ABAP Select data from SAP table PIQ_ACTIVITY_DOCUMENT_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_ACTIVITY_DOCUMENT_LIST
*  INTO TABLE @DATA(IT_PIQ_ACTIVITY_DOCUMENT_LIST2).
*--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_PIQ_ACTIVITY_DOCUMENT_LIST INDEX 1 INTO DATA(WA_PIQ_ACTIVITY_DOCUMENT_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_ACTIVITY_DOCUMENT_LIST>-PERNR = 1.
<PIQ_ACTIVITY_DOCUMENT_LIST>-PERNR = 1.
<PIQ_ACTIVITY_DOCUMENT_LIST>-USER = 1.
<PIQ_ACTIVITY_DOCUMENT_LIST>-BEGDA = 1.
<PIQ_ACTIVITY_DOCUMENT_LIST>-ENDDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_ACTIVITY_DOCUMENT_LIST-CREATE_USER_NAME, sy-vline,
  WA_PIQ_ACTIVITY_DOCUMENT_LIST-DOCID, sy-vline,
  WA_PIQ_ACTIVITY_DOCUMENT_LIST-PROCESS, sy-vline,
  WA_PIQ_ACTIVITY_DOCUMENT_LIST-REASON, sy-vline,
  WA_PIQ_ACTIVITY_DOCUMENT_LIST-KEY_DATE, sy-vline,
  WA_PIQ_ACTIVITY_DOCUMENT_LIST-KEY_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_ACTIVITY_DOCUMENT_LIST 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_PIQ_ACTIVITY_DOCUMENT_LIST 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_PIQ_ACTIVITY_DOCUMENT_LIST INTO WA_PIQ_ACTIVITY_DOCUMENT_LIST.


*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 ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ACTIVITY_DOCUMENT_LIST-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ACTIVITY_DOCUMENT_LIST-LOGSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PIQST, internal->external for field STUDENT12
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ACTIVITY_DOCUMENT_LIST-STUDENT12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ACTIVITY_DOCUMENT_LIST-STUDENT12.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REF_LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ACTIVITY_DOCUMENT_LIST-REF_LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ACTIVITY_DOCUMENT_LIST-REF_LOGSYSTEM.
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_PIQ_ACTIVITY_DOCUMENT_LIST_STR, 
PERNR TYPE STRING,
PERNR TYPE STRING,
USER TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CREATE_USER_NAME TYPE STRING,
DOCID TYPE STRING,
PROCESS TYPE STRING,
REASON TYPE STRING,
KEY_DATE TYPE STRING,
KEY_TIME TYPE STRING,
KEY_TIMEZONE TYPE STRING,
PROCESST TYPE STRING,
REASONTEXT TYPE STRING,
TIMESTAMP TYPE STRING,
TIMESTAMP_DATE TYPE STRING,
TIMESTAMP_TIME TYPE STRING,
UNAME TYPE STRING,
LOGSYSTEM TYPE STRING,
CM_RELEASE TYPE STRING,
ARCHIVED TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ST_OBJID TYPE STRING,
SCSRK TYPE STRING,
SCTEXT TYPE STRING,
SMSRK TYPE STRING,
SMTEXT TYPE STRING,
STUDENT12 TYPE STRING,
NAME TYPE STRING,
BEGDA TYPE STRING,
BEGPERYR TYPE STRING,
BEGPERID TYPE STRING,
ENDDA TYPE STRING,
ENDPERYR TYPE STRING,
ENDPERID TYPE STRING,
BEGPERYT TYPE STRING,
BEGPERIT TYPE STRING,
ENDPERYT TYPE STRING,
ENDPERIT TYPE STRING,
REF_DOCID TYPE STRING,
REF_PROCESS TYPE STRING,
REF_LOGSYSTEM TYPE STRING,
REF_PROCESST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_ACTIVITY_DOCUMENT_LIST_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_PIQ_ACTIVITY_DOCUMENT_LIST_STR-PERNR sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-PERNR sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-USER sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-BEGDA sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ENDDA sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-CREATE_USER_NAME sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-DOCID sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-PROCESS sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-REASON sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-KEY_DATE sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-KEY_TIME sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-KEY_TIMEZONE sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-PROCESST sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-REASONTEXT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-TIMESTAMP sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-TIMESTAMP_DATE sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-TIMESTAMP_TIME sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-UNAME sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-LOGSYSTEM sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-CM_RELEASE sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ARCHIVED sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-PLVAR sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-OTYPE sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-OBJID sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ST_OBJID sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-SCSRK sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-SCTEXT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-SMSRK sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-SMTEXT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-STUDENT12 sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-NAME sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-BEGDA sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-BEGPERYR sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-BEGPERID sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ENDDA sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ENDPERYR sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ENDPERID sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-BEGPERYT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-BEGPERIT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ENDPERYT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-ENDPERIT sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-REF_DOCID sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-REF_PROCESS sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-REF_LOGSYSTEM sy-vline 
WA_PIQ_ACTIVITY_DOCUMENT_LIST_STR-REF_PROCESST sy-vline      INTO ld_text SEPARATED BY SPACE.

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