ABAP Select data from SAP table GRPC_S_RULE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRPC_S_RULE
*  INTO TABLE @DATA(IT_GRPC_S_RULE2).
*--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_GRPC_S_RULE INDEX 1 INTO DATA(WA_GRPC_S_RULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRPC_S_RULE>-RULEID = 1.
<GRPC_S_RULE>-RULEDESC = 1.
<GRPC_S_RULE>-SCRIPT = 1.
<GRPC_S_RULE>-SCRIPTDESC = 1.
<GRPC_S_RULE>-SCRIPTCATG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRPC_S_RULE-SCRIPTTYPE, sy-vline,
  WA_GRPC_S_RULE-SYSTEMTYPE, sy-vline,
  WA_GRPC_S_RULE-CONNECTOR, sy-vline,
  WA_GRPC_S_RULE-RULESTATUS, sy-vline,
  WA_GRPC_S_RULE-RULEGROUP, sy-vline,
  WA_GRPC_S_RULE-VALIDFROM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRPC_S_RULE 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_GRPC_S_RULE 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_GRPC_S_RULE INTO WA_GRPC_S_RULE.


*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_GRPC_S_RULE_STR, 
RULEID TYPE STRING,
RULEDESC TYPE STRING,
SCRIPT TYPE STRING,
SCRIPTDESC TYPE STRING,
SCRIPTCATG TYPE STRING,
SCRIPTTYPE TYPE STRING,
SYSTEMTYPE TYPE STRING,
CONNECTOR TYPE STRING,
RULESTATUS TYPE STRING,
RULEGROUP TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
RISKVALUERELEVAN TYPE STRING,
VERSION TYPE STRING,
RESPONSEMODE TYPE STRING,
RULESTEPID TYPE STRING,
RULEIDDESCSEARCH TYPE STRING,
PROGRAM_NAME TYPE STRING,
RULEGROUPDESC TYPE STRING,
ORIGINAL_RULEID TYPE STRING,
COPYFROM_RULEID TYPE STRING,
MAXREC TYPE STRING,
CREATEDON TYPE STRING,
CREATETIME TYPE STRING,
CREATEDBY TYPE STRING,
CHANGEDON TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRPC_S_RULE_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_GRPC_S_RULE_STR-RULEID sy-vline 
WA_GRPC_S_RULE_STR-RULEDESC sy-vline 
WA_GRPC_S_RULE_STR-SCRIPT sy-vline 
WA_GRPC_S_RULE_STR-SCRIPTDESC sy-vline 
WA_GRPC_S_RULE_STR-SCRIPTCATG sy-vline 
WA_GRPC_S_RULE_STR-SCRIPTTYPE sy-vline 
WA_GRPC_S_RULE_STR-SYSTEMTYPE sy-vline 
WA_GRPC_S_RULE_STR-CONNECTOR sy-vline 
WA_GRPC_S_RULE_STR-RULESTATUS sy-vline 
WA_GRPC_S_RULE_STR-RULEGROUP sy-vline 
WA_GRPC_S_RULE_STR-VALIDFROM sy-vline 
WA_GRPC_S_RULE_STR-VALIDTO sy-vline 
WA_GRPC_S_RULE_STR-RISKVALUERELEVAN sy-vline 
WA_GRPC_S_RULE_STR-VERSION sy-vline 
WA_GRPC_S_RULE_STR-RESPONSEMODE sy-vline 
WA_GRPC_S_RULE_STR-RULESTEPID sy-vline 
WA_GRPC_S_RULE_STR-RULEIDDESCSEARCH sy-vline 
WA_GRPC_S_RULE_STR-PROGRAM_NAME sy-vline 
WA_GRPC_S_RULE_STR-RULEGROUPDESC sy-vline 
WA_GRPC_S_RULE_STR-ORIGINAL_RULEID sy-vline 
WA_GRPC_S_RULE_STR-COPYFROM_RULEID sy-vline 
WA_GRPC_S_RULE_STR-MAXREC sy-vline 
WA_GRPC_S_RULE_STR-CREATEDON sy-vline 
WA_GRPC_S_RULE_STR-CREATETIME sy-vline 
WA_GRPC_S_RULE_STR-CREATEDBY sy-vline 
WA_GRPC_S_RULE_STR-CHANGEDON sy-vline 
WA_GRPC_S_RULE_STR-CHANGETIME sy-vline 
WA_GRPC_S_RULE_STR-CHANGEDBY sy-vline      INTO ld_text SEPARATED BY SPACE.

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