ABAP Select data from SAP table PIQAGR_APPRCHANGE_REQUEST_WF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQAGR_APPRCHANGE_REQUEST_WF 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_APPRCHANGE_REQUEST_WF. 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_APPRCHANGE_REQUEST_WF 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_APPRCHANGE_REQUEST_WF TYPE STANDARD TABLE OF PIQAGR_APPRCHANGE_REQUEST_WF,
      WA_PIQAGR_APPRCHANGE_REQUEST_WF TYPE PIQAGR_APPRCHANGE_REQUEST_WF,
      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_APPRCHANGE_REQUEST_WF> TYPE PIQAGR_APPRCHANGE_REQUEST_WF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQAGR_APPRCHANGE_REQUEST_WF
*  INTO TABLE @DATA(IT_PIQAGR_APPRCHANGE_REQUEST_WF2).
*--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_APPRCHANGE_REQUEST_WF INDEX 1 INTO DATA(WA_PIQAGR_APPRCHANGE_REQUEST_WF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQAGR_APPRCHANGE_REQUEST_WF>-WI_ID = 1.
<PIQAGR_APPRCHANGE_REQUEST_WF>-SMOBJID = 1.
<PIQAGR_APPRCHANGE_REQUEST_WF>-MODREG_ID = 1.
<PIQAGR_APPRCHANGE_REQUEST_WF>-SMSTATUS = 1.
<PIQAGR_APPRCHANGE_REQUEST_WF>-SMSTATUST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQAGR_APPRCHANGE_REQUEST_WF-SMSHORT, sy-vline,
  WA_PIQAGR_APPRCHANGE_REQUEST_WF-SMSTEXT, sy-vline,
  WA_PIQAGR_APPRCHANGE_REQUEST_WF-AGRID, sy-vline,
  WA_PIQAGR_APPRCHANGE_REQUEST_WF-ATTNO, sy-vline,
  WA_PIQAGR_APPRCHANGE_REQUEST_WF-AGRTYPE, sy-vline,
  WA_PIQAGR_APPRCHANGE_REQUEST_WF-AGRSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQAGR_APPRCHANGE_REQUEST_WF 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_APPRCHANGE_REQUEST_WF 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_APPRCHANGE_REQUEST_WF INTO WA_PIQAGR_APPRCHANGE_REQUEST_WF.


*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_PIQAGR_APPRCHANGE_REQUEST_WF_STR, 
WI_ID TYPE STRING,
SMOBJID TYPE STRING,
MODREG_ID TYPE STRING,
SMSTATUS TYPE STRING,
SMSTATUST TYPE STRING,
SMSHORT TYPE STRING,
SMSTEXT TYPE STRING,
AGRID TYPE STRING,
ATTNO TYPE STRING,
AGRTYPE TYPE STRING,
AGRSTAT TYPE STRING,
ARCH_STATUS TYPE STRING,
AGRREMARK TYPE STRING,
AYEAR TYPE STRING,
APERIOD TYPE STRING,
AGRBEGDA TYPE STRING,
AGRENDDA TYPE STRING,
AGRDATEE TYPE STRING,
AGRDATEL TYPE STRING,
AGRWEIGHT TYPE STRING,
UPAGRID TYPE STRING,
LAST_DAY_ATT TYPE STRING,
GRADESYM TYPE STRING,
GRADE TYPE STRING,
GRADESCALE TYPE STRING,
AGRNOTRATED TYPE STRING,
AGRDATE TYPE STRING,
AGRCOMPLETED TYPE STRING,
NOTEID TYPE STRING,
REGNUM TYPE STRING,
GRADECHANGED TYPE STRING,
PUBLICATIONDATE TYPE STRING,
OTYPE TYPE STRING,
REALO TYPE STRING,
PLVAR TYPE STRING,
GRADSYMTEXT TYPE STRING,
GRADESCALETEXT TYPE STRING,
AGRTEXTTXT TYPE STRING,
AGRSTATTEXT TYPE STRING,
AGRREMARKTEXT TYPE STRING,
APPSERTEXT TYPE STRING,
AYEARTEXT TYPE STRING,
APERIODTEXT TYPE STRING,
REQ_GRADESYM TYPE STRING,
REQ_GRADESCALE TYPE STRING,
REQ_GRADE TYPE STRING,
REQ_AGRREMARK TYPE STRING,
REQ_AGRSTAT TYPE STRING,
REQ_GRADESYMTEXT TYPE STRING,
REQ_GRADESCALETEXT TYPE STRING,
REQ_AGRSTATTEXT TYPE STRING,
REQ_AGRREMARKTEXT TYPE STRING,
APPPOVED_GRADESYM TYPE STRING,
APPPOVED_GRADESCALE TYPE STRING,
APPPOVED_GRADE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQAGR_APPRCHANGE_REQUEST_WF_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_APPRCHANGE_REQUEST_WF_STR-WI_ID sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-SMOBJID sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-MODREG_ID sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-SMSTATUS sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-SMSTATUST sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-SMSHORT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-SMSTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRID sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-ATTNO sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRTYPE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRSTAT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-ARCH_STATUS sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRREMARK sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AYEAR sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-APERIOD sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRBEGDA sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRENDDA sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRDATEE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRDATEL sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRWEIGHT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-UPAGRID sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-LAST_DAY_ATT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-GRADESYM sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-GRADE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-GRADESCALE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRNOTRATED sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRDATE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRCOMPLETED sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-NOTEID sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REGNUM sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-GRADECHANGED sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-PUBLICATIONDATE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-OTYPE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REALO sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-PLVAR sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-GRADSYMTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-GRADESCALETEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRTEXTTXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRSTATTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AGRREMARKTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-APPSERTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-AYEARTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-APERIODTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_GRADESYM sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_GRADESCALE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_GRADE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_AGRREMARK sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_AGRSTAT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_GRADESYMTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_GRADESCALETEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_AGRSTATTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-REQ_AGRREMARKTEXT sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-APPPOVED_GRADESYM sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-APPPOVED_GRADESCALE sy-vline 
WA_PIQAGR_APPRCHANGE_REQUEST_WF_STR-APPPOVED_GRADE sy-vline      INTO ld_text SEPARATED BY SPACE.

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