ABAP Select data from SAP table CNV_PE_S_IF_PARAM_CREATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_PE_S_IF_PARAM_CREATION
*  INTO TABLE @DATA(IT_CNV_PE_S_IF_PARAM_CREATION2).
*--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_CNV_PE_S_IF_PARAM_CREATION INDEX 1 INTO DATA(WA_CNV_PE_S_IF_PARAM_CREATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_PE_S_IF_PARAM_CREATION>-PAR_ID = 1.
<CNV_PE_S_IF_PARAM_CREATION>-PAR_NAME = 1.
<CNV_PE_S_IF_PARAM_CREATION>-PAR_NR = 1.
<CNV_PE_S_IF_PARAM_CREATION>-PARENT_ID = 1.
<CNV_PE_S_IF_PARAM_CREATION>-PARENT_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_PE_S_IF_PARAM_CREATION-DESCRIPTION, sy-vline,
  WA_CNV_PE_S_IF_PARAM_CREATION-IS_FOLDER, sy-vline,
  WA_CNV_PE_S_IF_PARAM_CREATION-OPTIONAL, sy-vline,
  WA_CNV_PE_S_IF_PARAM_CREATION-OPTIONAL_CHG_VAL, sy-vline,
  WA_CNV_PE_S_IF_PARAM_CREATION-KIND, sy-vline,
  WA_CNV_PE_S_IF_PARAM_CREATION-TYPE_DESCR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_PE_S_IF_PARAM_CREATION 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_CNV_PE_S_IF_PARAM_CREATION 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_CNV_PE_S_IF_PARAM_CREATION INTO WA_CNV_PE_S_IF_PARAM_CREATION.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_CNV_PE_S_IF_PARAM_CREATION-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_PE_S_IF_PARAM_CREATION-DATATYPE.
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_CNV_PE_S_IF_PARAM_CREATION_STR, 
PAR_ID TYPE STRING,
PAR_NAME TYPE STRING,
PAR_NR TYPE STRING,
PARENT_ID TYPE STRING,
PARENT_NAME TYPE STRING,
DESCRIPTION TYPE STRING,
IS_FOLDER TYPE STRING,
OPTIONAL TYPE STRING,
OPTIONAL_CHG_VAL TYPE STRING,
KIND TYPE STRING,
TYPE_DESCR TYPE STRING,
TYPE_KIND TYPE STRING,
TYPE TYPE STRING,
TYPE_NAME TYPE STRING,
DISPLAYED TYPE STRING,
NO_DISPLAY_TCFG TYPE STRING,
DELETED TYPE STRING,
IS_KEY TYPE STRING,
CUSTOMER TYPE STRING,
FREELY_DEFINED TYPE STRING,
PARTYPE_ID TYPE STRING,
CAN_MAINTAIN_TABLE_RELATION TYPE STRING,
INTTYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
DATATYPE TYPE STRING,
INTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
LOWERCASE TYPE STRING,
CONVEXIT TYPE STRING,
REFFIELD TYPE STRING,
REFTABLE TYPE STRING,
REF_PAR_ID TYPE STRING,
SHKZG_REFFIELD TYPE STRING,
SHKZG_REFTABLE TYPE STRING,
SHKZG_REF_PAR_ID TYPE STRING,
INTTEXT TYPE STRING,
IS_KEY_INTERNAL TYPE STRING,
NODE_IMAGE TYPE STRING,
RELA_IMAGE TYPE STRING,
DISABLED TYPE STRING,
INACTIVE TYPE STRING,
INACTIVE_CHG_VAL TYPE STRING,
TECHNICAL TYPE STRING,
TECHNICAL_CHG_VAL TYPE STRING,
USE_SHKZG TYPE STRING,
WAERS_LOGIC TYPE STRING,
WAERS_TECH_FIELD TYPE STRING,
LOCKED TYPE STRING,
LOCKED_CHG_VAL TYPE STRING,
EXTENSION TYPE STRING,
EXTENSION_CHG_VAL TYPE STRING,
RETEVAL TYPE STRING,
OBJ_ALIAS TYPE STRING,
QUANTITY_LOGIC TYPE STRING,
QUANTITY_TECHFLD TYPE STRING,
ACCESSMODE TYPE STRING,
KEYDEF TYPE STRING,
KEYKIND TYPE STRING,
KEYFDPOS TYPE STRING,
RFCDEST TYPE STRING,
CREATE_CHILDREN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_PE_S_IF_PARAM_CREATION_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_CNV_PE_S_IF_PARAM_CREATION_STR-PAR_ID sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-PAR_NAME sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-PAR_NR sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-PARENT_ID sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-PARENT_NAME sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DESCRIPTION sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-IS_FOLDER sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-OPTIONAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-OPTIONAL_CHG_VAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-KIND sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-TYPE_DESCR sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-TYPE_KIND sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-TYPE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-TYPE_NAME sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DISPLAYED sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-NO_DISPLAY_TCFG sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DELETED sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-IS_KEY sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-CUSTOMER sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-FREELY_DEFINED sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-PARTYPE_ID sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-CAN_MAINTAIN_TABLE_RELATION sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-INTTYPE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-LENG sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DECIMALS sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DATATYPE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-INTLEN sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-OUTPUTLEN sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-ROLLNAME sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DOMNAME sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-LOWERCASE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-CONVEXIT sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-REFFIELD sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-REFTABLE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-REF_PAR_ID sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-SHKZG_REFFIELD sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-SHKZG_REFTABLE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-SHKZG_REF_PAR_ID sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-INTTEXT sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-IS_KEY_INTERNAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-NODE_IMAGE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-RELA_IMAGE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-DISABLED sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-INACTIVE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-INACTIVE_CHG_VAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-TECHNICAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-TECHNICAL_CHG_VAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-USE_SHKZG sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-WAERS_LOGIC sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-WAERS_TECH_FIELD sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-LOCKED sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-LOCKED_CHG_VAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-EXTENSION sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-EXTENSION_CHG_VAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-RETEVAL sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-OBJ_ALIAS sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-QUANTITY_LOGIC sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-QUANTITY_TECHFLD sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-ACCESSMODE sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-KEYDEF sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-KEYKIND sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-KEYFDPOS sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-RFCDEST sy-vline 
WA_CNV_PE_S_IF_PARAM_CREATION_STR-CREATE_CHILDREN sy-vline      INTO ld_text SEPARATED BY SPACE.

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