ABAP Select data from SAP table CNIS_FLG_REQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNIS_FLG_REQ
*  INTO TABLE @DATA(IT_CNIS_FLG_REQ2).
*--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_CNIS_FLG_REQ INDEX 1 INTO DATA(WA_CNIS_FLG_REQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNIS_FLG_REQ>-IMTP = 1.
<CNIS_FLG_REQ>-PSDYPG = 1.
<CNIS_FLG_REQ>-IMPR = 1.
<CNIS_FLG_REQ>-PSDYIP = 1.
<CNIS_FLG_REQ>-PROJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNIS_FLG_REQ-PSDYPD, sy-vline,
  WA_CNIS_FLG_REQ-PRPS_R, sy-vline,
  WA_CNIS_FLG_REQ-PSDYPR, sy-vline,
  WA_CNIS_FLG_REQ-PSMERK, sy-vline,
  WA_CNIS_FLG_REQ-PRTE, sy-vline,
  WA_CNIS_FLG_REQ-PSMLST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNIS_FLG_REQ 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_CNIS_FLG_REQ 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_CNIS_FLG_REQ INTO WA_CNIS_FLG_REQ.


*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_CNIS_FLG_REQ_STR, 
IMTP TYPE STRING,
PSDYPG TYPE STRING,
IMPR TYPE STRING,
PSDYIP TYPE STRING,
PROJ TYPE STRING,
PSDYPD TYPE STRING,
PRPS_R TYPE STRING,
PSDYPR TYPE STRING,
PSMERK TYPE STRING,
PRTE TYPE STRING,
PSMLST TYPE STRING,
PSTX TYPE STRING,
DRAD TYPE STRING,
VBAK TYPE STRING,
PSDYVK TYPE STRING,
VBAP TYPE STRING,
PSDYVB TYPE STRING,
PLAF TYPE STRING,
RESB04 TYPE STRING,
KBED04 TYPE STRING,
AUFK TYPE STRING,
AFKO TYPE STRING,
AFPO TYPE STRING,
PSDYNP TYPE STRING,
ACT01 TYPE STRING,
PSDYNV TYPE STRING,
AFAB01 TYPE STRING,
MLSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNIS_FLG_REQ_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_CNIS_FLG_REQ_STR-IMTP sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYPG sy-vline 
WA_CNIS_FLG_REQ_STR-IMPR sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYIP sy-vline 
WA_CNIS_FLG_REQ_STR-PROJ sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYPD sy-vline 
WA_CNIS_FLG_REQ_STR-PRPS_R sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYPR sy-vline 
WA_CNIS_FLG_REQ_STR-PSMERK sy-vline 
WA_CNIS_FLG_REQ_STR-PRTE sy-vline 
WA_CNIS_FLG_REQ_STR-PSMLST sy-vline 
WA_CNIS_FLG_REQ_STR-PSTX sy-vline 
WA_CNIS_FLG_REQ_STR-DRAD sy-vline 
WA_CNIS_FLG_REQ_STR-VBAK sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYVK sy-vline 
WA_CNIS_FLG_REQ_STR-VBAP sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYVB sy-vline 
WA_CNIS_FLG_REQ_STR-PLAF sy-vline 
WA_CNIS_FLG_REQ_STR-RESB04 sy-vline 
WA_CNIS_FLG_REQ_STR-KBED04 sy-vline 
WA_CNIS_FLG_REQ_STR-AUFK sy-vline 
WA_CNIS_FLG_REQ_STR-AFKO sy-vline 
WA_CNIS_FLG_REQ_STR-AFPO sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYNP sy-vline 
WA_CNIS_FLG_REQ_STR-ACT01 sy-vline 
WA_CNIS_FLG_REQ_STR-PSDYNV sy-vline 
WA_CNIS_FLG_REQ_STR-AFAB01 sy-vline 
WA_CNIS_FLG_REQ_STR-MLSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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