ABAP Select data from SAP table /SCMTMS/C_GNT_LA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCMTMS/C_GNT_LA 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 /SCMTMS/C_GNT_LA. 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 /SCMTMS/C_GNT_LA 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_/SCMTMS/C_GNT_LA TYPE STANDARD TABLE OF /SCMTMS/C_GNT_LA,
      WA_/SCMTMS/C_GNT_LA TYPE /SCMTMS/C_GNT_LA,
      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: </SCMTMS/C_GNT_LA> TYPE /SCMTMS/C_GNT_LA.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCMTMS/C_GNT_LA
  INTO TABLE IT_/SCMTMS/C_GNT_LA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCMTMS/C_GNT_LA
*  INTO TABLE @DATA(IT_/SCMTMS/C_GNT_LA2).
*--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_/SCMTMS/C_GNT_LA INDEX 1 INTO DATA(WA_/SCMTMS/C_GNT_LA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCMTMS/C_GNT_LA ASSIGNING </SCMTMS/C_GNT_LA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCMTMS/C_GNT_LA>-MANDT = 1.
</SCMTMS/C_GNT_LA>-LAYOUT_ID = 1.
</SCMTMS/C_GNT_LA>-DEFAULT_LAYOUT = 1.
</SCMTMS/C_GNT_LA>-NOW_LINE = 1.
</SCMTMS/C_GNT_LA>-CURSOR_LINE = 1.

ENDLOOP.

LOOP AT IT_/SCMTMS/C_GNT_LA INTO WA_/SCMTMS/C_GNT_LA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCMTMS/C_GNT_LA-SCROLL_SYNCH, sy-vline,
  WA_/SCMTMS/C_GNT_LA-DISPLAY_REL_DOC, sy-vline,
  WA_/SCMTMS/C_GNT_LA-BIRDEYE_TYPE, sy-vline,
  WA_/SCMTMS/C_GNT_LA-DEFAULT_CROSSROW_DD_MODE, sy-vline,
  WA_/SCMTMS/C_GNT_LA-DEFAULT_INROW_DD_MODE, sy-vline,
  WA_/SCMTMS/C_GNT_LA-INITIAL_VIEW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCMTMS/C_GNT_LA 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_/SCMTMS/C_GNT_LA 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_/SCMTMS/C_GNT_LA INTO WA_/SCMTMS/C_GNT_LA.


*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 TSTLC, internal->external for field CREATED_ON
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/C_GNT_LA-CREATED_ON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/C_GNT_LA-CREATED_ON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGED_ON
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/C_GNT_LA-CHANGED_ON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/C_GNT_LA-CHANGED_ON.
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_/SCMTMS/C_GNT_LA_STR, 
MANDT TYPE STRING,
LAYOUT_ID TYPE STRING,
DEFAULT_LAYOUT TYPE STRING,
NOW_LINE TYPE STRING,
CURSOR_LINE TYPE STRING,
SCROLL_SYNCH TYPE STRING,
DISPLAY_REL_DOC TYPE STRING,
BIRDEYE_TYPE TYPE STRING,
DEFAULT_CROSSROW_DD_MODE TYPE STRING,
DEFAULT_INROW_DD_MODE TYPE STRING,
INITIAL_VIEW TYPE STRING,
ACT_SCHEME TYPE STRING,
ORDER_SCHEME TYPE STRING,
NON_AVAILIBILITY_COLOR_ID TYPE STRING,
LABEL_SCHEME_ACTIVITIES TYPE STRING,
LABEL_SCHEME_DOCUMENTS TYPE STRING,
ENABLE_UTILISATION TYPE STRING,
UTILISATION_SCHEME TYPE STRING,
ORIGIN_ZOOM_GANULARITY TYPE STRING,
NOT_SCHEME_ID TYPE STRING,
DISPLAY_CTL_ID TYPE STRING,
MIRRORING_MODE TYPE STRING,
SMART_ADD_SEL_BEHAVIOR TYPE STRING,
QV_DELAY TYPE STRING,
DD_TARGET_DTM_MODE TYPE STRING,
IS_EXPL_LAYOUT TYPE STRING,
RELATIONSHIP_COLOR TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_ON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCMTMS/C_GNT_LA_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_/SCMTMS/C_GNT_LA_STR-MANDT sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-LAYOUT_ID sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-DEFAULT_LAYOUT sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-NOW_LINE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-CURSOR_LINE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-SCROLL_SYNCH sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-DISPLAY_REL_DOC sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-BIRDEYE_TYPE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-DEFAULT_CROSSROW_DD_MODE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-DEFAULT_INROW_DD_MODE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-INITIAL_VIEW sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-ACT_SCHEME sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-ORDER_SCHEME sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-NON_AVAILIBILITY_COLOR_ID sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-LABEL_SCHEME_ACTIVITIES sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-LABEL_SCHEME_DOCUMENTS sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-ENABLE_UTILISATION sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-UTILISATION_SCHEME sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-ORIGIN_ZOOM_GANULARITY sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-NOT_SCHEME_ID sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-DISPLAY_CTL_ID sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-MIRRORING_MODE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-SMART_ADD_SEL_BEHAVIOR sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-QV_DELAY sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-DD_TARGET_DTM_MODE sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-IS_EXPL_LAYOUT sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-RELATIONSHIP_COLOR sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-CREATED_BY sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-CREATED_ON sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-CHANGED_BY sy-vline 
WA_/SCMTMS/C_GNT_LA_STR-CHANGED_ON sy-vline      INTO ld_text SEPARATED BY SPACE.

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