ABAP Select data from SAP table PTM_MARKTAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTM_MARKTAB
*  INTO TABLE @DATA(IT_PTM_MARKTAB2).
*--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_PTM_MARKTAB INDEX 1 INTO DATA(WA_PTM_MARKTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTM_MARKTAB>-CDATE = 1.
<PTM_MARKTAB>-AWART = 1.
<PTM_MARKTAB>-OBEGD = 1.
<PTM_MARKTAB>-OENDD = 1.
<PTM_MARKTAB>-KENN1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTM_MARKTAB-KENN2, sy-vline,
  WA_PTM_MARKTAB-MARK, sy-vline,
  WA_PTM_MARKTAB-DOCNR, sy-vline,
  WA_PTM_MARKTAB-FRACTION, sy-vline,
  WA_PTM_MARKTAB-COVUNIT, sy-vline,
  WA_PTM_MARKTAB-SEQNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTM_MARKTAB 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_PTM_MARKTAB 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_PTM_MARKTAB INTO WA_PTM_MARKTAB.


*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_PTM_MARKTAB_STR, 
CDATE TYPE STRING,
AWART TYPE STRING,
OBEGD TYPE STRING,
OENDD TYPE STRING,
KENN1 TYPE STRING,
KENN2 TYPE STRING,
MARK TYPE STRING,
DOCNR TYPE STRING,
FRACTION TYPE STRING,
COVUNIT TYPE STRING,
SEQNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTM_MARKTAB_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_PTM_MARKTAB_STR-CDATE sy-vline 
WA_PTM_MARKTAB_STR-AWART sy-vline 
WA_PTM_MARKTAB_STR-OBEGD sy-vline 
WA_PTM_MARKTAB_STR-OENDD sy-vline 
WA_PTM_MARKTAB_STR-KENN1 sy-vline 
WA_PTM_MARKTAB_STR-KENN2 sy-vline 
WA_PTM_MARKTAB_STR-MARK sy-vline 
WA_PTM_MARKTAB_STR-DOCNR sy-vline 
WA_PTM_MARKTAB_STR-FRACTION sy-vline 
WA_PTM_MARKTAB_STR-COVUNIT sy-vline 
WA_PTM_MARKTAB_STR-SEQNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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