ABAP Select data from SAP table P29MSIM_CDAT_ALV_01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P29MSIM_CDAT_ALV_01 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 P29MSIM_CDAT_ALV_01. 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 P29MSIM_CDAT_ALV_01 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_P29MSIM_CDAT_ALV_01 TYPE STANDARD TABLE OF P29MSIM_CDAT_ALV_01,
      WA_P29MSIM_CDAT_ALV_01 TYPE P29MSIM_CDAT_ALV_01,
      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: <P29MSIM_CDAT_ALV_01> TYPE P29MSIM_CDAT_ALV_01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P29MSIM_CDAT_ALV_01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P29MSIM_CDAT_ALV_01
  INTO TABLE IT_P29MSIM_CDAT_ALV_01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P29MSIM_CDAT_ALV_01
*  INTO TABLE @DATA(IT_P29MSIM_CDAT_ALV_012).
*--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_P29MSIM_CDAT_ALV_01 INDEX 1 INTO DATA(WA_P29MSIM_CDAT_ALV_012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P29MSIM_CDAT_ALV_01 ASSIGNING <P29MSIM_CDAT_ALV_01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P29MSIM_CDAT_ALV_01>-SEQNR = 1.
<P29MSIM_CDAT_ALV_01>-PERNR = 1.
<P29MSIM_CDAT_ALV_01>-TIPRG = 1.
<P29MSIM_CDAT_ALV_01>-CODMV = 1.
<P29MSIM_CDAT_ALV_01>-CCUIL = 1.

ENDLOOP.

LOOP AT IT_P29MSIM_CDAT_ALV_01 INTO WA_P29MSIM_CDAT_ALV_01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P29MSIM_CDAT_ALV_01-FENAC, sy-vline,
  WA_P29MSIM_CDAT_ALV_01-NFORM, sy-vline,
  WA_P29MSIM_CDAT_ALV_01-MDISC, sy-vline,
  WA_P29MSIM_CDAT_ALV_01-CPAIS, sy-vline,
  WA_P29MSIM_CDAT_ALV_01-CAREA, sy-vline,
  WA_P29MSIM_CDAT_ALV_01-TELFN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P29MSIM_CDAT_ALV_01 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_P29MSIM_CDAT_ALV_01 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_P29MSIM_CDAT_ALV_01 INTO WA_P29MSIM_CDAT_ALV_01.


*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 NFORM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-NFORM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-NFORM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CPAIS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-CPAIS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-CPAIS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CAREA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-CAREA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-CAREA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TELFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-TELFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-TELFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TTELF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-TTELF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-TTELF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TEMIL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-TEMIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-TEMIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CODBU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-CODBU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-CODBU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NUMPU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-NUMPU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-NUMPU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOCAD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P29MSIM_CDAT_ALV_01-LOCAD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P29MSIM_CDAT_ALV_01-LOCAD.
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_P29MSIM_CDAT_ALV_01_STR, 
SEQNR TYPE STRING,
PERNR TYPE STRING,
TIPRG TYPE STRING,
CODMV TYPE STRING,
CCUIL TYPE STRING,
FENAC TYPE STRING,
NFORM TYPE STRING,
MDISC TYPE STRING,
CPAIS TYPE STRING,
CAREA TYPE STRING,
TELFN TYPE STRING,
TTELF TYPE STRING,
EMAIL TYPE STRING,
TEMIL TYPE STRING,
CODBU TYPE STRING,
CALLE TYPE STRING,
NUMPU TYPE STRING,
TORRE TYPE STRING,
BLOQE TYPE STRING,
PISOB TYPE STRING,
DEPTM TYPE STRING,
CPOST TYPE STRING,
LOCAD TYPE STRING,
PROVN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P29MSIM_CDAT_ALV_01_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_P29MSIM_CDAT_ALV_01_STR-SEQNR sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-PERNR sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-TIPRG sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CODMV sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CCUIL sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-FENAC sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-NFORM sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-MDISC sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CPAIS sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CAREA sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-TELFN sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-TTELF sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-EMAIL sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-TEMIL sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CODBU sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CALLE sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-NUMPU sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-TORRE sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-BLOQE sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-PISOB sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-DEPTM sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-CPOST sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-LOCAD sy-vline 
WA_P29MSIM_CDAT_ALV_01_STR-PROVN sy-vline      INTO ld_text SEPARATED BY SPACE.

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