ABAP Select data from SAP table FGLV_MIG_0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FGLV_MIG_0 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 FGLV_MIG_0. 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 FGLV_MIG_0 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_FGLV_MIG_0 TYPE STANDARD TABLE OF FGLV_MIG_0,
      WA_FGLV_MIG_0 TYPE FGLV_MIG_0,
      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: <FGLV_MIG_0> TYPE FGLV_MIG_0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FGLV_MIG_0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FGLV_MIG_0
  INTO TABLE IT_FGLV_MIG_0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FGLV_MIG_0
*  INTO TABLE @DATA(IT_FGLV_MIG_02).
*--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_FGLV_MIG_0 INDEX 1 INTO DATA(WA_FGLV_MIG_02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FGLV_MIG_0 ASSIGNING <FGLV_MIG_0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FGLV_MIG_0>-RCLNT = 1.
<FGLV_MIG_0>-RYEAR = 1.
<FGLV_MIG_0>-DRCRK = 1.
<FGLV_MIG_0>-POPER = 1.
<FGLV_MIG_0>-RTCUR = 1.

ENDLOOP.

LOOP AT IT_FGLV_MIG_0 INTO WA_FGLV_MIG_0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FGLV_MIG_0-RLDNR, sy-vline,
  WA_FGLV_MIG_0-RRCTY, sy-vline,
  WA_FGLV_MIG_0-RACCT, sy-vline,
  WA_FGLV_MIG_0-RBUKRS, sy-vline,
  WA_FGLV_MIG_0-RBUSA, sy-vline,
  WA_FGLV_MIG_0-TSL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FGLV_MIG_0 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_FGLV_MIG_0 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_FGLV_MIG_0 INTO WA_FGLV_MIG_0.


*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 GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FGLV_MIG_0-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGLV_MIG_0-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FGLV_MIG_0-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGLV_MIG_0-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FGLV_MIG_0-RACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGLV_MIG_0-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_FGLV_MIG_0_STR, 
RCLNT TYPE STRING,
RYEAR TYPE STRING,
DRCRK TYPE STRING,
POPER TYPE STRING,
RTCUR TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RACCT TYPE STRING,
RBUKRS TYPE STRING,
RBUSA TYPE STRING,
TSL TYPE STRING,
HSL TYPE STRING,
KSL TYPE STRING,
OSL TYPE STRING,
MSL TYPE STRING,
VSL TYPE STRING,
BSL TYPE STRING,
CSL TYPE STRING,
DSL TYPE STRING,
ESL TYPE STRING,
FSL TYPE STRING,
GSL TYPE STRING,
GLACCOUNT_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FGLV_MIG_0_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_FGLV_MIG_0_STR-RCLNT sy-vline 
WA_FGLV_MIG_0_STR-RYEAR sy-vline 
WA_FGLV_MIG_0_STR-DRCRK sy-vline 
WA_FGLV_MIG_0_STR-POPER sy-vline 
WA_FGLV_MIG_0_STR-RTCUR sy-vline 
WA_FGLV_MIG_0_STR-RLDNR sy-vline 
WA_FGLV_MIG_0_STR-RRCTY sy-vline 
WA_FGLV_MIG_0_STR-RACCT sy-vline 
WA_FGLV_MIG_0_STR-RBUKRS sy-vline 
WA_FGLV_MIG_0_STR-RBUSA sy-vline 
WA_FGLV_MIG_0_STR-TSL sy-vline 
WA_FGLV_MIG_0_STR-HSL sy-vline 
WA_FGLV_MIG_0_STR-KSL sy-vline 
WA_FGLV_MIG_0_STR-OSL sy-vline 
WA_FGLV_MIG_0_STR-MSL sy-vline 
WA_FGLV_MIG_0_STR-VSL sy-vline 
WA_FGLV_MIG_0_STR-BSL sy-vline 
WA_FGLV_MIG_0_STR-CSL sy-vline 
WA_FGLV_MIG_0_STR-DSL sy-vline 
WA_FGLV_MIG_0_STR-ESL sy-vline 
WA_FGLV_MIG_0_STR-FSL sy-vline 
WA_FGLV_MIG_0_STR-GSL sy-vline 
WA_FGLV_MIG_0_STR-GLACCOUNT_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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