ABAP Select data from SAP table PTP42 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTP42 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 PTP42. 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 PTP42 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_PTP42 TYPE STANDARD TABLE OF PTP42,
      WA_PTP42 TYPE PTP42,
      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: <PTP42> TYPE PTP42.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PTP42.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PTP42
  INTO TABLE IT_PTP42.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTP42
*  INTO TABLE @DATA(IT_PTP422).
*--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_PTP42 INDEX 1 INTO DATA(WA_PTP422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PTP42 ASSIGNING <PTP42>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTP42>-MANDT = 1.
<PTP42>-PERNR = 1.
<PTP42>-REINR = 1.
<PTP42>-PERIO = 1.
<PTP42>-PDVRS = 1.

ENDLOOP.

LOOP AT IT_PTP42 INTO WA_PTP42.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTP42-HDVRS, sy-vline,
  WA_PTP42-PDATV, sy-vline,
  WA_PTP42-PUHRV, sy-vline,
  WA_PTP42-PDATB, sy-vline,
  WA_PTP42-PUHRB, sy-vline,
  WA_PTP42-DRUCK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTP42 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_PTP42 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_PTP42 INTO WA_PTP42.


*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.

*Conversion exit GJAHR, internal->external for field ABRJ1
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PTP42-ABRJ1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTP42-ABRJ1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field ABRJ2
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PTP42-ABRJ2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTP42-ABRJ2.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PTP42_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
REINR TYPE STRING,
PERIO TYPE STRING,
PDVRS TYPE STRING,
HDVRS TYPE STRING,
PDATV TYPE STRING,
PUHRV TYPE STRING,
PDATB TYPE STRING,
PUHRB TYPE STRING,
DRUCK TYPE STRING,
ANTRG TYPE STRING,
ABREC TYPE STRING,
UEBLG TYPE STRING,
UEBRF TYPE STRING,
UEBDT TYPE STRING,
TLOCK TYPE STRING,
WAERS TYPE STRING,
ABRJ1 TYPE STRING,
ABRP1 TYPE STRING,
PERM1 TYPE STRING,
ABKR1 TYPE STRING,
BEGP1 TYPE STRING,
ENDP1 TYPE STRING,
ABRJ2 TYPE STRING,
ABRP2 TYPE STRING,
PERM2 TYPE STRING,
ABKR2 TYPE STRING,
BEGP2 TYPE STRING,
ENDP2 TYPE STRING,
ACCDT TYPE STRING,
ACCTM TYPE STRING,
RUNID TYPE STRING,
VERPA TYPE STRING,
UEBKZ TYPE STRING,
ANUEP TYPE STRING,
NO_MILES TYPE STRING,
LSTAY TYPE STRING,
KATRE_STATUS TYPE STRING,
KATRE_ID TYPE STRING,
KATRE_DELID TYPE STRING,
KATRE_SAPDELID TYPE STRING,
TR_DOPP_ANZAHL TYPE STRING,
TR_EINF_ANZAHL TYPE STRING,
TR_ENTFERNUNG TYPE STRING,
VU_EA_DOPP_ANZ TYPE STRING,
VU_EA_EINF_ANZ TYPE STRING,
VU_EA_ENTFERN TYPE STRING,
VU_EA_KM_SATZ TYPE STRING,
NU_EA_DOPP_ANZ TYPE STRING,
NU_EA_EINF_ANZ TYPE STRING,
NU_EA_ENTFERN TYPE STRING,
NU_EA_KM_SATZ TYPE STRING,
V_UNENTGELTLICH TYPE STRING,
U_UNENTGELTLICH TYPE STRING,
REDUC_ERGRU TYPE STRING,
NOT_PAID TYPE STRING,
WEG_ERH_MAX TYPE STRING,
ERH_DIENST_INT TYPE STRING,
ENTF_WO_DO TYPE STRING,
DRITTMITTEL TYPE STRING,
ANTRAG_GWE TYPE STRING,
POLICY_VIOLATION TYPE STRING,
EXCEPTION_FLAG TYPE STRING,
NR_RECEIPTS TYPE STRING,
PERM_TRIP_APPR TYPE STRING,
TR_NR_FROM_HOME TYPE STRING,
VAT_STATUS TYPE STRING,
EST_COST_PLAN TYPE STRING,
EST_COST_REQ TYPE STRING,
REASON TYPE STRING,
LSTAY_ACC TYPE STRING,
EXCL_PERIOD_EXC TYPE STRING,
TAX_TRIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTP42_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_PTP42_STR-MANDT sy-vline 
WA_PTP42_STR-PERNR sy-vline 
WA_PTP42_STR-REINR sy-vline 
WA_PTP42_STR-PERIO sy-vline 
WA_PTP42_STR-PDVRS sy-vline 
WA_PTP42_STR-HDVRS sy-vline 
WA_PTP42_STR-PDATV sy-vline 
WA_PTP42_STR-PUHRV sy-vline 
WA_PTP42_STR-PDATB sy-vline 
WA_PTP42_STR-PUHRB sy-vline 
WA_PTP42_STR-DRUCK sy-vline 
WA_PTP42_STR-ANTRG sy-vline 
WA_PTP42_STR-ABREC sy-vline 
WA_PTP42_STR-UEBLG sy-vline 
WA_PTP42_STR-UEBRF sy-vline 
WA_PTP42_STR-UEBDT sy-vline 
WA_PTP42_STR-TLOCK sy-vline 
WA_PTP42_STR-WAERS sy-vline 
WA_PTP42_STR-ABRJ1 sy-vline 
WA_PTP42_STR-ABRP1 sy-vline 
WA_PTP42_STR-PERM1 sy-vline 
WA_PTP42_STR-ABKR1 sy-vline 
WA_PTP42_STR-BEGP1 sy-vline 
WA_PTP42_STR-ENDP1 sy-vline 
WA_PTP42_STR-ABRJ2 sy-vline 
WA_PTP42_STR-ABRP2 sy-vline 
WA_PTP42_STR-PERM2 sy-vline 
WA_PTP42_STR-ABKR2 sy-vline 
WA_PTP42_STR-BEGP2 sy-vline 
WA_PTP42_STR-ENDP2 sy-vline 
WA_PTP42_STR-ACCDT sy-vline 
WA_PTP42_STR-ACCTM sy-vline 
WA_PTP42_STR-RUNID sy-vline 
WA_PTP42_STR-VERPA sy-vline 
WA_PTP42_STR-UEBKZ sy-vline 
WA_PTP42_STR-ANUEP sy-vline 
WA_PTP42_STR-NO_MILES sy-vline 
WA_PTP42_STR-LSTAY sy-vline 
WA_PTP42_STR-KATRE_STATUS sy-vline 
WA_PTP42_STR-KATRE_ID sy-vline 
WA_PTP42_STR-KATRE_DELID sy-vline 
WA_PTP42_STR-KATRE_SAPDELID sy-vline 
WA_PTP42_STR-TR_DOPP_ANZAHL sy-vline 
WA_PTP42_STR-TR_EINF_ANZAHL sy-vline 
WA_PTP42_STR-TR_ENTFERNUNG sy-vline 
WA_PTP42_STR-VU_EA_DOPP_ANZ sy-vline 
WA_PTP42_STR-VU_EA_EINF_ANZ sy-vline 
WA_PTP42_STR-VU_EA_ENTFERN sy-vline 
WA_PTP42_STR-VU_EA_KM_SATZ sy-vline 
WA_PTP42_STR-NU_EA_DOPP_ANZ sy-vline 
WA_PTP42_STR-NU_EA_EINF_ANZ sy-vline 
WA_PTP42_STR-NU_EA_ENTFERN sy-vline 
WA_PTP42_STR-NU_EA_KM_SATZ sy-vline 
WA_PTP42_STR-V_UNENTGELTLICH sy-vline 
WA_PTP42_STR-U_UNENTGELTLICH sy-vline 
WA_PTP42_STR-REDUC_ERGRU sy-vline 
WA_PTP42_STR-NOT_PAID sy-vline 
WA_PTP42_STR-WEG_ERH_MAX sy-vline 
WA_PTP42_STR-ERH_DIENST_INT sy-vline 
WA_PTP42_STR-ENTF_WO_DO sy-vline 
WA_PTP42_STR-DRITTMITTEL sy-vline 
WA_PTP42_STR-ANTRAG_GWE sy-vline 
WA_PTP42_STR-POLICY_VIOLATION sy-vline 
WA_PTP42_STR-EXCEPTION_FLAG sy-vline 
WA_PTP42_STR-NR_RECEIPTS sy-vline 
WA_PTP42_STR-PERM_TRIP_APPR sy-vline 
WA_PTP42_STR-TR_NR_FROM_HOME sy-vline 
WA_PTP42_STR-VAT_STATUS sy-vline 
WA_PTP42_STR-EST_COST_PLAN sy-vline 
WA_PTP42_STR-EST_COST_REQ sy-vline 
WA_PTP42_STR-REASON sy-vline 
WA_PTP42_STR-LSTAY_ACC sy-vline 
WA_PTP42_STR-EXCL_PERIOD_EXC sy-vline 
WA_PTP42_STR-TAX_TRIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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