ABAP Select data from SAP table PIQAGR_BUFF_APPR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQAGR_BUFF_APPR
*  INTO TABLE @DATA(IT_PIQAGR_BUFF_APPR2).
*--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_PIQAGR_BUFF_APPR INDEX 1 INTO DATA(WA_PIQAGR_BUFF_APPR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQAGR_BUFF_APPR>-AGRIDAPP = 1.
<PIQAGR_BUFF_APPR>-ATTNOAPP = 1.
<PIQAGR_BUFF_APPR>-AGRTYPEAPP = 1.
<PIQAGR_BUFF_APPR>-AGRSTATAPP = 1.
<PIQAGR_BUFF_APPR>-ARCH_STATUSAPP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQAGR_BUFF_APPR-AGRREMARKAPP, sy-vline,
  WA_PIQAGR_BUFF_APPR-AYEARAPP, sy-vline,
  WA_PIQAGR_BUFF_APPR-APERIODAPP, sy-vline,
  WA_PIQAGR_BUFF_APPR-AGRBEGDAAPP, sy-vline,
  WA_PIQAGR_BUFF_APPR-AGRENDDAAPP, sy-vline,
  WA_PIQAGR_BUFF_APPR-AGRDATEEAPP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQAGR_BUFF_APPR 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_PIQAGR_BUFF_APPR 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_PIQAGR_BUFF_APPR INTO WA_PIQAGR_BUFF_APPR.


*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.

*Conversion exit ISOLA, internal->external for field LANGUTXT
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_PIQAGR_BUFF_APPR-LANGUTXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQAGR_BUFF_APPR-LANGUTXT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CPUNITFOL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PIQAGR_BUFF_APPR-CPUNITFOL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQAGR_BUFF_APPR-CPUNITFOL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PIQAGR_BUFF_APPR_STR, 
AGRIDAPP TYPE STRING,
ATTNOAPP TYPE STRING,
AGRTYPEAPP TYPE STRING,
AGRSTATAPP TYPE STRING,
ARCH_STATUSAPP TYPE STRING,
AGRREMARKAPP TYPE STRING,
AYEARAPP TYPE STRING,
APERIODAPP TYPE STRING,
AGRBEGDAAPP TYPE STRING,
AGRENDDAAPP TYPE STRING,
AGRDATEEAPP TYPE STRING,
AGRDATELAPP TYPE STRING,
AGRWEIGHTAPP TYPE STRING,
UPAGRIDAPP TYPE STRING,
LAST_DAY_ATTAPP TYPE STRING,
GRADESYMAPP TYPE STRING,
GRADEAPP TYPE STRING,
GRADESCALEAPP TYPE STRING,
AGRNOTRATEDAPP TYPE STRING,
AGRDATEAPP TYPE STRING,
AGRCOMPLETEDAPP TYPE STRING,
NOTEIDAPP TYPE STRING,
REGNUMAPP TYPE STRING,
GRADECHANGEDAPP TYPE STRING,
PUBLICATIONDATEAPP TYPE STRING,
AGRIDTXT TYPE STRING,
LANGUTXT TYPE STRING,
AGRTEXTTXT TYPE STRING,
AGRPLVARASG TYPE STRING,
AGROTYPEASG TYPE STRING,
AGRREALOASG TYPE STRING,
INFTYASG TYPE STRING,
RSIGNASG TYPE STRING,
RELATASG TYPE STRING,
ISTATASG TYPE STRING,
PRIOXASG TYPE STRING,
BEGDAASG TYPE STRING,
ENDDAASG TYPE STRING,
VARYFASG TYPE STRING,
SEQNRASG TYPE STRING,
SCLASASG TYPE STRING,
SOBIDASG TYPE STRING,
MODREG_IDASG TYPE STRING,
CPATTEMPFOL TYPE STRING,
CPEARNEDFOL TYPE STRING,
CPGRADEDFOL TYPE STRING,
CPUNITFOL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQAGR_BUFF_APPR_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_PIQAGR_BUFF_APPR_STR-AGRIDAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-ATTNOAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRTYPEAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRSTATAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-ARCH_STATUSAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRREMARKAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AYEARAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-APERIODAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRBEGDAAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRENDDAAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRDATEEAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRDATELAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRWEIGHTAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-UPAGRIDAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-LAST_DAY_ATTAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-GRADESYMAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-GRADEAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-GRADESCALEAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRNOTRATEDAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRDATEAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRCOMPLETEDAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-NOTEIDAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-REGNUMAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-GRADECHANGEDAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-PUBLICATIONDATEAPP sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRIDTXT sy-vline 
WA_PIQAGR_BUFF_APPR_STR-LANGUTXT sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRTEXTTXT sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRPLVARASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGROTYPEASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-AGRREALOASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-INFTYASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-RSIGNASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-RELATASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-ISTATASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-PRIOXASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-BEGDAASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-ENDDAASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-VARYFASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-SEQNRASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-SCLASASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-SOBIDASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-MODREG_IDASG sy-vline 
WA_PIQAGR_BUFF_APPR_STR-CPATTEMPFOL sy-vline 
WA_PIQAGR_BUFF_APPR_STR-CPEARNEDFOL sy-vline 
WA_PIQAGR_BUFF_APPR_STR-CPGRADEDFOL sy-vline 
WA_PIQAGR_BUFF_APPR_STR-CPUNITFOL sy-vline      INTO ld_text SEPARATED BY SPACE.

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