Database adapter and column aliases in the select statement (10.1.3.1)

Hi,
Is it possible to use column aliases in the select statement for a database adapter to return an xml element name which is different to the column in the queried table?
I have tried using
SELECT EMPLOYEE_ID, FIRST_NAME AS MYNAME, LAST_NAME, SALARY, DEPARTMENT_ID, PHONE_NUMBER, EMAIL, HIRE_DATE FROM HR.EMPLOYEES WHERE (DEPARTMENT_ID = #DEPT_ID)
but I get the following XML fragment returned
<Employees>
<employeeId>100</employeeId>
<firstName xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<lastName>King</lastName>
<salary>24000</salary>
Any pointers appreciated.
Joel.

That is really interesting.
When I use the "custom sql" option in the DB adapter wizard, it used the aliases just fine in the return schema.
Marc

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Run time Column Name in the Select Statement

Hi there,
I face problem while writing sql statment for report in the Oracle reports.
The prom is I want to bound the where clause column name with the value stored in a variable e.g.
Select * from emp
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where the variable Column_Name have different values at different times, e.g.
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Hi,
U can use lexical parameters for the solutions.U must be aware of it, but still i describe how to work it out.
1)In your datamodel in object navigator create a parameter under User parameter node.Name the parameter, for eg. p_clause.
set data type of parameter to character.
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select * from emp &p_clause; --(THIS IS THE PARAMETER WE CREATED ABOVE)
3)Now run your report
Now in your parameter form pass the value for p_clause parameter.
eg: where name='JACK';
or
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or where deptno=10;
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navneet jain
[email protected]

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Hello ABAP,
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Hi florian,
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/u01/app/oracle/product/10.2.0/db_1/OPatch
[oracle@rac1 OPatch]$ export ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1
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Invoking OPatch 10.2.0.1.0
Oracle interim Patch Installer version 10.2.0.1.0
Copyright (c) 2005, Oracle Corporation. All rights reserved..
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Issue with Past Month data in the Select Statement

Hi,
I written the following query,
SELECT   /*+NO_MERGE(A)*/
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Thanks
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WHERE snap_shot_date BETWEEN ADD_MONTHS(TRUNC(a.max_date, 'MM'), -11) AND a.max_date
....

How to test the select statement.

Hi All,
How to test the select statement.
Is there any Oracle sqlplus or toad kind of tool to test the query.
thanks
siva

Use SQL Trace (ST05) and choose 'Explain one SQL Request'. Enter your SQL command as it should be executed in the underlying database. e.g. if the db is Oracle, the statement should be entered as:
SELECT matnr,werks,lvorm,dispo
FROM marc
WHERE mandt = :a AND
matnr = :b AND
werks = :c
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Regards
Suresh Radhakrishnan

Using column number inplace of column name in SQL Select statement

Is there a way to run sql select statements with column numbers in
place of column names?
Current SQL
select AddressId,Name,City from AddressIs this possible
select 1,2,5 from AddressThanks in Advance

user10962462 wrote:
well, ok, it's not possible with SQL, but how about PL/SQL?As mentioned, using DBMS_SQL you can only really use positional notation... and you can also use those positions to get the other information such as what the column is called, what it's datatype is etc.
CREATE OR REPLACE PROCEDURE run_query(p_sql IN VARCHAR2) IS
v_v_val     VARCHAR2(4000);
v_n_val     NUMBER;
v_d_val     DATE;
v_ret       NUMBER;
c           NUMBER;
d           NUMBER;
col_cnt     INTEGER;
f           BOOLEAN;
rec_tab     DBMS_SQL.DESC_TAB;
col_num     NUMBER;
v_rowcount NUMBER := 0;
BEGIN
-- create a cursor
c := DBMS_SQL.OPEN_CURSOR;
-- parse the SQL statement into the cursor
DBMS_SQL.PARSE(c, p_sql, DBMS_SQL.NATIVE);
-- execute the cursor
d := DBMS_SQL.EXECUTE(c);
-- Describe the columns returned by the SQL statement
DBMS_SQL.DESCRIBE_COLUMNS(c, col_cnt, rec_tab);
-- Bind local return variables to the various columns based on their types
FOR j in 1..col_cnt
LOOP
    CASE rec_tab(j).col_type
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      WHEN 2 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_n_val);      -- Number
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      DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000); -- Any other type return as varchar2
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END LOOP;
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DBMS_OUTPUT.PUT_LINE('-- Columns --');
FOR j in 1..col_cnt
LOOP
    DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' - '||case rec_tab(j).col_type when 1 then 'VARCHAR2'
                                                                              when 2 then 'NUMBER'
                                                                              when 12 then 'DATE'
                                                     else 'Other' end);
END LOOP;
DBMS_OUTPUT.PUT_LINE('-------------');
-- This part outputs the DATA
LOOP
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    v_ret := DBMS_SQL.FETCH_ROWS(c);
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    EXIT WHEN v_ret = 0;
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      CASE rec_tab(j).col_type
        WHEN 1 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_v_val);
                     DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' : '||v_v_val);
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                     DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' : '||v_n_val);
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DBMS_SQL.CLOSE_CURSOR(c);
END;
SQL> exec run_query('select empno, ename, deptno, sal from emp where deptno = 10');
-- Columns --
EMPNO - NUMBER
ENAME - VARCHAR2
DEPTNO - NUMBER
SAL - NUMBER
Row: 1
EMPNO : 7782
ENAME : CLARK
DEPTNO : 10
SAL : 2450
Row: 2
EMPNO : 7839
ENAME : KING
DEPTNO : 10
SAL : 5000
Row: 3
EMPNO : 7934
ENAME : MILLER
DEPTNO : 10
SAL : 1300
PL/SQL procedure successfully completed.
SQL> exec run_query('select * from emp where deptno = 10');
-- Columns --
EMPNO - NUMBER
ENAME - VARCHAR2
JOB - VARCHAR2
MGR - NUMBER
HIREDATE - DATE
SAL - NUMBER
COMM - NUMBER
DEPTNO - NUMBER
Row: 1
EMPNO : 7782
ENAME : CLARK
JOB : MANAGER
MGR : 7839
HIREDATE : 09/06/1981 00:00:00
SAL : 2450
COMM :
DEPTNO : 10
Row: 2
EMPNO : 7839
ENAME : KING
JOB : PRESIDENT
MGR :
HIREDATE : 17/11/1981 00:00:00
SAL : 5000
COMM :
DEPTNO : 10
Row: 3
EMPNO : 7934
ENAME : MILLER
JOB : CLERK
MGR : 7782
HIREDATE : 23/01/1982 00:00:00
SAL : 1300
COMM :
DEPTNO : 10
PL/SQL procedure successfully completed.
SQL> exec run_query('select * from dept where deptno = 10');
-- Columns --
DEPTNO - NUMBER
DNAME - VARCHAR2
LOC - VARCHAR2
Row: 1
DEPTNO : 10
DNAME : ACCOUNTING
LOC : NEW YORK
PL/SQL procedure successfully completed.
SQL>

How to find the select statement has written all selected values into text

Hi,
I am using form6i. i am selecting a set of values from database tables based upon some user parameters and writing into the text file using Text_io.put_line . In this case how we can make sure that the text fille contains all the data what we are selected from selected statement. somebody told that there might be chances of aborting of data while writing into the text file. is there any way to fild out the selected statements has written all the selected fields and corresponding output into the .txt file.
Please suggest me.

somebody told that there might be chances of aborting of data while writing into the text fileWhat kind of "chance" does that somebody refer to?
If you want to verify if the number of records (lines) in the file matches the number of records from the cursor, you could re-open the written file in read-mode and count the number of lines by reading one by one, then compare the number of lines with the number of records from the cursor.

Calling an SP takes over 200% more time over the select statement

As part of my POC converting a SQL Server application over to SAP HANA, I'm find that CALL is taking over 200% more time than calling the SELECT statement directly. The result is that the application that uses ODBC against HANA with CALL statements is taking much more time than SQL Server. I'm finding this for all stored procedure calls in the application. Here is an example:
CREATE PROCEDURE dbo.usp_GetOrdersByCustomerID
(IN C_ID bigint)
LANGUAGE SQLSCRIPT DEFAULT SCHEMA "DBO" READS SQL DATA
AS BEGIN
SELECT TOP 20
   C_F_NAME,
            C_L_NAME,
            C_EMAIL,
            O_ID,
            O_TOTAL,
            O_DTS,
            O_FM_DTS
FROM    dbo.Customer JOIN dbo.Orders ON C_ID = O_C_ID
WHERE   C_ID = :C_ID
    ORDER   BY O_ID DESC;
END;
When using the following CALL statement in SAP HANA Studio
CALL dbo.usp_GetOrdersByCustomerID(3429);
I get execution times that look like this:
Statement 'CALL dbo.usp_GetOrdersByCustomerID(3429)'
successfully executed in 9 ms 663 µs (server processing time: 8 ms 115 µs)
Fetched 5 row(s) in 0 ms 69 µs (server processing time: 0 ms 0 µs)
Statement 'CALL dbo.usp_GetOrdersByCustomerID(3429)'
successfully executed in 11 ms 851 µs (server processing time: 8 ms 238 µs)
Fetched 5 row(s) in 0 ms 62 µs (server processing time: 0 ms 0 µs)
Statement 'CALL dbo.usp_GetOrdersByCustomerID(3429)'
successfully executed in 8 ms 522 µs (server processing time: 6 ms 892 µs)
Fetched 5 row(s) in 0 ms 93 µs (server processing time: 0 ms 0 µs)
When I execute the select statement with the hard coded parameter value, I get much faster results:
Statement 'SELECT TOP 20 C_F_NAME, C_L_NAME, C_EMAIL, O_ID, O_TOTAL, O_DTS, O_FM_DTS FROM dbo.Customer JOIN ...'
successfully executed in 4 ms 430 µs (server processing time: 2 ms 424 µs)
Fetched 5 row(s) in 0 ms 73 µs (server processing time: 0 ms 0 µs)
Statement 'SELECT TOP 20 C_F_NAME, C_L_NAME, C_EMAIL, O_ID, O_TOTAL, O_DTS, O_FM_DTS FROM dbo.Customer JOIN ...'
successfully executed in 4 ms 105 µs (server processing time: 2 ms 210 µs)
Fetched 5 row(s) in 0 ms 69 µs (server processing time: 0 ms 0 µs)
Statement 'SELECT TOP 20 C_F_NAME, C_L_NAME, C_EMAIL, O_ID, O_TOTAL, O_DTS, O_FM_DTS FROM dbo.Customer JOIN ...'
successfully executed in 4 ms 694 µs (server processing time: 2 ms 810 µs)
Fetched 5 row(s) in 0 ms 60 µs (server processing time: 0 ms 0 µs)
I have 500,000 rows in the Customers table and 2,500,000 rows in the Orders table. The tables are COLUMN tables.
Is there an optimization that I'm missing?
Regards,
Bill

Hi Bill,
Can you please try something:
tab_cust =
SELECT
   C_F_NAME,
            C_L_NAME,
            C_EMAIL
FROM    dbo.Customer
WHERE   C_ID = :C_ID;
tab_orders =
SELECT
            O_ID,
            O_TOTAL,
            O_DTS,
            O_FM_DTS
FROM    dbo.Orders ON C_ID = O_C_ID
WHERE   O_C_ID = :C_ID
SELECT TOP 20
   C_F_NAME,
            C_L_NAME,
            C_EMAIL,
            O_ID,
            O_TOTAL,
            O_DTS,
            O_FM_DTS
FROM    :tab_cust JOIN :tab_orders ON C_ID = O_C_ID
    ORDER   BY O_ID DESC;
END;
Expected behavior: The data set for each of the tables is filtered out and then joined. Although the filter is expected to be pushed to each of the joined tables even in your case, but this is worth the try.
Regards,
Ravi

Can call a function in the select statement?

Is there any ways to call a function in the select statement?
what I like to do is this:
select deptno, totalEmployees(deptno), TotalSalary(deptno)
from emp;
I know it can be done by count(*) and join tables, but my case
is much more complex and the where clauses are different from
one function to another, and have many tables to join and many
combinations
Thanks

Functions can be used in a select statement subject to certain
restrictions, see
http://otn.oracle.com/docs/products/oracle8i/doc_library/817_doc/
server.817/a85397/statem9b.htm#2062024
It's under "CREATE FUNCTION> Keywords and Parameters> function>
Restrictions on User-Defined Functions"
Here is an except...
When a function is called from within a query or DML statement,
the function cannot:
a) Have OUT or IN OUT parameters
b) Commit or roll back the current transaction, create or roll
back to a savepoint, or alter the session or the system. DDL
statements implicitly commit the current transaction, so a user-
defined function cannot execute any DDL statements.
c) Write to the database, if the function is being called from a
SELECT statement. However, a function called from a subquery in
a DML statement can write to the database.
d) Write to the same table that is being modified by the
statement from which the function is called, if the function is
called from a DML statement.
Except for the restriction on OUT and IN OUT parameters, Oracle
enforces these restrictions not only for the function called
directly from the SQL statement, but also for any functions that
function calls, and on any functions called from the SQL
statements executed by that function or any function it calls.

Joins And For all Enteries in Select Statement

Could you please tell me when there is a high amount of data which is being handled in the table, does the use of INNER JOINS and FOR ALL ENTERIES in SELECT Statement decreases the system performance? ?
Can you also let me know where can i get some tips regarding do's and dont's for ABAP Programming, I want to increase my system performance.
Currently the programs which are being used are taking a lot of time for execution...
Its very URGENT!

Hai Jyotsna
Go through the following Tips for improving Performence
For all entries
The for all entries creates a where clause, where all the entries in the driver table are combined with OR. If the number of entries in the driver table is larger than rsdb/max_blocking_factor, several similar SQL statements are executed to limit the length of the WHERE clause.
The plus
Large amount of data
Mixing processing and reading of data
Fast internal reprocessing of data
Fast
The Minus
Difficult to program/understand
Memory could be critical (use FREE or PACKAGE size)
Some steps that might make FOR ALL ENTRIES more efficient:
Removing duplicates from the driver table
Sorting the driver table
If possible, convert the data in the driver table to ranges so a BETWEEN statement is used instead of and OR statement:
               FOR ALL ENTRIES IN i_tab
                  WHERE mykey >= i_tab-low and
             mykey <= i_tab-high.
Nested selects
The plus:
Small amount of data
Mixing processing and reading of data
Easy to code - and understand
The minus:
Large amount of data
when mixed processing isnt needed
Performance killer no. 1
Select using JOINS
The plus
Very large amount of data
Similar to Nested selects - when the accesses are planned by the programmer
In some cases the fastest
Not so memory critical
The minus
Very difficult to program/understand
Mixing processing and reading of data not possible
Use the selection criteria
SELECT * FROM SBOOK.
CHECK: SBOOK-CARRID = 'LH' AND
                  SBOOK-CONNID = '0400'.
ENDSELECT.
SELECT * FROM SBOOK
WHERE CARRID = 'LH' AND
        CONNID = '0400'.
ENDSELECT.
Use the aggregated functions
C4A = '000'.
SELECT * FROM T100
WHERE SPRSL = 'D' AND
        ARBGB = '00'.
CHECK: T100-MSGNR > C4A.
C4A = T100-MSGNR.
ENDSELECT.
SELECT MAX( MSGNR ) FROM T100 INTO C4A
WHERE SPRSL = 'D' AND
       ARBGB = '00'.
Select with view
SELECT * FROM DD01L
WHERE DOMNAME LIKE 'CHAR%'
        AND AS4LOCAL = 'A'.
SELECT SINGLE * FROM DD01T
    WHERE   DOMNAME    = DD01L-DOMNAME
        AND AS4LOCAL   = 'A'
        AND AS4VERS    = DD01L-AS4VERS
        AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
SELECT * FROM DD01V
WHERE DOMNAME LIKE 'CHAR%'
       AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
Select with index support
SELECT * FROM T100
WHERE     ARBGB = '00'
       AND MSGNR = '999'.
ENDSELECT.
SELECT * FROM T002.
SELECT * FROM T100
    WHERE     SPRSL = T002-SPRAS
          AND ARBGB = '00'
          AND MSGNR = '999'.
ENDSELECT.
ENDSELECT.
Select Into table
REFRESH X006.
SELECT * FROM T006 INTO X006.
APPEND X006.
ENDSELECT
SELECT * FROM T006 INTO TABLE X006.
Select with selection list
SELECT * FROM DD01L
WHERE DOMNAME LIKE 'CHAR%'
        AND AS4LOCAL = 'A'.
ENDSELECT
SELECT DOMNAME FROM DD01L
INTO DD01L-DOMNAME
WHERE DOMNAME LIKE 'CHAR%'
       AND AS4LOCAL = 'A'.
ENDSELECT
Key access to multiple lines
LOOP AT TAB.
CHECK TAB-K = KVAL.
ENDLOOP.
LOOP AT TAB WHERE K = KVAL.
ENDLOOP.
Copying internal tables
REFRESH TAB_DEST.
LOOP AT TAB_SRC INTO TAB_DEST.
APPEND TAB_DEST.
ENDLOOP.
TAB_DEST[] = TAB_SRC[].
Modifying a set of lines
LOOP AT TAB.
IF TAB-FLAG IS INITIAL.
    TAB-FLAG = 'X'.
ENDIF.
MODIFY TAB.
ENDLOOP.
TAB-FLAG = 'X'.
MODIFY TAB TRANSPORTING FLAG
           WHERE FLAG IS INITIAL.
Deleting a sequence of lines
DO 101 TIMES.
DELETE TAB_DEST INDEX 450.
ENDDO.
DELETE TAB_DEST FROM 450 TO 550.
Linear search vs. binary
READ TABLE TAB WITH KEY K = 'X'.
READ TABLE TAB WITH KEY K = 'X' BINARY SEARCH.
Comparison of internal tables
DESCRIBE TABLE: TAB1 LINES L1,
                TAB2 LINES L2.
IF L1 <> L2.
TAB_DIFFERENT = 'X'.
ELSE.
TAB_DIFFERENT = SPACE.
LOOP
AT TAB1.
    READ TABLE TAB2 INDEX SY-TABIX.
    IF TAB1 <> TAB2.
      TAB_DIFFERENT = 'X'. EXIT.
    ENDIF.
ENDLOOP.
ENDIF.
IF TAB_DIFFERENT = SPACE.
ENDIF.
IF TAB1[] = TAB2[].
ENDIF.
Modify selected components
LOOP AT TAB.
TAB-DATE = SY-DATUM.
MODIFY TAB.
ENDLOOP.
WA-DATE = SY-DATUM.
LOOP AT TAB.
MODIFY TAB FROM WA TRANSPORTING DATE.
ENDLOOP.
Appending two internal tables
LOOP AT TAB_SRC.
APPEND TAB_SRC TO TAB_DEST.
ENDLOOP
APPEND LINES OF TAB_SRC TO TAB_DEST.
Deleting a set of lines
LOOP AT TAB_DEST WHERE K = KVAL.
DELETE TAB_DEST.
ENDLOOP
DELETE TAB_DEST WHERE K = KVAL.
Tools available in SAP to pin-point a performance problem
·                The runtime analysis (SE30)
·                SQL Trace (ST05)
·                Tips and Tricks tool
·                The performance database
Optimizing the load of the database
Using table buffering
Using buffered tables improves the performance considerably. Note that in some cases a statement can not be used with a buffered table, so when using these statements the buffer will be bypassed. These statements are:
Select DISTINCT
ORDER BY / GROUP BY / HAVING clause
Any WHERE clause that contains a sub query or IS NULL expression
JOIN s
A SELECT... FOR UPDATE
If you wan t to explicitly bypass the buffer, use the BYPASS BUFFER addition to the SELECT clause.
Use the ABAP SORT Clause Instead of ORDER BY
The ORDER BY clause is executed on the database server while the ABAP SORT statement is executed on the application server. The database server will usually be the bottleneck, so sometimes it is better to move the sort from the database server to the application server.
If you are not sorting by the primary key ( E.g. using the ORDER BY PRIMARY key statement) but are sorting by another key, it could be better to use the ABAP SORT statement to sort the data in an internal table. Note however that for very large result sets it might not be a feasible solution and you would want to let the database server sort it.
Avoid the SELECT DISTINCT Statement
As with the ORDER BY clause it could be better to avoid using SELECT DISTINCT, if some of the fields are not part of an index. Instead use ABAP SORT + DELETE ADJACENT DUPLICATES on an internal table, to delete duplicate rows.
Thanks & regards
Sreenivasulu P

If I want to order by dateAdded to I have to include it in the select statement like

If I do this:
<cfquery name="chart" datasource="#datasource#">
select behaviourID,score, dateAdded2 = convert(varchar,
dateAdded , 101)
from staff_charts_data
where userID =
<cfqueryparam value="#arguments.userID#"
cfsqltype="cf_sql_integer"> AND
NOT score = 5
</cfquery>
If I want to order by dateAdded to I have to include it in
the select statement like so:
<cfquery name="chart" datasource="#datasource#">
select behaviourID,score, dateAdded2 = convert(varchar,
dateAdded , 101),dateAdded
from staff_charts_data
where userID =
<cfqueryparam value="#arguments.userID#"
cfsqltype="cf_sql_integer"> AND
NOT score = 5
</cfquery>

you should be able to order by dateAdded without it being in
the select clause. The only time the order by field has to be in
the select clause is when your query has an aggregate and group by
clause, like this:
select field1, field2, max(field3) as youralias
from sometables
where whatever
group by field1, field2
order by ???
You can only order field1, field2, max(field3) or youralias.
You can't order by field4.

How can I call a Page Process from the Select statement for Report Page

I'm able to call a javascript using the below:
img src="#IMAGE_PREFIX#add2.gif" border="0" alt="Icon 4" onClick="javascript:add_connect1('||CPORT.ID||')"
But Now,
I'd like to accomplish (2) New things:
1. instead of using,....... onClick="javascript:add_connect1,
I'd like to call a Page Process, onClick=
2. I'd like to be able to call two different processes onClick.
a. onClick="javascript:passBack('||ID||')"
b. onClick= <Please see my question #1 above>
Can someone please help me with the syntax for this,
If indeed it can even be done?
Thanks- Gary

Greg.
It seems that my situation is the one you describe in you second paragraph, where you mention:
you could then add the ID column value as a parameter to the javascript functionBut,
I do not know how to reference the variable in my javascript nor how to use it in my on-demand process.
If you can hellp me past this last little bump, then I think I will be able to use these skills in Sooo many different areas of my design.
Here's what I've got so far:
A. In the select statement I identify the javascript as:
onClick="javascript:connect_port('<font color=blue>''||ID||''</font>')";
B. In my javascript I have this:
<script language="JavaScript" type="text/javascript">
function connect_port(ID)
var get = new htmldb_Get(null,$x('pFlowId').value,'APPLICATION_PROCESS=CONNECT_PORT',0);
gReturn = get.get();
get = null;
</script>
C. In my on demand function I have this:
BEGIN
INSERT INTO CCONNECTIONS_B
BLDG_ID,CLST_ID,PORT_ID,STRAND_ID
) VALUES
:P2004_BLDG_ID,:P2004_CLST_ID,:P2004_PORT_ID,:P2004_STRAND_ID1
END;
You can see that I dont know how to use the value for 'ID' in either the javascript or the On-Process function.
If you can help me out with this one, Then I can imitate it for the rest.
-Gary
Edited by: garyNboston on Apr 3, 2009 6:44 AM
Edited by: garyNboston on Apr 3, 2009 6:44 AM
Edited by: garyNboston on Apr 3, 2009 6:45 AM
Edited by: garyNboston on Apr 3, 2009 6:47 AM

Database adapter and column aliases in the select statement (10.1.3.1)

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