ABAP Select data from SAP table P1953 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P1953 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 P1953. 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 P1953 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_P1953 TYPE STANDARD TABLE OF P1953,
      WA_P1953 TYPE P1953,
      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: <P1953> TYPE P1953.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P1953.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P1953
  INTO TABLE IT_P1953.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P1953
*  INTO TABLE @DATA(IT_P19532).
*--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_P1953 INDEX 1 INTO DATA(WA_P19532).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P1953 ASSIGNING <P1953>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P1953>-MANDT = 1.
<P1953>-PLVAR = 1.
<P1953>-OTYPE = 1.
<P1953>-OBJID = 1.
<P1953>-INFTY = 1.

ENDLOOP.

LOOP AT IT_P1953 INTO WA_P1953.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P1953-SUBTY, sy-vline,
  WA_P1953-ISTAT, sy-vline,
  WA_P1953-PRIOX, sy-vline,
  WA_P1953-BEGDA, sy-vline,
  WA_P1953-ENDDA, sy-vline,
  WA_P1953-VARYF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P1953 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_P1953 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_P1953 INTO WA_P1953.


*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_P1953_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
REASN TYPE STRING,
HISTO TYPE STRING,
ITXNR TYPE STRING,
PS_KEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P1953_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_P1953_STR-MANDT sy-vline 
WA_P1953_STR-PLVAR sy-vline 
WA_P1953_STR-OTYPE sy-vline 
WA_P1953_STR-OBJID sy-vline 
WA_P1953_STR-INFTY sy-vline 
WA_P1953_STR-SUBTY sy-vline 
WA_P1953_STR-ISTAT sy-vline 
WA_P1953_STR-PRIOX sy-vline 
WA_P1953_STR-BEGDA sy-vline 
WA_P1953_STR-ENDDA sy-vline 
WA_P1953_STR-VARYF sy-vline 
WA_P1953_STR-SEQNR sy-vline 
WA_P1953_STR-AEDTM sy-vline 
WA_P1953_STR-UNAME sy-vline 
WA_P1953_STR-REASN sy-vline 
WA_P1953_STR-HISTO sy-vline 
WA_P1953_STR-ITXNR sy-vline 
WA_P1953_STR-PS_KEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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