ABAP Select data from SAP table ACE_PS_RFC_COMMUNICATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACE_PS_RFC_COMMUNICATION
*  INTO TABLE @DATA(IT_ACE_PS_RFC_COMMUNICATION2).
*--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_ACE_PS_RFC_COMMUNICATION INDEX 1 INTO DATA(WA_ACE_PS_RFC_COMMUNICATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACE_PS_RFC_COMMUNICATION>-SEL_OPT = 1.
<ACE_PS_RFC_COMMUNICATION>-SO_ACRTYPE = 1.
<ACE_PS_RFC_COMMUNICATION>-DATA_FOR_RFC = 1.
<ACE_PS_RFC_COMMUNICATION>-APPL_LOG_HEADER = 1.
<ACE_PS_RFC_COMMUNICATION>-EXTNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACE_PS_RFC_COMMUNICATION-OBJECT, sy-vline,
  WA_ACE_PS_RFC_COMMUNICATION-SUBOBJECT, sy-vline,
  WA_ACE_PS_RFC_COMMUNICATION-ALDATE, sy-vline,
  WA_ACE_PS_RFC_COMMUNICATION-ALTIME, sy-vline,
  WA_ACE_PS_RFC_COMMUNICATION-ALUSER, sy-vline,
  WA_ACE_PS_RFC_COMMUNICATION-ALTCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACE_PS_RFC_COMMUNICATION 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_ACE_PS_RFC_COMMUNICATION 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_ACE_PS_RFC_COMMUNICATION INTO WA_ACE_PS_RFC_COMMUNICATION.


*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 RUNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACE_PS_RFC_COMMUNICATION-RUNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACE_PS_RFC_COMMUNICATION-RUNID.
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_ACE_PS_RFC_COMMUNICATION_STR, 
SEL_OPT TYPE STRING,
SO_ACRTYPE TYPE STRING,
DATA_FOR_RFC TYPE STRING,
APPL_LOG_HEADER TYPE STRING,
EXTNUMBER TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
ALDATE TYPE STRING,
ALTIME TYPE STRING,
ALUSER TYPE STRING,
ALTCODE TYPE STRING,
ALPROG TYPE STRING,
ALMODE TYPE STRING,
ALCHDATE TYPE STRING,
ALCHTIME TYPE STRING,
ALCHUSER TYPE STRING,
ALDATE_DEL TYPE STRING,
DEL_BEFORE TYPE STRING,
ALSTATE TYPE STRING,
CONTEXT TYPE STRING,
TABNAME TYPE STRING,
VALUE TYPE STRING,
PARAMS TYPE STRING,
T_PAR TYPE STRING,
CALLBACK TYPE STRING,
USEREXITP TYPE STRING,
USEREXITF TYPE STRING,
USEREXITT TYPE STRING,
ALTEXT TYPE STRING,
ACEDOCNR TYPE STRING,
RUNID TYPE STRING,
TESTRUN TYPE STRING,
SINGLE_LUW TYPE STRING,
FILL_RESULT_TABLES TYPE STRING,
RESULT_TABS TYPE STRING,
AMOUNTS TYPE STRING,
DOCITEMS TYPE STRING,
RETURN TYPE STRING,
ACEDOC_RETURN TYPE STRING,
ACCDOC_RETURN TYPE STRING,
COMP_SIMUPARAM_RANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACE_PS_RFC_COMMUNICATION_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_ACE_PS_RFC_COMMUNICATION_STR-SEL_OPT sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-SO_ACRTYPE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-DATA_FOR_RFC sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-APPL_LOG_HEADER sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-EXTNUMBER sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-OBJECT sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-SUBOBJECT sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALDATE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALTIME sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALUSER sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALTCODE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALPROG sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALMODE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALCHDATE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALCHTIME sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALCHUSER sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALDATE_DEL sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-DEL_BEFORE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALSTATE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-CONTEXT sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-TABNAME sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-VALUE sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-PARAMS sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-T_PAR sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-CALLBACK sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-USEREXITP sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-USEREXITF sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-USEREXITT sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ALTEXT sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ACEDOCNR sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-RUNID sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-TESTRUN sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-SINGLE_LUW sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-FILL_RESULT_TABLES sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-RESULT_TABS sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-AMOUNTS sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-DOCITEMS sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-RETURN sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ACEDOC_RETURN sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-ACCDOC_RETURN sy-vline 
WA_ACE_PS_RFC_COMMUNICATION_STR-COMP_SIMUPARAM_RANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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