ABAP Select data from SAP table ISSR_LOANS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISSR_LOANS
*  INTO TABLE @DATA(IT_ISSR_LOANS2).
*--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_ISSR_LOANS INDEX 1 INTO DATA(WA_ISSR_LOANS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISSR_LOANS>-MANDT = 1.
<ISSR_LOANS>-BUKRS = 1.
<ISSR_LOANS>-RBELKPFD = 1.
<ISSR_LOANS>-SANLF = 1.
<ISSR_LOANS>-RANL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISSR_LOANS-SBLART, sy-vline,
  WA_ISSR_LOANS-DBLDAT, sy-vline,
  WA_ISSR_LOANS-DBUDAT, sy-vline,
  WA_ISSR_LOANS-DVALUT, sy-vline,
  WA_ISSR_LOANS-DGJAHR, sy-vline,
  WA_ISSR_LOANS-DMONAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISSR_LOANS 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_ISSR_LOANS 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_ISSR_LOANS INTO WA_ISSR_LOANS.


*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 RBELKPFD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISSR_LOANS-RBELKPFD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISSR_LOANS-RBELKPFD.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field DGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISSR_LOANS-DGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISSR_LOANS-DGJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RDARNEHM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISSR_LOANS-RDARNEHM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISSR_LOANS-RDARNEHM.
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_ISSR_LOANS_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
RBELKPFD TYPE STRING,
SANLF TYPE STRING,
RANL TYPE STRING,
SBLART TYPE STRING,
DBLDAT TYPE STRING,
DBUDAT TYPE STRING,
DVALUT TYPE STRING,
DGJAHR TYPE STRING,
DMONAT TYPE STRING,
SSTORNO TYPE STRING,
RSTBLG TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RPNNR TYPE STRING,
RVZBLG TYPE STRING,
RUMBLG TYPE STRING,
RPOSNR TYPE STRING,
SBEWART TYPE STRING,
BNWHR TYPE STRING,
SNWHR TYPE STRING,
BBWHR TYPE STRING,
SBWHR TYPE STRING,
BCWHR TYPE STRING,
SCWHR TYPE STRING,
BHWHR TYPE STRING,
SSOLHAB TYPE STRING,
RSOLL TYPE STRING,
RHABEN TYPE STRING,
RPARTNR TYPE STRING,
SBUCHA TYPE STRING,
RDARNEHM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISSR_LOANS_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_ISSR_LOANS_STR-MANDT sy-vline 
WA_ISSR_LOANS_STR-BUKRS sy-vline 
WA_ISSR_LOANS_STR-RBELKPFD sy-vline 
WA_ISSR_LOANS_STR-SANLF sy-vline 
WA_ISSR_LOANS_STR-RANL sy-vline 
WA_ISSR_LOANS_STR-SBLART sy-vline 
WA_ISSR_LOANS_STR-DBLDAT sy-vline 
WA_ISSR_LOANS_STR-DBUDAT sy-vline 
WA_ISSR_LOANS_STR-DVALUT sy-vline 
WA_ISSR_LOANS_STR-DGJAHR sy-vline 
WA_ISSR_LOANS_STR-DMONAT sy-vline 
WA_ISSR_LOANS_STR-SSTORNO sy-vline 
WA_ISSR_LOANS_STR-RSTBLG sy-vline 
WA_ISSR_LOANS_STR-RERF sy-vline 
WA_ISSR_LOANS_STR-DERF sy-vline 
WA_ISSR_LOANS_STR-TERF sy-vline 
WA_ISSR_LOANS_STR-REHER sy-vline 
WA_ISSR_LOANS_STR-RPNNR sy-vline 
WA_ISSR_LOANS_STR-RVZBLG sy-vline 
WA_ISSR_LOANS_STR-RUMBLG sy-vline 
WA_ISSR_LOANS_STR-RPOSNR sy-vline 
WA_ISSR_LOANS_STR-SBEWART sy-vline 
WA_ISSR_LOANS_STR-BNWHR sy-vline 
WA_ISSR_LOANS_STR-SNWHR sy-vline 
WA_ISSR_LOANS_STR-BBWHR sy-vline 
WA_ISSR_LOANS_STR-SBWHR sy-vline 
WA_ISSR_LOANS_STR-BCWHR sy-vline 
WA_ISSR_LOANS_STR-SCWHR sy-vline 
WA_ISSR_LOANS_STR-BHWHR sy-vline 
WA_ISSR_LOANS_STR-SSOLHAB sy-vline 
WA_ISSR_LOANS_STR-RSOLL sy-vline 
WA_ISSR_LOANS_STR-RHABEN sy-vline 
WA_ISSR_LOANS_STR-RPARTNR sy-vline 
WA_ISSR_LOANS_STR-SBUCHA sy-vline 
WA_ISSR_LOANS_STR-RDARNEHM sy-vline      INTO ld_text SEPARATED BY SPACE.

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