ABAP Select data from SAP table P06_DSN_B2A_HIST_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P06_DSN_B2A_HIST_ALV 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 P06_DSN_B2A_HIST_ALV. 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 P06_DSN_B2A_HIST_ALV 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_P06_DSN_B2A_HIST_ALV TYPE STANDARD TABLE OF P06_DSN_B2A_HIST_ALV,
      WA_P06_DSN_B2A_HIST_ALV TYPE P06_DSN_B2A_HIST_ALV,
      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: <P06_DSN_B2A_HIST_ALV> TYPE P06_DSN_B2A_HIST_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P06_DSN_B2A_HIST_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P06_DSN_B2A_HIST_ALV
  INTO TABLE IT_P06_DSN_B2A_HIST_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P06_DSN_B2A_HIST_ALV
*  INTO TABLE @DATA(IT_P06_DSN_B2A_HIST_ALV2).
*--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_P06_DSN_B2A_HIST_ALV INDEX 1 INTO DATA(WA_P06_DSN_B2A_HIST_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P06_DSN_B2A_HIST_ALV ASSIGNING <P06_DSN_B2A_HIST_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P06_DSN_B2A_HIST_ALV>-ICON = 1.
<P06_DSN_B2A_HIST_ALV>-STATUS_TEXT = 1.
<P06_DSN_B2A_HIST_ALV>-SEQNO = 1.
<P06_DSN_B2A_HIST_ALV>-STATS = 1.
<P06_DSN_B2A_HIST_ALV>-SDATE = 1.

ENDLOOP.

LOOP AT IT_P06_DSN_B2A_HIST_ALV INTO WA_P06_DSN_B2A_HIST_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P06_DSN_B2A_HIST_ALV-STIME, sy-vline,
  WA_P06_DSN_B2A_HIST_ALV-UNAME, sy-vline,
  WA_P06_DSN_B2A_HIST_ALV-STEPI, sy-vline,
  WA_P06_DSN_B2A_HIST_ALV-STEPT, sy-vline,
  WA_P06_DSN_B2A_HIST_ALV-OPS, sy-vline,
  WA_P06_DSN_B2A_HIST_ALV-ADDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P06_DSN_B2A_HIST_ALV 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_P06_DSN_B2A_HIST_ALV 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_P06_DSN_B2A_HIST_ALV INTO WA_P06_DSN_B2A_HIST_ALV.


*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_P06_DSN_B2A_HIST_ALV_STR, 
ICON TYPE STRING,
STATUS_TEXT TYPE STRING,
SEQNO TYPE STRING,
STATS TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
UNAME TYPE STRING,
STEPI TYPE STRING,
STEPT TYPE STRING,
OPS TYPE STRING,
ADDAT TYPE STRING,
DISPLAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P06_DSN_B2A_HIST_ALV_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_P06_DSN_B2A_HIST_ALV_STR-ICON sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-STATUS_TEXT sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-SEQNO sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-STATS sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-SDATE sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-STIME sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-UNAME sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-STEPI sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-STEPT sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-OPS sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-ADDAT sy-vline 
WA_P06_DSN_B2A_HIST_ALV_STR-DISPLAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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