ABAP Select data from SAP table P3377 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P3377 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 P3377. 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 P3377 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_P3377 TYPE STANDARD TABLE OF P3377,
      WA_P3377 TYPE P3377,
      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: <P3377> TYPE P3377.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P3377.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P3377
  INTO TABLE IT_P3377.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P3377
*  INTO TABLE @DATA(IT_P33772).
*--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_P3377 INDEX 1 INTO DATA(WA_P33772).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P3377 ASSIGNING <P3377>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P3377>-PERNR = 1.
<P3377>-INFTY = 1.
<P3377>-SUBTY = 1.
<P3377>-OBJPS = 1.
<P3377>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P3377 INTO WA_P3377.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P3377-ENDDA, sy-vline,
  WA_P3377-BEGDA, sy-vline,
  WA_P3377-SEQNR, sy-vline,
  WA_P3377-AEDTM, sy-vline,
  WA_P3377-UNAME, sy-vline,
  WA_P3377-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P3377 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_P3377 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_P3377 INTO WA_P3377.


*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_P3377_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,
RSK01 TYPE STRING,
PRO01 TYPE STRING,
EXC01 TYPE STRING,
RSK02 TYPE STRING,
PRO02 TYPE STRING,
EXC02 TYPE STRING,
RSK03 TYPE STRING,
PRO03 TYPE STRING,
EXC03 TYPE STRING,
RSK04 TYPE STRING,
PRO04 TYPE STRING,
EXC04 TYPE STRING,
RSK05 TYPE STRING,
PRO05 TYPE STRING,
EXC05 TYPE STRING,
RSK06 TYPE STRING,
PRO06 TYPE STRING,
EXC06 TYPE STRING,
RSK07 TYPE STRING,
PRO07 TYPE STRING,
EXC07 TYPE STRING,
RSK08 TYPE STRING,
PRO08 TYPE STRING,
EXC08 TYPE STRING,
RSK09 TYPE STRING,
PRO09 TYPE STRING,
EXC09 TYPE STRING,
RSK10 TYPE STRING,
PRO10 TYPE STRING,
EXC10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P3377_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_P3377_STR-PERNR sy-vline 
WA_P3377_STR-INFTY sy-vline 
WA_P3377_STR-SUBTY sy-vline 
WA_P3377_STR-OBJPS sy-vline 
WA_P3377_STR-SPRPS sy-vline 
WA_P3377_STR-ENDDA sy-vline 
WA_P3377_STR-BEGDA sy-vline 
WA_P3377_STR-SEQNR sy-vline 
WA_P3377_STR-AEDTM sy-vline 
WA_P3377_STR-UNAME sy-vline 
WA_P3377_STR-HISTO sy-vline 
WA_P3377_STR-ITXEX sy-vline 
WA_P3377_STR-REFEX sy-vline 
WA_P3377_STR-ORDEX sy-vline 
WA_P3377_STR-ITBLD sy-vline 
WA_P3377_STR-PREAS sy-vline 
WA_P3377_STR-FLAG1 sy-vline 
WA_P3377_STR-FLAG2 sy-vline 
WA_P3377_STR-FLAG3 sy-vline 
WA_P3377_STR-FLAG4 sy-vline 
WA_P3377_STR-RESE1 sy-vline 
WA_P3377_STR-RESE2 sy-vline 
WA_P3377_STR-GRPVL sy-vline 
WA_P3377_STR-RSK01 sy-vline 
WA_P3377_STR-PRO01 sy-vline 
WA_P3377_STR-EXC01 sy-vline 
WA_P3377_STR-RSK02 sy-vline 
WA_P3377_STR-PRO02 sy-vline 
WA_P3377_STR-EXC02 sy-vline 
WA_P3377_STR-RSK03 sy-vline 
WA_P3377_STR-PRO03 sy-vline 
WA_P3377_STR-EXC03 sy-vline 
WA_P3377_STR-RSK04 sy-vline 
WA_P3377_STR-PRO04 sy-vline 
WA_P3377_STR-EXC04 sy-vline 
WA_P3377_STR-RSK05 sy-vline 
WA_P3377_STR-PRO05 sy-vline 
WA_P3377_STR-EXC05 sy-vline 
WA_P3377_STR-RSK06 sy-vline 
WA_P3377_STR-PRO06 sy-vline 
WA_P3377_STR-EXC06 sy-vline 
WA_P3377_STR-RSK07 sy-vline 
WA_P3377_STR-PRO07 sy-vline 
WA_P3377_STR-EXC07 sy-vline 
WA_P3377_STR-RSK08 sy-vline 
WA_P3377_STR-PRO08 sy-vline 
WA_P3377_STR-EXC08 sy-vline 
WA_P3377_STR-RSK09 sy-vline 
WA_P3377_STR-PRO09 sy-vline 
WA_P3377_STR-EXC09 sy-vline 
WA_P3377_STR-RSK10 sy-vline 
WA_P3377_STR-PRO10 sy-vline 
WA_P3377_STR-EXC10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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