ABAP Select data from SAP table PIQ_ST_ADVISOR_MAINT_PARAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_ST_ADVISOR_MAINT_PARAM
*  INTO TABLE @DATA(IT_PIQ_ST_ADVISOR_MAINT_PARAM2).
*--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_PIQ_ST_ADVISOR_MAINT_PARAM INDEX 1 INTO DATA(WA_PIQ_ST_ADVISOR_MAINT_PARAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_ST_ADVISOR_MAINT_PARAM>-SELM_GROUP = 1.
<PIQ_ST_ADVISOR_MAINT_PARAM>-SEL_ASSIGN = 1.
<PIQ_ST_ADVISOR_MAINT_PARAM>-SEL_MAINT = 1.
<PIQ_ST_ADVISOR_MAINT_PARAM>-SEL_DISPLAY = 1.
<PIQ_ST_ADVISOR_MAINT_PARAM>-SEL_DELIMIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_ST_ADVISOR_MAINT_PARAM-SEL_DELETE, sy-vline,
  WA_PIQ_ST_ADVISOR_MAINT_PARAM-BP_ID_SEL, sy-vline,
  WA_PIQ_ST_ADVISOR_MAINT_PARAM-BP_ID, sy-vline,
  WA_PIQ_ST_ADVISOR_MAINT_PARAM-SEL_MAIN, sy-vline,
  WA_PIQ_ST_ADVISOR_MAINT_PARAM-SEL_ADV, sy-vline,
  WA_PIQ_ST_ADVISOR_MAINT_PARAM-ADVISOR_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_ST_ADVISOR_MAINT_PARAM 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_PIQ_ST_ADVISOR_MAINT_PARAM 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_PIQ_ST_ADVISOR_MAINT_PARAM INTO WA_PIQ_ST_ADVISOR_MAINT_PARAM.


*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 ALPHA, internal->external for field BP_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_ST_ADVISOR_MAINT_PARAM-BP_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_ST_ADVISOR_MAINT_PARAM-BP_ID.
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_PIQ_ST_ADVISOR_MAINT_PARAM_STR, 
SELM_GROUP TYPE STRING,
SEL_ASSIGN TYPE STRING,
SEL_MAINT TYPE STRING,
SEL_DISPLAY TYPE STRING,
SEL_DELIMIT TYPE STRING,
SEL_DELETE TYPE STRING,
BP_ID_SEL TYPE STRING,
BP_ID TYPE STRING,
SEL_MAIN TYPE STRING,
SEL_ADV TYPE STRING,
ADVISOR_TYPE TYPE STRING,
ADVISORID TYPE STRING,
SEL_PAR TYPE STRING,
FUNCTION TYPE STRING,
FUNCTION_NAME TYPE STRING,
CONTEXT_TYPE_NAME TYPE STRING,
CONTEXT_OTYPE TYPE STRING,
CONTEXT_OBJECT TYPE STRING,
CONTEXT_TYPE TYPE STRING,
CONTEXT_KEY TYPE STRING,
CONTEXT_KEY_NAME TYPE STRING,
MAIN_FUNCTION TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SEL_DATE TYPE STRING,
DELIMDA TYPE STRING,
TESTRUN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_ST_ADVISOR_MAINT_PARAM_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_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SELM_GROUP sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_ASSIGN sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_MAINT sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_DISPLAY sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_DELIMIT sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_DELETE sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-BP_ID_SEL sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-BP_ID sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_MAIN sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_ADV sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-ADVISOR_TYPE sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-ADVISORID sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_PAR sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-FUNCTION sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-FUNCTION_NAME sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-CONTEXT_TYPE_NAME sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-CONTEXT_OTYPE sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-CONTEXT_OBJECT sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-CONTEXT_TYPE sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-CONTEXT_KEY sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-CONTEXT_KEY_NAME sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-MAIN_FUNCTION sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-BEGDA sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-ENDDA sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-SEL_DATE sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-DELIMDA sy-vline 
WA_PIQ_ST_ADVISOR_MAINT_PARAM_STR-TESTRUN sy-vline      INTO ld_text SEPARATED BY SPACE.

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