SQL Script VS HANA views

Hi Gurus,
We are in the process of building the SAP HANA views. As we know there are multiple options
1) Attribute , Analytic & Calc views
2) Scripted Calculation views and CE functions.
I have read many articles and as per SAP Documentation, they say build the information view with Attribute, analytic and calculation View (Graphical) If it does not suffice they go for scripted calculation view.
Just wanted to understand. Are there any limitations or any issues faced in the projects with scripted calc views. If we look at the John Appleby tips, it suggests that avoid SQL script unless it cannot be done with graphical views.
http://scn.sap.com/community/hana-in-memory/blog/2013/12/29/6-golden-rules-for-new-sap-hana-developers
If we build the views with graphical method, then it seems the parallelism can very well achieved ,means query is split into multiple sub queries and executed in parallel as in Visualize plan.
If we write the Sql script, can this parallel processing achieved or not ? If the requirement can be achieved without writing script which method to choose.
I have included the 10 to 12 attribute views in analytic view then Calculation view; it seems there may be some performance issue which I am going to check. As we know we can use base table directly in calculation view. What is the best method to use .Can we use these base tables in calculation view directly or build the attribute views first, then analytic view and after that build calculation view.
As we know we use the attribute views from re usability perspective. Is there any other reason that we need to use attribute views instead of joining the base tables in calc view .
Regards
Ram Ramanathaiah

Thank you Krishna for the answers. I have gone through those links. But there is nowhere consensus opinion that the way we use the views. Some of the answers conflict each other .When we are starting the project we need to make decision about the best approach we wanted to take. If possible I would like to understand more about this from you and other experts.
1) Build the views with Attribute analytic or calc views or
2) Build the views only with base tables in calc views or
3) Build everything using the SQL script /CE functions.
Regards
Ram

Similar Messages

Out of memory Error while querying SQL Script based Calculation View

Hi All,
I wanted to test the performance of Graphical and SQL Script based Calculation views.
Created Graphical (CA_GRPH) and SQL Script (CA_SQL) Calculation views.
Analytic View (AN_GRPH) for both Calculation views are the same which is Graphical based (90 Attributes and 5 Measures)
In Analytic View data foundation I have a Fact table which has 1.5 Billion records and 9 Dimension Tables –collectively 500 million records (7 Attribute Views). 9 Referential joins with cardinality N:1 and 1 Referential join with cardinality N:N.
I wanted to keep (CA_GRPH) and (CA_SQL) as a base Calculation views and leverage those to create various calculation views (Will be creating different Calc views for respective Business segments)
In order to test this I have created below calc views on top of base calc views.
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SQL Script Based: Created (CA_GRPH_ABC) by having CA_SQL in projection view with 30 calculated columns – This errors out after 1.50 mins.
Could not execute 'SELECT "COLUMN_A","COLUMN _B"," COLUMN _C"," COLUMN _D", SUM("COLUMN _REVENUE") AS ...' in 1:50.480 minutes .
SAP DBTech JDBC: [2048]: column store error: [2048] column store error: search table error: [1000002] Error executing physical plan: exception 1000002:
ltt/impl/memory.cpp:63
Out of memory ; $size$=1507711; $name$=ihm; $type$=pool; $inuse_count$=170104; $allocated_size$=219215007925
exception 1000002:
Any suggestion / help in fixing this issue will be greatly appreciated.
Regards,
Av

Hi Raj,
Thanks for your time, please find edited snap hot of Analytic View (AN_GRPH) below,
Calculation view(CA_SQL)
        /********* Begin Procedure Script ************/
BEGIN
       var_out =
     SELECT
            "COLUMN_1"
            "COLUMN_2",
            "COLUMN_84",
            "COLUMN_85;",
            SUM("REVN") AS "REVN",
            SUM("MGN") AS "MGN",
            SUM("ORD_QTY") AS "ORD_QTY",
            SUM("SYS_QTY1") AS "SYS_QTY1",
            SUM("SYS_QTY") AS "SYS_QTY"
FROM
      "_SYS_BIC"."XYZ/AN_GRPH"
GROUP BY
            "COLUMN_1"
            "COLUMN_2",
            "COLUMN_84",
            "COLUMN_85";
END
/********* End Procedure Script ************/
Later i have built one more Calculation view(CA_GRPH_ABC) using (CA_SQL)in projection. i have 30 calculated measures in this final calc view. this final calc view is throwing above mentioned error.
Not sure if i can use SQL script based calc view in graphical based calc views?
Regards,
AV

Underlying SQL or SQL Script for Calculated Views Create Graphically

Hello,
Is it possible to view the SQL or SQL script generated for calculated views that are created graphically?

Hi Mike,
For your calculation view you will find the corresponding column view created in schema '_SYS_BIC'-->Column Tables->
<packagename>/<Calculation view> --> Open Definition of this and check the 'create statement'.
Note: This is a information modeler generated SQL script which will show the generated Calculation Scenario and the respective Column View.
Regards, Rahul
Seems the answer was already given by Murali while I typed
Edited by: Rahul Pant on Mar 2, 2012 5:22 AM

How to move SQL scripts using HANA ALM ?

I see clear documentation of moving the content easily from Dev to test and to production using DU which exports only content. Similarly can we use the transport management/ALM for moving sql scripts, for example table creation scripts or table structures that needs to be moved from Dev to QA ?
Thanks
Suresh

Sutirtha,
Thank you very much. I really appreciate all of your responses.
I have one more question ( Sorry for flooding you with lot of questions :) )
How to capture the errors which occured inside the SQL Scripts.
My scenario is like this. I have two sql scripts Script_1.sql and Script2.sql namely. I would like to put dependency on the execution of the scripts.
If Script_1.sql executes succesfully without any errors, then EXECUTE Script_2.sql
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As of now, i observed that the Process flow shows Success State even if there is an error in the sql script execution. Because of which i was not able to put dependency on the execution of the scripts.
I think i can do it by tweaking(changing) the code inside the SQL Scripts, like logging the errors in some log table and reading it before the next script execution.
But the restriction is, I Should not touch/change the existing SQL Scripts.
Do we have any mechanism in the ProcessFlows to identify the SQL Errors that occurred during execution of SQL Scripts ?
Please suggest any idea on this. It will be great if you can help in this.
Thanks in advance,
SriGP.

Write to ERP Tables on HANA DB using SQL script

Hello All,
We are using HANA as our primary database for ABAP system and trying to feed the data to ABAP tables using SQL script and experiencing authorization errors . Please see below for more details.
Scenario.
I am getting no authorised error when i try to write some data to Z* tables using SQL script in HANA studio.But I am able to create new tables in the same schema.
As shown above Query1: SAPSR1 is the schema which contains underline ABAP tables. ZGSA is existing table and now i am trying to insert new rows into it.
Query 2&3: Creating new tables in SAPSR1 works fine.
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Thanks in advance,
Naresh

Hi Naresh,
Obi Wan would now probably say: "this is not the functionality you're looking for".
Even though you are working with Z-tables you really don't want to start messing with those from outside the context of the NetWeaver system.
Instead you want to keep the control over all tables in the NetWeaver schema completely to the SAP<sid> user and NetWeaver.
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IF statement syntax in SQL script view

I need to include a "IF" condition in the "SELECT" section of my SQL script view.
I tried the following syntax's but I get the error 'Incorrect SQL syntax near 'IF'
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2. IF(Revenue != '0' AND Quantity != '0', Revenue/Quantity, '0') AS Gross Price
3. IF(Revenue <> '0' AND Quantity <> '0' THEN Revenue/Quantity ELSE '0' END) AS Gross Price
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SELECT field1, field2, IF(......) AS field3
FROM table1
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Hi Lakshmi,
below is the syntax for IF statement.
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<then_stmts1>
ELSEIF <bool_expr2>
THEN <then_stmts2>
[ELSE <else_stmts3>]
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END;
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All all
Can any one tell how to use views in sql script report?

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Hello Experts.
My scenario assumes to load data from source to target with reading attributes in HANA Expert SQL Script and storing them into target object.
(e.g. I have 0PLANT in Source and in target I store 0PLANT with it attributes: SALESORG,RF_STORETY, DISTR_CHAIN etc)
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Exception CX_RSDHA_MSG logged
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I've modeled two DSO and try next cases:
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The second case is when I add new field(attribute of any source characteristic) to the target DSO(of course I make changes in my script for this new field). In these case I got an error:
Saving ended with errors
S:RSDHA:383 /BIC/Z* --added infoobject name
Exception CX_RSDHA_MSG logged
The same error occurs when I'm trying to load data from DataSource based on OpenDSO.
Does anybody know why it happens?
Thanks for any help.
Best regards,
Alex.

Hello.
I've discovered some interesting things:
1) if target has no KeyFigures, you're able to have a different structures of inTab and outTab. So you can move data as you wish.
2) if target KeyFigures are subset of source KeyFigures (the same InfoObjects or the same field names "/BIC/ZKFIG"), you can also have a different srtructures of inTab and outTab.
So there is some workaround with namings. The only question is how to add new KeyFigures and calculate them through Expert HANA Script.
Best regards,
Andrew
Edit:
If target attributes are subset of source and follow the same order as source, you can make a transformation. If they have different order, you'll get that error.

Guidelines for HANA SQL Script

Dear Experts,
Could you please share best practices on the usage of SQL script in procedures and Script based calculation views?
I searched already for the relevant information, but could not find any yet. I request you share any information other than what is available in help.sap.com based on your experience.
Thank you,
Raghavendra.

Hi Raghavendra,
As Lars said, it is very difficult to answer your question and it always depend on the designing solution for specific requirements. General rules we follow in scripting are
1. Avoid inline queries
2. Break complex SQL to small and simple SQL statements and club the results
3. Always analyze cost using Visualize Plan
4. Avoid cursors/loops
5. Avoid mix of SQL and CE (most commonly found best practice )
Regards,
Chandra.

View in which all sql scripts are stored

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column dt new_value today noprint
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set pages 55 lines 132 trims on
ttitle 'Full Table/Index Scans'
spool fts&&today
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v$sql_Plan a, v$sqlarea b, dba_segments c
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Creating Logic and modeling for SAP BW datasource in SAP HANA views and SLT

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Pavneet Rana

Can't Upload SQL scripts or application scripts in APEX 3.1

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One application I import is the sample OEHR application which imports correctly at the hosted site.
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I've included my dads.conf below and also some Apache error entries
Alias /i/ "e:\oracle\product\10.1.0\Db\Apache\Apache\images/"
AddType text/xml     xbl
AddType text/x-component     htc
<Location /pls/apex>
Order deny,allow
PlsqlDocumentPath docs
AllowOverride None
PlsqlDocumentProcedure      wwv_flow_file_mgr.process_download
PlsqlDatabaseConnectString     csora:1521:ORCL ServiceNameFormat
PlsqlNLSLanguage          AMERICAN_AMERICA.AL32UTF8
PlsqlAuthenticationMode     Basic
SetHandler          pls_handler
PlsqlDocumentTablename     wwv_flow_file_object$
PlsqlDatabaseUsername     APEX_PUBLIC_USER
plsqlDefaultPage          apex
PlsqlDatabasePassword     hocking
Allow from all
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I:[Mon Apr 14 15:52:35 2008] [error] [client 10.116.101.158] [ecid: 1208202755:198.30.4.195:2696:2864:2873,0] File does not exist: e:/oracle/product/10.1.0/db/apache/apache/htdocs/pls/htmldb/builder/topnav2.gif
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[Mon Apr 14 15:52:35 2008] [error] [client 10.116.101.158] [ecid: 1208202755:198.30.4.195:2696:2944:2767,0] File does not exist: e:/oracle/product/10.1.0/db/apache/apache/htdocs/pls/htmldb/builder/left_curve.gif
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[Mon Apr 14 16:19:33 2008] [error] [client 10.116.101.158] [ecid: 1208204373:198.30.4.195:2696:2924:2773,0] File does not exist: e:/oracle/product/10.1.0/db/apache/apache/htdocs/pls/htmldb/builder/topnav2.gif
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Val,
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exec lazarus.PopulateGridPositions;
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ERROR at line 1:
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ORA-06508: PL/SQL: could not find program unit being called: "LAZARUS.LAZARUS"
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Histon FTM wrote:
ORA-04063: package body "LAZARUS.LAZARUS" has errors Above, obviously conflicts with the statement that follows:
>
The procedure and package have both compiled without errors and the statement on its own works fine in SQL*Plus.I suggest you take a look in the USER_ERRORS view to see, what the errors are.
And just checking:
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Edited by: Toon Koppelaars on Oct 1, 2009 5:55 PM

An error occurred while applying SQL script for the feature BackendStore.

Hello,
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Please check you have enough disk space for the disk where the folders are.
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The following link is a similar thread for you to refer:
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SQL script: dynamic table creation

Hello,
I should write a sql script to do the following (simplified):
- Create a table if it doesn't exist yet
- Select something from the newly created table and do further conditional actions
I've tried something like that:
DECLARE
lv_count INTEGER;
BEGIN
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SELECT COUNT(*) INTO lv_count FROM user_tables WHERE table_name = 'DATABASEINFO';
IF(lv_count = 0)
THEN
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How to solve that?
Best Regards
Andreas

866121 wrote:
Hello,
I should write a sql script to do the following (simplified):
- Create a table if it doesn't exist yet
- Select something from the newly created table and do further conditional actions
I've tried something like that:
DECLARE
lv_count INTEGER;
BEGIN
DBMS_OUTPUT.enable();
SELECT COUNT(*) INTO lv_count FROM user_tables WHERE table_name = 'DATABASEINFO';
IF(lv_count = 0)
THEN
     DBMS_OUTPUT.PUT_LINE('Create DatabaseInfo');
EXECUTE IMMEDIATE
     'CREATE TABLE DATABASEINFO(
          ZDatabaseInfoId RAW(16) NOT NULL,
          ZInfo VARCHAR2(30) NOT NULL,
          ZValue VARCHAR2(100) NOT NULL,
CONSTRAINT DatabaseInfo_U_NC_PK PRIMARY KEY
ZDatabaseInfoId
END IF;
SELECT COUNT(*) INTO lv_count FROM DatabaseInfo WHERE ZInfo = 'anything';
The select statement fails with error message "Table or view cannot be found". As far as I know, this is because the table is created dynamically and validation of the sql script fails because the table doesn't exist on compile time.
How to solve that?
why, oh why, are you dynamically making table?
DDL should be done only once via static SQL.
dig a deeper hole & EXECUTE IMMEDIATE the SELECT.

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