ABAP Select data from SAP table LOIN_S_ACCOUNT_REGISTER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LOIN_S_ACCOUNT_REGISTER
*  INTO TABLE @DATA(IT_LOIN_S_ACCOUNT_REGISTER2).
*--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_LOIN_S_ACCOUNT_REGISTER INDEX 1 INTO DATA(WA_LOIN_S_ACCOUNT_REGISTER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LOIN_S_ACCOUNT_REGISTER>-DUTY = 1.
<LOIN_S_ACCOUNT_REGISTER>-ACNAM = 1.
<LOIN_S_ACCOUNT_REGISTER>-ACBAL = 1.
<LOIN_S_ACCOUNT_REGISTER>-CURRENCY = 1.
<LOIN_S_ACCOUNT_REGISTER>-UTLZE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LOIN_S_ACCOUNT_REGISTER-RMBAL, sy-vline,
  WA_LOIN_S_ACCOUNT_REGISTER-COMPANYCODE, sy-vline,
  WA_LOIN_S_ACCOUNT_REGISTER-EXCGRP, sy-vline,
  WA_LOIN_S_ACCOUNT_REGISTER-WERKS, sy-vline,
  WA_LOIN_S_ACCOUNT_REGISTER-BUDAT, sy-vline,
  WA_LOIN_S_ACCOUNT_REGISTER-REGACCTNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LOIN_S_ACCOUNT_REGISTER 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_LOIN_S_ACCOUNT_REGISTER 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_LOIN_S_ACCOUNT_REGISTER INTO WA_LOIN_S_ACCOUNT_REGISTER.


*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.

*Conversion exit ALPHA, internal->external for field REGACCTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LOIN_S_ACCOUNT_REGISTER-REGACCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LOIN_S_ACCOUNT_REGISTER-REGACCTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SIMUACCTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LOIN_S_ACCOUNT_REGISTER-SIMUACCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LOIN_S_ACCOUNT_REGISTER-SIMUACCTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GLACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LOIN_S_ACCOUNT_REGISTER-GLACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LOIN_S_ACCOUNT_REGISTER-GLACCOUNT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_LOIN_S_ACCOUNT_REGISTER_STR, 
DUTY TYPE STRING,
ACNAM TYPE STRING,
ACBAL TYPE STRING,
CURRENCY TYPE STRING,
UTLZE TYPE STRING,
RMBAL TYPE STRING,
COMPANYCODE TYPE STRING,
EXCGRP TYPE STRING,
WERKS TYPE STRING,
BUDAT TYPE STRING,
REGACCTNO TYPE STRING,
REGSHKZG TYPE STRING,
REGDESCRPTION TYPE STRING,
SIMUACCTNO TYPE STRING,
SIMUSHKZG TYPE STRING,
SIMUDESCRIPTION TYPE STRING,
GLACCOUNT TYPE STRING,
GLACCOUNTDESC TYPE STRING,
GLPOSTINGAMOUNT TYPE STRING,
GLPOSTINGAMOUNTCURRENCY TYPE STRING,
DEBITCREDITINDICATOR TYPE STRING,
PLAFLAG TYPE STRING,
UTILIZEFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LOIN_S_ACCOUNT_REGISTER_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_LOIN_S_ACCOUNT_REGISTER_STR-DUTY sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-ACNAM sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-ACBAL sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-CURRENCY sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-UTLZE sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-RMBAL sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-COMPANYCODE sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-EXCGRP sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-WERKS sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-BUDAT sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-REGACCTNO sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-REGSHKZG sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-REGDESCRPTION sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-SIMUACCTNO sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-SIMUSHKZG sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-SIMUDESCRIPTION sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-GLACCOUNT sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-GLACCOUNTDESC sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-GLPOSTINGAMOUNT sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-GLPOSTINGAMOUNTCURRENCY sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-DEBITCREDITINDICATOR sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-PLAFLAG sy-vline 
WA_LOIN_S_ACCOUNT_REGISTER_STR-UTILIZEFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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