ABAP Select data from SAP table ADA_PDTAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ADA_PDTAB
*  INTO TABLE @DATA(IT_ADA_PDTAB2).
*--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_ADA_PDTAB INDEX 1 INTO DATA(WA_ADA_PDTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ADA_PDTAB>-WDAY = 1.
<ADA_PDTAB>-DATUM = 1.
<ADA_PDTAB>-TIME = 1.
<ADA_PDTAB>-DATAHIT = 1.
<ADA_PDTAB>-CATHIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ADA_PDTAB-TEMPHIT, sy-vline,
  WA_ADA_PDTAB-USERCALLS, sy-vline,
  WA_ADA_PDTAB-ROLLBACKS, sy-vline,
  WA_ADA_PDTAB-COMMITS, sy-vline,
  WA_ADA_PDTAB-PREPARES, sy-vline,
  WA_ADA_PDTAB-TABSCANS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ADA_PDTAB 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_ADA_PDTAB 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_ADA_PDTAB INTO WA_ADA_PDTAB.


*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_ADA_PDTAB_STR, 
WDAY TYPE STRING,
DATUM TYPE STRING,
TIME TYPE STRING,
DATAHIT TYPE STRING,
CATHIT TYPE STRING,
TEMPHIT TYPE STRING,
USERCALLS TYPE STRING,
ROLLBACKS TYPE STRING,
COMMITS TYPE STRING,
PREPARES TYPE STRING,
TABSCANS TYPE STRING,
PHYREADS TYPE STRING,
PHYWRITES TYPE STRING,
LOGPAGES TYPE STRING,
LOCKCOLL TYPE STRING,
CONVHIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ADA_PDTAB_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_ADA_PDTAB_STR-WDAY sy-vline 
WA_ADA_PDTAB_STR-DATUM sy-vline 
WA_ADA_PDTAB_STR-TIME sy-vline 
WA_ADA_PDTAB_STR-DATAHIT sy-vline 
WA_ADA_PDTAB_STR-CATHIT sy-vline 
WA_ADA_PDTAB_STR-TEMPHIT sy-vline 
WA_ADA_PDTAB_STR-USERCALLS sy-vline 
WA_ADA_PDTAB_STR-ROLLBACKS sy-vline 
WA_ADA_PDTAB_STR-COMMITS sy-vline 
WA_ADA_PDTAB_STR-PREPARES sy-vline 
WA_ADA_PDTAB_STR-TABSCANS sy-vline 
WA_ADA_PDTAB_STR-PHYREADS sy-vline 
WA_ADA_PDTAB_STR-PHYWRITES sy-vline 
WA_ADA_PDTAB_STR-LOGPAGES sy-vline 
WA_ADA_PDTAB_STR-LOCKCOLL sy-vline 
WA_ADA_PDTAB_STR-CONVHIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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