ABAP Select data from SAP table FICOS_POS_BUFF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FICOS_POS_BUFF
*  INTO TABLE @DATA(IT_FICOS_POS_BUFF2).
*--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_FICOS_POS_BUFF INDEX 1 INTO DATA(WA_FICOS_POS_BUFF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FICOS_POS_BUFF>-F_BUFFER = 1.
<FICOS_POS_BUFF>-MANDT = 1.
<FICOS_POS_BUFF>-I_LIST = 1.
<FICOS_POS_BUFF>-I_COMP = 1.
<FICOS_POS_BUFF>-I_POSNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FICOS_POS_BUFF-I_VARIABLE, sy-vline,
  WA_FICOS_POS_BUFF-I_EXTLINK, sy-vline,
  WA_FICOS_POS_BUFF-O_STATUS, sy-vline,
  WA_FICOS_POS_BUFF-A_BASE, sy-vline,
  WA_FICOS_POS_BUFF-O_BASEREF, sy-vline,
  WA_FICOS_POS_BUFF-O_BASEFIXING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FICOS_POS_BUFF 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_FICOS_POS_BUFF 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_FICOS_POS_BUFF INTO WA_FICOS_POS_BUFF.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FICOS_POS_BUFF_STR, 
F_BUFFER TYPE STRING,
MANDT TYPE STRING,
I_LIST TYPE STRING,
I_COMP TYPE STRING,
I_POSNO TYPE STRING,
I_VARIABLE TYPE STRING,
I_EXTLINK TYPE STRING,
O_STATUS TYPE STRING,
A_BASE TYPE STRING,
O_BASEREF TYPE STRING,
O_BASEFIXING TYPE STRING,
O_IRUNIT TYPE STRING,
A_AMT TYPE STRING,
A_AMTMIN TYPE STRING,
A_AMTMAX TYPE STRING,
A_AMTTRIV TYPE STRING,
A_AMTLIMAMT TYPE STRING,
N_COUNTLIM TYPE STRING,
N_DIVISOR TYPE STRING,
I_FORMULA TYPE STRING,
A_ADDAMT TYPE STRING,
A_ADDAMTLIM TYPE STRING,
A_AMT_2 TYPE STRING,
N_FX_RATE TYPE STRING,
C_AMT_POST TYPE STRING,
P_PAYMENT TYPE STRING,
O_PERCDAY TYPE STRING,
I_FORMULA_ID TYPE STRING,
O_AMTLIM_REF TYPE STRING,
O_LEVEL_POS TYPE STRING,
O_LEVELTOFR_POS TYPE STRING,
A_AMTLIMAMT2 TYPE STRING,
O_AMTLIM_REF2 TYPE STRING,
O_WAIVETOFROM TYPE STRING,
O_WAIVEPRD TYPE STRING,
N_FREECOUNT_POS TYPE STRING,
A_AMTLIMDATE TYPE STRING,
D_DATE TYPE STRING,
O_KEYDATEPOS TYPE STRING,
N_DAYS TYPE STRING,
N_DAYS_PAY TYPE STRING,
O_DAYTYPE TYPE STRING,
O_DATESHIFT TYPE STRING,
O_DATESHIFT_PAY TYPE STRING,
N_TOLDAYMAX TYPE STRING,
N_TOLDAYMIN TYPE STRING,
O_TIMESET_TYPE TYPE STRING,
T_VALTIME TYPE STRING,
O_TIME_TYPE TYPE STRING,
N_SECONDS TYPE STRING,
R_PERCENTAGE TYPE STRING,
O_INTREF TYPE STRING,
P_FLUCT TYPE STRING,
R_INCREMENT TYPE STRING,
R_INTMAX TYPE STRING,
R_INTMIN TYPE STRING,
R_INTMAXC TYPE STRING,
R_INTMINF TYPE STRING,
R_INTMAXD TYPE STRING,
R_INTMIND TYPE STRING,
I_FLDLSTID TYPE STRING,
X_FORMULA_C TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FICOS_POS_BUFF_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_FICOS_POS_BUFF_STR-F_BUFFER sy-vline 
WA_FICOS_POS_BUFF_STR-MANDT sy-vline 
WA_FICOS_POS_BUFF_STR-I_LIST sy-vline 
WA_FICOS_POS_BUFF_STR-I_COMP sy-vline 
WA_FICOS_POS_BUFF_STR-I_POSNO sy-vline 
WA_FICOS_POS_BUFF_STR-I_VARIABLE sy-vline 
WA_FICOS_POS_BUFF_STR-I_EXTLINK sy-vline 
WA_FICOS_POS_BUFF_STR-O_STATUS sy-vline 
WA_FICOS_POS_BUFF_STR-A_BASE sy-vline 
WA_FICOS_POS_BUFF_STR-O_BASEREF sy-vline 
WA_FICOS_POS_BUFF_STR-O_BASEFIXING sy-vline 
WA_FICOS_POS_BUFF_STR-O_IRUNIT sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMT sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMTMIN sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMTMAX sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMTTRIV sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMTLIMAMT sy-vline 
WA_FICOS_POS_BUFF_STR-N_COUNTLIM sy-vline 
WA_FICOS_POS_BUFF_STR-N_DIVISOR sy-vline 
WA_FICOS_POS_BUFF_STR-I_FORMULA sy-vline 
WA_FICOS_POS_BUFF_STR-A_ADDAMT sy-vline 
WA_FICOS_POS_BUFF_STR-A_ADDAMTLIM sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMT_2 sy-vline 
WA_FICOS_POS_BUFF_STR-N_FX_RATE sy-vline 
WA_FICOS_POS_BUFF_STR-C_AMT_POST sy-vline 
WA_FICOS_POS_BUFF_STR-P_PAYMENT sy-vline 
WA_FICOS_POS_BUFF_STR-O_PERCDAY sy-vline 
WA_FICOS_POS_BUFF_STR-I_FORMULA_ID sy-vline 
WA_FICOS_POS_BUFF_STR-O_AMTLIM_REF sy-vline 
WA_FICOS_POS_BUFF_STR-O_LEVEL_POS sy-vline 
WA_FICOS_POS_BUFF_STR-O_LEVELTOFR_POS sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMTLIMAMT2 sy-vline 
WA_FICOS_POS_BUFF_STR-O_AMTLIM_REF2 sy-vline 
WA_FICOS_POS_BUFF_STR-O_WAIVETOFROM sy-vline 
WA_FICOS_POS_BUFF_STR-O_WAIVEPRD sy-vline 
WA_FICOS_POS_BUFF_STR-N_FREECOUNT_POS sy-vline 
WA_FICOS_POS_BUFF_STR-A_AMTLIMDATE sy-vline 
WA_FICOS_POS_BUFF_STR-D_DATE sy-vline 
WA_FICOS_POS_BUFF_STR-O_KEYDATEPOS sy-vline 
WA_FICOS_POS_BUFF_STR-N_DAYS sy-vline 
WA_FICOS_POS_BUFF_STR-N_DAYS_PAY sy-vline 
WA_FICOS_POS_BUFF_STR-O_DAYTYPE sy-vline 
WA_FICOS_POS_BUFF_STR-O_DATESHIFT sy-vline 
WA_FICOS_POS_BUFF_STR-O_DATESHIFT_PAY sy-vline 
WA_FICOS_POS_BUFF_STR-N_TOLDAYMAX sy-vline 
WA_FICOS_POS_BUFF_STR-N_TOLDAYMIN sy-vline 
WA_FICOS_POS_BUFF_STR-O_TIMESET_TYPE sy-vline 
WA_FICOS_POS_BUFF_STR-T_VALTIME sy-vline 
WA_FICOS_POS_BUFF_STR-O_TIME_TYPE sy-vline 
WA_FICOS_POS_BUFF_STR-N_SECONDS sy-vline 
WA_FICOS_POS_BUFF_STR-R_PERCENTAGE sy-vline 
WA_FICOS_POS_BUFF_STR-O_INTREF sy-vline 
WA_FICOS_POS_BUFF_STR-P_FLUCT sy-vline 
WA_FICOS_POS_BUFF_STR-R_INCREMENT sy-vline 
WA_FICOS_POS_BUFF_STR-R_INTMAX sy-vline 
WA_FICOS_POS_BUFF_STR-R_INTMIN sy-vline 
WA_FICOS_POS_BUFF_STR-R_INTMAXC sy-vline 
WA_FICOS_POS_BUFF_STR-R_INTMINF sy-vline 
WA_FICOS_POS_BUFF_STR-R_INTMAXD sy-vline 
WA_FICOS_POS_BUFF_STR-R_INTMIND sy-vline 
WA_FICOS_POS_BUFF_STR-I_FLDLSTID sy-vline 
WA_FICOS_POS_BUFF_STR-X_FORMULA_C sy-vline      INTO ld_text SEPARATED BY SPACE.

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