ABAP Select data from SAP table PSIZAPM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSIZAPM
*  INTO TABLE @DATA(IT_PSIZAPM2).
*--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_PSIZAPM INDEX 1 INTO DATA(WA_PSIZAPM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSIZAPM>-BUKRS = 1.
<PSIZAPM>-PMATS = 1.
<PSIZAPM>-PERNR = 1.
<PSIZAPM>-PMATS2 = 1.
<PSIZAPM>-NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSIZAPM-ADDRESS, sy-vline,
  WA_PSIZAPM-PRORA, sy-vline,
  WA_PSIZAPM-PACTI, sy-vline,
  WA_PSIZAPM-NASLO, sy-vline,
  WA_PSIZAPM-NASLO_C, sy-vline,
  WA_PSIZAPM-PTXNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSIZAPM 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_PSIZAPM 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_PSIZAPM INTO WA_PSIZAPM.


*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_PSIZAPM_STR, 
BUKRS TYPE STRING,
PMATS TYPE STRING,
PERNR TYPE STRING,
PMATS2 TYPE STRING,
NAME TYPE STRING,
ADDRESS TYPE STRING,
PRORA TYPE STRING,
PACTI TYPE STRING,
NASLO TYPE STRING,
NASLO_C TYPE STRING,
PTXNO TYPE STRING,
ACCNT TYPE STRING,
RESPO TYPE STRING,
TELNR TYPE STRING,
PACTI2 TYPE STRING,
NAME2 TYPE STRING,
ADDRESS2 TYPE STRING,
OBCINA2 TYPE STRING,
STATUS2 TYPE STRING,
A001 TYPE STRING,
A002 TYPE STRING,
A003 TYPE STRING,
A004 TYPE STRING,
A005 TYPE STRING,
A006 TYPE STRING,
A007 TYPE STRING,
A007N TYPE STRING,
A007A TYPE STRING,
A008 TYPE STRING,
A009 TYPE STRING,
C018 TYPE STRING,
C019 TYPE STRING,
C020 TYPE STRING,
C021 TYPE STRING,
C022 TYPE STRING,
C023 TYPE STRING,
D024 TYPE STRING,
E025 TYPE STRING,
E026 TYPE STRING,
F027 TYPE STRING,
F028 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSIZAPM_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_PSIZAPM_STR-BUKRS sy-vline 
WA_PSIZAPM_STR-PMATS sy-vline 
WA_PSIZAPM_STR-PERNR sy-vline 
WA_PSIZAPM_STR-PMATS2 sy-vline 
WA_PSIZAPM_STR-NAME sy-vline 
WA_PSIZAPM_STR-ADDRESS sy-vline 
WA_PSIZAPM_STR-PRORA sy-vline 
WA_PSIZAPM_STR-PACTI sy-vline 
WA_PSIZAPM_STR-NASLO sy-vline 
WA_PSIZAPM_STR-NASLO_C sy-vline 
WA_PSIZAPM_STR-PTXNO sy-vline 
WA_PSIZAPM_STR-ACCNT sy-vline 
WA_PSIZAPM_STR-RESPO sy-vline 
WA_PSIZAPM_STR-TELNR sy-vline 
WA_PSIZAPM_STR-PACTI2 sy-vline 
WA_PSIZAPM_STR-NAME2 sy-vline 
WA_PSIZAPM_STR-ADDRESS2 sy-vline 
WA_PSIZAPM_STR-OBCINA2 sy-vline 
WA_PSIZAPM_STR-STATUS2 sy-vline 
WA_PSIZAPM_STR-A001 sy-vline 
WA_PSIZAPM_STR-A002 sy-vline 
WA_PSIZAPM_STR-A003 sy-vline 
WA_PSIZAPM_STR-A004 sy-vline 
WA_PSIZAPM_STR-A005 sy-vline 
WA_PSIZAPM_STR-A006 sy-vline 
WA_PSIZAPM_STR-A007 sy-vline 
WA_PSIZAPM_STR-A007N sy-vline 
WA_PSIZAPM_STR-A007A sy-vline 
WA_PSIZAPM_STR-A008 sy-vline 
WA_PSIZAPM_STR-A009 sy-vline 
WA_PSIZAPM_STR-C018 sy-vline 
WA_PSIZAPM_STR-C019 sy-vline 
WA_PSIZAPM_STR-C020 sy-vline 
WA_PSIZAPM_STR-C021 sy-vline 
WA_PSIZAPM_STR-C022 sy-vline 
WA_PSIZAPM_STR-C023 sy-vline 
WA_PSIZAPM_STR-D024 sy-vline 
WA_PSIZAPM_STR-E025 sy-vline 
WA_PSIZAPM_STR-E026 sy-vline 
WA_PSIZAPM_STR-F027 sy-vline 
WA_PSIZAPM_STR-F028 sy-vline      INTO ld_text SEPARATED BY SPACE.

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