ABAP Select data from SAP table T334P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T334P 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 T334P. 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 T334P 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_T334P TYPE STANDARD TABLE OF T334P,
      WA_T334P TYPE T334P,
      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: <T334P> TYPE T334P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T334P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T334P
  INTO TABLE IT_T334P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T334P
*  INTO TABLE @DATA(IT_T334P2).
*--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_T334P INDEX 1 INTO DATA(WA_T334P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T334P ASSIGNING <T334P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T334P>-MANDT = 1.
<T334P>-LGNUM = 1.
<T334P>-LETYP = 1.
<T334P>-LPTY0 = 1.
<T334P>-LPTY1 = 1.

ENDLOOP.

LOOP AT IT_T334P INTO WA_T334P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T334P-LPTY2, sy-vline,
  WA_T334P-LPTY3, sy-vline,
  WA_T334P-LPTY4, sy-vline,
  WA_T334P-LPTY5, sy-vline,
  WA_T334P-LPTY6, sy-vline,
  WA_T334P-LPTY7, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T334P 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_T334P 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_T334P INTO WA_T334P.


*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_T334P_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
LETYP TYPE STRING,
LPTY0 TYPE STRING,
LPTY1 TYPE STRING,
LPTY2 TYPE STRING,
LPTY3 TYPE STRING,
LPTY4 TYPE STRING,
LPTY5 TYPE STRING,
LPTY6 TYPE STRING,
LPTY7 TYPE STRING,
LPTY8 TYPE STRING,
LPTY9 TYPE STRING,
LPT10 TYPE STRING,
LPT11 TYPE STRING,
LPT12 TYPE STRING,
LPT13 TYPE STRING,
LPT14 TYPE STRING,
LPT15 TYPE STRING,
LPT16 TYPE STRING,
LPT17 TYPE STRING,
LPT18 TYPE STRING,
LPT19 TYPE STRING,
LPT20 TYPE STRING,
LPT21 TYPE STRING,
LPT22 TYPE STRING,
LPT23 TYPE STRING,
LPT24 TYPE STRING,
LPT25 TYPE STRING,
LPT26 TYPE STRING,
LPT27 TYPE STRING,
LPT28 TYPE STRING,
LPT29 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T334P_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_T334P_STR-MANDT sy-vline 
WA_T334P_STR-LGNUM sy-vline 
WA_T334P_STR-LETYP sy-vline 
WA_T334P_STR-LPTY0 sy-vline 
WA_T334P_STR-LPTY1 sy-vline 
WA_T334P_STR-LPTY2 sy-vline 
WA_T334P_STR-LPTY3 sy-vline 
WA_T334P_STR-LPTY4 sy-vline 
WA_T334P_STR-LPTY5 sy-vline 
WA_T334P_STR-LPTY6 sy-vline 
WA_T334P_STR-LPTY7 sy-vline 
WA_T334P_STR-LPTY8 sy-vline 
WA_T334P_STR-LPTY9 sy-vline 
WA_T334P_STR-LPT10 sy-vline 
WA_T334P_STR-LPT11 sy-vline 
WA_T334P_STR-LPT12 sy-vline 
WA_T334P_STR-LPT13 sy-vline 
WA_T334P_STR-LPT14 sy-vline 
WA_T334P_STR-LPT15 sy-vline 
WA_T334P_STR-LPT16 sy-vline 
WA_T334P_STR-LPT17 sy-vline 
WA_T334P_STR-LPT18 sy-vline 
WA_T334P_STR-LPT19 sy-vline 
WA_T334P_STR-LPT20 sy-vline 
WA_T334P_STR-LPT21 sy-vline 
WA_T334P_STR-LPT22 sy-vline 
WA_T334P_STR-LPT23 sy-vline 
WA_T334P_STR-LPT24 sy-vline 
WA_T334P_STR-LPT25 sy-vline 
WA_T334P_STR-LPT26 sy-vline 
WA_T334P_STR-LPT27 sy-vline 
WA_T334P_STR-LPT28 sy-vline 
WA_T334P_STR-LPT29 sy-vline      INTO ld_text SEPARATED BY SPACE.

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