ABAP Select data from SAP table P3312 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P3312 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 P3312. 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 P3312 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_P3312 TYPE STANDARD TABLE OF P3312,
      WA_P3312 TYPE P3312,
      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: <P3312> TYPE P3312.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P3312.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P3312
  INTO TABLE IT_P3312.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P3312
*  INTO TABLE @DATA(IT_P33122).
*--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_P3312 INDEX 1 INTO DATA(WA_P33122).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P3312 ASSIGNING <P3312>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P3312>-PERNR = 1.
<P3312>-INFTY = 1.
<P3312>-SUBTY = 1.
<P3312>-OBJPS = 1.
<P3312>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P3312 INTO WA_P3312.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P3312-ENDDA, sy-vline,
  WA_P3312-BEGDA, sy-vline,
  WA_P3312-SEQNR, sy-vline,
  WA_P3312-AEDTM, sy-vline,
  WA_P3312-UNAME, sy-vline,
  WA_P3312-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P3312 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_P3312 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_P3312 INTO WA_P3312.


*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_P3312_STR, 
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
HISTO TYPE STRING,
ITXEX TYPE STRING,
REFEX TYPE STRING,
ORDEX TYPE STRING,
ITBLD TYPE STRING,
PREAS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
RESE1 TYPE STRING,
RESE2 TYPE STRING,
GRPVL TYPE STRING,
TRACE TYPE STRING,
ACCPL TYPE STRING,
ACCGD TYPE STRING,
ACCTM TYPE STRING,
COMGD TYPE STRING,
HOSPT TYPE STRING,
REASO TYPE STRING,
WINAM TYPE STRING,
FEEDB TYPE STRING,
ACCEP TYPE STRING,
ACCE2 TYPE STRING,
ACCE3 TYPE STRING,
ACCE4 TYPE STRING,
FILNO TYPE STRING,
ENTGD TYPE STRING,
HOSFD TYPE STRING,
HOSTD TYPE STRING,
HOMFD TYPE STRING,
HOMTD TYPE STRING,
TOTFD TYPE STRING,
TOTTD TYPE STRING,
COMDT TYPE STRING,
VISIT TYPE STRING,
MISDY TYPE STRING,
MISTY TYPE STRING,
ACMDY TYPE STRING,
RTWGD TYPE STRING,
PRVIP TYPE STRING,
FINAL TYPE STRING,
TRTWY TYPE STRING,
RTINJ TYPE STRING,
OUPHY TYPE STRING,
OUPHT TYPE STRING,
EQUIP TYPE STRING,
REHAB TYPE STRING,
FSTAT TYPE STRING,
FSTA2 TYPE STRING,
RECGD TYPE STRING,
STOPP TYPE STRING,
OHSTS TYPE STRING,
CMPID TYPE STRING,
INJUY TYPE STRING,
DEGRE TYPE STRING,
DEGR2 TYPE STRING,
ALWC1 TYPE STRING,
ALWT1 TYPE STRING,
AMTV1 TYPE STRING,
CURR1 TYPE STRING,
ALWC2 TYPE STRING,
ALWT2 TYPE STRING,
AMTV2 TYPE STRING,
CURR2 TYPE STRING,
ALWC3 TYPE STRING,
ALWT3 TYPE STRING,
AMTV3 TYPE STRING,
CURR3 TYPE STRING,
ALWC4 TYPE STRING,
ALWT4 TYPE STRING,
AMTV4 TYPE STRING,
CURR4 TYPE STRING,
ALWC5 TYPE STRING,
ALWT5 TYPE STRING,
AMTV5 TYPE STRING,
CURR5 TYPE STRING,
CURRY TYPE STRING,
LUMWY TYPE STRING,
PAYDT TYPE STRING,
BONDT TYPE STRING,
LGART TYPE STRING,
COMAM TYPE STRING,
INDNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P3312_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_P3312_STR-PERNR sy-vline 
WA_P3312_STR-INFTY sy-vline 
WA_P3312_STR-SUBTY sy-vline 
WA_P3312_STR-OBJPS sy-vline 
WA_P3312_STR-SPRPS sy-vline 
WA_P3312_STR-ENDDA sy-vline 
WA_P3312_STR-BEGDA sy-vline 
WA_P3312_STR-SEQNR sy-vline 
WA_P3312_STR-AEDTM sy-vline 
WA_P3312_STR-UNAME sy-vline 
WA_P3312_STR-HISTO sy-vline 
WA_P3312_STR-ITXEX sy-vline 
WA_P3312_STR-REFEX sy-vline 
WA_P3312_STR-ORDEX sy-vline 
WA_P3312_STR-ITBLD sy-vline 
WA_P3312_STR-PREAS sy-vline 
WA_P3312_STR-FLAG1 sy-vline 
WA_P3312_STR-FLAG2 sy-vline 
WA_P3312_STR-FLAG3 sy-vline 
WA_P3312_STR-FLAG4 sy-vline 
WA_P3312_STR-RESE1 sy-vline 
WA_P3312_STR-RESE2 sy-vline 
WA_P3312_STR-GRPVL sy-vline 
WA_P3312_STR-TRACE sy-vline 
WA_P3312_STR-ACCPL sy-vline 
WA_P3312_STR-ACCGD sy-vline 
WA_P3312_STR-ACCTM sy-vline 
WA_P3312_STR-COMGD sy-vline 
WA_P3312_STR-HOSPT sy-vline 
WA_P3312_STR-REASO sy-vline 
WA_P3312_STR-WINAM sy-vline 
WA_P3312_STR-FEEDB sy-vline 
WA_P3312_STR-ACCEP sy-vline 
WA_P3312_STR-ACCE2 sy-vline 
WA_P3312_STR-ACCE3 sy-vline 
WA_P3312_STR-ACCE4 sy-vline 
WA_P3312_STR-FILNO sy-vline 
WA_P3312_STR-ENTGD sy-vline 
WA_P3312_STR-HOSFD sy-vline 
WA_P3312_STR-HOSTD sy-vline 
WA_P3312_STR-HOMFD sy-vline 
WA_P3312_STR-HOMTD sy-vline 
WA_P3312_STR-TOTFD sy-vline 
WA_P3312_STR-TOTTD sy-vline 
WA_P3312_STR-COMDT sy-vline 
WA_P3312_STR-VISIT sy-vline 
WA_P3312_STR-MISDY sy-vline 
WA_P3312_STR-MISTY sy-vline 
WA_P3312_STR-ACMDY sy-vline 
WA_P3312_STR-RTWGD sy-vline 
WA_P3312_STR-PRVIP sy-vline 
WA_P3312_STR-FINAL sy-vline 
WA_P3312_STR-TRTWY sy-vline 
WA_P3312_STR-RTINJ sy-vline 
WA_P3312_STR-OUPHY sy-vline 
WA_P3312_STR-OUPHT sy-vline 
WA_P3312_STR-EQUIP sy-vline 
WA_P3312_STR-REHAB sy-vline 
WA_P3312_STR-FSTAT sy-vline 
WA_P3312_STR-FSTA2 sy-vline 
WA_P3312_STR-RECGD sy-vline 
WA_P3312_STR-STOPP sy-vline 
WA_P3312_STR-OHSTS sy-vline 
WA_P3312_STR-CMPID sy-vline 
WA_P3312_STR-INJUY sy-vline 
WA_P3312_STR-DEGRE sy-vline 
WA_P3312_STR-DEGR2 sy-vline 
WA_P3312_STR-ALWC1 sy-vline 
WA_P3312_STR-ALWT1 sy-vline 
WA_P3312_STR-AMTV1 sy-vline 
WA_P3312_STR-CURR1 sy-vline 
WA_P3312_STR-ALWC2 sy-vline 
WA_P3312_STR-ALWT2 sy-vline 
WA_P3312_STR-AMTV2 sy-vline 
WA_P3312_STR-CURR2 sy-vline 
WA_P3312_STR-ALWC3 sy-vline 
WA_P3312_STR-ALWT3 sy-vline 
WA_P3312_STR-AMTV3 sy-vline 
WA_P3312_STR-CURR3 sy-vline 
WA_P3312_STR-ALWC4 sy-vline 
WA_P3312_STR-ALWT4 sy-vline 
WA_P3312_STR-AMTV4 sy-vline 
WA_P3312_STR-CURR4 sy-vline 
WA_P3312_STR-ALWC5 sy-vline 
WA_P3312_STR-ALWT5 sy-vline 
WA_P3312_STR-AMTV5 sy-vline 
WA_P3312_STR-CURR5 sy-vline 
WA_P3312_STR-CURRY sy-vline 
WA_P3312_STR-LUMWY sy-vline 
WA_P3312_STR-PAYDT sy-vline 
WA_P3312_STR-BONDT sy-vline 
WA_P3312_STR-LGART sy-vline 
WA_P3312_STR-COMAM sy-vline 
WA_P3312_STR-INDNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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