{"id":7610,"date":"2025-08-24T16:08:44","date_gmt":"2025-08-24T10:38:44","guid":{"rendered":"https:\/\/www.sapewmhelp.com\/?question=how-to-create-internal-table-dynamically"},"modified":"2025-08-24T16:08:44","modified_gmt":"2025-08-24T10:38:44","slug":"how-to-create-internal-table-dynamically","status":"publish","type":"question","link":"https:\/\/www.sapewmhelp.com\/?question=how-to-create-internal-table-dynamically","title":{"rendered":"How to create internal table dynamically ?"},"content":{"rendered":"

Internal tables are a core concept for storing structured data. You can create them dynamically at runtime using RTTS (Runtime Type Services).<\/p>\n

DATA: lo_descr TYPE REF TO cl_abap_structdescr,
\nlo_table TYPE REF TO cl_abap_tabledescr,
\nlr_data TYPE REF TO data,
\nlr_line TYPE REF TO data.<\/p>\n

“— Step 1: Define a structure dynamically
\nlo_descr = cl_abap_structdescr=>create(
\nVALUE #( ( name = ‘FIELD1’ type = cl_abap_elemdescr=>get_c( 10 ) )
\n( name = ‘FIELD2’ type = cl_abap_elemdescr=>get_i( ) ) )
\n).<\/p>\n

“— Step 2: Create internal table description
\nlo_table = cl_abap_tabledescr=>create( lo_descr ).<\/p>\n

“— Step 3: Create actual data object (the table)
\nCREATE DATA lr_data TYPE HANDLE lo_table.
\nASSIGN lr_data->* TO FIELD-SYMBOL(<itab>).<\/p>\n

“— Step 4: Create a line type and assign
\nCREATE DATA lr_line TYPE HANDLE lo_descr.
\nASSIGN lr_line->* TO FIELD-SYMBOL(<wa>).<\/p>\n

“— Step 5: Fill dynamically created table
\n<wa>-field1 = ‘Hello’.
\n<wa>-field2 = 123.
\nAPPEND <wa> TO <itab>.<\/p>\n

<wa>-field1 = ‘World’.
\n<wa>-field2 = 456.
\nAPPEND <wa> TO <itab>.<\/p>\n

“— Step 6: Loop through the dynamic internal table
\nLOOP AT <itab> ASSIGNING <wa>.
\nWRITE: \/ <wa>-field1, <wa>-field2.
\nENDLOOP.<\/p>\n

Key Points:<\/h5>\n
    \n
  1. Use RTTS (Runtime Type Services) \u2192 cl_abap_structdescr<\/code>, cl_abap_tabledescr<\/code>, cl_abap_elemdescr<\/code>.<\/li>\n
  2. Create data objects at runtime with CREATE DATA ... TYPE HANDLE<\/code>.<\/li>\n
  3. Use field symbols (<itab><\/code>, <wa><\/code>) to access the data.<\/li>\n<\/ol>\n

     <\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","question-category":[158],"question_tags":[178,357,177],"class_list":["post-7610","question","type-question","status-publish","hentry","question-category-abap","question_tags-abap","question_tags-internal-table","question_tags-sap"],"_links":{"self":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/question\/7610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/question"}],"about":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/types\/question"}],"author":[{"embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7610"}],"wp:attachment":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7610"}],"wp:term":[{"taxonomy":"question-category","embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fquestion-category&post=7610"},{"taxonomy":"question_tags","embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fquestion_tags&post=7610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}