ABAP Select data from SAP table V_MLFI_CONS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MLFI_CONS
*  INTO TABLE @DATA(IT_V_MLFI_CONS2).
*--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_V_MLFI_CONS INDEX 1 INTO DATA(WA_V_MLFI_CONS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MLFI_CONS>-MANDT = 1.
<V_MLFI_CONS>-RLDNR = 1.
<V_MLFI_CONS>-KTOSL = 1.
<V_MLFI_CONS>-RACCT = 1.
<V_MLFI_CONS>-KALNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MLFI_CONS-MATNR, sy-vline,
  WA_V_MLFI_CONS-BWKEY, sy-vline,
  WA_V_MLFI_CONS-BWTAR, sy-vline,
  WA_V_MLFI_CONS-PRCTR, sy-vline,
  WA_V_MLFI_CONS-HSALK3, sy-vline,
  WA_V_MLFI_CONS-HSALK3_ML, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MLFI_CONS 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_V_MLFI_CONS 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_V_MLFI_CONS INTO WA_V_MLFI_CONS.


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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_MLFI_CONS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MLFI_CONS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_MLFI_CONS-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MLFI_CONS-PRCTR.
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_V_MLFI_CONS_STR, 
MANDT TYPE STRING,
RLDNR TYPE STRING,
KTOSL TYPE STRING,
RACCT TYPE STRING,
KALNR TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
PRCTR TYPE STRING,
HSALK3 TYPE STRING,
HSALK3_ML TYPE STRING,
H_DIFF TYPE STRING,
RHCUR TYPE STRING,
KSALK3 TYPE STRING,
KSALK3_ML TYPE STRING,
K_DIFF TYPE STRING,
RKCUR TYPE STRING,
OSALK3 TYPE STRING,
OSALK3_ML TYPE STRING,
O_DIFF TYPE STRING,
ROCUR TYPE STRING,
VSALK3 TYPE STRING,
VSALK3_ML TYPE STRING,
V_DIFF TYPE STRING,
RVCUR TYPE STRING,
BSALK3 TYPE STRING,
BSALK3_ML TYPE STRING,
B_DIFF TYPE STRING,
RBCUR TYPE STRING,
CSALK3 TYPE STRING,
CSALK3_ML TYPE STRING,
C_DIFF TYPE STRING,
RCCUR TYPE STRING,
DSALK3 TYPE STRING,
DSALK3_ML TYPE STRING,
D_DIFF TYPE STRING,
RDCUR TYPE STRING,
ESALK3 TYPE STRING,
ESALK3_ML TYPE STRING,
E_DIFF TYPE STRING,
RECUR TYPE STRING,
FSALK3 TYPE STRING,
FSALK3_ML TYPE STRING,
F_DIFF TYPE STRING,
RFCUR TYPE STRING,
GSALK3 TYPE STRING,
GSALK3_ML TYPE STRING,
G_DIFF TYPE STRING,
RGCUR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MLFI_CONS_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_V_MLFI_CONS_STR-MANDT sy-vline 
WA_V_MLFI_CONS_STR-RLDNR sy-vline 
WA_V_MLFI_CONS_STR-KTOSL sy-vline 
WA_V_MLFI_CONS_STR-RACCT sy-vline 
WA_V_MLFI_CONS_STR-KALNR sy-vline 
WA_V_MLFI_CONS_STR-MATNR sy-vline 
WA_V_MLFI_CONS_STR-BWKEY sy-vline 
WA_V_MLFI_CONS_STR-BWTAR sy-vline 
WA_V_MLFI_CONS_STR-PRCTR sy-vline 
WA_V_MLFI_CONS_STR-HSALK3 sy-vline 
WA_V_MLFI_CONS_STR-HSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-H_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RHCUR sy-vline 
WA_V_MLFI_CONS_STR-KSALK3 sy-vline 
WA_V_MLFI_CONS_STR-KSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-K_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RKCUR sy-vline 
WA_V_MLFI_CONS_STR-OSALK3 sy-vline 
WA_V_MLFI_CONS_STR-OSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-O_DIFF sy-vline 
WA_V_MLFI_CONS_STR-ROCUR sy-vline 
WA_V_MLFI_CONS_STR-VSALK3 sy-vline 
WA_V_MLFI_CONS_STR-VSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-V_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RVCUR sy-vline 
WA_V_MLFI_CONS_STR-BSALK3 sy-vline 
WA_V_MLFI_CONS_STR-BSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-B_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RBCUR sy-vline 
WA_V_MLFI_CONS_STR-CSALK3 sy-vline 
WA_V_MLFI_CONS_STR-CSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-C_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RCCUR sy-vline 
WA_V_MLFI_CONS_STR-DSALK3 sy-vline 
WA_V_MLFI_CONS_STR-DSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-D_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RDCUR sy-vline 
WA_V_MLFI_CONS_STR-ESALK3 sy-vline 
WA_V_MLFI_CONS_STR-ESALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-E_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RECUR sy-vline 
WA_V_MLFI_CONS_STR-FSALK3 sy-vline 
WA_V_MLFI_CONS_STR-FSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-F_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RFCUR sy-vline 
WA_V_MLFI_CONS_STR-GSALK3 sy-vline 
WA_V_MLFI_CONS_STR-GSALK3_ML sy-vline 
WA_V_MLFI_CONS_STR-G_DIFF sy-vline 
WA_V_MLFI_CONS_STR-RGCUR sy-vline      INTO ld_text SEPARATED BY SPACE.

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