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drwxr-xr-x
2022-05-23 22:35
authors.h
9.35
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2022-05-18 13:19
bounded_queue.h
6.61
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client_settings.h
1.89
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compat56.h
1.95
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config.h
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contributors.h
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create_options.h
4.21
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custom_conf.h
1.06
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datadict.h
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debug_sync.h
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derror.h
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des_key_file.h
1.21
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discover.h
1.57
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dur_prop.h
1.06
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embedded_priv.h
1.47
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event_data_objects.h
3.84
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event_db_repository.h
3.41
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event_parse_data.h
2.87
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event_queue.h
3.29
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event_scheduler.h
3.21
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events.h
4.43
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field.h
147.53
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filesort.h
4.61
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filesort_utils.h
4
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ft_global.h
3.04
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gcalc_slicescan.h
16.86
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gcalc_tools.h
11.38
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group_by_handler.h
3.08
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gstream.h
2.44
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ha_partition.h
50.87
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handler.h
155.48
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hash.h
4.39
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hash_filo.h
5.4
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heap.h
9.23
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hostname.h
5.35
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ilist.h
6.27
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init.h
955
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innodb_priv.h
1.39
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item.h
203.54
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item_cmpfunc.h
91.97
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item_create.h
6.76
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item_func.h
80.86
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item_geofunc.h
23.31
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item_inetfunc.h
7.61
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item_jsonfunc.h
13.04
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item_row.h
4.33
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item_strfunc.h
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item_subselect.h
51.04
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item_sum.h
56.22
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item_timefunc.h
41
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item_windowfunc.h
22.36
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item_xmlfunc.h
3.42
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key.h
2.05
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keycaches.h
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lex.h
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lex_hash.h
126.06
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lex_symbol.h
1.29
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lex_token.h
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lf.h
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lock.h
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log.h
41.65
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log_event.h
158.17
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log_event_old.h
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log_slow.h
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maria.h
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mdl.h
33.03
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mem_root_array.h
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message.h
2.06
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multi_range_read.h
22.17
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my_alarm.h
2.24
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my_apc.h
4.61
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my_atomic.h
16.66
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my_base.h
25.05
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my_bit.h
3.15
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my_bitmap.h
5.98
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my_check_opt.h
2.56
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my_compare.h
5.36
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my_context.h
6.59
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my_cpu.h
1.45
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my_crypt.h
904
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my_decimal.h
12.52
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my_default.h
2.47
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my_handler_errors.h
4.52
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my_json_writer.h
4.88
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my_libwrap.h
1.16
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my_md5.h
1.45
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my_nosys.h
1.4
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my_rdtsc.h
3.87
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my_rnd.h
1.04
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my_service_manager.h
1.47
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my_stacktrace.h
2.97
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my_time.h
8.75
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my_tree.h
3.89
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my_uctype.h
67.9
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my_user.h
1.12
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myisam.h
16.84
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myisamchk.h
4.7
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myisammrg.h
4.63
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myisampack.h
14.58
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mysql_async.h
1.77
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mysqld.h
31.32
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mysqld_default_groups.h
169
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mysqld_suffix.h
1.17
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mysys_err.h
2.81
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nt_servc.h
3
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opt_range.h
53.25
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opt_subselect.h
13.76
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parse_file.h
4.12
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partition_element.h
4.52
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partition_info.h
14.25
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password.h
1.17
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pcre.h
30.97
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probes_mysql.h
973
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probes_mysql_dtrace.h
32.23
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probes_mysql_nodtrace.h
4.89
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procedure.h
5.83
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protocol.h
9.72
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queues.h
3.51
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records.h
2.99
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repl_failsafe.h
1.69
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replication.h
15.96
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rijndael.h
1.67
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rpl_constants.h
3.28
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rpl_filter.h
4.41
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rpl_gtid.h
10.47
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rpl_handler.h
5.53
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rpl_injector.h
9.42
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rpl_mi.h
12.36
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rpl_parallel.h
13.3
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rpl_record.h
1.61
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rpl_record_old.h
1.37
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rpl_reporting.h
2.96
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rpl_rli.h
31.89
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rpl_tblmap.h
3.1
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rpl_utility.h
9.32
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scheduler.h
3.43
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service_versions.h
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session_tracker.h
8.8
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set_var.h
14.52
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slave.h
11.14
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sp.h
7.13
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sp_cache.h
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sp_head.h
36.17
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sp_pcontext.h
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sp_rcontext.h
15.43
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span.h
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spatial.h
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sql_acl.h
17.23
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sql_admin.h
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sql_alter.h
12
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sql_analyse.h
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sql_analyze_stmt.h
7.61
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sql_array.h
5.92
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sql_audit.h
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sql_base.h
24.9
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sql_basic_types.h
951
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sql_binlog.h
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sql_bitmap.h
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sql_bootstrap.h
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sql_cache.h
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sql_callback.h
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sql_class.h
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sql_cmd.h
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sql_connect.h
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sql_const.h
10.43
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sql_crypt.h
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sql_cte.h
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sql_cursor.h
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sql_db.h
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sql_delete.h
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sql_derived.h
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sql_digest.h
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sql_digest_stream.h
1.53
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sql_do.h
954
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sql_error.h
29.86
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sql_explain.h
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sql_expression_cache.h
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sql_get_diagnostics.h
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sql_handler.h
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sql_help.h
920
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sql_hset.h
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sql_insert.h
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sql_join_cache.h
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sql_lex.h
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sql_lifo_buffer.h
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sql_list.h
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sql_load.h
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sql_locale.h
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sql_manager.h
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sql_mode.h
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sql_parse.h
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sql_partition.h
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sql_partition_admin.h
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sql_plist.h
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sql_plugin.h
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sql_plugin_compat.h
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sql_prepare.h
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sql_priv.h
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sql_profile.h
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sql_reload.h
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sql_rename.h
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sql_repl.h
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sql_select.h
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sql_servers.h
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sql_show.h
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sql_signal.h
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sql_sort.h
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sql_statistics.h
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sql_string.h
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sql_table.h
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sql_tablespace.h
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sql_test.h
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sql_time.h
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sql_trigger.h
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sql_truncate.h
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sql_type.h
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sql_type_int.h
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sql_udf.h
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sql_union.h
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sql_update.h
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sql_view.h
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sql_window.h
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sql_yacc.h
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ssl_compat.h
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strfunc.h
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structs.h
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Save
Rename
#ifndef ITEM_STRFUNC_INCLUDED #define ITEM_STRFUNC_INCLUDED /* Copyright (c) 2000, 2011, Oracle and/or its affiliates. Copyright (c) 2009, 2019, MariaDB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ /* This file defines all string functions */ #ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ #endif extern size_t username_char_length; class MY_LOCALE; class Item_str_func :public Item_func { protected: /** Sets the result value of the function an empty string, using the current character set. No memory is allocated. @retval A pointer to the str_value member. */ String *make_empty_result() { /* Reset string length to an empty string. We don't use str_value.set() as we don't want to free and potentially have to reallocate the buffer for each call. */ str_value.length(0); str_value.set_charset(collation.collation); return &str_value; } public: Item_str_func(THD *thd): Item_func(thd) { decimals=NOT_FIXED_DEC; } Item_str_func(THD *thd, Item *a): Item_func(thd, a) {decimals=NOT_FIXED_DEC; } Item_str_func(THD *thd, Item *a, Item *b): Item_func(thd, a, b) { decimals=NOT_FIXED_DEC; } Item_str_func(THD *thd, Item *a, Item *b, Item *c): Item_func(thd, a, b, c) { decimals=NOT_FIXED_DEC; } Item_str_func(THD *thd, Item *a, Item *b, Item *c, Item *d): Item_func(thd, a, b, c, d) { decimals=NOT_FIXED_DEC; } Item_str_func(THD *thd, Item *a, Item *b, Item *c, Item *d, Item* e): Item_func(thd, a, b, c, d, e) { decimals=NOT_FIXED_DEC; } Item_str_func(THD *thd, List<Item> &list): Item_func(thd, list) { decimals=NOT_FIXED_DEC; } longlong val_int(); double val_real(); my_decimal *val_decimal(my_decimal *); enum Item_result result_type () const { return STRING_RESULT; } enum_field_types field_type() const { return string_field_type(); } void left_right_max_length(); bool fix_fields(THD *thd, Item **ref); void update_null_value() { StringBuffer<MAX_FIELD_WIDTH> tmp; (void) val_str(&tmp); } }; /* Functions that return values with ASCII repertoire */ class Item_str_ascii_func :public Item_str_func { String ascii_buf; public: Item_str_ascii_func(THD *thd): Item_str_func(thd) {} Item_str_ascii_func(THD *thd, Item *a): Item_str_func(thd, a) {} Item_str_ascii_func(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} Item_str_ascii_func(THD *thd, Item *a, Item *b, Item *c): Item_str_func(thd, a, b, c) {} String *val_str(String *str) { return val_str_from_val_str_ascii(str, &ascii_buf); } String *val_str_ascii(String *)= 0; }; /** Functions that return a checksum or a hash of the argument, or somehow else encode or decode the argument, returning an ASCII-repertoire string. */ class Item_str_ascii_checksum_func: public Item_str_ascii_func { public: Item_str_ascii_checksum_func(THD *thd, Item *a) :Item_str_ascii_func(thd, a) { } Item_str_ascii_checksum_func(THD *thd, Item *a, Item *b) :Item_str_ascii_func(thd, a, b) { } bool eq(const Item *item, bool binary_cmp) const { // Always use binary argument comparison: MD5('x') != MD5('X') return Item_func::eq(item, true); } }; /** Functions that return a checksum or a hash of the argument, or somehow else encode or decode the argument, returning a binary string. */ class Item_str_binary_checksum_func: public Item_str_func { public: Item_str_binary_checksum_func(THD *thd, Item *a) :Item_str_func(thd, a) { } Item_str_binary_checksum_func(THD *thd, Item *a, Item *b) :Item_str_func(thd, a, b) { } bool eq(const Item *item, bool binary_cmp) const { /* Always use binary argument comparison: FROM_BASE64('test') != FROM_BASE64('TEST') */ return Item_func::eq(item, true); } }; class Item_func_md5 :public Item_str_ascii_checksum_func { public: Item_func_md5(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {} String *val_str_ascii(String *); bool fix_length_and_dec() { fix_length_and_charset(32, default_charset()); return FALSE; } const char *func_name() const { return "md5"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_md5>(thd, mem_root, this); } }; class Item_func_sha :public Item_str_ascii_checksum_func { public: Item_func_sha(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {} String *val_str_ascii(String *); bool fix_length_and_dec(); const char *func_name() const { return "sha"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_sha>(thd, mem_root, this); } }; class Item_func_sha2 :public Item_str_ascii_checksum_func { public: Item_func_sha2(THD *thd, Item *a, Item *b) :Item_str_ascii_checksum_func(thd, a, b) {} String *val_str_ascii(String *); bool fix_length_and_dec(); const char *func_name() const { return "sha2"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_sha2>(thd, mem_root, this); } }; class Item_func_to_base64 :public Item_str_ascii_checksum_func { String tmp_value; public: Item_func_to_base64(THD *thd, Item *a) :Item_str_ascii_checksum_func(thd, a) {} String *val_str_ascii(String *); bool fix_length_and_dec(); const char *func_name() const { return "to_base64"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_to_base64>(thd, mem_root, this); } }; class Item_func_from_base64 :public Item_str_binary_checksum_func { String tmp_value; public: Item_func_from_base64(THD *thd, Item *a) :Item_str_binary_checksum_func(thd, a) { } String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "from_base64"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_from_base64>(thd, mem_root, this); } }; #include <my_crypt.h> class Item_aes_crypt :public Item_str_binary_checksum_func { enum { AES_KEY_LENGTH = 128 }; void create_key(String *user_key, uchar* key); protected: int what; String tmp_value; public: Item_aes_crypt(THD *thd, Item *a, Item *b) :Item_str_binary_checksum_func(thd, a, b) {} String *val_str(String *); }; class Item_func_aes_encrypt :public Item_aes_crypt { public: Item_func_aes_encrypt(THD *thd, Item *a, Item *b) :Item_aes_crypt(thd, a, b) {} bool fix_length_and_dec(); const char *func_name() const { return "aes_encrypt"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_aes_encrypt>(thd, mem_root, this); } }; class Item_func_aes_decrypt :public Item_aes_crypt { public: Item_func_aes_decrypt(THD *thd, Item *a, Item *b): Item_aes_crypt(thd, a, b) {} bool fix_length_and_dec(); const char *func_name() const { return "aes_decrypt"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_aes_decrypt>(thd, mem_root, this); } }; class Item_func_concat :public Item_str_func { String tmp_value; bool realloc_result(String *str, uint length) const; public: Item_func_concat(THD *thd, List<Item> &list): Item_str_func(thd, list) {} Item_func_concat(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "concat"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_concat>(thd, mem_root, this); } }; class Item_func_decode_histogram :public Item_str_func { public: Item_func_decode_histogram(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec() { collation.set(system_charset_info); max_length= MAX_BLOB_WIDTH; maybe_null= 1; return FALSE; } const char *func_name() const { return "decode_histogram"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_decode_histogram>(thd, mem_root, this); } }; class Item_func_concat_ws :public Item_str_func { String tmp_value; public: Item_func_concat_ws(THD *thd, List<Item> &list): Item_str_func(thd, list) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "concat_ws"; } table_map not_null_tables() const { return 0; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_concat_ws>(thd, mem_root, this); } }; class Item_func_reverse :public Item_str_func { String tmp_value; public: Item_func_reverse(THD *thd, Item *a): Item_str_func(thd, a) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "reverse"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_reverse>(thd, mem_root, this); } }; class Item_func_replace :public Item_str_func { String tmp_value,tmp_value2; public: Item_func_replace(THD *thd, Item *org, Item *find, Item *replace): Item_str_func(thd, org, find, replace) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "replace"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_replace>(thd, mem_root, this); } }; class Item_func_regexp_replace :public Item_str_func { Regexp_processor_pcre re; bool append_replacement(String *str, const LEX_CSTRING *source, const LEX_CSTRING *replace); public: Item_func_regexp_replace(THD *thd, Item *a, Item *b, Item *c): Item_str_func(thd, a, b, c) {} void cleanup() { DBUG_ENTER("Item_func_regex::cleanup"); Item_str_func::cleanup(); re.cleanup(); DBUG_VOID_RETURN; } String *val_str(String *str); bool fix_fields(THD *thd, Item **ref); bool fix_length_and_dec(); const char *func_name() const { return "regexp_replace"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return 0;} }; class Item_func_regexp_substr :public Item_str_func { Regexp_processor_pcre re; public: Item_func_regexp_substr(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} void cleanup() { DBUG_ENTER("Item_func_regex::cleanup"); Item_str_func::cleanup(); re.cleanup(); DBUG_VOID_RETURN; } String *val_str(String *str); bool fix_fields(THD *thd, Item **ref); bool fix_length_and_dec(); const char *func_name() const { return "regexp_substr"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return 0; } }; class Item_func_insert :public Item_str_func { String tmp_value; public: Item_func_insert(THD *thd, Item *org, Item *start, Item *length, Item *new_str): Item_str_func(thd, org, start, length, new_str) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "insert"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_insert>(thd, mem_root, this); } }; class Item_str_conv :public Item_str_func { protected: uint multiply; my_charset_conv_case converter; String tmp_value; public: Item_str_conv(THD *thd, Item *item): Item_str_func(thd, item) {} String *val_str(String *); }; class Item_func_lcase :public Item_str_conv { public: Item_func_lcase(THD *thd, Item *item): Item_str_conv(thd, item) {} const char *func_name() const { return "lcase"; } bool fix_length_and_dec(); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_lcase>(thd, mem_root, this); } }; class Item_func_ucase :public Item_str_conv { public: Item_func_ucase(THD *thd, Item *item): Item_str_conv(thd, item) {} const char *func_name() const { return "ucase"; } bool fix_length_and_dec(); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_ucase>(thd, mem_root, this); } }; class Item_func_left :public Item_str_func { String tmp_value; public: Item_func_left(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "left"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_left>(thd, mem_root, this); } }; class Item_func_right :public Item_str_func { String tmp_value; public: Item_func_right(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "right"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_right>(thd, mem_root, this); } }; class Item_func_substr :public Item_str_func { String tmp_value; public: Item_func_substr(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} Item_func_substr(THD *thd, Item *a, Item *b, Item *c): Item_str_func(thd, a, b, c) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "substr"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_substr>(thd, mem_root, this); } }; class Item_func_substr_index :public Item_str_func { String tmp_value; public: Item_func_substr_index(THD *thd, Item *a,Item *b,Item *c): Item_str_func(thd, a, b, c) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "substring_index"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_substr_index>(thd, mem_root, this); } }; class Item_func_trim :public Item_str_func { protected: String tmp_value; String remove; String *trimmed_value(String *res, uint32 offset, uint32 length) { tmp_value.set(*res, offset, length); /* Make sure to return correct charset and collation: TRIM(0x000000 FROM _ucs2 0x0061) should set charset to "binary" rather than to "ucs2". */ tmp_value.set_charset(collation.collation); return &tmp_value; } String *non_trimmed_value(String *res) { return trimmed_value(res, 0, res->length()); } public: Item_func_trim(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} Item_func_trim(THD *thd, Item *a): Item_str_func(thd, a) {} Sql_mode_dependency value_depends_on_sql_mode() const; String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "trim"; } void print(String *str, enum_query_type query_type); virtual const char *mode_name() const { return "both"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_trim>(thd, mem_root, this); } }; class Item_func_ltrim :public Item_func_trim { public: Item_func_ltrim(THD *thd, Item *a, Item *b): Item_func_trim(thd, a, b) {} Item_func_ltrim(THD *thd, Item *a): Item_func_trim(thd, a) {} Sql_mode_dependency value_depends_on_sql_mode() const { return Item_func::value_depends_on_sql_mode(); } String *val_str(String *); const char *func_name() const { return "ltrim"; } const char *mode_name() const { return "leading"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_ltrim>(thd, mem_root, this); } }; class Item_func_rtrim :public Item_func_trim { public: Item_func_rtrim(THD *thd, Item *a, Item *b): Item_func_trim(thd, a, b) {} Item_func_rtrim(THD *thd, Item *a): Item_func_trim(thd, a) {} String *val_str(String *); const char *func_name() const { return "rtrim"; } const char *mode_name() const { return "trailing"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_rtrim>(thd, mem_root, this); } }; /* Item_func_password -- new (4.1.1) PASSWORD() function implementation. Returns strcat('*', octet2hex(sha1(sha1(password)))). '*' stands for new password format, sha1(sha1(password) is so-called hash_stage2 value. Length of returned string is always 41 byte. To find out how entire authentication procedure works, see comments in password.c. */ class Item_func_password :public Item_str_ascii_checksum_func { public: enum PW_Alg {OLD, NEW}; private: char tmp_value[SCRAMBLED_PASSWORD_CHAR_LENGTH+1]; enum PW_Alg alg; bool deflt; public: Item_func_password(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a), alg(NEW), deflt(1) {} Item_func_password(THD *thd, Item *a, PW_Alg al): Item_str_ascii_checksum_func(thd, a), alg(al), deflt(0) {} String *val_str_ascii(String *str); bool fix_fields(THD *thd, Item **ref); bool fix_length_and_dec() { fix_length_and_charset((alg == 1 ? SCRAMBLED_PASSWORD_CHAR_LENGTH : SCRAMBLED_PASSWORD_CHAR_LENGTH_323), default_charset()); return FALSE; } const char *func_name() const { return ((deflt || alg == 1) ? "password" : "old_password"); } static char *alloc(THD *thd, const char *password, size_t pass_len, enum PW_Alg al); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_password>(thd, mem_root, this); } }; class Item_func_des_encrypt :public Item_str_binary_checksum_func { String tmp_value,tmp_arg; public: Item_func_des_encrypt(THD *thd, Item *a) :Item_str_binary_checksum_func(thd, a) {} Item_func_des_encrypt(THD *thd, Item *a, Item *b) :Item_str_binary_checksum_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec() { maybe_null=1; /* 9 = MAX ((8- (arg_len % 8)) + 1) */ max_length = args[0]->max_length + 9; return FALSE; } const char *func_name() const { return "des_encrypt"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_des_encrypt>(thd, mem_root, this); } }; class Item_func_des_decrypt :public Item_str_binary_checksum_func { String tmp_value; public: Item_func_des_decrypt(THD *thd, Item *a) :Item_str_binary_checksum_func(thd, a) {} Item_func_des_decrypt(THD *thd, Item *a, Item *b) :Item_str_binary_checksum_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec() { maybe_null=1; /* 9 = MAX ((8- (arg_len % 8)) + 1) */ max_length= args[0]->max_length; if (max_length >= 9U) max_length-= 9U; return FALSE; } const char *func_name() const { return "des_decrypt"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_des_decrypt>(thd, mem_root, this); } }; /** QQ: Item_func_encrypt should derive from Item_str_ascii_checksum_func. However, it should be fixed to handle UCS2, UTF16, UTF32 properly first, as the underlying crypt() call expects a null-terminated input string. */ class Item_func_encrypt :public Item_str_binary_checksum_func { String tmp_value; /* Encapsulate common constructor actions */ void constructor_helper() { collation.set(&my_charset_bin); } public: Item_func_encrypt(THD *thd, Item *a): Item_str_binary_checksum_func(thd, a) { constructor_helper(); } Item_func_encrypt(THD *thd, Item *a, Item *b) :Item_str_binary_checksum_func(thd, a, b) { constructor_helper(); } String *val_str(String *); bool fix_length_and_dec() { maybe_null=1; max_length = 13; return FALSE; } const char *func_name() const { return "encrypt"; } bool check_vcol_func_processor(void *arg) { return FALSE; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_encrypt>(thd, mem_root, this); } }; #include "sql_crypt.h" class Item_func_encode :public Item_str_binary_checksum_func { private: /** Whether the PRNG has already been seeded. */ bool seeded; protected: SQL_CRYPT sql_crypt; public: Item_func_encode(THD *thd, Item *a, Item *seed_arg): Item_str_binary_checksum_func(thd, a, seed_arg) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "encode"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_encode>(thd, mem_root, this); } protected: virtual void crypto_transform(String *); private: /** Provide a seed for the PRNG sequence. */ bool seed(); }; class Item_func_decode :public Item_func_encode { public: Item_func_decode(THD *thd, Item *a, Item *seed_arg): Item_func_encode(thd, a, seed_arg) {} const char *func_name() const { return "decode"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_decode>(thd, mem_root, this); } protected: void crypto_transform(String *); }; class Item_func_sysconst :public Item_str_func { public: Item_func_sysconst(THD *thd): Item_str_func(thd) { collation.set(system_charset_info,DERIVATION_SYSCONST); } Item *safe_charset_converter(THD *thd, CHARSET_INFO *tocs); /* Used to create correct Item name in new converted item in safe_charset_converter, return string representation of this function call */ virtual const char *fully_qualified_func_name() const = 0; bool check_vcol_func_processor(void *arg) { return mark_unsupported_function(fully_qualified_func_name(), arg, VCOL_SESSION_FUNC); } bool const_item() const; }; class Item_func_database :public Item_func_sysconst { public: Item_func_database(THD *thd): Item_func_sysconst(thd) {} String *val_str(String *); bool fix_length_and_dec() { max_length= NAME_CHAR_LEN * system_charset_info->mbmaxlen; maybe_null=1; return FALSE; } const char *func_name() const { return "database"; } const char *fully_qualified_func_name() const { return "database()"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_database>(thd, mem_root, this); } }; class Item_func_user :public Item_func_sysconst { protected: bool init (const char *user, const char *host); public: Item_func_user(THD *thd): Item_func_sysconst(thd) { str_value.set("", 0, system_charset_info); } String *val_str(String *) { DBUG_ASSERT(fixed == 1); return (null_value ? 0 : &str_value); } bool fix_fields(THD *thd, Item **ref); bool fix_length_and_dec() { max_length= (uint32) (username_char_length + HOSTNAME_LENGTH + 1) * SYSTEM_CHARSET_MBMAXLEN; return FALSE; } const char *func_name() const { return "user"; } const char *fully_qualified_func_name() const { return "user()"; } int save_in_field(Field *field, bool no_conversions) { return save_str_value_in_field(field, &str_value); } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_user>(thd, mem_root, this); } }; class Item_func_current_user :public Item_func_user { Name_resolution_context *context; public: Item_func_current_user(THD *thd, Name_resolution_context *context_arg): Item_func_user(thd), context(context_arg) {} bool fix_fields(THD *thd, Item **ref); const char *func_name() const { return "current_user"; } const char *fully_qualified_func_name() const { return "current_user()"; } bool check_vcol_func_processor(void *arg) { context= 0; return mark_unsupported_function(fully_qualified_func_name(), arg, VCOL_SESSION_FUNC); } }; class Item_func_current_role :public Item_func_sysconst { Name_resolution_context *context; public: Item_func_current_role(THD *thd, Name_resolution_context *context_arg): Item_func_sysconst(thd), context(context_arg) {} bool fix_fields(THD *thd, Item **ref); bool fix_length_and_dec() { max_length= (uint32) username_char_length * SYSTEM_CHARSET_MBMAXLEN; return FALSE; } int save_in_field(Field *field, bool no_conversions) { return save_str_value_in_field(field, &str_value); } const char *func_name() const { return "current_role"; } const char *fully_qualified_func_name() const { return "current_role()"; } String *val_str(String *) { DBUG_ASSERT(fixed == 1); return null_value ? NULL : &str_value; } bool check_vcol_func_processor(void *arg) { context= 0; return mark_unsupported_function(fully_qualified_func_name(), arg, VCOL_SESSION_FUNC); } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_current_role>(thd, mem_root, this); } }; class Item_func_soundex :public Item_str_func { String tmp_value; public: Item_func_soundex(THD *thd, Item *a): Item_str_func(thd, a) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "soundex"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_soundex>(thd, mem_root, this); } }; class Item_func_elt :public Item_str_func { public: Item_func_elt(THD *thd, List<Item> &list): Item_str_func(thd, list) {} double val_real(); longlong val_int(); String *val_str(String *str); bool fix_length_and_dec(); const char *func_name() const { return "elt"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_elt>(thd, mem_root, this); } }; class Item_func_make_set :public Item_str_func { String tmp_str; public: Item_func_make_set(THD *thd, List<Item> &list): Item_str_func(thd, list) {} String *val_str(String *str); bool fix_length_and_dec(); const char *func_name() const { return "make_set"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_make_set>(thd, mem_root, this); } }; class Item_func_format :public Item_str_ascii_func { MY_LOCALE *locale; public: Item_func_format(THD *thd, Item *org, Item *dec): Item_str_ascii_func(thd, org, dec) {} Item_func_format(THD *thd, Item *org, Item *dec, Item *lang): Item_str_ascii_func(thd, org, dec, lang) {} MY_LOCALE *get_locale(Item *item); String *val_str_ascii(String *); bool fix_length_and_dec(); const char *func_name() const { return "format"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_format>(thd, mem_root, this); } }; class Item_func_char :public Item_str_func { public: Item_func_char(THD *thd, List<Item> &list): Item_str_func(thd, list) { collation.set(&my_charset_bin); } Item_func_char(THD *thd, List<Item> &list, CHARSET_INFO *cs): Item_str_func(thd, list) { collation.set(cs); } String *val_str(String *); bool fix_length_and_dec() { max_length= arg_count * 4; return FALSE; } const char *func_name() const { return "char"; } void print(String *str, enum_query_type query_type); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_char>(thd, mem_root, this); } }; class Item_func_repeat :public Item_str_func { String tmp_value; public: Item_func_repeat(THD *thd, Item *arg1, Item *arg2): Item_str_func(thd, arg1, arg2) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "repeat"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_repeat>(thd, mem_root, this); } }; class Item_func_space :public Item_str_func { public: Item_func_space(THD *thd, Item *arg1): Item_str_func(thd, arg1) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "space"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_space>(thd, mem_root, this); } }; class Item_func_binlog_gtid_pos :public Item_str_func { public: Item_func_binlog_gtid_pos(THD *thd, Item *arg1, Item *arg2): Item_str_func(thd, arg1, arg2) {} String *val_str(String *); bool fix_length_and_dec(); const char *func_name() const { return "binlog_gtid_pos"; } bool check_vcol_func_processor(void *arg) { return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE); } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_binlog_gtid_pos>(thd, mem_root, this); } }; class Item_func_pad: public Item_str_func { protected: String tmp_value, pad_str; public: Item_func_pad(THD *thd, Item *arg1, Item *arg2, Item *arg3): Item_str_func(thd, arg1, arg2, arg3) {} bool fix_length_and_dec(); }; class Item_func_rpad :public Item_func_pad { public: Item_func_rpad(THD *thd, Item *arg1, Item *arg2, Item *arg3): Item_func_pad(thd, arg1, arg2, arg3) {} String *val_str(String *); const char *func_name() const { return "rpad"; } Sql_mode_dependency value_depends_on_sql_mode() const; Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_rpad>(thd, mem_root, this); } }; class Item_func_lpad :public Item_func_pad { public: Item_func_lpad(THD *thd, Item *arg1, Item *arg2, Item *arg3): Item_func_pad(thd, arg1, arg2, arg3) {} String *val_str(String *); const char *func_name() const { return "lpad"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_lpad>(thd, mem_root, this); } }; class Item_func_conv :public Item_str_func { public: Item_func_conv(THD *thd, Item *a, Item *b, Item *c): Item_str_func(thd, a, b, c) {} const char *func_name() const { return "conv"; } String *val_str(String *); bool fix_length_and_dec() { collation.set(default_charset()); max_length=64; maybe_null= 1; return FALSE; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_conv>(thd, mem_root, this); } }; class Item_func_hex :public Item_str_ascii_checksum_func { String tmp_value; public: Item_func_hex(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {} const char *func_name() const { return "hex"; } String *val_str_ascii(String *); bool fix_length_and_dec() { collation.set(default_charset()); decimals=0; fix_char_length(args[0]->max_length * 2); return FALSE; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_hex>(thd, mem_root, this); } }; class Item_func_unhex :public Item_str_func { String tmp_value; public: Item_func_unhex(THD *thd, Item *a): Item_str_func(thd, a) { /* there can be bad hex strings */ maybe_null= 1; } const char *func_name() const { return "unhex"; } String *val_str(String *); bool fix_length_and_dec() { collation.set(&my_charset_bin); decimals=0; max_length=(1+args[0]->max_length)/2; return FALSE; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_unhex>(thd, mem_root, this); } }; #ifndef DBUG_OFF class Item_func_like_range :public Item_str_func { protected: String min_str; String max_str; const bool is_min; public: Item_func_like_range(THD *thd, Item *a, Item *b, bool is_min_arg): Item_str_func(thd, a, b), is_min(is_min_arg) { maybe_null= 1; } String *val_str(String *); bool fix_length_and_dec() { collation.set(args[0]->collation); decimals=0; max_length= MAX_BLOB_WIDTH; return FALSE; } }; class Item_func_like_range_min :public Item_func_like_range { public: Item_func_like_range_min(THD *thd, Item *a, Item *b): Item_func_like_range(thd, a, b, true) { } const char *func_name() const { return "like_range_min"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_like_range_min>(thd, mem_root, this); } }; class Item_func_like_range_max :public Item_func_like_range { public: Item_func_like_range_max(THD *thd, Item *a, Item *b): Item_func_like_range(thd, a, b, false) { } const char *func_name() const { return "like_range_max"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_like_range_max>(thd, mem_root, this); } }; #endif class Item_func_binary :public Item_str_func { public: Item_func_binary(THD *thd, Item *a): Item_str_func(thd, a) {} String *val_str(String *a) { DBUG_ASSERT(fixed == 1); String *tmp=args[0]->val_str(a); null_value=args[0]->null_value; if (tmp) tmp->set_charset(&my_charset_bin); return tmp; } bool fix_length_and_dec() { collation.set(&my_charset_bin); max_length=args[0]->max_length; return FALSE; } void print(String *str, enum_query_type query_type); const char *func_name() const { return "cast_as_binary"; } bool need_parentheses_in_default() { return true; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_binary>(thd, mem_root, this); } }; class Item_load_file :public Item_str_func { String tmp_value; public: Item_load_file(THD *thd, Item *a): Item_str_func(thd, a) {} String *val_str(String *); const char *func_name() const { return "load_file"; } bool fix_length_and_dec() { collation.set(&my_charset_bin, DERIVATION_COERCIBLE); maybe_null=1; max_length=MAX_BLOB_WIDTH; return FALSE; } bool check_vcol_func_processor(void *arg) { return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE); } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_load_file>(thd, mem_root, this); } }; class Item_func_export_set: public Item_str_func { public: Item_func_export_set(THD *thd, Item *a, Item *b, Item* c): Item_str_func(thd, a, b, c) {} Item_func_export_set(THD *thd, Item *a, Item *b, Item* c, Item* d): Item_str_func(thd, a, b, c, d) {} Item_func_export_set(THD *thd, Item *a, Item *b, Item* c, Item* d, Item* e): Item_str_func(thd, a, b, c, d, e) {} String *val_str(String *str); bool fix_length_and_dec(); const char *func_name() const { return "export_set"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_export_set>(thd, mem_root, this); } }; class Item_func_quote :public Item_str_func { String tmp_value; public: Item_func_quote(THD *thd, Item *a): Item_str_func(thd, a) {} const char *func_name() const { return "quote"; } String *val_str(String *); bool fix_length_and_dec() { collation.set(args[0]->collation); ulonglong max_result_length= (ulonglong) args[0]->max_length * 2 + 2 * collation.collation->mbmaxlen; max_length= (uint32) MY_MIN(max_result_length, MAX_BLOB_WIDTH); return FALSE; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_quote>(thd, mem_root, this); } }; class Item_func_conv_charset :public Item_str_func { bool use_cached_value; String tmp_value; public: bool safe; Item_func_conv_charset(THD *thd, Item *a, CHARSET_INFO *cs): Item_str_func(thd, a) { collation.set(cs, DERIVATION_IMPLICIT); use_cached_value= 0; safe= 0; } Item_func_conv_charset(THD *thd, Item *a, CHARSET_INFO *cs, bool cache_if_const): Item_str_func(thd, a) { collation.set(cs, DERIVATION_IMPLICIT); if (cache_if_const && args[0]->const_item() && !args[0]->is_expensive()) { uint errors= 0; String tmp, *str= args[0]->val_str(&tmp); if (!str || str_value.copy(str->ptr(), str->length(), str->charset(), cs, &errors)) null_value= 1; use_cached_value= 1; str_value.mark_as_const(); safe= (errors == 0); } else { use_cached_value= 0; /* Conversion from and to "binary" is safe. Conversion to Unicode is safe. Conversion from an expression with the ASCII repertoire to any character set that can store characters U+0000..U+007F is safe: - All supported multibyte character sets can store U+0000..U+007F - All supported 7bit character sets can store U+0000..U+007F except those marked with MY_CS_NONASCII (e.g. swe7). Other kind of conversions are potentially lossy. */ safe= (args[0]->collation.collation == &my_charset_bin || cs == &my_charset_bin || (cs->state & MY_CS_UNICODE) || (args[0]->collation.repertoire == MY_REPERTOIRE_ASCII && (cs->mbmaxlen > 1 || !(cs->state & MY_CS_NONASCII)))); } } bool is_json_type() { return args[0]->is_json_type(); } String *val_str(String *); longlong val_int() { if (args[0]->result_type() == STRING_RESULT) return Item_str_func::val_int(); longlong res= args[0]->val_int(); if ((null_value= args[0]->null_value)) return 0; return res; } double val_real() { if (args[0]->result_type() == STRING_RESULT) return Item_str_func::val_real(); double res= args[0]->val_real(); if ((null_value= args[0]->null_value)) return 0; return res; } my_decimal *val_decimal(my_decimal *d) { if (args[0]->result_type() == STRING_RESULT) return Item_str_func::val_decimal(d); my_decimal *res= args[0]->val_decimal(d); if ((null_value= args[0]->null_value)) return NULL; return res; } bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate) { if (args[0]->result_type() == STRING_RESULT) return Item_str_func::get_date(ltime, fuzzydate); bool res= args[0]->get_date(ltime, fuzzydate); if ((null_value= args[0]->null_value)) return 1; return res; } bool fix_length_and_dec(); const char *func_name() const { return "convert"; } void print(String *str, enum_query_type query_type); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_conv_charset>(thd, mem_root, this); } }; class Item_func_set_collation :public Item_str_func { public: Item_func_set_collation(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {} String *val_str(String *); bool fix_length_and_dec(); bool eq(const Item *item, bool binary_cmp) const; const char *func_name() const { return "collate"; } enum precedence precedence() const { return COLLATE_PRECEDENCE; } enum Functype functype() const { return COLLATE_FUNC; } void print(String *str, enum_query_type query_type); Item_field *field_for_view_update() { /* this function is transparent for view updating */ return args[0]->field_for_view_update(); } bool need_parentheses_in_default() { return true; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_set_collation>(thd, mem_root, this); } }; class Item_func_expr_str_metadata :public Item_str_func { public: Item_func_expr_str_metadata(THD *thd, Item *a): Item_str_func(thd, a) { } bool fix_length_and_dec() { collation.set(system_charset_info); max_length= 64 * collation.collation->mbmaxlen; // should be enough maybe_null= 0; return FALSE; }; table_map not_null_tables() const { return 0; } Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond) { return this; } bool const_item() const { return true; } }; class Item_func_charset :public Item_func_expr_str_metadata { public: Item_func_charset(THD *thd, Item *a) :Item_func_expr_str_metadata(thd, a) { } String *val_str(String *); const char *func_name() const { return "charset"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_charset>(thd, mem_root, this); } }; class Item_func_collation :public Item_func_expr_str_metadata { public: Item_func_collation(THD *thd, Item *a) :Item_func_expr_str_metadata(thd, a) {} String *val_str(String *); const char *func_name() const { return "collation"; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_collation>(thd, mem_root, this); } }; class Item_func_weight_string :public Item_str_func { String tmp_value; uint flags; uint nweights; uint result_length; public: Item_func_weight_string(THD *thd, Item *a, uint result_length_arg, uint nweights_arg, uint flags_arg): Item_str_func(thd, a) { nweights= nweights_arg; flags= flags_arg; result_length= result_length_arg; } const char *func_name() const { return "weight_string"; } String *val_str(String *); bool fix_length_and_dec(); bool eq(const Item *item, bool binary_cmp) const { if (!Item_str_func::eq(item, binary_cmp)) return false; Item_func_weight_string *that= (Item_func_weight_string *)item; return this->flags == that->flags && this->nweights == that->nweights && this->result_length == that->result_length; } Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond) { return this; } void print(String *str, enum_query_type query_type); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_weight_string>(thd, mem_root, this); } }; class Item_func_crc32 :public Item_int_func { String value; public: Item_func_crc32(THD *thd, Item *a): Item_int_func(thd, a) { unsigned_flag= 1; } const char *func_name() const { return "crc32"; } bool fix_length_and_dec() { max_length=10; return FALSE; } longlong val_int(); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_crc32>(thd, mem_root, this); } }; class Item_func_uncompressed_length : public Item_int_func { String value; public: Item_func_uncompressed_length(THD *thd, Item *a): Item_int_func(thd, a) {} const char *func_name() const{return "uncompressed_length";} bool fix_length_and_dec() { max_length=10; maybe_null= true; return FALSE; } longlong val_int(); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_uncompressed_length>(thd, mem_root, this); } }; #ifdef HAVE_COMPRESS #define ZLIB_DEPENDED_FUNCTION ; #else #define ZLIB_DEPENDED_FUNCTION { null_value=1; return 0; } #endif class Item_func_compress: public Item_str_binary_checksum_func { String tmp_value; public: Item_func_compress(THD *thd, Item *a) :Item_str_binary_checksum_func(thd, a) {} bool fix_length_and_dec() { max_length= (args[0]->max_length * 120) / 100 + 12; return FALSE; } const char *func_name() const{return "compress";} String *val_str(String *) ZLIB_DEPENDED_FUNCTION Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_compress>(thd, mem_root, this); } }; class Item_func_uncompress: public Item_str_binary_checksum_func { String tmp_value; public: Item_func_uncompress(THD *thd, Item *a) :Item_str_binary_checksum_func(thd, a) {} bool fix_length_and_dec() { maybe_null= 1; max_length= MAX_BLOB_WIDTH; return FALSE; } const char *func_name() const{return "uncompress";} String *val_str(String *) ZLIB_DEPENDED_FUNCTION Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_uncompress>(thd, mem_root, this); } }; class Item_func_uuid: public Item_str_func { public: Item_func_uuid(THD *thd): Item_str_func(thd) {} bool fix_length_and_dec() { collation.set(system_charset_info, DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII); fix_char_length(MY_UUID_STRING_LENGTH); return FALSE; } bool const_item() const { return false; } table_map used_tables() const { return RAND_TABLE_BIT; } const char *func_name() const{ return "uuid"; } String *val_str(String *); bool check_vcol_func_processor(void *arg) { return mark_unsupported_function(func_name(), "()", arg, VCOL_NON_DETERMINISTIC); } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_uuid>(thd, mem_root, this); } }; class Item_func_dyncol_create: public Item_str_func { protected: DYNCALL_CREATE_DEF *defs; DYNAMIC_COLUMN_VALUE *vals; uint *keys_num; LEX_STRING *keys_str; bool names, force_names; bool prepare_arguments(THD *thd, bool force_names); void print_arguments(String *str, enum_query_type query_type); public: Item_func_dyncol_create(THD *thd, List<Item> &args, DYNCALL_CREATE_DEF *dfs); bool fix_fields(THD *thd, Item **ref); bool fix_length_and_dec(); const char *func_name() const{ return "column_create"; } String *val_str(String *); void print(String *str, enum_query_type query_type); enum Functype functype() const { return DYNCOL_FUNC; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_dyncol_create>(thd, mem_root, this); } }; class Item_func_dyncol_add: public Item_func_dyncol_create { public: Item_func_dyncol_add(THD *thd, List<Item> &args_arg, DYNCALL_CREATE_DEF *dfs): Item_func_dyncol_create(thd, args_arg, dfs) {} const char *func_name() const{ return "column_add"; } String *val_str(String *); void print(String *str, enum_query_type query_type); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_dyncol_add>(thd, mem_root, this); } }; class Item_func_dyncol_json: public Item_str_func { public: Item_func_dyncol_json(THD *thd, Item *str): Item_str_func(thd, str) {collation.set(DYNCOL_UTF);} const char *func_name() const{ return "column_json"; } String *val_str(String *); bool fix_length_and_dec() { max_length= MAX_BLOB_WIDTH; maybe_null= 1; decimals= 0; return FALSE; } Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_dyncol_json>(thd, mem_root, this); } }; /* The following functions is always called from an Item_cast function */ class Item_dyncol_get: public Item_str_func { public: Item_dyncol_get(THD *thd, Item *str, Item *num): Item_str_func(thd, str, num) {} bool fix_length_and_dec() { maybe_null= 1;; max_length= MAX_BLOB_WIDTH; return FALSE; } /* Mark that collation can change between calls */ bool dynamic_result() { return 1; } const char *func_name() const { return "column_get"; } String *val_str(String *); longlong val_int(); longlong val_int_signed_typecast() { unsigned_flag= false; // Mark that we want to have a signed value longlong value= val_int(); // val_int() can change unsigned_flag if (!null_value && unsigned_flag && value < 0) push_note_converted_to_negative_complement(current_thd); return value; } longlong val_int_unsigned_typecast() { unsigned_flag= true; // Mark that we want to have an unsigned value longlong value= val_int(); // val_int() can change unsigned_flag if (!null_value && unsigned_flag == 0 && value < 0) push_note_converted_to_positive_complement(current_thd); return value; } double val_real(); my_decimal *val_decimal(my_decimal *); bool get_dyn_value(THD *thd, DYNAMIC_COLUMN_VALUE *val, String *tmp); bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate); void print(String *str, enum_query_type query_type); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_dyncol_get>(thd, mem_root, this); } }; class Item_func_dyncol_list: public Item_str_func { public: Item_func_dyncol_list(THD *thd, Item *str): Item_str_func(thd, str) {collation.set(DYNCOL_UTF);} bool fix_length_and_dec() { maybe_null= 1; max_length= MAX_BLOB_WIDTH; return FALSE; }; const char *func_name() const{ return "column_list"; } String *val_str(String *); Item *get_copy(THD *thd, MEM_ROOT *mem_root) { return get_item_copy<Item_func_dyncol_list>(thd, mem_root, this); } }; #endif /* ITEM_STRFUNC_INCLUDED */