ABAP Select data from SAP table FGLV_MIG_BASE 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_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 FGLV_MIG_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 FGLV_MIG_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_FGLV_MIG_BASE TYPE STANDARD TABLE OF FGLV_MIG_BASE,
      WA_FGLV_MIG_BASE TYPE FGLV_MIG_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: <FGLV_MIG_BASE> TYPE FGLV_MIG_BASE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FGLV_MIG_BASE
*  INTO TABLE @DATA(IT_FGLV_MIG_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_FGLV_MIG_BASE INDEX 1 INTO DATA(WA_FGLV_MIG_BASE2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FGLV_MIG_BASE-RMVCT, sy-vline,
  WA_FGLV_MIG_BASE-RTCUR, sy-vline,
  WA_FGLV_MIG_BASE-RUNIT, sy-vline,
  WA_FGLV_MIG_BASE-AWTYP, sy-vline,
  WA_FGLV_MIG_BASE-RLDNR, sy-vline,
  WA_FGLV_MIG_BASE-RRCTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FGLV_MIG_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_FGLV_MIG_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_FGLV_MIG_BASE INTO WA_FGLV_MIG_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 GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FGLV_MIG_BASE-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGLV_MIG_BASE-RYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FGLV_MIG_BASE-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGLV_MIG_BASE-RECID.
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_BASE_STR, 
RCLNT TYPE STRING,
RYEAR TYPE STRING,
DRCRK TYPE STRING,
POPER TYPE STRING,
BTTYPE TYPE STRING,
RMVCT TYPE STRING,
RTCUR TYPE STRING,
RUNIT TYPE STRING,
AWTYP TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
AWSYS TYPE STRING,
RACCT TYPE STRING,
RBUKRS TYPE STRING,
RCNTR TYPE STRING,
PRCTR TYPE STRING,
RFAREA TYPE STRING,
RBUSA TYPE STRING,
KOKRS TYPE STRING,
SEGMENT TYPE STRING,
SCNTR TYPE STRING,
PPRCTR TYPE STRING,
SFAREA TYPE STRING,
SBUSA TYPE STRING,
RASSC TYPE STRING,
PSEGMENT TYPE STRING,
FIKRS TYPE STRING,
RFUND TYPE STRING,
RGRANT_NBR TYPE STRING,
RBUDGET_PD TYPE STRING,
SFUND TYPE STRING,
SGRANT_NBR TYPE STRING,
SBUDGET_PD TYPE STRING,
RE_BUKRS TYPE STRING,
RE_ACCOUNT TYPE STRING,
VNAME TYPE STRING,
EGRUP TYPE STRING,
RECID TYPE STRING,
TSL TYPE STRING,
HSL TYPE STRING,
KSL TYPE STRING,
OSL TYPE STRING,
VSL TYPE STRING,
BSL TYPE STRING,
CSL TYPE STRING,
DSL TYPE STRING,
ESL TYPE STRING,
FSL TYPE STRING,
GSL TYPE STRING,
MSL TYPE STRING,
TIMESTAMP TYPE STRING,
MIG_SOURCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FGLV_MIG_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_FGLV_MIG_BASE_STR-RCLNT sy-vline 
WA_FGLV_MIG_BASE_STR-RYEAR sy-vline 
WA_FGLV_MIG_BASE_STR-DRCRK sy-vline 
WA_FGLV_MIG_BASE_STR-POPER sy-vline 
WA_FGLV_MIG_BASE_STR-BTTYPE sy-vline 
WA_FGLV_MIG_BASE_STR-RMVCT sy-vline 
WA_FGLV_MIG_BASE_STR-RTCUR sy-vline 
WA_FGLV_MIG_BASE_STR-RUNIT sy-vline 
WA_FGLV_MIG_BASE_STR-AWTYP sy-vline 
WA_FGLV_MIG_BASE_STR-RLDNR sy-vline 
WA_FGLV_MIG_BASE_STR-RRCTY sy-vline 
WA_FGLV_MIG_BASE_STR-AWSYS sy-vline 
WA_FGLV_MIG_BASE_STR-RACCT sy-vline 
WA_FGLV_MIG_BASE_STR-RBUKRS sy-vline 
WA_FGLV_MIG_BASE_STR-RCNTR sy-vline 
WA_FGLV_MIG_BASE_STR-PRCTR sy-vline 
WA_FGLV_MIG_BASE_STR-RFAREA sy-vline 
WA_FGLV_MIG_BASE_STR-RBUSA sy-vline 
WA_FGLV_MIG_BASE_STR-KOKRS sy-vline 
WA_FGLV_MIG_BASE_STR-SEGMENT sy-vline 
WA_FGLV_MIG_BASE_STR-SCNTR sy-vline 
WA_FGLV_MIG_BASE_STR-PPRCTR sy-vline 
WA_FGLV_MIG_BASE_STR-SFAREA sy-vline 
WA_FGLV_MIG_BASE_STR-SBUSA sy-vline 
WA_FGLV_MIG_BASE_STR-RASSC sy-vline 
WA_FGLV_MIG_BASE_STR-PSEGMENT sy-vline 
WA_FGLV_MIG_BASE_STR-FIKRS sy-vline 
WA_FGLV_MIG_BASE_STR-RFUND sy-vline 
WA_FGLV_MIG_BASE_STR-RGRANT_NBR sy-vline 
WA_FGLV_MIG_BASE_STR-RBUDGET_PD sy-vline 
WA_FGLV_MIG_BASE_STR-SFUND sy-vline 
WA_FGLV_MIG_BASE_STR-SGRANT_NBR sy-vline 
WA_FGLV_MIG_BASE_STR-SBUDGET_PD sy-vline 
WA_FGLV_MIG_BASE_STR-RE_BUKRS sy-vline 
WA_FGLV_MIG_BASE_STR-RE_ACCOUNT sy-vline 
WA_FGLV_MIG_BASE_STR-VNAME sy-vline 
WA_FGLV_MIG_BASE_STR-EGRUP sy-vline 
WA_FGLV_MIG_BASE_STR-RECID sy-vline 
WA_FGLV_MIG_BASE_STR-TSL sy-vline 
WA_FGLV_MIG_BASE_STR-HSL sy-vline 
WA_FGLV_MIG_BASE_STR-KSL sy-vline 
WA_FGLV_MIG_BASE_STR-OSL sy-vline 
WA_FGLV_MIG_BASE_STR-VSL sy-vline 
WA_FGLV_MIG_BASE_STR-BSL sy-vline 
WA_FGLV_MIG_BASE_STR-CSL sy-vline 
WA_FGLV_MIG_BASE_STR-DSL sy-vline 
WA_FGLV_MIG_BASE_STR-ESL sy-vline 
WA_FGLV_MIG_BASE_STR-FSL sy-vline 
WA_FGLV_MIG_BASE_STR-GSL sy-vline 
WA_FGLV_MIG_BASE_STR-MSL sy-vline 
WA_FGLV_MIG_BASE_STR-TIMESTAMP sy-vline 
WA_FGLV_MIG_BASE_STR-MIG_SOURCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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