Method prepare

sql/sql_insert.cc:4253–4441

int
select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
  LEX *lex= thd->lex;
  int res= 0;
  table_map map= 0;
  SELECT_LEX *lex_current_select_save= lex->current_select;
  DBUG_ENTER("select_insert::prepare");

  unit= u;

  /*
    Since table in which we are going to insert is added to the first
    select, LEX::current_select should point to the first select while
    we are fixing fields from insert list.
  */
  lex->current_select= lex->first_select_lex();

  res= (setup_returning_fields(thd, table_list) ||
        setup_fields(thd, Ref_ptr_array(), values, MARK_COLUMNS_READ, 0, 0,
                     0) ||
        check_insert_fields(thd, table_list, *fields, values,
                            !insert_into_view, 1, &map));

  if (!res)
  {
     /*
        Check that all colN=exprN pairs are compatible for assignment, e.g.:
          INSERT INTO t1 (col1, col2) VALUES (expr1, expr2);
          INSERT INTO t1 SET col1=expr1, col2=expr2;
     */
     res= table_list->table->check_assignability_opt_fields(*fields, values,
                                                            lex->ignore);
  }

  if (!res && fields->elements)
  {
    Abort_on_warning_instant_set aws(thd,
                                     !info.ignore && thd->is_strict_mode());
    res= check_that_all_fields_are_given_values(thd, table_list->table,
                                                table_list);
  }

  if (info.handle_duplicates == DUP_UPDATE && !res)
  {
    Name_resolution_context *context= &lex->first_select_lex()->context;
    Name_resolution_context_state ctx_state;

    /* Save the state of the current name resolution context. */
    ctx_state.save_state(context, table_list);

    /* Perform name resolution only in the first table - 'table_list'. */
    table_list->next_local= 0;
    context->resolve_in_table_list_only(table_list);

    lex->first_select_lex()->no_wrap_view_item= TRUE;
    res= res ||
      check_update_fields(thd, context->table_list,