ABAP Select data from SAP table ERRO_APPL_LOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERRO_APPL_LOG
*  INTO TABLE @DATA(IT_ERRO_APPL_LOG2).
*--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_ERRO_APPL_LOG INDEX 1 INTO DATA(WA_ERRO_APPL_LOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERRO_APPL_LOG>-MATNR = 1.
<ERRO_APPL_LOG>-VRKME = 1.
<ERRO_APPL_LOG>-EAN11 = 1.
<ERRO_APPL_LOG>-VKORG = 1.
<ERRO_APPL_LOG>-VTWEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERRO_APPL_LOG-WERKS, sy-vline,
  WA_ERRO_APPL_LOG-PLTYP, sy-vline,
  WA_ERRO_APPL_LOG-BGINT, sy-vline,
  WA_ERRO_APPL_LOG-VLGWK, sy-vline,
  WA_ERRO_APPL_LOG-CLASS, sy-vline,
  WA_ERRO_APPL_LOG-MSGID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERRO_APPL_LOG 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_ERRO_APPL_LOG 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_ERRO_APPL_LOG INTO WA_ERRO_APPL_LOG.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ERRO_APPL_LOG-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERRO_APPL_LOG-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ERRO_APPL_LOG-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERRO_APPL_LOG-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_ERRO_APPL_LOG-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERRO_APPL_LOG-EAN11.
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_ERRO_APPL_LOG_STR, 
MATNR TYPE STRING,
VRKME TYPE STRING,
EAN11 TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
WERKS TYPE STRING,
PLTYP TYPE STRING,
BGINT TYPE STRING,
VLGWK TYPE STRING,
CLASS TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERRO_APPL_LOG_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_ERRO_APPL_LOG_STR-MATNR sy-vline 
WA_ERRO_APPL_LOG_STR-VRKME sy-vline 
WA_ERRO_APPL_LOG_STR-EAN11 sy-vline 
WA_ERRO_APPL_LOG_STR-VKORG sy-vline 
WA_ERRO_APPL_LOG_STR-VTWEG sy-vline 
WA_ERRO_APPL_LOG_STR-WERKS sy-vline 
WA_ERRO_APPL_LOG_STR-PLTYP sy-vline 
WA_ERRO_APPL_LOG_STR-BGINT sy-vline 
WA_ERRO_APPL_LOG_STR-VLGWK sy-vline 
WA_ERRO_APPL_LOG_STR-CLASS sy-vline 
WA_ERRO_APPL_LOG_STR-MSGID sy-vline 
WA_ERRO_APPL_LOG_STR-MSGNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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