ABAP Select data from SAP table ERESOL_CUST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERESOL_CUST
*  INTO TABLE @DATA(IT_ERESOL_CUST2).
*--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_ERESOL_CUST INDEX 1 INTO DATA(WA_ERESOL_CUST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERESOL_CUST>-MANDT = 1.
<ERESOL_CUST>-CVAR = 1.
<ERESOL_CUST>-BP = 1.
<ERESOL_CUST>-TECHGR = 1.
<ERESOL_CUST>-SCENE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERESOL_CUST-CRESDIA1, sy-vline,
  WA_ERESOL_CUST-CRESBTC1, sy-vline,
  WA_ERESOL_CUST-CRESDIA2, sy-vline,
  WA_ERESOL_CUST-CRESBTC2, sy-vline,
  WA_ERESOL_CUST-CRESDIA3, sy-vline,
  WA_ERESOL_CUST-CRESBTC3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERESOL_CUST 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_ERESOL_CUST 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_ERESOL_CUST INTO WA_ERESOL_CUST.


*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_ERESOL_CUST_STR, 
MANDT TYPE STRING,
CVAR TYPE STRING,
BP TYPE STRING,
TECHGR TYPE STRING,
SCENE TYPE STRING,
CRESDIA1 TYPE STRING,
CRESBTC1 TYPE STRING,
CRESDIA2 TYPE STRING,
CRESBTC2 TYPE STRING,
CRESDIA3 TYPE STRING,
CRESBTC3 TYPE STRING,
CRESDIA4 TYPE STRING,
CRESBTC4 TYPE STRING,
CRESDIA5 TYPE STRING,
CRESBTC5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERESOL_CUST_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_ERESOL_CUST_STR-MANDT sy-vline 
WA_ERESOL_CUST_STR-CVAR sy-vline 
WA_ERESOL_CUST_STR-BP sy-vline 
WA_ERESOL_CUST_STR-TECHGR sy-vline 
WA_ERESOL_CUST_STR-SCENE sy-vline 
WA_ERESOL_CUST_STR-CRESDIA1 sy-vline 
WA_ERESOL_CUST_STR-CRESBTC1 sy-vline 
WA_ERESOL_CUST_STR-CRESDIA2 sy-vline 
WA_ERESOL_CUST_STR-CRESBTC2 sy-vline 
WA_ERESOL_CUST_STR-CRESDIA3 sy-vline 
WA_ERESOL_CUST_STR-CRESBTC3 sy-vline 
WA_ERESOL_CUST_STR-CRESDIA4 sy-vline 
WA_ERESOL_CUST_STR-CRESBTC4 sy-vline 
WA_ERESOL_CUST_STR-CRESDIA5 sy-vline 
WA_ERESOL_CUST_STR-CRESBTC5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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