ABAP Select data from SAP table FMLV_INV_BASE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMLV_INV_BASE
*  INTO TABLE @DATA(IT_FMLV_INV_BASE2).
*--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_FMLV_INV_BASE INDEX 1 INTO DATA(WA_FMLV_INV_BASE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMLV_INV_BASE>-RCLNT = 1.
<FMLV_INV_BASE>-RLDNR = 1.
<FMLV_INV_BASE>-RBUKRS = 1.
<FMLV_INV_BASE>-GJAHR = 1.
<FMLV_INV_BASE>-POPER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMLV_INV_BASE-DRCRK, sy-vline,
  WA_FMLV_INV_BASE-PERART, sy-vline,
  WA_FMLV_INV_BASE-FISCYEARPER, sy-vline,
  WA_FMLV_INV_BASE-KOKRS, sy-vline,
  WA_FMLV_INV_BASE-ERKRS, sy-vline,
  WA_FMLV_INV_BASE-KALNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMLV_INV_BASE 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_FMLV_INV_BASE 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_FMLV_INV_BASE INTO WA_FMLV_INV_BASE.


*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_FMLV_INV_BASE-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-RLDNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PERI7, internal->external for field FISCYEARPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_FMLV_INV_BASE-FISCYEARPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-FISCYEARPER.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field MAT_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_FMLV_INV_BASE-MAT_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-MAT_PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSN, internal->external for field MAT_PS_POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_FMLV_INV_BASE-MAT_PS_POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-MAT_PS_POSID.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FMLV_INV_BASE-RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-RUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RVUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FMLV_INV_BASE-RVUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-RVUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RRUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FMLV_INV_BASE-RRUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLV_INV_BASE-RRUNIT.
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_FMLV_INV_BASE_STR, 
RCLNT TYPE STRING,
RLDNR TYPE STRING,
RBUKRS TYPE STRING,
GJAHR TYPE STRING,
POPER TYPE STRING,
DRCRK TYPE STRING,
PERART TYPE STRING,
FISCYEARPER TYPE STRING,
KOKRS TYPE STRING,
ERKRS TYPE STRING,
KALNR TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
KZBWS TYPE STRING,
SOBKZ TYPE STRING,
MAT_KDAUF TYPE STRING,
MAT_KDPOS TYPE STRING,
MAT_PSPNR TYPE STRING,
MAT_LIFNR TYPE STRING,
MAT_PS_POSID TYPE STRING,
KTOSL TYPE STRING,
KOART TYPE STRING,
RACCT TYPE STRING,
KTOPL TYPE STRING,
PERIV TYPE STRING,
WERKS TYPE STRING,
SEGMENT TYPE STRING,
PRCTR TYPE STRING,
RHCUR TYPE STRING,
RKCUR TYPE STRING,
ROCUR TYPE STRING,
RUNIT TYPE STRING,
RVUNIT TYPE STRING,
RRUNIT TYPE STRING,
HSL TYPE STRING,
OSL TYPE STRING,
LBKUM TYPE STRING,
MSL TYPE STRING,
VMSL TYPE STRING,
RMSL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMLV_INV_BASE_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_FMLV_INV_BASE_STR-RCLNT sy-vline 
WA_FMLV_INV_BASE_STR-RLDNR sy-vline 
WA_FMLV_INV_BASE_STR-RBUKRS sy-vline 
WA_FMLV_INV_BASE_STR-GJAHR sy-vline 
WA_FMLV_INV_BASE_STR-POPER sy-vline 
WA_FMLV_INV_BASE_STR-DRCRK sy-vline 
WA_FMLV_INV_BASE_STR-PERART sy-vline 
WA_FMLV_INV_BASE_STR-FISCYEARPER sy-vline 
WA_FMLV_INV_BASE_STR-KOKRS sy-vline 
WA_FMLV_INV_BASE_STR-ERKRS sy-vline 
WA_FMLV_INV_BASE_STR-KALNR sy-vline 
WA_FMLV_INV_BASE_STR-MATNR sy-vline 
WA_FMLV_INV_BASE_STR-BWKEY sy-vline 
WA_FMLV_INV_BASE_STR-BWTAR sy-vline 
WA_FMLV_INV_BASE_STR-KZBWS sy-vline 
WA_FMLV_INV_BASE_STR-SOBKZ sy-vline 
WA_FMLV_INV_BASE_STR-MAT_KDAUF sy-vline 
WA_FMLV_INV_BASE_STR-MAT_KDPOS sy-vline 
WA_FMLV_INV_BASE_STR-MAT_PSPNR sy-vline 
WA_FMLV_INV_BASE_STR-MAT_LIFNR sy-vline 
WA_FMLV_INV_BASE_STR-MAT_PS_POSID sy-vline 
WA_FMLV_INV_BASE_STR-KTOSL sy-vline 
WA_FMLV_INV_BASE_STR-KOART sy-vline 
WA_FMLV_INV_BASE_STR-RACCT sy-vline 
WA_FMLV_INV_BASE_STR-KTOPL sy-vline 
WA_FMLV_INV_BASE_STR-PERIV sy-vline 
WA_FMLV_INV_BASE_STR-WERKS sy-vline 
WA_FMLV_INV_BASE_STR-SEGMENT sy-vline 
WA_FMLV_INV_BASE_STR-PRCTR sy-vline 
WA_FMLV_INV_BASE_STR-RHCUR sy-vline 
WA_FMLV_INV_BASE_STR-RKCUR sy-vline 
WA_FMLV_INV_BASE_STR-ROCUR sy-vline 
WA_FMLV_INV_BASE_STR-RUNIT sy-vline 
WA_FMLV_INV_BASE_STR-RVUNIT sy-vline 
WA_FMLV_INV_BASE_STR-RRUNIT sy-vline 
WA_FMLV_INV_BASE_STR-HSL sy-vline 
WA_FMLV_INV_BASE_STR-OSL sy-vline 
WA_FMLV_INV_BASE_STR-LBKUM sy-vline 
WA_FMLV_INV_BASE_STR-MSL sy-vline 
WA_FMLV_INV_BASE_STR-VMSL sy-vline 
WA_FMLV_INV_BASE_STR-RMSL sy-vline      INTO ld_text SEPARATED BY SPACE.

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