Data dictionary and data source

Hi
In http://help.sap.com/saphelp_nw04/helpdata/en/6c/c8bbdc13a8435fa4e0d7ccd97bb1ea/frameset.htm it explains how to create a data dictionary and web frontend.
Regards to this point "Choose New -> Other. Choose Persistence in the left-hand pane and SQLJ Source in the right-hand pane", it creates a java class with the class body etc. So I do I just overwrite it with
package temp.persistence.gettingstarted.dao;
#sql public context Ctx with (dataSource = "java:comp/env/TMP_PERSISTENCE_EXAMPLE");
Please help me in creating a data source alias, I dont get this option "New -> META-INF/data-source-aliases.xml.
" in j2ee explorer

Hello,
You have several options to create an alias http://help.sap.com/saphelp_nw2004s/helpdata/en/ea/a418d295d4493fa51aaad026a756b3/frameset.htm
the option New -> META-INF/data-source-aliases.xml that you are referring to, requires Enterprise Archive project.
Once you create the project you will see the New -> META-INF/data-source-aliases.xml on the right click menu.
Regards,
Dmitry

Similar Messages

Difference between data dictionary and data base

Hi,
Please give me clear view on data dictionary and data base.
Thanks
margani

Hi Margini,
Please check the forms u can find the lot of answers
Here is a link
http://www.sapdb.info/abap-data-dictionary/
What is a data dictionary?
Data Dictionary is a central source of data in a data management system. Its main function is to support the creation and management of data definitions. It has details about
·            what data is contained?
·            What are the attributes of the data?
·            What is the relationship existing between the various data elements?
Best regards,
raam

Difference between Data Dictionary and OLAP Catalog

Can someone tell me the difference between the Data Dictionary and the OLAP Catalog. I unterstand that the OLAP Catalog hold the metadata for the AW. But I don't unterstand what do the Data Dictionary? Is this for the relational tabel?

Hi Margini,
Please check the forms u can find the lot of answers
Here is a link
http://www.sapdb.info/abap-data-dictionary/
What is a data dictionary?
Data Dictionary is a central source of data in a data management system. Its main function is to support the creation and management of data definitions. It has details about
·            what data is contained?
·            What are the attributes of the data?
·            What is the relationship existing between the various data elements?
Best regards,
raam

Diff B/w ABAP Dictionary and Data Dictionary

What is the difference between ABAP Dictionary and Data Dictionary........

Hi,
Both are the same.
Please check this online document perhaps it may help.
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCDWBDIC/BCDWBDIC.pdf
Regards,
Ferry Lianto

Data View and Data Source buttons Greyed out

I have Site Admin permissions on an On Prem SharePoint 2013 site.
In SharePoint Designer 2013 the Data View and Data Source buttons are greyed out.
Can anyone shed some light as to why this is occurring?

Hi grantzre,
Could you provide a screenshot about the location you want to insert the Data View web part and Data Source?
I think you may put the mouse cursor in the incorrect place to add the data view web part, please try putting the cursor before the tag </ZoneTemplate> and see if "Data View" button is enabled, then you can insert an empty
dataview web part and then insert the data source in tag <DataSources> by clicking ribbon button "Data Source" (also click the ribbon button "Parse HTML" of the page if needed).
Thanks
Daniel Yang
TechNet Community Support

How to find data dictionary and oracle schema tables for UTF8 char conversi

I am doing UTF8 char conversition, i got lot of convertable objects,as per document we don't need to worry about data dictionary objects and how to find data dictionary and oracle schema objects for UTF8 char conversition.
USER.TABLE Convertible Truncation Lossy
MDSYS.OPENLS_NODES 17 0 0
MDSYS.SDO_COORD_OP_PARAM_VALS 200 0 0
MDSYS.SDO_GEOR_XMLSCHEMA_TABLE 1 0 0
MDSYS.SDO_STYLES_TABLE 78 0 0
MDSYS.SDO_XML_SCHEMAS 3 0 0
ORDDATA.ORDDCM_CT_PRED_OPRD 51 0 0
ORDDATA.ORDDCM_DOCS 9 0 0
ORDDATA.ORDDCM_MAPPING_DOCS 1 0 0
SYS.METASTYLESHEET 178 0 0
SYS.REGISTRY$ERROR 2 0 0
SYS.RULE$ 21 0 0
SYS.SCHEDULER$_EVENT_LOG 182 0 0
SYS.WRH$_SQLTEXT 2,099 0 0
SYS.WRH$_SQL_PLAN 1,736 0 0
SYS.WRI$_ADV_ACTIONS 5,452 0 0
SYS.WRI$_ADV_DIRECTIVE_META 5 0 0
SYS.WRI$_ADV_OBJECTS 2,278 0 0
SYS.WRI$_ADV_RATIONALE 9,594 0 0
SYS.WRI$_ADV_SQLT_PLANS 455 0 0
SYS.WRI$_ADV_SQLT_PLAN_STATS 288 0 0
SYS.WRI$_DBU_FEATURE_METADATA 188 0 0
SYS.WRI$_DBU_FEATURE_USAGE 16 0 0
SYS.WRI$_DBU_HWM_METADATA 20 0 0
SYS.WRI$_REPT_FILES 27 0 0
XDB.XDB$DXPTAB 2 0 0
XML CSX Dictionary Tables:
USER.TABLE Convertible Truncation Lossy
Application Data:
USER.TABLE Convertible Truncation Lossy
APPLSYS.BISM_OBJECTS 4 0 0
APPLSYS.DR$FND_LOBS_CTX$I 0 103 1,260,883
APPLSYS.FND_CONC_PROG_ANNOTATIONS 272 0 0
APPLSYS.FND_OAM_CONTEXT_FILES 15 0 0
APPLSYS.FND_OAM_DOC_LINK 1 0 0
APPS.FND_OAM_CONTEXT_FILES_1 6 0 0
AZ.AZ_APIS 11 0 0
AZ.AZ_SELECTION_SET_ENTITIES_B 48 0 0
ECX.ECX_DTDS 205 0 0
ECX.ECX_FILES 91 0 0
IBC.IBC_ATTRIBUTE_BUNDLES 41 0 0
JTF.JTF_HEADER_DTD 1 0 0
JTF.JTF_MESSAGE_OBJECTS 82 0 0
JTF.JTY_TRANS_USG_PGM_SQL 29 0 0
ODM.ODM_PMML_DTD 1 0 0
OKC.OKC_REPORT_SQL_B 3 0 0
OKC.OKC_REPORT_SQL_TL 2 0 0
OKC.OKC_REPORT_XSL_TL 5 0 0
XDP.XDP_PROC_BODY 10 0 0
[Distribution of Convertible, Truncated and Lossy Data by Column]
Data Dictionary Tables:
USER.TABLE|COLUMN Convertible Truncation Lossy
MDSYS.OPENLS_NODES|SYS_NC00004$ 17 0 0
MDSYS.SDO_COORD_OP_PARAM_VALS|PARAM_VALUE_FILE 200 0 0
MDSYS.SDO_GEOR_XMLSCHEMA_TABLE|XMLSCHEMA 1 0 0
MDSYS.SDO_STYLES_TABLE|DEFINITION 78 0 0
MDSYS.SDO_XML_SCHEMAS|XMLSCHEMA 3 0 0
ORDDATA.ORDDCM_CT_PRED_OPRD|SYS_NC00004$ 51 0 0
ORDDATA.ORDDCM_DOCS|SYS_NC00005$ 9 0 0
ORDDATA.ORDDCM_MAPPING_DOCS|SYS_NC00007$ 1 0 0
SYS.METASTYLESHEET|STYLESHEET 178 0 0
SYS.REGISTRY$ERROR|MESSAGE 1 0 0
SYS.REGISTRY$ERROR|STATEMENT 1 0 0
SYS.RULE$|CONDITION 21 0 0
SYS.SCHEDULER$_EVENT_LOG|ADDITIONAL_INFO 182 0 0
SYS.WRH$_SQLTEXT|SQL_TEXT 2,099 0 0
SYS.WRH$_SQL_PLAN|OTHER_XML 1,736 0 0
SYS.WRI$_ADV_ACTIONS|ATTR5 2,726 0 0
SYS.WRI$_ADV_ACTIONS|ATTR6 2,726 0 0
SYS.WRI$_ADV_DIRECTIVE_META|DATA 5 0 0
SYS.WRI$_ADV_OBJECTS|ATTR4 2,278 0 0
SYS.WRI$_ADV_RATIONALE|ATTR5 9,594 0 0
SYS.WRI$_ADV_SQLT_PLANS|OTHER_XML 455 0 0
SYS.WRI$_ADV_SQLT_PLAN_STATS|OTHER 288 0 0
SYS.WRI$_DBU_FEATURE_METADATA|INST_CHK_LOGIC 21 0 0
SYS.WRI$_DBU_FEATURE_METADATA|USG_DET_LOGIC 167 0 0
SYS.WRI$_DBU_FEATURE_USAGE|FEATURE_INFO 16 0 0
SYS.WRI$_DBU_HWM_METADATA|LOGIC 20 0 0
SYS.WRI$_REPT_FILES|SYS_NC00005$ 27 0 0
XDB.XDB$DXPTAB|SYS_NC00006$ 2 0 0
XML CSX Dictionary Tables:
USER.TABLE|COLUMN Convertible Truncation Lossy
Application Data:
USER.TABLE|COLUMN Convertible Truncation Lossy
APPLSYS.BISM_OBJECTS|SYS_NC00023$ 4 0 0
APPLSYS.DR$FND_LOBS_CTX$I|TOKEN_TEXT 0 103 1,260,883
APPLSYS.FND_CONC_PROG_ANNOTATIONS|PROGRAM_ANNOTAT 272 0 0
APPLSYS.FND_OAM_CONTEXT_FILES|TEXT 15 0 0
APPLSYS.FND_OAM_DOC_LINK|DOC_LINK_INFO 1 0 0
APPS.FND_OAM_CONTEXT_FILES_1|TEXT 6 0 0
AZ.AZ_APIS|FILTERING_PARAMETERS 11 0 0
AZ.AZ_SELECTION_SET_ENTITIES_B|FILTERING_PARAMETE 48 0 0
ECX.ECX_DTDS|PAYLOAD 205 0 0
ECX.ECX_FILES|PAYLOAD 91 0 0
IBC.IBC_ATTRIBUTE_BUNDLES|ATTRIBUTE_BUNDLE_DATA 41 0 0
JTF.JTF_HEADER_DTD|HEADER_DTD 1 0 0
JTF.JTF_MESSAGE_OBJECTS|BUS_OBJ_DTD 41 0 0
JTF.JTF_MESSAGE_OBJECTS|BUS_OBJ_SQL 41 0 0
JTF.JTY_TRANS_USG_PGM_SQL|BATCH_DEA_SQL 1 0 0
JTF.JTY_TRANS_USG_PGM_SQL|BATCH_INCR_SQL 5 0 0
JTF.JTY_TRANS_USG_PGM_SQL|BATCH_TOTAL_SQL 6 0 0
JTF.JTY_TRANS_USG_PGM_SQL|INCR_REASSIGN_SQL 5 0 0
JTF.JTY_TRANS_USG_PGM_SQL|REAL_TIME_INSERT 6 0 0
JTF.JTY_TRANS_USG_PGM_SQL|REAL_TIME_SQL 6 0 0
ODM.ODM_PMML_DTD|DTD 1 0 0
OKC.OKC_REPORT_SQL_B|SQL_TEXT 3 0 0
OKC.OKC_REPORT_SQL_TL|HELP_TEXT 2 0 0
OKC.OKC_REPORT_XSL_TL|HELP_TEXT 2 0 0
OKC.OKC_REPORT_XSL_TL|XSL_TEXT 3 0 0
XDP.XDP_PROC_BODY|PROC_BODY 10 0 0
-------------------------------------------------- ---------------- ---------------- ----------------

Hi;
Please run below query which could be helpful for your issue:
select * from dictionary where TABLE_NAME LIKE '%NLS%'
select * from dictionary where TABLE_NAME LIKE '%GLOBAL%'
Regard
Helios

Difference b/w DATA TYPE and DATA OBJECT & differences b/w TYPE and LIKE

hai
can any one say the differences between Data type and Data Object.
And also differences between TYPE and LIKE
thanks
Gani

hi,
_Data Types and Data Objects_
      Programs work with local program data that is, with byte sequences in the working memory. Byte sequences that belong together are called fields and are characterized by a length, an identity (name), and as a further attribute by a data type. All programming languages have a concept that describes how the contents of a field are interpreted according to the data type.
      In the ABAP type concept, fields are called data objects. Each data object is thus an instance of an abstract data type. There are separate name spaces for data objects and data types. This means that a name can be the name of a data object as well as the name of a data type simultaneously.
Data Types
   As well as occurring as attributes of a data object, data types can also be defined independently. You can then use them later on in conjunction with a data object. The definition of a user-defined data type is based on a set of predefined elementary data types. You can define data types either locally in the declaration part of a program using the TYPESstatement) or globally in the ABAP Dictionary. You can use your own data types to declare data objects or to check the types of parameters in generic operations.
     All programming languages distinguish between various types of data with various uses, such as .. type data for storing or displaying values and numerical data for calculations. The attributes in question are described using data types. You can define, for example, how data is stored in the repository, and how the ABAP statements work with the data.
Data types can be divided into elementary, reference, and complex types.
a. Elementary Types
These are data types of fixed or variable length that are not made up of other types.
The difference between variable length data types and fixed length data types is that the length and the memory space required by data objects of variable length data types can change dynamically during runtime, and that these data types cannot be defined irreversibly while the data object is being declared.
Predefined and User-Defined Elementary Data Types
You can also define your own elementary data types in ABAP using the TYPES statement. You base these on the predefined data types. This determines all of the technical attributes of the new data type. For example, you could define a data type P_2 with two decimal places, based on the predefined data type P. You could then use this new type in your data declarations.
b. Reference Types
Reference types are deep data types that describe reference variables, that is, data objects that contain references. A reference variable can be defined as a component of a complex data object such as a structure or internal table as well as a single field.
c. Complex Data Types
Complex data types are made up of other data types. A distinction is made here between structured types and table types.
Data Objects
      Data objects are the physical units with which ABAP statements work at runtime. The contents of a data object occupy memory space in the program. ABAP statements access these contents by addressing the name of the data object and interpret them according to the data type.. For example, statements can write the contents of data objects in lists or in the database, they can pass them to and receive them from routines, they can change them by assigning new values, and they can compare them in logical expressions.
       Each ABAP data object has a set of technical attributes, which are fully defined at all times when an ABAP program is running (field length, number of decimal places, and data type). You declare data objects either statically in the declaration part of an ABAP program (the most important statement for this is DATA), or dynamically at runtime (for example, when you call procedures). As well as fields in the memory area of the program, the program also treats literals like data objects.
        A data object is a part of the repository whose content can be addressed and interpreted by the program. All data objects must be declared in the ABAP program and are not persistent, meaning that they only exist while the program is being executed. Before you can process persistent data (such as data from a database table or from a sequential file), you must read it into data objects first. Conversely, if you want to retain the contents of a data object beyond the end of the program, you must save it in a persistent form.
Declaring Data Objects
      Apart from the interface parameters of procedures, you declare all of the data objects in an ABAP program or procedure in its declaration part. These declarative statements establish the data type of the object, along with any missing technical attributes. This takes place before the program is actually executed. The technical attributes can then be queried while the program is running.
     The interface parameters of procedures are generated as local data objects, but only when the procedure is actually called. You can define the technical attributes of the interface parameters in the procedure itself. If you do not, they adopt the attributes of the parameters from which they receive their values.
ABAP contains the following kinds of data objects:
a. Literals
Literals are not created by declarative statements. Instead, they exist in the program source code. Like all data objects, they have fixed technical attributes (field length, number of decimal places, data type), but no name. They are therefore referred to as unnamed data objects.
b. Named Data Objects
Data objects that have a name that you can use to address the ABAP program are known as named objects. These can be objects of various types, including text symbols, variables and constants.
Text symbols are pointers to texts in the text pool of the ABAP program. When the program starts, the corresponding data objects are generated from the texts stored in the text pool. They can be addressed using the name of the text symbol.
Variables are data objects whose contents can be changed using ABAP statements. You declare variables using the DATA, CLASS-DATA, STATICS, PARAMETERS, SELECT-OPTIONS, and RANGESstatements.
Constants are data objects whose contents cannot be changed. You declare constants using the CONSTANTSstatement.
c. Anonymous Data Objects
Data objects that cannot be addressed using a name are known as anonymous data objects. They are created using the CREATE DATAstatement and can be addressed using reference variables.
d. System-Defined Data Objects
System-defined data objects do not have to be declared explicitly - they are always available at runtime.
e. Interface Work Areas
Interface work areas are special variables that serve as interfaces between programs, screens, and logical databases. You declare interface work areas using the TABLES and NODESstatements.
What is the difference between Type and Like?
Answer1:
TYPE, you assign datatype directly to the data object while declaring.
LIKE,you assign the datatype of another object to the declaring data object. The datatype is referenced indirectly.
Answer2:
Type is a keyword used to refer to a data type whereas Like is a keyword used to copy the existing properties of already existing data object.
Answer3:
type refers the existing data type
like refers the existing data object
reward if useful
thanks and regards
suma sailaja pvn

Data types and data objects

diff b/w data types and data objects

hi prasanth,
Data Types and Data Objects
Programs work with local program data that is, with byte sequences in the working memory. Byte sequences that belong together are called fields and are characterized by a length, an identity (name), and as a further attribute by a data type. All programming languages have a concept that describes how the contents of a field are interpreted according to the data type.
In the ABAP type concept, fields are called data objects. Each data object is thus an instance of an abstract data type. There are separate name spaces for data objects and data types. This means that a name can be the name of a data object as well as the name of a data type simultaneously.
Data Types
Data types are templates for creating data objects. Data types can be defined independently in the ABAP program or in the ABAP Dictionary. As attributes of a data object, data types can also exist in a non-independent state. Data types do not use any memory space for work data, but may require memory for administration information.
As well as occurring as attributes of a data object, data types can also be defined independently. You can then use them later on in conjunction with a data object. The definition of a user-defined data type is based on a set of predefined elementary data types. You can define data types either locally in the declaration part of a program using the TYPESstatement) or globally in the ABAP Dictionary. You can use your own data types to declare data objects or to check the types of parameters in generic operations.
All programming languages distinguish between various types of data with various uses, such as .. type data for storing or displaying values and numerical data for calculations. The attributes in question are described using data types. You can define, for example, how data is stored in the repository, and how the ABAP statements work with the data.
Data types can be divided into elementary, reference, and complex types.
a. Elementary Types
These are data types of fixed or variable length that are not made up of other types.
The difference between variable length data types and fixed length data types is that the length and the memory space required by data objects of variable length data types can change dynamically during runtime, and that these data types cannot be defined irreversibly while the data object is being declared.
Predefined and User-Defined Elementary Data Types
You can also define your own elementary data types in ABAP using the TYPES statement. You base these on the predefined data types. This determines all of the technical attributes of the new data type. For example, you could define a data type P_2 with two decimal places, based on the predefined data type P. You could then use this new type in your data declarations.
b. Reference Types
Reference types are deep data types that describe reference variables, that is, data objects that contain references. A reference variable can be defined as a component of a complex data object such as a structure or internal table as well as a single field.
c. Complex Data Types
Complex data types are made up of other data types. A distinction is made here between structured types and table types.
Data Objects
A data object is an instance of a data type and occupies as much memory space as its type specifies. An ABAP program only works with data that is available as content of data objects. Data objects are either created implicitly as named data objects, or exanonymous data objects using CREATEDATA.
Data objects are the physical units with which ABAP statements work at runtime. The contents of a data object occupy memory space in the program. ABAP statements access these contents by addressing the name of the data object and interpret them according to the data type.. For example, statements can write the contents of data objects in lists or in the database, they can pass them to and receive them from routines, they can change them by assigning new values, and they can compare them in logical expressions.
Each ABAP data object has a set of technical attributes, which are fully defined at all times when an ABAP program is running (field length, number of decimal places, and data type). You declare data objects either statically in the declaration part of an ABAP program (the most important statement for this is DATA), or dynamically at runtime (for example, when you call procedures). As well as fields in the memory area of the program, the program also treats literals like data objects.
A data object is a part of the repository whose content can be addressed and interpreted by the program. All data objects must be declared in the ABAP program and are not persistent, meaning that they only exist while the program is being executed. Before you can process persistent data (such as data from a database table or from a sequential file), you must read it into data objects first. Conversely, if you want to retain the contents of a data object beyond the end of the program, you must save it in a persistent form.
Declaring Data Objects
Apart from the interface parameters of procedures, you declare all of the data objects in an ABAP program or procedure in its declaration part. These declarative statements establish the data type of the object, along with any missing technical attributes. This takes place before the program is actually executed. The technical attributes can then be queried while the program is running.
The interface parameters of procedures are generated as local data objects, but only when the procedure is actually called. You can define the technical attributes of the interface parameters in the procedure itself. If you do not, they adopt the attributes of the parameters from which they receive their values.
ABAP contains the following kinds of data objects:
a. Literals
Literals are not created by declarative statements. Instead, they exist in the program source code. Like all data objects, they have fixed technical attributes (field length, number of decimal places, data type), but no name. They are therefore referred to as unnamed data objects.
b. Named Data Objects
Data objects that have a name that you can use to address the ABAP program are known as named objects. These can be objects of various types, including text symbols, variables and constants.
Text symbols are pointers to texts in the text pool of the ABAP program. When the program starts, the corresponding data objects are generated from the texts stored in the text pool. They can be addressed using the name of the text symbol.
Variables are data objects whose contents can be changed using ABAP statements. You declare variables using the DATA, CLASS-DATA, STATICS, PARAMETERS, SELECT-OPTIONS, and RANGESstatements.
Constants are data objects whose contents cannot be changed. You declare constants using the CONSTANTSstatement.
c. Anonymous Data Objects
Data objects that cannot be addressed using a name are known as anonymous data objects. They are created using the CREATE DATAstatement and can be addressed using reference variables.
d. System-Defined Data Objects
System-defined data objects do not have to be declared explicitly - they are always available at runtime.
e. Interface Work Areas
Interface work areas are special variables that serve as interfaces between programs, screens, and logical databases. You declare interface work areas using the TABLES and NODESstatements.
regards,
sravanthi

Data Integrator and Data Quality

Hi,
I worked on BI 7.0 and now exploring Business objects. I wanted to know how Data Integrator and Data Quality products relate to SAP BI 7. What is the purpose of using them. Is this integration and quality features not embedded in SAP BI 7.

BI and Data Services share many integration features, but Data Service provides better connectivity to third party data sources. The data quality features of Data Services are not available in BI.

How to view "date from" and "date to"

Hi,
I have loaded EMP data. In the mapping "date from" and "date to" are visible. But these fields are not seen when I display the EMP data.Can someone please tell me how to view these fields?
Thanks,
Williams

I got your question . Please find my understandings .
In the transformation Please check weather routine or formula is written which is stopping the dats
to be updated to the target .
I mean data is there in the source but if its not updating to target it seems some rules have been set up in the transformation . Please check .
Assign marks is the best way to appreciate help

Data package and data packet

Hit
i want to know the difference between data package and data packet .when this comes in sap bw
with regards
tushar

Hello,
Data package term is related to DTP which is used to load Data from PSA to further Data Targets
Start and end routine works at package level so routine run for each package one by one .By default package have sorted data based on keys (non unique keys (characteristics )of source or target) and by setting semantic keys you can change this order.So Package having more data will take more time in processing then package have lesser data .
Data Packet Term is related to Info Package which is used to load data from Source System to BI (PSA).
As per SAP standard, we prefer to have 50,000 records per one data packet.
For every data packet, it does commit & save --- so less no. of data packets required.
If you have 1 lakh records per data packet and there is an error in the last record, the entire packet gets failed.
Hope it helps!

Data types and Data object

Can Any one give me Clear definition of Data type and Data objects.
Concept i know clearly.. but unable to explain it..
Regards,
Prasanna

Data consists of strings of bytes in the memory area of the program. A string of related bytes is called a field. Each field has an identity (a name) and a data type. All programming languages have a concept that describes how the contents of a field are interpreted according to the data type.
         In the ABAP type concept, fields are called data objects. Each data object is an instance of an abstract data type. Data types in ABAP are not just attributes of fields, but can be defined in their own right. There are separate name spaces for data objects and data types. This means that a name can at the same time be the name of a data   object as well as the name of a data type.
<b>Data Types:</b>
                 As well as occurring as attributes of a data object, data types can also be defined independently. The definition of a user-defined data type is based on a set of predefined elementary data types. You can define data types either locally in the declaration part of a program (using the TYPES statement) or globally in the ABAP Dictionary. You can use your own data types to declare data objects or to check the types of parameters in generic operations.
         Data types can be divided into elementary, reference, and complex types
<b>Data objects:</b>
                  Data objects are the physical units with which ABAP statements work at runtime. Each ABAP data object has a set of technical attributes, which are fully defined at all times when an ABAP program is running. The technical attributes of a data object are its length, number of decimal places, and data type. ABAP statements work with the contents of data objects and interpret them according to their data type. You declare data objects either statically in the declaration part of an ABAP program (the most important statement for this is DATA), or dynamically at runtime (for example, when you call procedures). As well as fields in the memory area of the program, the program also treats literals like data objects.
ABAP contains the following kinds of data objects
Literals
   Named Data Objects
Predefined Data Objects
Dynamic Data Objects

Data type and Data object

Hi Friends,
        What is the difference between Data type and Data object?
Best Regards,
VRV Singh

hi
good
Each ABAP program define its own data types using the statement.
TYPES dtype TYPE type ...
and declare its own variables or instance attributes of classes using the statement
DATA var {TYPE type} ...
Within the program or a class, you can also define local data types and variables within procedures. Local variables in procedures obscure identically-named variables in the main program or class.
When creating data types and data objects, there are a number of naming convention that also apply for other local program definitions, such as procedures. These are described in detail in the keyword documentation.
The Additions TYPE and LIKE
The additions TYPE type and LIKE dobj are used in various ABAP statements. The additions can have various meanings, depending on the syntax and context.
·        Definition of local types in a program
·        Declaration of data objects
·        Dynamic creation of data objects
·        Specification of the type of formal parameters in subroutines
·        Specification of the type of formal parameters in methods
·        Specification of the type of field symbols
Constructing New Data Types
The TYPE addition allows you to construct new data types in the TYPES, DATA; CONSTANTS; and STATICSstatements. In the TYPES statement, these are local data types in the program. In the other statements, they are attributes of new data objects, meaning that the newly defined data types are not free-standing. Rather, they are linked to database objects.This means that you can refer to them using the LIKEaddition, but not using TYPE.
To construct new data types, the addition TYPE can be used with the following type constructors:
·        Construction of reference types
REF TO type|dobj
·        Construction of structured data types
BEGIN OF struc_type.
END OF struc_type.
·        Construction of table types
tabkind OF linetype
These data types only exist during the runtime of the ABAP program.
Referring to Known Data Types or Data Objects
Using the additions TYPE or LIKE in the TYPESstatement, local data types in a program can be referred to known data types or data objects. This is mainly the case with user-defined elementary data types. If you declare variables using the additions TYPE type or LIKE dobj with statement DATA, the data type of var is already fully defined before the declaration is made.
The known types or data that are referred to must be visible at the point where the data type or variable is declared.
A known data type can be any of the following:
·        A predefined ABAP type to which you refer using the TYPE addition
·        An existing local data type in the program to which you refer using the TYPE addition
·        The data type of a local data object in the program to which you refer using the LIKE addition
·        A data type in the ABAP Dictionary to which you refer using the TYPE addition. To ensure compatibility with earlier releases, it is still possible to use the LIKE addition to refer to database tables and flat structures in the ABAP Dictionary. However, you should use the TYPE addition in new programs.
The LIKE addition takes its technical attributes from a visible data object. As a rule, you can use LIKE to refer to any object that has been declared using DATA or a similar statement, and is visible in the current context. The data object only has to have been declared. It is irrelevant whether the data object already exists in memory when you make the LIKE reference.
·        In principle, the local data objects in the same program are visible. As with local data types, there is a difference between local data objects in procedures and global data objects. Data objects defined in a procedure obscure other objects with the same name that are declared in the global declarations of the program.
·        You can also refer to the data objects of other visible ABAP programs. These might be, for example, the visible attributes of global classes in class pools. If a global class cl_lobal has a public instance attribute or static attribute attr, you can refer to it as follows in any ABAP program:
DATA dref TYPE REF TO cl_global.
DATA: f1 LIKE cl_global=>attr,
       f2 LIKE dref->attr.
You can access the technical properties of an instance attribute using the class name and a reference variable without first having to create an object. The properties of the attributes of a class are not instance-specific and belong to the static properties of the class.
http://help.sap.com/saphelp_nw2004s/helpdata/en/fc/eb2ff3358411d1829f0000e829fbfe/content.htm
thanks
mrutyun^

SQL DM - Data Transformation and Data Movement option ?

SQL DM - Data Transformation and Data Movement option ?
I am using SQL DM 3.0.0.665. I need your thoughts on following.
We find that Erwin introduced Data Transformation and Data Movement functionality to support ETL need. We were able to generate ETL spec using this feature.
Does SQL DM have any plan to introduce such features?
How do we use the current SQL DM to build ETL spec ?
Thanks in helping us out.

Hello,
I am currently experimenting with SQL Data Modeler to produce high level solution designs and ETL specifications.
Have not completed what I am doing but so far have come up with the following:
Current assumption I am working on:
All objects specified within the SQL Data Modeler will export to the Reporting Schema tables set up in an Oracle database. Once the data is within these tables then it will be a simple task to develop a SQL report to extract the data in any format required.
1) There is nothing in the physical (Relational) Model section that supports this
- though I have yet to fully use the Dimensional Modelling functionality which may have the mapping functionality required to specify an ETL
2) We need diagrams of the processes as well as the ETL mapping
- Process modelling is available in the Logical
- Reverse Engineer all Physical objects to become Logical object i.e. one Table to one Entity
- For each Entity set up an Information Structure
(Currently this can only be done in a convoluted method via creating a diagram, creating a Flow and editing the Flow then drilling down)
MESSAGE to SQL Data Modeler Support: Can things be set up so that Information Structures can be set up directly from the Browser, current method is a bit nonsensical
- You are now set up to use the Logical Process Modeling functionality to capture the ETL requirements
- Advise that you reference the training to understand what primitive, composite and transformation processes objects are
- Also, take the time to understand what an external agent object is
- Will assume you know what a Data Store is
Here is the standard I am heading towards that seems feasible, will need to run a proof of concept within the larger team to ensure it works though:
- A Logical is kept that is a one for one with the Physical
(The only reason for this is that there is no process modeling functionality for the Physical objects
MESSAGE to SQL Data Modeler Support: Can you duplicate the Process Modeling for the Logical to be available for the Physical objects too, would be a great help to specify ETL jobs.
- An External Agent is used to represent an external source e.g. Billing application
- A primitive process is used to represent the high Level design
- A composite process is used to specify processes which can be further broken down to ETL jobs
- A transformation process is used to represent an ETL job
Within a Transformation process you can specify the mapping from multiple sources to a target table
There are some negatives to this approach:
- You lose the physical schemas the tables are part of, though a naming convention will get round this
- You need to maintain a logical that is one for one with the physical, this is not a big overhead
However, as I have stated in my message to the SQL Data Modeler support team, would all be resolved if the Process Modeling functionality were also made available within the Physical objects environment.
Please note that we have not as yet adopted the above approach and are still assessing is SQL Data Modeler will meet this requirement to our satisfaction. The critical bit will be if the data exports to the Reporting Schema, if it does then we have plenty of SQL resource that can produce the reports required procided the data can be captured.
Hope that all helps.
Also, hope I have not missed the point of your email.
Kind regards,
Yusef

Difference between "Data replication", "Data Cloning", "Data duplication" and "Data Migration"

Hi Gurus,
Can anyone tell me the difference between "Data replication", "Data Cloning", "Data duplication" and "Data Migration". I have gone through Google but doesn't find any appropriate answer for that where I can find the difference.
It would be highly appreciated if you give me a link for all and give me some point out.
Thanks & Regards
Nimai Karmakar

Here is how I see the terms used and understood by most folks
"Data replication"
This is the keeping the same data in sync in 2 different databases. Replication is the process of keeping data in sync between 2 environments/databases and not limited to Oracle to Oracle, it could be Oracle to MySQL to be kept in sync, MySQL to Oracle, Oracle to SQL Server, SQL Server to Oracle. The purpose of keeping data in sync can vary, but that is basic description of what it is.
"Data Cloning"
Make a copy of the data/database from one database environment to another, like for example taking production database and cloning the database to a pre-production database/environment for testing. Coning term is used more when copying a database not just data, but the whole database so typically you hear the reference "Database Cloning", but data cloning is basically the making a copy of the data from one place to another. Sometimes Cloning and Duplicating are used in the same way by folks as the basic end result is the same you are making a copy of the data to someplace else.
"Data duplication"
This is typically term when duplicating the data from one environment to another for a particular purpose, a lot of folks use "Data/Database Cloning" and "Data Duplication" in the same context, meaning they use them to mean the same thing, but I see more difference in the terms so when they are different Data Duplication is done when combining 2 databases to 1 therefore you can not clone the 2 databases into one so this term would be used more in those circumstances.
"Data Migration"
Moving data from one location/database to another location database, for example moving from MySQL to Oracle you would do a data migration from MySQL to Oracle as you are moving the data from MySQL to Oracle and going to leave it in Oracle. You could also be migrating to from Oracle 10g environment to a new Oracle 11g environment, therefore "Migration" is typically used when referring to moving the data from one environment to another and the source and target are different in location, database vendor, database version.
These are very simple ways of looking at the terms from my experience on how they are used.

Data dictionary and data source

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