ABAP Select data from SAP table ISALLOCATIONTAGTP1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISALLOCATIONTAGTP1 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ISALLOCATIONTAGTP1. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ISALLOCATIONTAGTP1 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ISALLOCATIONTAGTP1 TYPE STANDARD TABLE OF ISALLOCATIONTAGTP1,
      WA_ISALLOCATIONTAGTP1 TYPE ISALLOCATIONTAGTP1,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ISALLOCATIONTAGTP1> TYPE ISALLOCATIONTAGTP1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISALLOCATIONTAGTP1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISALLOCATIONTAGTP1
  INTO TABLE IT_ISALLOCATIONTAGTP1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISALLOCATIONTAGTP1
*  INTO TABLE @DATA(IT_ISALLOCATIONTAGTP12).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ISALLOCATIONTAGTP1 INDEX 1 INTO DATA(WA_ISALLOCATIONTAGTP12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISALLOCATIONTAGTP1 ASSIGNING <ISALLOCATIONTAGTP1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISALLOCATIONTAGTP1>-KEY = 1.
<ISALLOCATIONTAGTP1>-PARENT_KEY = 1.
<ISALLOCATIONTAGTP1>-ROOT_KEY = 1.
<ISALLOCATIONTAGTP1>-ALLOCATIONTAGID = 1.
<ISALLOCATIONTAGTP1>-ALLOCATIONTAGCREATEDBYUSER = 1.

ENDLOOP.

LOOP AT IT_ISALLOCATIONTAGTP1 INTO WA_ISALLOCATIONTAGTP1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISALLOCATIONTAGTP1-ALLOCATIONTAGCREATIONDATE, sy-vline,
  WA_ISALLOCATIONTAGTP1-ALLOCATIONTAGCREATIONTIME, sy-vline,
  WA_ISALLOCATIONTAGTP1-ALLOCATIONTAGCHANGEDBYUSER, sy-vline,
  WA_ISALLOCATIONTAGTP1-ALLOCATIONTAGLASTCHANGEDATE, sy-vline,
  WA_ISALLOCATIONTAGTP1-ALLOCATIONTAGLASTCHANGETIME, sy-vline,
  WA_ISALLOCATIONTAGTP1-ALLOCATIONTAGDESCRIPTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISALLOCATIONTAGTP1 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ISALLOCATIONTAGTP1 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ISALLOCATIONTAGTP1 INTO WA_ISALLOCATIONTAGTP1.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISALLOCATIONTAGTP1_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
ALLOCATIONTAGID TYPE STRING,
ALLOCATIONTAGCREATEDBYUSER TYPE STRING,
ALLOCATIONTAGCREATIONDATE TYPE STRING,
ALLOCATIONTAGCREATIONTIME TYPE STRING,
ALLOCATIONTAGCHANGEDBYUSER TYPE STRING,
ALLOCATIONTAGLASTCHANGEDATE TYPE STRING,
ALLOCATIONTAGLASTCHANGETIME TYPE STRING,
ALLOCATIONTAGDESCRIPTION TYPE STRING,
ALLOCATIONTAGNOTE TYPE STRING,
ACTIVEUUID TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISALLOCATIONTAGTP1_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ISALLOCATIONTAGTP1_STR-KEY sy-vline 
WA_ISALLOCATIONTAGTP1_STR-PARENT_KEY sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ROOT_KEY sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGID sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGCREATEDBYUSER sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGCREATIONDATE sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGCREATIONTIME sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGCHANGEDBYUSER sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGLASTCHANGEDATE sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGLASTCHANGETIME sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGDESCRIPTION sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ALLOCATIONTAGNOTE sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ACTIVEUUID sy-vline 
WA_ISALLOCATIONTAGTP1_STR-HASACTIVEENTITY sy-vline 
WA_ISALLOCATIONTAGTP1_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISALLOCATIONTAGTP1_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISALLOCATIONTAGTP1_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISALLOCATIONTAGTP1_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISALLOCATIONTAGTP1_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISALLOCATIONTAGTP1_STR-ISACTIVEENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.