ABAP Select data from SAP table PIQRFC_RELATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQRFC_RELATION
*  INTO TABLE @DATA(IT_PIQRFC_RELATION2).
*--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_PIQRFC_RELATION INDEX 1 INTO DATA(WA_PIQRFC_RELATION2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQRFC_RELATION-ISTAT, sy-vline,
  WA_PIQRFC_RELATION-BEGDA, sy-vline,
  WA_PIQRFC_RELATION-ENDDA, sy-vline,
  WA_PIQRFC_RELATION-VARYF, sy-vline,
  WA_PIQRFC_RELATION-SEQNR, sy-vline,
  WA_PIQRFC_RELATION-RSIGN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQRFC_RELATION 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_PIQRFC_RELATION 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_PIQRFC_RELATION INTO WA_PIQRFC_RELATION.


*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_PIQRFC_RELATION_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
RSIGN TYPE STRING,
RELAT TYPE STRING,
SCLAS TYPE STRING,
SOBID TYPE STRING,
REL_OBJ_SHORT TYPE STRING,
REL_OBJ_STEXT TYPE STRING,
ADATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQRFC_RELATION_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_PIQRFC_RELATION_STR-MANDT sy-vline 
WA_PIQRFC_RELATION_STR-PLVAR sy-vline 
WA_PIQRFC_RELATION_STR-OTYPE sy-vline 
WA_PIQRFC_RELATION_STR-OBJID sy-vline 
WA_PIQRFC_RELATION_STR-SUBTY sy-vline 
WA_PIQRFC_RELATION_STR-ISTAT sy-vline 
WA_PIQRFC_RELATION_STR-BEGDA sy-vline 
WA_PIQRFC_RELATION_STR-ENDDA sy-vline 
WA_PIQRFC_RELATION_STR-VARYF sy-vline 
WA_PIQRFC_RELATION_STR-SEQNR sy-vline 
WA_PIQRFC_RELATION_STR-RSIGN sy-vline 
WA_PIQRFC_RELATION_STR-RELAT sy-vline 
WA_PIQRFC_RELATION_STR-SCLAS sy-vline 
WA_PIQRFC_RELATION_STR-SOBID sy-vline 
WA_PIQRFC_RELATION_STR-REL_OBJ_SHORT sy-vline 
WA_PIQRFC_RELATION_STR-REL_OBJ_STEXT sy-vline 
WA_PIQRFC_RELATION_STR-ADATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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