ABAP Select data from SAP table RN1MESSAGE into internal table
Get Example source ABAP code based on a different SAP table
Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1MESSAGE 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 RN1MESSAGE. 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 RN1MESSAGE 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_RN1MESSAGE TYPE STANDARD TABLE OF RN1MESSAGE, WA_RN1MESSAGE TYPE RN1MESSAGE, 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: <RN1MESSAGE> TYPE RN1MESSAGE. *Process all fields in table header/work area as string values PERFORM process_as_string_field_values CHANGING wa_RN1MESSAGE. SELECT * *restrict ABAP select to first 10 rows UP TO 10 ROWS FROM RN1MESSAGE INTO TABLE IT_RN1MESSAGE. *Select data and declare internal table using in-line method @DATA *SELECT * * FROM RN1MESSAGE * INTO TABLE @DATA(IT_RN1MESSAGE2). *--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_RN1MESSAGE INDEX 1 INTO DATA(WA_RN1MESSAGE2). *Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL LOOP AT IT_RN1MESSAGE ASSIGNING <RN1MESSAGE>.*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1MESSAGE>-TYPE = 1.
<RN1MESSAGE>-ID = 1.
<RN1MESSAGE>-NUMBER = 1.
<RN1MESSAGE>-MESSAGE = 1.
<RN1MESSAGE>-LOG_NO = 1.
ENDLOOP. LOOP AT IT_RN1MESSAGE INTO WA_RN1MESSAGE. *Write horizonal line to screen report. WRITE:/ sy-uline. *Write selected data to screen/report before conversion. WRITE:/ sy-vline, WA_RN1MESSAGE-LOG_MSG_NO, sy-vline,
WA_RN1MESSAGE-MESSAGE_V1, sy-vline,
WA_RN1MESSAGE-MESSAGE_V2, sy-vline,
WA_RN1MESSAGE-MESSAGE_V3, sy-vline,
WA_RN1MESSAGE-MESSAGE_V4, sy-vline,
WA_RN1MESSAGE-PARAMETER, sy-vline.
ENDLOOP. *Add any further fields from structure WA_RN1MESSAGE 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_RN1MESSAGE 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_RN1MESSAGE INTO WA_RN1MESSAGE. *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 SYSTEM CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_RN1MESSAGE-SYSTEM IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_RN1MESSAGE-SYSTEM.
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_RN1MESSAGE_STR,
TYPE TYPE STRING,
ID TYPE STRING,
NUMBER TYPE STRING,
MESSAGE TYPE STRING,
LOG_NO TYPE STRING,
LOG_MSG_NO TYPE STRING,
MESSAGE_V1 TYPE STRING,
MESSAGE_V2 TYPE STRING,
MESSAGE_V3 TYPE STRING,
MESSAGE_V4 TYPE STRING,
PARAMETER TYPE STRING,
ROW TYPE STRING,
FIELD TYPE STRING,
SYSTEM TYPE STRING,
OBJECT TYPE STRING,
LINE_KEY TYPE STRING,
ERROR_OBJ TYPE STRING,END OF T_EKKO_STR. DATA: WA_RN1MESSAGE_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_RN1MESSAGE_STR-TYPE sy-vline
WA_RN1MESSAGE_STR-ID sy-vline
WA_RN1MESSAGE_STR-NUMBER sy-vline
WA_RN1MESSAGE_STR-MESSAGE sy-vline
WA_RN1MESSAGE_STR-LOG_NO sy-vline
WA_RN1MESSAGE_STR-LOG_MSG_NO sy-vline
WA_RN1MESSAGE_STR-MESSAGE_V1 sy-vline
WA_RN1MESSAGE_STR-MESSAGE_V2 sy-vline
WA_RN1MESSAGE_STR-MESSAGE_V3 sy-vline
WA_RN1MESSAGE_STR-MESSAGE_V4 sy-vline
WA_RN1MESSAGE_STR-PARAMETER sy-vline
WA_RN1MESSAGE_STR-ROW sy-vline
WA_RN1MESSAGE_STR-FIELD sy-vline
WA_RN1MESSAGE_STR-SYSTEM sy-vline
WA_RN1MESSAGE_STR-OBJECT sy-vline
WA_RN1MESSAGE_STR-LINE_KEY sy-vline
WA_RN1MESSAGE_STR-ERROR_OBJ sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.