ABAP Select data from SAP table MDG_CDS_CHNGREC 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 MDG_CDS_CHNGREC 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 MDG_CDS_CHNGREC. 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 MDG_CDS_CHNGREC 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_MDG_CDS_CHNGREC TYPE STANDARD TABLE OF MDG_CDS_CHNGREC, WA_MDG_CDS_CHNGREC TYPE MDG_CDS_CHNGREC, 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: <MDG_CDS_CHNGREC> TYPE MDG_CDS_CHNGREC. *Process all fields in table header/work area as string values PERFORM process_as_string_field_values CHANGING wa_MDG_CDS_CHNGREC. SELECT * *restrict ABAP select to first 10 rows UP TO 10 ROWS FROM MDG_CDS_CHNGREC INTO TABLE IT_MDG_CDS_CHNGREC. *Select data and declare internal table using in-line method @DATA *SELECT * * FROM MDG_CDS_CHNGREC * INTO TABLE @DATA(IT_MDG_CDS_CHNGREC2). *--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_MDG_CDS_CHNGREC INDEX 1 INTO DATA(WA_MDG_CDS_CHNGREC2). *Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL LOOP AT IT_MDG_CDS_CHNGREC ASSIGNING <MDG_CDS_CHNGREC>.*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_CDS_CHNGREC>-MANDT = 1.
<MDG_CDS_CHNGREC>-USMD_MODEL = 1.
<MDG_CDS_CHNGREC>-DOCUMENT_ORIGIN = 1.
<MDG_CDS_CHNGREC>-CHANGEINDICATOR = 1.
<MDG_CDS_CHNGREC>-DOCUMENT_GUID = 1.
ENDLOOP. LOOP AT IT_MDG_CDS_CHNGREC INTO WA_MDG_CDS_CHNGREC. *Write horizonal line to screen report. WRITE:/ sy-uline. *Write selected data to screen/report before conversion. WRITE:/ sy-vline, WA_MDG_CDS_CHNGREC-USMD_CREQUEST, sy-vline,
WA_MDG_CDS_CHNGREC-USMD_ENTITY, sy-vline,
WA_MDG_CDS_CHNGREC-FIELDNAME, sy-vline,
WA_MDG_CDS_CHNGREC-BUSINESS_KEY, sy-vline,
WA_MDG_CDS_CHNGREC-LANGUAGE, sy-vline,
WA_MDG_CDS_CHNGREC-CHANGENR, sy-vline.
ENDLOOP. *Add any further fields from structure WA_MDG_CDS_CHNGREC 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_MDG_CDS_CHNGREC 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_MDG_CDS_CHNGREC INTO WA_MDG_CDS_CHNGREC. *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 USMD_CREQUEST CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDG_CDS_CHNGREC-USMD_CREQUEST IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDG_CDS_CHNGREC-USMD_CREQUEST.
WRITE:/ 'New Value:', ld_input.
*Conversion exit ISOLA, internal->external for field LANGUAGE CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT' EXPORTING input = WA_MDG_CDS_CHNGREC-LANGUAGE IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDG_CDS_CHNGREC-LANGUAGE.
WRITE:/ 'New Value:', ld_input.
*Conversion exit ALPHA, internal->external for field CHANGENR CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_MDG_CDS_CHNGREC-CHANGENR IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_MDG_CDS_CHNGREC-CHANGENR.
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_MDG_CDS_CHNGREC_STR,
MANDT TYPE STRING,
USMD_MODEL TYPE STRING,
DOCUMENT_ORIGIN TYPE STRING,
CHANGEINDICATOR TYPE STRING,
DOCUMENT_GUID TYPE STRING,
USMD_CREQUEST TYPE STRING,
USMD_ENTITY TYPE STRING,
FIELDNAME TYPE STRING,
BUSINESS_KEY TYPE STRING,
LANGUAGE TYPE STRING,
CHANGENR TYPE STRING,
UNIT_OLD TYPE STRING,
UNIT_NEW TYPE STRING,
CUKY_OLD TYPE STRING,
CUKY_NEW TYPE STRING,
VALUE_OLD TYPE STRING,
VALUE_NEW TYPE STRING,
USER_NAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,END OF T_EKKO_STR. DATA: WA_MDG_CDS_CHNGREC_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_MDG_CDS_CHNGREC_STR-MANDT sy-vline
WA_MDG_CDS_CHNGREC_STR-USMD_MODEL sy-vline
WA_MDG_CDS_CHNGREC_STR-DOCUMENT_ORIGIN sy-vline
WA_MDG_CDS_CHNGREC_STR-CHANGEINDICATOR sy-vline
WA_MDG_CDS_CHNGREC_STR-DOCUMENT_GUID sy-vline
WA_MDG_CDS_CHNGREC_STR-USMD_CREQUEST sy-vline
WA_MDG_CDS_CHNGREC_STR-USMD_ENTITY sy-vline
WA_MDG_CDS_CHNGREC_STR-FIELDNAME sy-vline
WA_MDG_CDS_CHNGREC_STR-BUSINESS_KEY sy-vline
WA_MDG_CDS_CHNGREC_STR-LANGUAGE sy-vline
WA_MDG_CDS_CHNGREC_STR-CHANGENR sy-vline
WA_MDG_CDS_CHNGREC_STR-UNIT_OLD sy-vline
WA_MDG_CDS_CHNGREC_STR-UNIT_NEW sy-vline
WA_MDG_CDS_CHNGREC_STR-CUKY_OLD sy-vline
WA_MDG_CDS_CHNGREC_STR-CUKY_NEW sy-vline
WA_MDG_CDS_CHNGREC_STR-VALUE_OLD sy-vline
WA_MDG_CDS_CHNGREC_STR-VALUE_NEW sy-vline
WA_MDG_CDS_CHNGREC_STR-USER_NAME sy-vline
WA_MDG_CDS_CHNGREC_STR-UDATE sy-vline
WA_MDG_CDS_CHNGREC_STR-UTIME sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.