ABAP Select data from SAP table EMMAC_CCAT_HDR into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EMMAC_CCAT_HDR
*  INTO TABLE @DATA(IT_EMMAC_CCAT_HDR2).
*--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_EMMAC_CCAT_HDR INDEX 1 INTO DATA(WA_EMMAC_CCAT_HDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EMMAC_CCAT_HDR>-CLIENT = 1.
<EMMAC_CCAT_HDR>-CCAT = 1.
<EMMAC_CCAT_HDR>-XDEACT = 1.
<EMMAC_CCAT_HDR>-CTYPE = 1.
<EMMAC_CCAT_HDR>-XIDENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EMMAC_CCAT_HDR-XMSG, sy-vline,
  WA_EMMAC_CCAT_HDR-XDUP, sy-vline,
  WA_EMMAC_CCAT_HDR-XOBJ, sy-vline,
  WA_EMMAC_CCAT_HDR-CDTYPE, sy-vline,
  WA_EMMAC_CCAT_HDR-PRIO, sy-vline,
  WA_EMMAC_CCAT_HDR-CELEMNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EMMAC_CCAT_HDR 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_EMMAC_CCAT_HDR 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_EMMAC_CCAT_HDR INTO WA_EMMAC_CCAT_HDR.


*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 BPCODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMMAC_CCAT_HDR-BPCODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMMAC_CCAT_HDR-BPCODE.
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_EMMAC_CCAT_HDR_STR, 
CLIENT TYPE STRING,
CCAT TYPE STRING,
XDEACT TYPE STRING,
CTYPE TYPE STRING,
XIDENT TYPE STRING,
XMSG TYPE STRING,
XDUP TYPE STRING,
XOBJ TYPE STRING,
CDTYPE TYPE STRING,
PRIO TYPE STRING,
CELEMNAME TYPE STRING,
CLDRULE TYPE STRING,
TIMTYP TYPE STRING,
TIMQTY TYPE STRING,
XDDCAL TYPE STRING,
XPROCA TYPE STRING,
BRGRU TYPE STRING,
FWM TYPE STRING,
BPCODE TYPE STRING,
CREATED_DATE TYPE STRING,
CREATED_TIME TYPE STRING,
CREATED_BY TYPE STRING,
CHANGED_DATE TYPE STRING,
CHANGED_TIME TYPE STRING,
CHANGED_BY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EMMAC_CCAT_HDR_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_EMMAC_CCAT_HDR_STR-CLIENT sy-vline 
WA_EMMAC_CCAT_HDR_STR-CCAT sy-vline 
WA_EMMAC_CCAT_HDR_STR-XDEACT sy-vline 
WA_EMMAC_CCAT_HDR_STR-CTYPE sy-vline 
WA_EMMAC_CCAT_HDR_STR-XIDENT sy-vline 
WA_EMMAC_CCAT_HDR_STR-XMSG sy-vline 
WA_EMMAC_CCAT_HDR_STR-XDUP sy-vline 
WA_EMMAC_CCAT_HDR_STR-XOBJ sy-vline 
WA_EMMAC_CCAT_HDR_STR-CDTYPE sy-vline 
WA_EMMAC_CCAT_HDR_STR-PRIO sy-vline 
WA_EMMAC_CCAT_HDR_STR-CELEMNAME sy-vline 
WA_EMMAC_CCAT_HDR_STR-CLDRULE sy-vline 
WA_EMMAC_CCAT_HDR_STR-TIMTYP sy-vline 
WA_EMMAC_CCAT_HDR_STR-TIMQTY sy-vline 
WA_EMMAC_CCAT_HDR_STR-XDDCAL sy-vline 
WA_EMMAC_CCAT_HDR_STR-XPROCA sy-vline 
WA_EMMAC_CCAT_HDR_STR-BRGRU sy-vline 
WA_EMMAC_CCAT_HDR_STR-FWM sy-vline 
WA_EMMAC_CCAT_HDR_STR-BPCODE sy-vline 
WA_EMMAC_CCAT_HDR_STR-CREATED_DATE sy-vline 
WA_EMMAC_CCAT_HDR_STR-CREATED_TIME sy-vline 
WA_EMMAC_CCAT_HDR_STR-CREATED_BY sy-vline 
WA_EMMAC_CCAT_HDR_STR-CHANGED_DATE sy-vline 
WA_EMMAC_CCAT_HDR_STR-CHANGED_TIME sy-vline 
WA_EMMAC_CCAT_HDR_STR-CHANGED_BY sy-vline      INTO ld_text SEPARATED BY SPACE.

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