ABAP Select data from SAP table V_MLFI_CONS_AGG 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_AGG 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_AGG. 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_AGG 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_AGG TYPE STANDARD TABLE OF V_MLFI_CONS_AGG,
      WA_V_MLFI_CONS_AGG TYPE V_MLFI_CONS_AGG,
      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_AGG> TYPE V_MLFI_CONS_AGG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MLFI_CONS_AGG
*  INTO TABLE @DATA(IT_V_MLFI_CONS_AGG2).
*--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_AGG INDEX 1 INTO DATA(WA_V_MLFI_CONS_AGG2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MLFI_CONS_AGG-HSALK3, sy-vline,
  WA_V_MLFI_CONS_AGG-HSALK3_ML, sy-vline,
  WA_V_MLFI_CONS_AGG-H_DIFF, sy-vline,
  WA_V_MLFI_CONS_AGG-RHCUR, sy-vline,
  WA_V_MLFI_CONS_AGG-KSALK3, sy-vline,
  WA_V_MLFI_CONS_AGG-KSALK3_ML, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MLFI_CONS_AGG 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_AGG 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_AGG INTO WA_V_MLFI_CONS_AGG.


*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_AGG-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MLFI_CONS_AGG-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_AGG-RACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MLFI_CONS_AGG-RACCT.
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_AGG_STR, 
MANDT TYPE STRING,
RLDNR TYPE STRING,
RACCT TYPE STRING,
KTOSL TYPE STRING,
BWKEY 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_AGG_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_AGG_STR-MANDT sy-vline 
WA_V_MLFI_CONS_AGG_STR-RLDNR sy-vline 
WA_V_MLFI_CONS_AGG_STR-RACCT sy-vline 
WA_V_MLFI_CONS_AGG_STR-KTOSL sy-vline 
WA_V_MLFI_CONS_AGG_STR-BWKEY sy-vline 
WA_V_MLFI_CONS_AGG_STR-HSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-HSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-H_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RHCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-KSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-KSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-K_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RKCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-OSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-OSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-O_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-ROCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-VSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-VSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-V_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RVCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-BSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-BSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-B_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RBCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-CSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-CSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-C_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RCCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-DSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-DSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-D_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RDCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-ESALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-ESALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-E_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RECUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-FSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-FSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-F_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_STR-RFCUR sy-vline 
WA_V_MLFI_CONS_AGG_STR-GSALK3 sy-vline 
WA_V_MLFI_CONS_AGG_STR-GSALK3_ML sy-vline 
WA_V_MLFI_CONS_AGG_STR-G_DIFF sy-vline 
WA_V_MLFI_CONS_AGG_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.