+ " and lic.lic_id = lx.lic_id "+ " and lic.license_status ='ACTIVE' "+ " and lx.approval_ind = 'A' "+ " and lx.begin_date is not null "+ " and lx.end_date is null "+ " and lx.lic_id_child = empl_lic.lic_id "+ " and empl_lt.lt_id = empl_lic.lt_id "+ " and empl_boa.boa_id = empl_lt.boa_id "+ " and empl_lic.license_status = 'ACTIVE' "+ " and lic.lt_id = lt.lt_id "+ " and exists (select 1 "+ " from colamgr.cola_lic_types lt1 "+ " where lt1.lt_id = empl_lic.lt_id "+ " and ((lt1.xref1_ind in ('M') "+ " and lt1.xref1_lt_id = lt.lt_id "+ " and (('E'= ? and (lt1.print_xref1_ent_addr_ind <> 'N' "+ " or (lt1.print_xref1_lic_addr_ind <> 'N' and lic.addr1 is null))) "+ " or ( 'L' = ? and lt1.print_xref1_lic_addr_ind <> 'N'))) "+ " or (lt1.xref2_ind in ('M') "+ " and lt1.xref2_lt_id = lt.lt_id "+ " and (('E'= ? and (lt1.print_xref2_ent_addr_ind <> 'N' "+ " or (lt1.print_xref2_lic_addr_ind <> 'N' and lic.addr1 is null))) "+ " or ( 'L' = ? and lt1.print_xref2_lic_addr_ind <> 'N'))) "+ " or (lt1.xref1_ind in ('O') "+ " and (lt1.xref1_lt_id = lt.lt_id or lt1.xref2_lt_id = lt.lt_id) "+ " and (('E'= ? and (lt1.print_xref1_ent_addr_ind <> 'N' "+ " or (lt1.print_xref1_lic_addr_ind <> 'N' and lic.addr1 is null))) "+ " or ('L' = ? and lt1.print_xref1_lic_addr_ind <> 'N'))))) "+ " order by 6 desc, 7 asc ";here is my code which works . when i replace the ? ( where i am checking strAddrtype ='L' using set string it doesn't work . i wanted to know why its not working any help is much appreciated.
thanks .
public ArrayList getReprintLicenses(String strEntId, String strLicId, String strAddrType)
ArrayList alMasterLicList = new ArrayList();
String strQuery = " select lic.lic_id licId, "+
" lic.license_nbr licNo, "+
" lt.display_desc licType, "+
" colamgr.COLA_CHK_RENEW_STAT(lic.lic_id) renewStatus, "+
" 0, "+
" SUBSTR(lic.License_nbr,1,4), "+
" SUBSTR(lic.License_nbr,5) "+
" from cola_entities ent, "+
" cola_licenses lic, "+
" cola_lic_types lt, "+
" cola_boards boa "+
" where ((?= 'E' and ent.ent_id = ? ) "+
" or ("+strAddrType+" = 'L' and lic.lic_id = ?)) "+
" and lic.ent_id = ent.ent_id "+
" and lic.license_status ='ACTIVE' "+
" and lic.lt_id = lt.lt_id "+
" and boa.boa_id = lt.boa_id "+
" and ((?= 'E' and (lt.print_ent_addr_ind <> 'N' "+
" or (lt.print_lic_addr_ind <> 'N' and lic.addr1 is null))) "+
" or ("+strAddrType+" = 'L' and lt.print_lic_addr_ind <> 'N')) "+
" UNION "+
" select empl_lic.lic_id licId, "+
" empl_lic.license_nbr licNo, "+
" empl_lt.display_desc licType, "+
" COLA_CHK_RENEW_STAT(empl_lic.lic_id) renewStatus, "+
" 1, "+
" SUBSTR(lic.License_nbr,1,4), "+
" SUBSTR(lic.License_nbr,5) "+
" from cola_entities ent, "+
" cola_licenses lic, "+
" cola_lic_types lt, "+
" cola_lic_xrefs lx, "+
" cola_licenses empl_lic, "+
" cola_lic_types empl_lt, "+
" cola_boards empl_boa "+
" where ((? = 'E' and ent.ent_id =?) "+
" or ("+strAddrType+" = 'L' and lic.lic_id =?)) "+
" and lic.ent_id = ent.ent_id "+
" and lic.lic_id = lx.lic_id "+
" and lic.license_status ='ACTIVE' "+
" and lx.approval_ind = 'A' "+
" and lx.begin_date is not null "+
" and lx.end_date is null "+
" and lx.lic_id_child = empl_lic.lic_id "+
" and empl_lt.lt_id = empl_lic.lt_id "+
" and empl_boa.boa_id = empl_lt.boa_id "+
" and empl_lic.license_status = 'ACTIVE' "+
" and lic.lt_id = lt.lt_id "+
" and exists (select 1 "+
" from cola_lic_types lt1 "+
" where lt1.lt_id = empl_lic.lt_id "+
" and ((lt1.xref1_ind in ('M') "+
" and lt1.xref1_lt_id = lt.lt_id "+
" and ((? = 'E' and (lt1.print_xref1_ent_addr_ind <> 'N' "+
" or (lt1.print_xref1_lic_addr_ind <> 'N' and lic.addr1 is null))) "+
" or (?= 'L' and lt1.print_xref1_lic_addr_ind <> 'N'))) "+
" or (lt1.xref2_ind in ('M') "+
" and lt1.xref2_lt_id = lt.lt_id "+
" and ((?= 'E' and (lt1.print_xref2_ent_addr_ind <> 'N' "+
" or (lt1.print_xref2_lic_addr_ind <> 'N' and lic.addr1 is null))) "+
" or (? = 'L' and lt1.print_xref2_lic_addr_ind <> 'N'))) "+
" or (lt1.xref1_ind in ('O') "+
" and (lt1.xref1_lt_id = lt.lt_id or lt1.xref2_lt_id = lt.lt_id) "+
" and ((? = 'E' and (lt1.print_xref1_ent_addr_ind <> 'N' "+
" or (lt1.print_xref1_lic_addr_ind <> 'N' and lic.addr1 is null))) "+
" or (? = 'L' and lt1.print_xref1_lic_addr_ind <> 'N'))))) "+
" order by 6 desc, 7 asc ";
try
con = getDSconn();
// stmt = con.createStatement();
pstmt=con.prepareStatement(strQuery);
// rs = stmt.executeQuery(strQuery);
pstmt.setString(1,strAddrtype);
pstmt.setString(2,strEntId);
pstmt.setString(3,strLicId);
pstmt.setString(4,strAddrtype);
pstmt.setString(5,strAddrtype);
pstmt.setString(6,strEntId);
pstmt.setString(7,strLicId);
pstmt.setString(8,strAddrtype);
pstmt.setString(9,strAddrtype);
pstmt.setString(10,strAddrtype);
pstmt.setString(11,strAddrtype);
pstmt.setString(12,strAddrtype);
pstmt.setString(13,strAddrtype);
rs=pstmt.executeQuery();
while (rs.next())
LicenseeForm licenseInfo = new LicenseeForm();
licenseInfo.setLicId(rs.getString(1));
licenseInfo.setLicNo(rs.getString(2));
licenseInfo.setLicType(rs.getString(3));
//licenseInfo.setBoard(rs.getString(4));
licenseInfo.setRenewStatus(rs.getString(4));
alMasterLicList.add(licenseInfo);
rs.close();
pstmt.close();
con.close();
con = null;
catch (RuntimeException re)
throw re;
catch(Exception e)
{ e.printStackTrace();
try
rs.close();
pstmt.close();
con.close();
con = null;
catch(Exception i){}
finally
try
pstmt.close();
con.close();
con = null;
catch(Exception i){}
return alMasterLicList;
-
Does a Database Control use Prepared Statements?
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RobRob,
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Prepared Statements are disabled
In our production server something went wrong and one of our Read Queries started erroring. A DatabaseException was thrown and we log the "getQuery.getSQLString()" statement. We found this query in the logs:
SELECT t1.ID, t1.NAME, t1.DESCRIPTION, t1.EXTREFID, t1.STYLESHEET, t1.DDSVNVERSION, t1.FIRSTNAME, t1.LASTNAME, t1.EMAILADDR, t1.PHONENUMBER, t1.ADDRESS, t1.ADDRESS2, t1.CITY, t1.STATE, t1.POSTALCODE, t1.COUNTRY, t1.ADMINACCTNAME, t1.HASDOCUMENTS, t1.HASTIMEDNOTIFICATIONS, t1.STATUS, t1.ENTRYDATE, t1.EVALEXPDATE, t1.LASTREMINDDATE, t1.FULLUSERS, t1.LIMUSERS, t1.REQUSERS, t1.ISENTERPRISE, t1.EXPDATE, t1.ISDISABLED, t1.DISABLEDDATE, t1.NEEDLICENSEAGREEMENT, t1.ISWARNINGDISABLED, t1.LOCALE, t1.TIMEZONE, t1.CURRENCY, t1.DOMAIN, t1.DOCUMENTSIZE, t1.EXTRADOCUMENTSTORAGE, t1.ONDEMANDOPTIONS, t1.SSOTYPE, t1.RESELLERID, t1.ACCOUNTREPID, t1.LASTUSAGEREPORTDATE, t1.NEXTUSAGEREPORTDATE, t1.USAGEREPORTATTEMPTS FROM T_SSOOPTIONS t0, T_CUSTOMERS t1 WHERE *((((t0.SSOENABLED = ?) AND (t1.SSOTYPE IN (?, ?))) AND (UPPER(t1.DOMAIN) = ?)) AND (t0.CUSTOMERID = t1.ID))*
Notice the values weren't entered into the where clause. We had to bounce the application to fix the problem. I've never seen this before. I've added more debugging statements to the code - so if this happens again in the future I'll have more information to report on. In the mean time I'm wondering if anyone else has every seen a problem of this nature.Database error due to invalid SQL statement.
I don't have a stack, we were catching the exception and not printing the stack :(
Like I mentioned in my first post, I added more debugging code (e.printStackTrace()). I understand this is hard to track down without more information. I was just hoping you guys had seen something like this before and had any insight. Like I mentioned before: this is on our production server. I've never seen this type of error before. That particular server (we run in a cluster mode) had been up for several days and then started generating that error. IT bounced the node and everything went back to normal. We have been using toplink for about 5 years now and have never seen this problem, until August 3rd 2009. The only thing that has changed recently is our migration from toplink 10 to EclipseLink. I was wondering if anyone knows if anything had changed in EclipseLink/toplink 11 with the generation of SQL queries.
I'll keep looking. There is more debugging code in there now. Since the error was "Database error due to invalid SQL statement" this implies the SQL was generated, exited that part of the code and was sent to the db where it failed. I'm afraid the printStackTrace won't help if this error happens again. -
SQL query slow when issued by app, fast when issued mnaually
Hi there,
I have a more general question about a specific Oracle behaviour.
I update a feature from within an application. The application doesn't respond and I finally have to terminate it. I checked Oracle whether a query is running long using the following statement:
select s.username,s.sid,s.serial#,s.last_call_et/60 mins_running,q.sql_text from v$session s
join v$sqltext_with_newlines q
on s.sql_address = q.address
where status='ACTIVE'
and type <>'BACKGROUND'
and last_call_et> 60
order by sid,serial#,q.piece
The result of the above query is:
WITH CONNECTION AS ( SELECT * FROM WW_CONN C WHERE (C.FID_FROM I
N (SELECT FID FROM WW_LINE WHERE FID_ATTR=:B1 ) AND C.F_CLASS_ID
FROM =22) OR (C.FIDTO IN (SELECT FID FROM WW_LINE WHERE FID_AT
TR=:B1 ) AND C.F_CLASS_ID_TO =22) ) SELECT MIN(P.FID_ATTR) AS FI
D_FROM FROM CONNECTION C, WW_POINT P WHERE (P.FID = C.FID_FROM A
ND C.F_CLASS_ID_FROM = 32 AND C.FLOW = 1) OR (P.FID = C.FID_TO A
ND C.F_CLASS_ID_TO = 32 AND C.FLOW = 2)
I have a different tool which shows me the binding parameter values. So I know that the value for :B1 is 5011 - the id of the feature being updated. This query runs for 20 mins and longer before it eventually stops. The update process involves multiple sql statements - so this one is not doing the update but is part of the process.
Here is the bit I do not understand: when I run the query in SQL Developer with value 5011 for :B1 it takes 0.5 secs to return a result.
Why is it, that the sql statement takes so long when issued by the application but takes less than a second when I run it manually?
I sent a dump of the data to the application vendor who is not able to reproduce the issue in their environment. Could someone explain to me what happens here or give me some keywords for further research?
We are using 11gR2, 64bit.
Many thanks,
RobHi Rob,
at least you should see some differences in the statistics for the different child cursor (the one for the execution in the application should show at least a higher value for ELAPSED_TIME). I would use something like the following query to check the information for the child cursors:
select sql_id
, PLAN_HASH_VALUE
, CHILD_NUMBER
, EXECUTIONS
, ELAPSED_TIME
, USER_IO_WAIT_TIME
, CONCURRENCY_WAIT_TIME
, DISK_READS
, BUFFER_GETS
, ROWS_PROCESSED
from v$sql
where sql_id = your_sql_idRegards
Martin
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