ABAP Select data from SAP table LAY108 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LAY108 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 LAY108. 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 LAY108 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_LAY108 TYPE STANDARD TABLE OF LAY108,
      WA_LAY108 TYPE LAY108,
      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: <LAY108> TYPE LAY108.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LAY108.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LAY108
  INTO TABLE IT_LAY108.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LAY108
*  INTO TABLE @DATA(IT_LAY1082).
*--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_LAY108 INDEX 1 INTO DATA(WA_LAY1082).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LAY108 ASSIGNING <LAY108>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LAY108>-EPS_MON = 1.
<LAY108>-GENERATE = 1.
<LAY108>-BACKUP = 1.
<LAY108>-RB_STAND = 1.
<LAY108>-RB_TEST = 1.

ENDLOOP.

LOOP AT IT_LAY108 INTO WA_LAY108.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LAY108-RB_STAND_AO, sy-vline,
  WA_LAY108-RB_TEST_AO, sy-vline,
  WA_LAY108-CREATE_DF, sy-vline,
  WA_LAY108-DELETE_DF, sy-vline,
  WA_LAY108-DISP_CONT, sy-vline,
  WA_LAY108-START_DIR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LAY108 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_LAY108 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_LAY108 INTO WA_LAY108.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LAY108_STR, 
EPS_MON TYPE STRING,
GENERATE TYPE STRING,
BACKUP TYPE STRING,
RB_STAND TYPE STRING,
RB_TEST TYPE STRING,
RB_STAND_AO TYPE STRING,
RB_TEST_AO TYPE STRING,
CREATE_DF TYPE STRING,
DELETE_DF TYPE STRING,
DISP_CONT TYPE STRING,
START_DIR TYPE STRING,
SAVE_LAST TYPE STRING,
DEL_FILE TYPE STRING,
RB_GEN_OFF TYPE STRING,
RB_GEN_ON TYPE STRING,
RB_GEN_SAP TYPE STRING,
INACT_IMP TYPE STRING,
INACTIMPAO TYPE STRING,
CREATE_VRS TYPE STRING,
EPS_DIR TYPE STRING,
EPS_DEST TYPE STRING,
MIMPPRC_AO TYPE STRING,
BTCHPRC_AO TYPE STRING,
RB_QC_MULT TYPE STRING,
RB_QC_ONE TYPE STRING,
RB_MOD_ON TYPE STRING,
RB_MOD_OFF TYPE STRING,
RB_MOD_ASK TYPE STRING,
DISP_INACT TYPE STRING,
DISP_UNUSD TYPE STRING,
REQ_SFXREP TYPE STRING,
SMP_USER TYPE STRING,
R3TRANSPRC TYPE STRING,
CHK_TMS TYPE STRING,
CHK_DDIC TYPE STRING,
CHK_RTA_SNDFRM TYPE STRING,
DD_RTA_SYSTYP TYPE STRING,
RTA_CNTACT TYPE STRING,
SIG_CHECK TYPE STRING,
IMP_SIG_CHECK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LAY108_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_LAY108_STR-EPS_MON sy-vline 
WA_LAY108_STR-GENERATE sy-vline 
WA_LAY108_STR-BACKUP sy-vline 
WA_LAY108_STR-RB_STAND sy-vline 
WA_LAY108_STR-RB_TEST sy-vline 
WA_LAY108_STR-RB_STAND_AO sy-vline 
WA_LAY108_STR-RB_TEST_AO sy-vline 
WA_LAY108_STR-CREATE_DF sy-vline 
WA_LAY108_STR-DELETE_DF sy-vline 
WA_LAY108_STR-DISP_CONT sy-vline 
WA_LAY108_STR-START_DIR sy-vline 
WA_LAY108_STR-SAVE_LAST sy-vline 
WA_LAY108_STR-DEL_FILE sy-vline 
WA_LAY108_STR-RB_GEN_OFF sy-vline 
WA_LAY108_STR-RB_GEN_ON sy-vline 
WA_LAY108_STR-RB_GEN_SAP sy-vline 
WA_LAY108_STR-INACT_IMP sy-vline 
WA_LAY108_STR-INACTIMPAO sy-vline 
WA_LAY108_STR-CREATE_VRS sy-vline 
WA_LAY108_STR-EPS_DIR sy-vline 
WA_LAY108_STR-EPS_DEST sy-vline 
WA_LAY108_STR-MIMPPRC_AO sy-vline 
WA_LAY108_STR-BTCHPRC_AO sy-vline 
WA_LAY108_STR-RB_QC_MULT sy-vline 
WA_LAY108_STR-RB_QC_ONE sy-vline 
WA_LAY108_STR-RB_MOD_ON sy-vline 
WA_LAY108_STR-RB_MOD_OFF sy-vline 
WA_LAY108_STR-RB_MOD_ASK sy-vline 
WA_LAY108_STR-DISP_INACT sy-vline 
WA_LAY108_STR-DISP_UNUSD sy-vline 
WA_LAY108_STR-REQ_SFXREP sy-vline 
WA_LAY108_STR-SMP_USER sy-vline 
WA_LAY108_STR-R3TRANSPRC sy-vline 
WA_LAY108_STR-CHK_TMS sy-vline 
WA_LAY108_STR-CHK_DDIC sy-vline 
WA_LAY108_STR-CHK_RTA_SNDFRM sy-vline 
WA_LAY108_STR-DD_RTA_SYSTYP sy-vline 
WA_LAY108_STR-RTA_CNTACT sy-vline 
WA_LAY108_STR-SIG_CHECK sy-vline 
WA_LAY108_STR-IMP_SIG_CHECK sy-vline      INTO ld_text SEPARATED BY SPACE.

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