Dynamic SQL within a SQL Query ?
is there any possibility to do like this ?
SELECT table_name, XXXXXXXX('SELECT Count(*) FROM '||table_name) tot_rows
FROM dba_tables
WHERE owner = 'SCOTT';or any other trick to run dynamic SQL within the SQL Query?
Hoping....that it should be.
Regards,
Orapdev
One small disadvantage: it is executing 202 SQL statements: 3 "user SQL statements" (the one above and the 2 "select count(*)..."), and 199 internal ones ...How did you get to those numbers?
I just traced this statement and found completely different results:
TKPROF: Release 10.2.0.3.0 - Production on Tue Jul 10 12:12:10 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Trace file: diesl10r2_ora_5440.trc
Sort options: default
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
declare cursor NlsParamsCursor is SELECT * FROM
nls_session_parameters;begin SELECT Nvl(Lengthb(Chr(65536)),
Nvl(Lengthb(Chr(256)), 1)) INTO :CharLength FROM dual; for NlsRecord in
NlsParamsCursor loop if NlsRecord.parameter = 'NLS_DATE_LANGUAGE' then
:NlsDateLanguage := NlsRecord.value; elsif NlsRecord.parameter =
'NLS_DATE_FORMAT' then :NlsDateFormat := NlsRecord.value; elsif
NlsRecord.parameter = 'NLS_NUMERIC_CHARACTERS' then
:NlsNumericCharacters := NlsRecord.value; elsif NlsRecord.parameter =
'NLS_TIMESTAMP_FORMAT' then :NlsTimeStampFormat := NlsRecord.value;
elsif NlsRecord.parameter = 'NLS_TIMESTAMP_TZ_FORMAT' then
:NlsTimeStampTZFormat := NlsRecord.value; end if; end loop;end;
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 1
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
SELECT NVL(LENGTHB(CHR(65536)), NVL(LENGTHB(CHR(256)), 1))
FROM
DUAL
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.01 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 1
total 3 0.01 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
Rows Row Source Operation
1 FAST DUAL (cr=0 pr=0 pw=0 time=7 us)
SELECT *
FROM
NLS_SESSION_PARAMETERS
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 17
total 3 0.00 0.00 0 0 0 17
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
Rows Row Source Operation
17 FIXED TABLE FULL X$NLS_PARAMETERS (cr=0 pr=0 pw=0 time=124 us)
select PARAMETER,VALUE
from
nls_session_parameters where PARAMETER in('NLS_NUMERIC_CHARACTERS',
'NLS_DATE_FORMAT','NLS_CURRENCY')
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 3
total 3 0.00 0.00 0 0 0 3
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
Rows Row Source Operation
3 FIXED TABLE FULL X$NLS_PARAMETERS (cr=0 pr=0 pw=0 time=57 us)
select to_char(9,'9C')
from
dual
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 0 0 1
total 3 0.00 0.00 0 0 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
Rows Row Source Operation
1 FAST DUAL (cr=0 pr=0 pw=0 time=2 us)
SELECT table_name,
DBMS_XMLGEN.getxmltype ('select count(*) c from ' || table_name).EXTRACT
('//text').getstringval
() tot
FROM dba_tables
WHERE table_name IN ('EMP', 'DEPT') AND owner = 'SCOTT'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.01 0.02 0 48 0 2
total 3 0.01 0.02 0 48 0 2
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50
Rows Row Source Operation
2 HASH JOIN (cr=42 pr=0 pw=0 time=2952 us)
2 MERGE JOIN CARTESIAN (cr=42 pr=0 pw=0 time=1206 us)
2 NESTED LOOPS OUTER (cr=42 pr=0 pw=0 time=478 us)
2 NESTED LOOPS OUTER (cr=36 pr=0 pw=0 time=421 us)
2 NESTED LOOPS OUTER (cr=30 pr=0 pw=0 time=379 us)
2 NESTED LOOPS OUTER (cr=30 pr=0 pw=0 time=365 us)
2 NESTED LOOPS (cr=22 pr=0 pw=0 time=312 us)
2 NESTED LOOPS (cr=16 pr=0 pw=0 time=272 us)
2 NESTED LOOPS (cr=8 pr=0 pw=0 time=172 us)
1 TABLE ACCESS BY INDEX ROWID USER$ (cr=2 pr=0 pw=0 time=56 us)
1 INDEX UNIQUE SCAN I_USER1 (cr=1 pr=0 pw=0 time=30 us)(object id 44)
2 INLIST ITERATOR (cr=6 pr=0 pw=0 time=111 us)
2 TABLE ACCESS BY INDEX ROWID OBJ$ (cr=6 pr=0 pw=0 time=87 us)
2 INDEX RANGE SCAN I_OBJ2 (cr=4 pr=0 pw=0 time=54 us)(object id 37)
2 TABLE ACCESS CLUSTER TAB$ (cr=8 pr=0 pw=0 time=98 us)
2 INDEX UNIQUE SCAN I_OBJ# (cr=4 pr=0 pw=0 time=26 us)(object id 3)
2 TABLE ACCESS CLUSTER TS$ (cr=6 pr=0 pw=0 time=39 us)
2 INDEX UNIQUE SCAN I_TS# (cr=2 pr=0 pw=0 time=13 us)(object id 7)
2 TABLE ACCESS CLUSTER SEG$ (cr=8 pr=0 pw=0 time=37 us)
2 INDEX UNIQUE SCAN I_FILE#_BLOCK# (cr=4 pr=0 pw=0 time=21 us)(object id 9)
0 INDEX UNIQUE SCAN I_OBJ1 (cr=0 pr=0 pw=0 time=4 us)(object id 36)
2 TABLE ACCESS BY INDEX ROWID OBJ$ (cr=6 pr=0 pw=0 time=33 us)
2 INDEX UNIQUE SCAN I_OBJ1 (cr=4 pr=0 pw=0 time=23 us)(object id 36)
2 TABLE ACCESS CLUSTER USER$ (cr=6 pr=0 pw=0 time=28 us)
2 INDEX UNIQUE SCAN I_USER# (cr=2 pr=0 pw=0 time=12 us)(object id 11)
2 BUFFER SORT (cr=0 pr=0 pw=0 time=716 us)
1 FIXED TABLE FULL X$KSPPI (cr=0 pr=0 pw=0 time=661 us)
1436 FIXED TABLE FULL X$KSPPCV (cr=0 pr=0 pw=0 time=1449 us)
select count(*) c
from
EMP
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 1 0 1
total 4 0.00 0.00 0 1 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
Rows Row Source Operation
1 SORT AGGREGATE (cr=1 pr=0 pw=0 time=96 us)
14 INDEX FULL SCAN EMP_IDX (cr=1 pr=0 pw=0 time=46 us)(object id 61191)
select metadata
from
kopm$ where name='DB_FDO'
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.00 0 2 0 1
total 3 0.00 0.00 0 2 0 1
Misses in library cache during parse: 0
Optimizer mode: CHOOSE
Parsing user id: SYS (recursive depth: 1)
Rows Row Source Operation
1 TABLE ACCESS BY INDEX ROWID KOPM$ (cr=2 pr=0 pw=0 time=42 us)
1 INDEX UNIQUE SCAN I_KOPM1 (cr=1 pr=0 pw=0 time=22 us)(object id 365)
select count(*) c
from
DEPT
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 1 0 1
total 4 0.00 0.00 0 1 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 50 (recursive depth: 1)
ALTER SESSION SET sql_trace=FALSE
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.00 0 0 0 0
Misses in library cache during parse: 0
Parsing user id: 50
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 5 0.00 0.00 0 0 0 0
Execute 5 0.00 0.00 0 0 0 1
Fetch 3 0.01 0.02 0 48 0 6
total 13 0.01 0.03 0 48 0 7
Misses in library cache during parse: 0
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 5 0.00 0.00 0 0 0 0
Execute 5 0.01 0.00 0 0 0 0
Fetch 7 0.00 0.00 0 4 0 21
total 17 0.01 0.00 0 4 0 21
Misses in library cache during parse: 0
9 user SQL statements in session.
1 internal SQL statements in session.
10 SQL statements in session.
Trace file: diesl10r2_ora_5440.trc
Trace file compatibility: 10.01.00
Sort options: default
1 session in tracefile.
9 user SQL statements in trace file.
1 internal SQL statements in trace file.
10 SQL statements in trace file.
10 unique SQL statements in trace file.
132 lines in trace file.
0 elapsed seconds in trace file.I only see a ratio of 1:9 for user- to internal SQL statements?
michaels> select * from v$version
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE 10.2.0.3.0 Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
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begin
if (:JOB_CODE IS NOT NULL and :MIN_EXP IS NOT NULL and :MAX_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql:= 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = :JOB_CODE and v_experience_years >= :MIN_EXP and v_experience_years <= :MAX_EXP and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
elsif (:JOB_CODE IS NULL and :MIN_EXP IS NOT NULL and :MAX_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql := 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where v_experience_years >= :MIN_EXP and v_experience_years <= :MAX_EXP and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
elsif (:MIN_EXP IS NULL and :JOB_CODE IS NOT NULL and :MAX_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql := 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where v_experience_years <= :MAX_EXP and V_REQUIREMENT = :JOB_CODE and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
elsif (:MAX_EXP is null and :JOB_CODE IS NOT NULL and :MIN_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql := 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = :JOB_CODE and v_experience_years >= :MIN_EXP and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
end if;
insert into query_list values (v_sql);
insert into debug values (:JOB_CODE , :MIN_EXP , :MAX_EXP , :SOURCES1);
return v_sql;
end;
Please not that I am insertin the query into a table called Query_list and the page item values into the table called Debug thru the pl/sql function which returns teh query.
Now I select the data from the debug tables.
select unique(query) from query_list;
select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = :JOB_CODE and v_experience_years >= :MIN_EXP and v_experience_years <= :MAX_EXP and source like '%:SOURCES1%'
select * from debug;
JOBCODE MINEX MAXEX SOURCE
21 1 10 donkeyHire
And if I run the query in sql I get some records returned
select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = 21 and v_experience_years >= 1 and v_experience_years <= and source like 'donkeyHire'
V_CANDIDATE_ID V_FNAME V_CURRENT_EMPLOYER V_EXPERIENCE_YEARS
2 Vengu Andale Tech 4
But the record does not show up in the report!
does this type of report parse page items as text?
Why is it so?
Waiting for an early reply.
Thanks,
venkatVenkat - You don't want to put ':SOURCES1' in quotes like that.
Scott -
Sending email using PL/SQL based on a query result
Hello all,
I want to create a procedure using PL/SQL, based on a query result.Here is the scenario:
I have multiple tables in Target and Source databases that I want to compare(not the whole table but queries on these tables) and if they differ, I want to shoot an email. I have some ideas how to implement this but not sure whether it is the best approach.
select Acct_id, total from SourceTableA
minus
select Acct_id, total from TargetTableA
select Acct_id, sum from SourceTableB
minus
select Acct_id, sum from TargetTableB
If the result of any of above queries > 0 then I want to shoot an email and want to repeat this procedure in the morning every day.
I know how to implement send_mail procedure using UTL_SMTP package and how to schedule tha job by dbms_job package. But I am not sure how to implement the result of minus query. In case if minus > 0 then I also want to send the name of tables in the email message where source and target tables are not same. Should i use cursor, variable or insert the result in a new table? any help would be highly appreciated. Thanks in advance.
KhanActually these queries are the part of our daily testing that we run everyday manually(after the scheduled ETL load) to see if there are any discrepencies between our datawarehouse tables and source tables. So instead of running these queries manually everyday we want to schedula a procedure that will shoot an email in case of any discrepency and indicate which tables have problems.
-
Issue with running PL/SQL function returning Sql query
hi, I am trying to create a report region by using the option of PL/SQL function returning sql query.
I notice that it's very slow for the report region page to show up. In my PL/SQL function body, there are only 3 steps, first update all the 10 rows of varchar2 fields to null,then insert values to those fields, then select all from the table to show report results. It takes more than 5 minitues for the page to load up, how ever, if i run those steps in SQL*Plus, it only takes a couple of seconds to finish. Any suggestions?
Thanks,
ginaSergio, the codes are as followed,
Declare
q varchar2(32767); -- query
Begin
q := 'select "ID",'||
'"ENTRY NAME","TOTAL","#CM","%CM","#CA",'||
'"%CA", from Info_table';
update info_table
set "TOTAL" = '',
"#CM" = '',
"%CM" = '',
"#CA" ='',
"%CA"=''
where "ID"<=10;
// set all data in column Total to null,there is only 10 rows in the table
update info_Table set Total = vTotal,
"#CM" = vCM
(those variables hold user key-in Text filed value)
where ID = 1;
return q;
End; -
SQL query (pl/sql function body returning query) performance issue
I create my report in building my sql instruction with ( SQL Query pl/sql function body returning sql query );
My report take more than 20 seconds however if i did a cut and paste with the sql code in TOAD the same sql take 1 second.
To try to discover the source of the problem; i take the sql generated by the function and i create another report ( sql query ) this new report take 2 seconds.
My query is very big 25,000 characters with database link.
What is the difference between SQL-quey and sql-query(pl/sql function body returning sql query)
Thanks
MarcMarc,
Firstly...don't compare the timings from Toad, since often Toad only fetches the first few records for you (i.e. it pages them).
Secondly....the database link could be a factor here, but without seeing your query it's too hard to say.
Can you post the query somewhere (on a webserver say)?
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