ABAP Select data from SAP table GLE_MCA_STR_PROC_PARAMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLE_MCA_STR_PROC_PARAMS
*  INTO TABLE @DATA(IT_GLE_MCA_STR_PROC_PARAMS2).
*--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_GLE_MCA_STR_PROC_PARAMS INDEX 1 INTO DATA(WA_GLE_MCA_STR_PROC_PARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLE_MCA_STR_PROC_PARAMS>-PRCCAT = 1.
<GLE_MCA_STR_PROC_PARAMS>-BALANCE_BASED = 1.
<GLE_MCA_STR_PROC_PARAMS>-NPDATE = 1.
<GLE_MCA_STR_PROC_PARAMS>-LDG_ENVIRONMENT = 1.
<GLE_MCA_STR_PROC_PARAMS>-LDG_DAILY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLE_MCA_STR_PROC_PARAMS-LDG_PERIOD_LOW, sy-vline,
  WA_GLE_MCA_STR_PROC_PARAMS-LDG_PERIOD_HIGH, sy-vline,
  WA_GLE_MCA_STR_PROC_PARAMS-LDG_FYEAR, sy-vline,
  WA_GLE_MCA_STR_PROC_PARAMS-REF_DAT_LOW, sy-vline,
  WA_GLE_MCA_STR_PROC_PARAMS-REF_DAT_HIGH, sy-vline,
  WA_GLE_MCA_STR_PROC_PARAMS-DOCDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLE_MCA_STR_PROC_PARAMS 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_GLE_MCA_STR_PROC_PARAMS 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_GLE_MCA_STR_PROC_PARAMS INTO WA_GLE_MCA_STR_PROC_PARAMS.


*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 GJAHR, internal->external for field LDG_FYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_STR_PROC_PARAMS-LDG_FYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_PROC_PARAMS-LDG_FYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GLE_MCA_STR_PROC_PARAMS-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLE_MCA_STR_PROC_PARAMS-RLDNR.
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_GLE_MCA_STR_PROC_PARAMS_STR, 
PRCCAT TYPE STRING,
BALANCE_BASED TYPE STRING,
NPDATE TYPE STRING,
LDG_ENVIRONMENT TYPE STRING,
LDG_DAILY TYPE STRING,
LDG_PERIOD_LOW TYPE STRING,
LDG_PERIOD_HIGH TYPE STRING,
LDG_FYEAR TYPE STRING,
REF_DAT_LOW TYPE STRING,
REF_DAT_HIGH TYPE STRING,
DOCDATE TYPE STRING,
POSTING_PERIOD TYPE STRING,
BKTXT TYPE STRING,
SGTXT TYPE STRING,
TCODE TYPE STRING,
FLG_INCLUDE_FC TYPE STRING,
RLDNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLE_MCA_STR_PROC_PARAMS_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_GLE_MCA_STR_PROC_PARAMS_STR-PRCCAT sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-BALANCE_BASED sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-NPDATE sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-LDG_ENVIRONMENT sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-LDG_DAILY sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-LDG_PERIOD_LOW sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-LDG_PERIOD_HIGH sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-LDG_FYEAR sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-REF_DAT_LOW sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-REF_DAT_HIGH sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-DOCDATE sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-POSTING_PERIOD sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-BKTXT sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-SGTXT sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-TCODE sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-FLG_INCLUDE_FC sy-vline 
WA_GLE_MCA_STR_PROC_PARAMS_STR-RLDNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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