ABAP Select data from SAP table PST01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PST01 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 PST01. 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 PST01 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_PST01 TYPE STANDARD TABLE OF PST01,
      WA_PST01 TYPE PST01,
      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: <PST01> TYPE PST01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PST01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PST01
  INTO TABLE IT_PST01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PST01
*  INTO TABLE @DATA(IT_PST012).
*--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_PST01 INDEX 1 INTO DATA(WA_PST012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PST01 ASSIGNING <PST01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PST01>-ABRDA = 1.
<PST01>-STRKL = 1.
<PST01>-LZZRM = 1.
<PST01>-STTAB = 1.
<PST01>-ALTKZ = 1.

ENDLOOP.

LOOP AT IT_PST01 INTO WA_PST01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PST01-KDFBT, sy-vline,
  WA_PST01-BRUTT, sy-vline,
  WA_PST01-VRSBZ, sy-vline,
  WA_PST01-BMGAE, sy-vline,
  WA_PST01-PERFB, sy-vline,
  WA_PST01-VFBKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PST01 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_PST01 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_PST01 INTO WA_PST01.


*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_PST01_STR, 
ABRDA TYPE STRING,
STRKL TYPE STRING,
LZZRM TYPE STRING,
STTAB TYPE STRING,
ALTKZ TYPE STRING,
KDFBT TYPE STRING,
BRUTT TYPE STRING,
VRSBZ TYPE STRING,
BMGAE TYPE STRING,
PERFB TYPE STRING,
VFBKT TYPE STRING,
AEBKT TYPE STRING,
STPFL TYPE STRING,
KEINZ TYPE STRING,
WAERS TYPE STRING,
PERFJ TYPE STRING,
JARBL TYPE STRING,
VRSBJ TYPE STRING,
SOBEZ TYPE STRING,
VRSBS TYPE STRING,
MEHRJ TYPE STRING,
KNZMJ TYPE STRING,
ALVPM TYPE STRING,
ANZVB TYPE STRING,
VBEZL TYPE STRING,
VBEZS TYPE STRING,
AEBEJ TYPE STRING,
STRBG TYPE STRING,
VJAHR TYPE STRING,
VKAPA TYPE STRING,
VFBSK TYPE STRING,
VOPAM TYPE STRING,
TFBOS TYPE STRING,
MBS TYPE STRING,
FVB TYPE STRING,
FVBZ TYPE STRING,
ANP TYPE STRING,
ALTE TYPE STRING,
SUMMJ TYPE STRING,
AF TYPE STRING,
ENTSCH TYPE STRING,
FAKTOR TYPE STRING,
KRV TYPE STRING,
PKPV TYPE STRING,
PKV TYPE STRING,
PVS TYPE STRING,
PVZ TYPE STRING,
EXTERN TYPE STRING,
SONSTENT TYPE STRING,
JRE4ENT TYPE STRING,
KVZ TYPE STRING,
LAND_DBA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PST01_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_PST01_STR-ABRDA sy-vline 
WA_PST01_STR-STRKL sy-vline 
WA_PST01_STR-LZZRM sy-vline 
WA_PST01_STR-STTAB sy-vline 
WA_PST01_STR-ALTKZ sy-vline 
WA_PST01_STR-KDFBT sy-vline 
WA_PST01_STR-BRUTT sy-vline 
WA_PST01_STR-VRSBZ sy-vline 
WA_PST01_STR-BMGAE sy-vline 
WA_PST01_STR-PERFB sy-vline 
WA_PST01_STR-VFBKT sy-vline 
WA_PST01_STR-AEBKT sy-vline 
WA_PST01_STR-STPFL sy-vline 
WA_PST01_STR-KEINZ sy-vline 
WA_PST01_STR-WAERS sy-vline 
WA_PST01_STR-PERFJ sy-vline 
WA_PST01_STR-JARBL sy-vline 
WA_PST01_STR-VRSBJ sy-vline 
WA_PST01_STR-SOBEZ sy-vline 
WA_PST01_STR-VRSBS sy-vline 
WA_PST01_STR-MEHRJ sy-vline 
WA_PST01_STR-KNZMJ sy-vline 
WA_PST01_STR-ALVPM sy-vline 
WA_PST01_STR-ANZVB sy-vline 
WA_PST01_STR-VBEZL sy-vline 
WA_PST01_STR-VBEZS sy-vline 
WA_PST01_STR-AEBEJ sy-vline 
WA_PST01_STR-STRBG sy-vline 
WA_PST01_STR-VJAHR sy-vline 
WA_PST01_STR-VKAPA sy-vline 
WA_PST01_STR-VFBSK sy-vline 
WA_PST01_STR-VOPAM sy-vline 
WA_PST01_STR-TFBOS sy-vline 
WA_PST01_STR-MBS sy-vline 
WA_PST01_STR-FVB sy-vline 
WA_PST01_STR-FVBZ sy-vline 
WA_PST01_STR-ANP sy-vline 
WA_PST01_STR-ALTE sy-vline 
WA_PST01_STR-SUMMJ sy-vline 
WA_PST01_STR-AF sy-vline 
WA_PST01_STR-ENTSCH sy-vline 
WA_PST01_STR-FAKTOR sy-vline 
WA_PST01_STR-KRV sy-vline 
WA_PST01_STR-PKPV sy-vline 
WA_PST01_STR-PKV sy-vline 
WA_PST01_STR-PVS sy-vline 
WA_PST01_STR-PVZ sy-vline 
WA_PST01_STR-EXTERN sy-vline 
WA_PST01_STR-SONSTENT sy-vline 
WA_PST01_STR-JRE4ENT sy-vline 
WA_PST01_STR-KVZ sy-vline 
WA_PST01_STR-LAND_DBA sy-vline      INTO ld_text SEPARATED BY SPACE.

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