ABAP Select data from SAP table PIQAP_RESINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQAP_RESINFO
*  INTO TABLE @DATA(IT_PIQAP_RESINFO2).
*--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_PIQAP_RESINFO INDEX 1 INTO DATA(WA_PIQAP_RESINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQAP_RESINFO>-PLVAR = 1.
<PIQAP_RESINFO>-OTYPE = 1.
<PIQAP_RESINFO>-OBJID = 1.
<PIQAP_RESINFO>-PERYR = 1.
<PIQAP_RESINFO>-PERID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQAP_RESINFO-MINIMUM, sy-vline,
  WA_PIQAP_RESINFO-OPTIMUM, sy-vline,
  WA_PIQAP_RESINFO-MAXIMUM, sy-vline,
  WA_PIQAP_RESINFO-RESERVED, sy-vline,
  WA_PIQAP_RESINFO-BOOKED, sy-vline,
  WA_PIQAP_RESINFO-REQ_RESERVED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQAP_RESINFO 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_PIQAP_RESINFO 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_PIQAP_RESINFO INTO WA_PIQAP_RESINFO.


*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_PIQAP_RESINFO_STR, 
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
PERYR TYPE STRING,
PERID TYPE STRING,
MINIMUM TYPE STRING,
OPTIMUM TYPE STRING,
MAXIMUM TYPE STRING,
RESERVED TYPE STRING,
BOOKED TYPE STRING,
REQ_RESERVED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQAP_RESINFO_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_PIQAP_RESINFO_STR-PLVAR sy-vline 
WA_PIQAP_RESINFO_STR-OTYPE sy-vline 
WA_PIQAP_RESINFO_STR-OBJID sy-vline 
WA_PIQAP_RESINFO_STR-PERYR sy-vline 
WA_PIQAP_RESINFO_STR-PERID sy-vline 
WA_PIQAP_RESINFO_STR-MINIMUM sy-vline 
WA_PIQAP_RESINFO_STR-OPTIMUM sy-vline 
WA_PIQAP_RESINFO_STR-MAXIMUM sy-vline 
WA_PIQAP_RESINFO_STR-RESERVED sy-vline 
WA_PIQAP_RESINFO_STR-BOOKED sy-vline 
WA_PIQAP_RESINFO_STR-REQ_RESERVED sy-vline      INTO ld_text SEPARATED BY SPACE.

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