ABAP Select data from SAP table PIQAD_ADH_LIST_BUFF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQAD_ADH_LIST_BUFF
*  INTO TABLE @DATA(IT_PIQAD_ADH_LIST_BUFF2).
*--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_PIQAD_ADH_LIST_BUFF INDEX 1 INTO DATA(WA_PIQAD_ADH_LIST_BUFF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQAD_ADH_LIST_BUFF>-APPLICANT_ID = 1.
<PIQAD_ADH_LIST_BUFF>-ADH_LIST_T = 1.
<PIQAD_ADH_LIST_BUFF>-DECISION_ID = 1.
<PIQAD_ADH_LIST_BUFF>-DECISION_TEXT = 1.
<PIQAD_ADH_LIST_BUFF>-APPLICANT_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQAD_ADH_LIST_BUFF-APPLICANT_NAME, sy-vline,
  WA_PIQAD_ADH_LIST_BUFF-ADP_SHORT_TEXT, sy-vline,
  WA_PIQAD_ADH_LIST_BUFF-ADM_APPLICATION, sy-vline,
  WA_PIQAD_ADH_LIST_BUFF-STATUS, sy-vline,
  WA_PIQAD_ADH_LIST_BUFF-STATUS_TXT, sy-vline,
  WA_PIQAD_ADH_LIST_BUFF-PERYR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQAD_ADH_LIST_BUFF 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_PIQAD_ADH_LIST_BUFF 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_PIQAD_ADH_LIST_BUFF INTO WA_PIQAD_ADH_LIST_BUFF.


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

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

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

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

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

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

*Conversion exit PDATE, internal->external for field BIRTHDATE
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PIQAD_ADH_LIST_BUFF-BIRTHDATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQAD_ADH_LIST_BUFF-BIRTHDATE.
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_PIQAD_ADH_LIST_BUFF_STR, 
APPLICANT_ID TYPE STRING,
ADH_LIST_T TYPE STRING,
DECISION_ID TYPE STRING,
DECISION_TEXT TYPE STRING,
APPLICANT_ID TYPE STRING,
APPLICANT_NAME TYPE STRING,
ADP_SHORT_TEXT TYPE STRING,
ADM_APPLICATION TYPE STRING,
STATUS TYPE STRING,
STATUS_TXT TYPE STRING,
PERYR TYPE STRING,
PERYT TYPE STRING,
PERID TYPE STRING,
PERIT TYPE STRING,
ADP_ID TYPE STRING,
ADP_TYPE TYPE STRING,
S0_TYPE TYPE STRING,
S0_TYPET TYPE STRING,
ADH_TYPE TYPE STRING,
ADH_TYPET TYPE STRING,
SUBJECT_SEM TYPE STRING,
PREDECESSOR TYPE STRING,
ADI_REF_TEXT TYPE STRING,
BIRTHDATE TYPE STRING,
CATEGORYT TYPE STRING,
SUB_CATEGORYT TYPE STRING,
DECISION_DATE TYPE STRING,
PRIORITY TYPE STRING,
CATEGORY TYPE STRING,
SUB_CATEGORY TYPE STRING,
CLASSIFICATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQAD_ADH_LIST_BUFF_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_PIQAD_ADH_LIST_BUFF_STR-APPLICANT_ID sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADH_LIST_T sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-DECISION_ID sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-DECISION_TEXT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-APPLICANT_ID sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-APPLICANT_NAME sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADP_SHORT_TEXT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADM_APPLICATION sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-STATUS sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-STATUS_TXT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-PERYR sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-PERYT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-PERID sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-PERIT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADP_ID sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADP_TYPE sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-S0_TYPE sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-S0_TYPET sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADH_TYPE sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADH_TYPET sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-SUBJECT_SEM sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-PREDECESSOR sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-ADI_REF_TEXT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-BIRTHDATE sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-CATEGORYT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-SUB_CATEGORYT sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-DECISION_DATE sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-PRIORITY sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-CATEGORY sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-SUB_CATEGORY sy-vline 
WA_PIQAD_ADH_LIST_BUFF_STR-CLASSIFICATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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