ABAP Select data from SAP table P02_B2A_TMS_DAT_DIR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P02_B2A_TMS_DAT_DIR 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 P02_B2A_TMS_DAT_DIR. 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 P02_B2A_TMS_DAT_DIR 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_P02_B2A_TMS_DAT_DIR TYPE STANDARD TABLE OF P02_B2A_TMS_DAT_DIR,
      WA_P02_B2A_TMS_DAT_DIR TYPE P02_B2A_TMS_DAT_DIR,
      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: <P02_B2A_TMS_DAT_DIR> TYPE P02_B2A_TMS_DAT_DIR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P02_B2A_TMS_DAT_DIR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P02_B2A_TMS_DAT_DIR
  INTO TABLE IT_P02_B2A_TMS_DAT_DIR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P02_B2A_TMS_DAT_DIR
*  INTO TABLE @DATA(IT_P02_B2A_TMS_DAT_DIR2).
*--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_P02_B2A_TMS_DAT_DIR INDEX 1 INTO DATA(WA_P02_B2A_TMS_DAT_DIR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P02_B2A_TMS_DAT_DIR ASSIGNING <P02_B2A_TMS_DAT_DIR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P02_B2A_TMS_DAT_DIR>-ANWSCHCH = 1.
<P02_B2A_TMS_DAT_DIR>-CONTTYPE = 1.
<P02_B2A_TMS_DAT_DIR>-TABNR = 1.
<P02_B2A_TMS_DAT_DIR>-STRUCNAME = 1.
<P02_B2A_TMS_DAT_DIR>-STRUCVER = 1.

ENDLOOP.

LOOP AT IT_P02_B2A_TMS_DAT_DIR INTO WA_P02_B2A_TMS_DAT_DIR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P02_B2A_TMS_DAT_DIR-LTYPE, sy-vline,
  WA_P02_B2A_TMS_DAT_DIR-LTYPENO, sy-vline,
  WA_P02_B2A_TMS_DAT_DIR-LCOUNT, sy-vline,
  WA_P02_B2A_TMS_DAT_DIR-TSIZE, sy-vline,
  WA_P02_B2A_TMS_DAT_DIR-SEQNR, sy-vline,
  WA_P02_B2A_TMS_DAT_DIR-ABREH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P02_B2A_TMS_DAT_DIR 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_P02_B2A_TMS_DAT_DIR 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_P02_B2A_TMS_DAT_DIR INTO WA_P02_B2A_TMS_DAT_DIR.


*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_P02_B2A_TMS_DAT_DIR_STR, 
ANWSCHCH TYPE STRING,
CONTTYPE TYPE STRING,
TABNR TYPE STRING,
STRUCNAME TYPE STRING,
STRUCVER TYPE STRING,
LTYPE TYPE STRING,
LTYPENO TYPE STRING,
LCOUNT TYPE STRING,
TSIZE TYPE STRING,
SEQNR TYPE STRING,
ABREH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P02_B2A_TMS_DAT_DIR_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_P02_B2A_TMS_DAT_DIR_STR-ANWSCHCH sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-CONTTYPE sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-TABNR sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-STRUCNAME sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-STRUCVER sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-LTYPE sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-LTYPENO sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-LCOUNT sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-TSIZE sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-SEQNR sy-vline 
WA_P02_B2A_TMS_DAT_DIR_STR-ABREH sy-vline      INTO ld_text SEPARATED BY SPACE.

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