ABAP Select data from SAP table REGS_REGR_CL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REGS_REGR_CL
*  INTO TABLE @DATA(IT_REGS_REGR_CL2).
*--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_REGS_REGR_CL INDEX 1 INTO DATA(WA_REGS_REGR_CL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REGS_REGR_CL>-UUID = 1.
<REGS_REGR_CL>-ATTRIBUTES = 1.
<REGS_REGR_CL>-N = 1.
<REGS_REGR_CL>-SH1 = 1.
<REGS_REGR_CL>-SL1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REGS_REGR_CL-IH1, sy-vline,
  WA_REGS_REGR_CL-IL1, sy-vline,
  WA_REGS_REGR_CL-ALPHA, sy-vline,
  WA_REGS_REGR_CL-X_LABEL, sy-vline,
  WA_REGS_REGR_CL-Y_LABEL, sy-vline,
  WA_REGS_REGR_CL-X_MEAN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REGS_REGR_CL 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_REGS_REGR_CL 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_REGS_REGR_CL INTO WA_REGS_REGR_CL.


*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_REGS_REGR_CL_STR, 
UUID TYPE STRING,
ATTRIBUTES TYPE STRING,
N TYPE STRING,
SH1 TYPE STRING,
SL1 TYPE STRING,
IH1 TYPE STRING,
IL1 TYPE STRING,
ALPHA TYPE STRING,
X_LABEL TYPE STRING,
Y_LABEL TYPE STRING,
X_MEAN TYPE STRING,
Y_MEAN TYPE STRING,
STD_ERROR TYPE STRING,
VARCBETA2 TYPE STRING,
VARCBETA1 TYPE STRING,
SECBETA2 TYPE STRING,
SECBETA1 TYPE STRING,
CBETA2 TYPE STRING,
CBETA1 TYPE STRING,
R2 TYPE STRING,
RBAR2 TYPE STRING,
SST TYPE STRING,
SSR TYPE STRING,
SSE TYPE STRING,
MSR TYPE STRING,
MSE TYPE STRING,
FSTAT TYPE STRING,
TSTAT_SLOPE TYPE STRING,
TSTAT_INTERCEPT TYPE STRING,
SLOPE_LOWER_INTE TYPE STRING,
INTERCEPT_LOWER_ TYPE STRING,
SLOPE_UPPER_INTE TYPE STRING,
INTERCEPT_UPPER_ TYPE STRING,
FTABLEVALUE TYPE STRING,
TTABLEVALUE TYPE STRING,
ENTERBY TYPE STRING,
ENTERON TYPE STRING,
ENTERTIME TYPE STRING,
ENTERTIMESTAMP TYPE STRING,
ROLLNAME_X TYPE STRING,
ROLLNAME_Y TYPE STRING,
UOM_X TYPE STRING,
UOM_Y TYPE STRING,
DATA_POINT_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REGS_REGR_CL_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_REGS_REGR_CL_STR-UUID sy-vline 
WA_REGS_REGR_CL_STR-ATTRIBUTES sy-vline 
WA_REGS_REGR_CL_STR-N sy-vline 
WA_REGS_REGR_CL_STR-SH1 sy-vline 
WA_REGS_REGR_CL_STR-SL1 sy-vline 
WA_REGS_REGR_CL_STR-IH1 sy-vline 
WA_REGS_REGR_CL_STR-IL1 sy-vline 
WA_REGS_REGR_CL_STR-ALPHA sy-vline 
WA_REGS_REGR_CL_STR-X_LABEL sy-vline 
WA_REGS_REGR_CL_STR-Y_LABEL sy-vline 
WA_REGS_REGR_CL_STR-X_MEAN sy-vline 
WA_REGS_REGR_CL_STR-Y_MEAN sy-vline 
WA_REGS_REGR_CL_STR-STD_ERROR sy-vline 
WA_REGS_REGR_CL_STR-VARCBETA2 sy-vline 
WA_REGS_REGR_CL_STR-VARCBETA1 sy-vline 
WA_REGS_REGR_CL_STR-SECBETA2 sy-vline 
WA_REGS_REGR_CL_STR-SECBETA1 sy-vline 
WA_REGS_REGR_CL_STR-CBETA2 sy-vline 
WA_REGS_REGR_CL_STR-CBETA1 sy-vline 
WA_REGS_REGR_CL_STR-R2 sy-vline 
WA_REGS_REGR_CL_STR-RBAR2 sy-vline 
WA_REGS_REGR_CL_STR-SST sy-vline 
WA_REGS_REGR_CL_STR-SSR sy-vline 
WA_REGS_REGR_CL_STR-SSE sy-vline 
WA_REGS_REGR_CL_STR-MSR sy-vline 
WA_REGS_REGR_CL_STR-MSE sy-vline 
WA_REGS_REGR_CL_STR-FSTAT sy-vline 
WA_REGS_REGR_CL_STR-TSTAT_SLOPE sy-vline 
WA_REGS_REGR_CL_STR-TSTAT_INTERCEPT sy-vline 
WA_REGS_REGR_CL_STR-SLOPE_LOWER_INTE sy-vline 
WA_REGS_REGR_CL_STR-INTERCEPT_LOWER_ sy-vline 
WA_REGS_REGR_CL_STR-SLOPE_UPPER_INTE sy-vline 
WA_REGS_REGR_CL_STR-INTERCEPT_UPPER_ sy-vline 
WA_REGS_REGR_CL_STR-FTABLEVALUE sy-vline 
WA_REGS_REGR_CL_STR-TTABLEVALUE sy-vline 
WA_REGS_REGR_CL_STR-ENTERBY sy-vline 
WA_REGS_REGR_CL_STR-ENTERON sy-vline 
WA_REGS_REGR_CL_STR-ENTERTIME sy-vline 
WA_REGS_REGR_CL_STR-ENTERTIMESTAMP sy-vline 
WA_REGS_REGR_CL_STR-ROLLNAME_X sy-vline 
WA_REGS_REGR_CL_STR-ROLLNAME_Y sy-vline 
WA_REGS_REGR_CL_STR-UOM_X sy-vline 
WA_REGS_REGR_CL_STR-UOM_Y sy-vline 
WA_REGS_REGR_CL_STR-DATA_POINT_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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