ABAP Select data from SAP table CPET_PSM_DATA_INSTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPET_PSM_DATA_INSTR
*  INTO TABLE @DATA(IT_CPET_PSM_DATA_INSTR2).
*--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_CPET_PSM_DATA_INSTR INDEX 1 INTO DATA(WA_CPET_PSM_DATA_INSTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPET_PSM_DATA_INSTR>-EXPRTNINSTRUCTION = 1.
<CPET_PSM_DATA_INSTR>-PRCGEXECINSTRN = 1.
<CPET_PSM_DATA_INSTR>-LMTPRC = 1.
<CPET_PSM_DATA_INSTR>-LMTPRCCURRENCY = 1.
<CPET_PSM_DATA_INSTR>-STOPPRICE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPET_PSM_DATA_INSTR-STOPPRICECRCY, sy-vline,
  WA_CPET_PSM_DATA_INSTR-STOPLMTPRC, sy-vline,
  WA_CPET_PSM_DATA_INSTR-STOPLMTPRCCURRENCY, sy-vline,
  WA_CPET_PSM_DATA_INSTR-FXDPRC, sy-vline,
  WA_CPET_PSM_DATA_INSTR-FXDPRCCRCY, sy-vline,
  WA_CPET_PSM_DATA_INSTR-LEEWAYPRC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPET_PSM_DATA_INSTR 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_CPET_PSM_DATA_INSTR 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_CPET_PSM_DATA_INSTR INTO WA_CPET_PSM_DATA_INSTR.


*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_CPET_PSM_DATA_INSTR_STR, 
EXPRTNINSTRUCTION TYPE STRING,
PRCGEXECINSTRN TYPE STRING,
LMTPRC TYPE STRING,
LMTPRCCURRENCY TYPE STRING,
STOPPRICE TYPE STRING,
STOPPRICECRCY TYPE STRING,
STOPLMTPRC TYPE STRING,
STOPLMTPRCCURRENCY TYPE STRING,
FXDPRC TYPE STRING,
FXDPRCCRCY TYPE STRING,
LEEWAYPRC TYPE STRING,
LEEWAYPRCCRCY TYPE STRING,
LEEWAYRNGEPRC TYPE STRING,
LEEWAYRNGEPRCCRCY TYPE STRING,
EXPIRATIONDATE TYPE STRING,
LMTSPREADPRC TYPE STRING,
LMTSPREADPRCCRCY TYPE STRING,
FXDSPREADPRC TYPE STRING,
FXDSPREADPRCCRCY TYPE STRING,
TICKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPET_PSM_DATA_INSTR_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_CPET_PSM_DATA_INSTR_STR-EXPRTNINSTRUCTION sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-PRCGEXECINSTRN sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LMTPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LMTPRCCURRENCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-STOPPRICE sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-STOPPRICECRCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-STOPLMTPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-STOPLMTPRCCURRENCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-FXDPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-FXDPRCCRCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LEEWAYPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LEEWAYPRCCRCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LEEWAYRNGEPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LEEWAYRNGEPRCCRCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-EXPIRATIONDATE sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LMTSPREADPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-LMTSPREADPRCCRCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-FXDSPREADPRC sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-FXDSPREADPRCCRCY sy-vline 
WA_CPET_PSM_DATA_INSTR_STR-TICKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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