ABAP Select data from SAP table T71LB1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T71LB1 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 T71LB1. 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 T71LB1 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_T71LB1 TYPE STANDARD TABLE OF T71LB1,
      WA_T71LB1 TYPE T71LB1,
      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: <T71LB1> TYPE T71LB1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T71LB1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T71LB1
  INTO TABLE IT_T71LB1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T71LB1
*  INTO TABLE @DATA(IT_T71LB12).
*--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_T71LB1 INDEX 1 INTO DATA(WA_T71LB12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T71LB1 ASSIGNING <T71LB1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T71LB1>-MANDT = 1.
<T71LB1>-AWARD = 1.
<T71LB1>-ENDDA = 1.
<T71LB1>-ADATE = 1.
<T71LB1>-ATYPE = 1.

ENDLOOP.

LOOP AT IT_T71LB1 INTO WA_T71LB1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T71LB1-ATERM, sy-vline,
  WA_T71LB1-TUNIT, sy-vline,
  WA_T71LB1-VRULE, sy-vline,
  WA_T71LB1-ERULE, sy-vline,
  WA_T71LB1-CAIND, sy-vline,
  WA_T71LB1-CDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T71LB1 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_T71LB1 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_T71LB1 INTO WA_T71LB1.


*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 TRSID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T71LB1-TRSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T71LB1-TRSID.
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_T71LB1_STR, 
MANDT TYPE STRING,
AWARD TYPE STRING,
ENDDA TYPE STRING,
ADATE TYPE STRING,
ATYPE TYPE STRING,
ATERM TYPE STRING,
TUNIT TYPE STRING,
VRULE TYPE STRING,
ERULE TYPE STRING,
CAIND TYPE STRING,
CDATE TYPE STRING,
WPGRT TYPE STRING,
WGUNT TYPE STRING,
WPVST TYPE STRING,
WVUNT TYPE STRING,
WPEXC TYPE STRING,
WEUNT TYPE STRING,
TRSID TYPE STRING,
EXCHN TYPE STRING,
RTYPE TYPE STRING,
MSXRC TYPE STRING,
RDSTR TYPE STRING,
EXWND TYPE STRING,
APIND TYPE STRING,
AWDVD TYPE STRING,
AWDVR TYPE STRING,
ACCMODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T71LB1_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_T71LB1_STR-MANDT sy-vline 
WA_T71LB1_STR-AWARD sy-vline 
WA_T71LB1_STR-ENDDA sy-vline 
WA_T71LB1_STR-ADATE sy-vline 
WA_T71LB1_STR-ATYPE sy-vline 
WA_T71LB1_STR-ATERM sy-vline 
WA_T71LB1_STR-TUNIT sy-vline 
WA_T71LB1_STR-VRULE sy-vline 
WA_T71LB1_STR-ERULE sy-vline 
WA_T71LB1_STR-CAIND sy-vline 
WA_T71LB1_STR-CDATE sy-vline 
WA_T71LB1_STR-WPGRT sy-vline 
WA_T71LB1_STR-WGUNT sy-vline 
WA_T71LB1_STR-WPVST sy-vline 
WA_T71LB1_STR-WVUNT sy-vline 
WA_T71LB1_STR-WPEXC sy-vline 
WA_T71LB1_STR-WEUNT sy-vline 
WA_T71LB1_STR-TRSID sy-vline 
WA_T71LB1_STR-EXCHN sy-vline 
WA_T71LB1_STR-RTYPE sy-vline 
WA_T71LB1_STR-MSXRC sy-vline 
WA_T71LB1_STR-RDSTR sy-vline 
WA_T71LB1_STR-EXWND sy-vline 
WA_T71LB1_STR-APIND sy-vline 
WA_T71LB1_STR-AWDVD sy-vline 
WA_T71LB1_STR-AWDVR sy-vline 
WA_T71LB1_STR-ACCMODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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