ABAP Select data from SAP table EABLH_ALV_UNIT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EABLH_ALV_UNIT 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 EABLH_ALV_UNIT. 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 EABLH_ALV_UNIT 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_EABLH_ALV_UNIT TYPE STANDARD TABLE OF EABLH_ALV_UNIT,
      WA_EABLH_ALV_UNIT TYPE EABLH_ALV_UNIT,
      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: <EABLH_ALV_UNIT> TYPE EABLH_ALV_UNIT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EABLH_ALV_UNIT
*  INTO TABLE @DATA(IT_EABLH_ALV_UNIT2).
*--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_EABLH_ALV_UNIT INDEX 1 INTO DATA(WA_EABLH_ALV_UNIT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EABLH_ALV_UNIT>-ABLEINH = 1.
<EABLH_ALV_UNIT>-ADATSOLL = 1.
<EABLH_ALV_UNIT>-BEGABL = 1.
<EABLH_ALV_UNIT>-CONPLAN = 1.
<EABLH_ALV_UNIT>-CONACTUAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EABLH_ALV_UNIT-CONBILLED, sy-vline,
  WA_EABLH_ALV_UNIT-CONBILLAB, sy-vline,
  WA_EABLH_ALV_UNIT-CONPREPAR, sy-vline,
  WA_EABLH_ALV_UNIT-CONSUPPRES, sy-vline,
  WA_EABLH_ALV_UNIT-READPLAN, sy-vline,
  WA_EABLH_ALV_UNIT-READACTUAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EABLH_ALV_UNIT 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_EABLH_ALV_UNIT 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_EABLH_ALV_UNIT INTO WA_EABLH_ALV_UNIT.


*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_EABLH_ALV_UNIT_STR, 
ABLEINH TYPE STRING,
ADATSOLL TYPE STRING,
BEGABL TYPE STRING,
CONPLAN TYPE STRING,
CONACTUAL TYPE STRING,
CONBILLED TYPE STRING,
CONBILLAB TYPE STRING,
CONPREPAR TYPE STRING,
CONSUPPRES TYPE STRING,
READPLAN TYPE STRING,
READACTUAL TYPE STRING,
READVALID TYPE STRING,
READINVALI TYPE STRING,
READPREPAR TYPE STRING,
ABLESGR TYPE STRING,
ABRVORG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EABLH_ALV_UNIT_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_EABLH_ALV_UNIT_STR-ABLEINH sy-vline 
WA_EABLH_ALV_UNIT_STR-ADATSOLL sy-vline 
WA_EABLH_ALV_UNIT_STR-BEGABL sy-vline 
WA_EABLH_ALV_UNIT_STR-CONPLAN sy-vline 
WA_EABLH_ALV_UNIT_STR-CONACTUAL sy-vline 
WA_EABLH_ALV_UNIT_STR-CONBILLED sy-vline 
WA_EABLH_ALV_UNIT_STR-CONBILLAB sy-vline 
WA_EABLH_ALV_UNIT_STR-CONPREPAR sy-vline 
WA_EABLH_ALV_UNIT_STR-CONSUPPRES sy-vline 
WA_EABLH_ALV_UNIT_STR-READPLAN sy-vline 
WA_EABLH_ALV_UNIT_STR-READACTUAL sy-vline 
WA_EABLH_ALV_UNIT_STR-READVALID sy-vline 
WA_EABLH_ALV_UNIT_STR-READINVALI sy-vline 
WA_EABLH_ALV_UNIT_STR-READPREPAR sy-vline 
WA_EABLH_ALV_UNIT_STR-ABLESGR sy-vline 
WA_EABLH_ALV_UNIT_STR-ABRVORG sy-vline      INTO ld_text SEPARATED BY SPACE.

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