Alexander Barkov a91b78049a MDEV-36705 Preparations for associative arrays (MDEV-34319) ...

- Moving the definition of "class Type_handler_row" into a new file
  sql_type_row.h. Also moving *some* of its methods into sql_type_row.cc.
  The rest of the methods will be moved in the patch for MDEV-34319.
  Moving the definition of my_var_sp_row_field into sql_type_row.cc.

- Fixing the grammar for function_call_generic to get the first
  production as "ident_cli_func" rather than "ident_func".
  The upcoming patch needs to know the position of the function name
  within the client query.

- Adding new data types to store data types defined by "TYPE" declarations:

  * sp_type_def
  * sp_type_def_list

  sp_pcontext now derives from sp_type_def_list

- A new virtual method in Field:

  virtual Item_field *make_item_field_spvar(THD *thd,
                                            const Spvar_definition &def);
  Using it in sp_rcontext::init_var_items().

- Fixing my_var_sp to get sp_rcontext_addr in the parameter
  instead of two separate parameters (rcontext_handler + offset).

- Adding new virtual methods in my_var:

  virtual bool set_row(THD *thd, List<Item> &select_list);

  It's used when a select_list record is assigned to a
  single composite variable, such as ROW, specified in the INTO clause.
  Using it in select_dumpvar::send_data().

  virtual bool check_assignability(THD *thd,
                                   const List<Item> &select_list,
                                   bool *assign_as_row) const;

  It's used to check if the select_list is compatible with
  a single INTO variable, in select_dumpvar::prepare().

- Fixing LEX methods create_outvar() to get identifiers
  a Lex_ident_sys_st values instead of generic LEX_CSTRING values.

- Adding virtual methods in Type_handler:

  // Used in Item_func_null_predicate::check_arguments()
  virtual bool has_null_predicate() const;

  // Used in LEX::sp_variable_declarations_finalize()
  virtual bool sp_variable_declarations_finalize(THD *thd,
                                                 LEX *lex, int nvars,
                                                 const Column_definition &def)
                                                                        const;
  // Handle SELECT 1 INTO spvar;
  virtual my_var *make_outvar(THD *thd,
                              const Lex_ident_sys_st &name,
                              const sp_rcontext_addr &addr,
                              sp_head *sphead,
                              bool validate_only) const;

  // Handle SELECT 1 INTO spvar.field;
  virtual my_var *make_outvar_field(THD *thd,
                                    const Lex_ident_sys_st &name,
                                    const sp_rcontext_addr &addr,
                                    const Lex_ident_sys_st &field,
                                    sp_head *sphead,
                                    bool validate_only) const;

  // create the value in: DECLARE var rec_t DEFAULT rec_t(1,'c');
  virtual Item *make_typedef_constructor_item(THD *thd,
                                              const sp_type_def &def,
                                              List<Item> *arg_list) const;

- A new helper method:
  Row_definition_list *Row_definition_list::deep_copy(THD *thd) const;

2025-08-01 18:01:20 +02:00

270 KiB

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