ABAP Select data from SAP table LANGTABT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LANGTABT
*  INTO TABLE @DATA(IT_LANGTABT2).
*--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_LANGTABT INDEX 1 INTO DATA(WA_LANGTABT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LANGTABT>-TABNAME = 1.
<LANGTABT>-SFIELD = 1.
<LANGTABT>-AS4FIELD = 1.
<LANGTABT>-TABCLASS = 1.
<LANGTABT>-SQLTAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LANGTABT-UNAME, sy-vline,
  WA_LANGTABT-CHECKTABLE, sy-vline,
  WA_LANGTABT-INTTYPE, sy-vline,
  WA_LANGTABT-CONFLAG, sy-vline,
  WA_LANGTABT-CLIEDEP, sy-vline,
  WA_LANGTABT-TLENGTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LANGTABT 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_LANGTABT 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_LANGTABT INTO WA_LANGTABT.


*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_LANGTABT_STR, 
TABNAME TYPE STRING,
SFIELD TYPE STRING,
AS4FIELD TYPE STRING,
TABCLASS TYPE STRING,
SQLTAB TYPE STRING,
UNAME TYPE STRING,
CHECKTABLE TYPE STRING,
INTTYPE TYPE STRING,
CONFLAG TYPE STRING,
CLIEDEP TYPE STRING,
TLENGTH TYPE STRING,
KLENGTH TYPE STRING,
LOFFSET TYPE STRING,
EXCHANGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LANGTABT_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_LANGTABT_STR-TABNAME sy-vline 
WA_LANGTABT_STR-SFIELD sy-vline 
WA_LANGTABT_STR-AS4FIELD sy-vline 
WA_LANGTABT_STR-TABCLASS sy-vline 
WA_LANGTABT_STR-SQLTAB sy-vline 
WA_LANGTABT_STR-UNAME sy-vline 
WA_LANGTABT_STR-CHECKTABLE sy-vline 
WA_LANGTABT_STR-INTTYPE sy-vline 
WA_LANGTABT_STR-CONFLAG sy-vline 
WA_LANGTABT_STR-CLIEDEP sy-vline 
WA_LANGTABT_STR-TLENGTH sy-vline 
WA_LANGTABT_STR-KLENGTH sy-vline 
WA_LANGTABT_STR-LOFFSET sy-vline 
WA_LANGTABT_STR-EXCHANGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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