ABAP Select data from SAP table PTBUF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTBUF 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 PTBUF. 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 PTBUF 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_PTBUF TYPE STANDARD TABLE OF PTBUF,
      WA_PTBUF TYPE PTBUF,
      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: <PTBUF> TYPE PTBUF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTBUF
*  INTO TABLE @DATA(IT_PTBUF2).
*--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_PTBUF INDEX 1 INTO DATA(WA_PTBUF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTBUF>-SEQNO = 1.
<PTBUF>-VATYP = 1.
<PTBUF>-VAWDY = 1.
<PTBUF>-VAHDD = 1.
<PTBUF>-VAHDB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTBUF-VAHDA, sy-vline,
  WA_PTBUF-VATMC, sy-vline,
  WA_PTBUF-VADPC, sy-vline,
  WA_PTBUF-VATTY, sy-vline,
  WA_PTBUF-BEGTM, sy-vline,
  WA_PTBUF-ENDTM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTBUF 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_PTBUF 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_PTBUF INTO WA_PTBUF.


*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_PTBUF_STR, 
SEQNO TYPE STRING,
VATYP TYPE STRING,
VAWDY TYPE STRING,
VAHDD TYPE STRING,
VAHDB TYPE STRING,
VAHDA TYPE STRING,
VATMC TYPE STRING,
VADPC TYPE STRING,
VATTY TYPE STRING,
BEGTM TYPE STRING,
ENDTM TYPE STRING,
HRSLO TYPE STRING,
HRSLS TYPE STRING,
HRSHI TYPE STRING,
HRSHS TYPE STRING,
COTYP TYPE STRING,
COINT TYPE STRING,
EXITA TYPE STRING,
EXITR TYPE STRING,
LGMUL TYPE STRING,
LGART TYPE STRING,
INUMB TYPE STRING,
EXRUL TYPE STRING,
EXGWT TYPE STRING,
NOSPL TYPE STRING,
HRSMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTBUF_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_PTBUF_STR-SEQNO sy-vline 
WA_PTBUF_STR-VATYP sy-vline 
WA_PTBUF_STR-VAWDY sy-vline 
WA_PTBUF_STR-VAHDD sy-vline 
WA_PTBUF_STR-VAHDB sy-vline 
WA_PTBUF_STR-VAHDA sy-vline 
WA_PTBUF_STR-VATMC sy-vline 
WA_PTBUF_STR-VADPC sy-vline 
WA_PTBUF_STR-VATTY sy-vline 
WA_PTBUF_STR-BEGTM sy-vline 
WA_PTBUF_STR-ENDTM sy-vline 
WA_PTBUF_STR-HRSLO sy-vline 
WA_PTBUF_STR-HRSLS sy-vline 
WA_PTBUF_STR-HRSHI sy-vline 
WA_PTBUF_STR-HRSHS sy-vline 
WA_PTBUF_STR-COTYP sy-vline 
WA_PTBUF_STR-COINT sy-vline 
WA_PTBUF_STR-EXITA sy-vline 
WA_PTBUF_STR-EXITR sy-vline 
WA_PTBUF_STR-LGMUL sy-vline 
WA_PTBUF_STR-LGART sy-vline 
WA_PTBUF_STR-INUMB sy-vline 
WA_PTBUF_STR-EXRUL sy-vline 
WA_PTBUF_STR-EXGWT sy-vline 
WA_PTBUF_STR-NOSPL sy-vline 
WA_PTBUF_STR-HRSMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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