diff options
Diffstat (limited to 'sql/item_func.h')
| -rw-r--r-- | sql/item_func.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/sql/item_func.h b/sql/item_func.h index 754b1cd1eb2..52bf7f661d1 100644 --- a/sql/item_func.h +++ b/sql/item_func.h @@ -56,8 +56,117 @@ protected: bool check_argument_types_can_return_text(uint start, uint end) const; bool check_argument_types_can_return_date(uint start, uint end) const; bool check_argument_types_can_return_time(uint start, uint end) const; + + void print_schema_qualified_name(String *to, + const LEX_CSTRING &schema_name, + const char *function_name) const + { + // e.g. oracle_schema.func() + to->append(schema_name); + to->append('.'); + to->append(function_name); + } + + void print_name_with_optional_suffix(String *to, + const char *function_name, + const LEX_CSTRING &suffix) const + { + // e.g. func_oracle() + to->append(function_name); + if (suffix.length) + { + to->append("_"); + to->append(suffix); + } + } + + void print_sql_mode_dependent_name(String *to, enum_query_type query_type, + const Schema &schema, + const char *function_name, + const LEX_CSTRING &suffix) const + { + if (query_type & QT_ITEM_FUNC_FORCE_SCHEMA_NAME) + { + DBUG_ASSERT((query_type & QT_FOR_FRM) == 0); + print_schema_qualified_name(to, schema.name(), function_name); + } + else if (query_type & QT_FOR_FRM) + { + // e.g. substr_oracle() + DBUG_ASSERT((query_type & QT_ITEM_FUNC_FORCE_SCHEMA_NAME) == 0); + print_name_with_optional_suffix(to, function_name, suffix); + } + else if (&schema != Schema::find_implied(current_thd)) + print_schema_qualified_name(to, schema.name(), function_name); + else + to->append(function_name); + } + + void print_sql_mode_dependent_name(String *to, enum_query_type query_type, + const Schema &schema, + const char *function_name) const + { + static const LEX_CSTRING oracle= {STRING_WITH_LEN("oracle")}; + static const LEX_CSTRING empty= {NULL, 0}; + const LEX_CSTRING suffix= &schema == &oracle_schema_ref ? oracle : empty; + print_sql_mode_dependent_name(to, query_type, + schema, function_name, suffix); + } + void print_sql_mode_dependent_name(String *to, enum_query_type query_type, + const char *function_name) const + { + print_sql_mode_dependent_name(to, query_type, *schema(), function_name); + } + void print_sql_mode_dependent(String *to, enum_query_type query_type) + { + print_sql_mode_dependent_name(to, query_type, func_name()); + print_args_parenthesized(to, query_type); + } public: + // Print an error message for a builtin-schema qualified function call + static void wrong_param_count_error(const LEX_CSTRING &schema_name, + const LEX_CSTRING &func_name); + + // Check that the number of arguments is greater or equal to "expected" + static bool create_check_args_ge(const LEX_CSTRING &name, + const List<Item> *item_list, + uint expected) + { + DBUG_ASSERT(expected > 0); + if (!item_list || item_list->elements < expected) + { + my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str); + return true; + } + return false; + } + + // Check that the number of arguments is less or equal to "expected" + static bool create_check_args_le(const LEX_CSTRING &name, + const List<Item> *item_list, + uint expected) + { + DBUG_ASSERT(expected > 0); + if (!item_list || item_list->elements > expected) + { + my_error(ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT, MYF(0), name.str); + return true; + } + return false; + } + + // Check that the number of arguments is in the allowed range + static bool create_check_args_between(const LEX_CSTRING &name, + const List<Item> *item_list, + uint min_arg_count, + uint max_arg_count) + { + DBUG_ASSERT(min_arg_count < max_arg_count); + return create_check_args_ge(name, item_list, min_arg_count) || + create_check_args_le(name, item_list, max_arg_count); + } + table_map not_null_tables_cache; enum Functype { UNKNOWN_FUNC,EQ_FUNC,EQUAL_FUNC,NE_FUNC,LT_FUNC,LE_FUNC, @@ -174,6 +283,12 @@ public: virtual void print(String *str, enum_query_type query_type); void print_op(String *str, enum_query_type query_type); void print_args(String *str, uint from, enum_query_type query_type); + void print_args_parenthesized(String *str, enum_query_type query_type) + { + str->append('('); + print_args(str, 0, query_type); + str->append(')'); + } inline bool get_arg0_date(MYSQL_TIME *ltime, ulonglong fuzzy_date) { DBUG_ASSERT(!(fuzzy_date & TIME_TIME_ONLY)); |