ABAP Select data from SAP table INSSAC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INSSAC
*  INTO TABLE @DATA(IT_INSSAC2).
*--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_INSSAC INDEX 1 INTO DATA(WA_INSSAC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INSSAC>-SCC01 = 1.
<INSSAC>-SCT01 = 1.
<INSSAC>-SPR01 = 1.
<INSSAC>-SCN01 = 1.
<INSSAC>-SRM01 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INSSAC-SNF01, sy-vline,
  WA_INSSAC-SCC02, sy-vline,
  WA_INSSAC-SCT02, sy-vline,
  WA_INSSAC-SPR02, sy-vline,
  WA_INSSAC-SCN02, sy-vline,
  WA_INSSAC-SRM02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INSSAC 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_INSSAC 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_INSSAC INTO WA_INSSAC.


*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_INSSAC_STR, 
SCC01 TYPE STRING,
SCT01 TYPE STRING,
SPR01 TYPE STRING,
SCN01 TYPE STRING,
SRM01 TYPE STRING,
SNF01 TYPE STRING,
SCC02 TYPE STRING,
SCT02 TYPE STRING,
SPR02 TYPE STRING,
SCN02 TYPE STRING,
SRM02 TYPE STRING,
SNF02 TYPE STRING,
SCC03 TYPE STRING,
SCT03 TYPE STRING,
SPR03 TYPE STRING,
SCN03 TYPE STRING,
SRM03 TYPE STRING,
SNF03 TYPE STRING,
SCC04 TYPE STRING,
SCT04 TYPE STRING,
SPR04 TYPE STRING,
SCN04 TYPE STRING,
SRM04 TYPE STRING,
SNF04 TYPE STRING,
SCC05 TYPE STRING,
SCT05 TYPE STRING,
SPR05 TYPE STRING,
SCN05 TYPE STRING,
SRM05 TYPE STRING,
SNF05 TYPE STRING,
SAF01 TYPE STRING,
SAF02 TYPE STRING,
SAF03 TYPE STRING,
SAF04 TYPE STRING,
SAF05 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INSSAC_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_INSSAC_STR-SCC01 sy-vline 
WA_INSSAC_STR-SCT01 sy-vline 
WA_INSSAC_STR-SPR01 sy-vline 
WA_INSSAC_STR-SCN01 sy-vline 
WA_INSSAC_STR-SRM01 sy-vline 
WA_INSSAC_STR-SNF01 sy-vline 
WA_INSSAC_STR-SCC02 sy-vline 
WA_INSSAC_STR-SCT02 sy-vline 
WA_INSSAC_STR-SPR02 sy-vline 
WA_INSSAC_STR-SCN02 sy-vline 
WA_INSSAC_STR-SRM02 sy-vline 
WA_INSSAC_STR-SNF02 sy-vline 
WA_INSSAC_STR-SCC03 sy-vline 
WA_INSSAC_STR-SCT03 sy-vline 
WA_INSSAC_STR-SPR03 sy-vline 
WA_INSSAC_STR-SCN03 sy-vline 
WA_INSSAC_STR-SRM03 sy-vline 
WA_INSSAC_STR-SNF03 sy-vline 
WA_INSSAC_STR-SCC04 sy-vline 
WA_INSSAC_STR-SCT04 sy-vline 
WA_INSSAC_STR-SPR04 sy-vline 
WA_INSSAC_STR-SCN04 sy-vline 
WA_INSSAC_STR-SRM04 sy-vline 
WA_INSSAC_STR-SNF04 sy-vline 
WA_INSSAC_STR-SCC05 sy-vline 
WA_INSSAC_STR-SCT05 sy-vline 
WA_INSSAC_STR-SPR05 sy-vline 
WA_INSSAC_STR-SCN05 sy-vline 
WA_INSSAC_STR-SRM05 sy-vline 
WA_INSSAC_STR-SNF05 sy-vline 
WA_INSSAC_STR-SAF01 sy-vline 
WA_INSSAC_STR-SAF02 sy-vline 
WA_INSSAC_STR-SAF03 sy-vline 
WA_INSSAC_STR-SAF04 sy-vline 
WA_INSSAC_STR-SAF05 sy-vline      INTO ld_text SEPARATED BY SPACE.

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