MySQL 5.5、5.6 返回 NULL,MariaDB 10.1 和 MySQL 5.7 返回 2016-08-03 23:38:58。
- TIMESTAMP() 的第一个参数为 time 类型时,MySQL 5.5 无法自动转换为 timestamp 类型,因而返回 NULL。
- MySQL 5.7 和 MariaDB 则将 time 类型自动转为 timestamp 类型,即将当前的日期+输入的 time 变量。
变量名相同意味着主要功能也相同。
<table>
<tr><th width="20%">参数名</th><th width="30%">MariaDB 10.1</th><th width="30%">MySQL 5.6</th></tr>
<tr>
<td>old_passwords</td>
<td>OFF</td>
<td>0</td></tr>
<tr>
<td>tmpdir</td>
<td>/tmp/5cXm2hHsWi/mysqld.1</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/tmp/mysqld.1</td></tr>
<tr>
<td>version</td>
<td>10.1.9-MariaDB-log</td>
<td>5.6.31-log</td></tr>
<tr>
<td>slow_query_log_file</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/mysql-test/var/mysqld.1/mysqld-slow.log</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/mysqld.1/mysqld-slow.log</td></tr>
<tr>
<td>table_definition_cache</td>
<td>400</td>
<td>1400</td></tr>
<tr>
<td>datadir</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/mysql-test/var/mysqld.1/data/</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/mysqld.1/data/</td></tr>
<tr>
<td>pid_file</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/mysql-test/var/run/mysqld.1.pid</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/run/mysqld.1.pid</td></tr>
<tr>
<td>max_seeks_for_key</td>
<td>4294967295</td>
<td>18446744073709500000</td></tr>
<tr>
<td>slave_load_tmpdir</td>
<td>/tmp/5cXm2hHsWi/mysqld.1</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/tmp/mysqld.1</td></tr>
<tr>
<td>secure_file_priv</td>
<td> /data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/mysql-test/var/</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/</td></tr>
<tr>
<td>sql_mode</td>
<td>NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION </td>
<td>NO_ENGINE_SUBSTITUTION</td></tr>
<tr>
<td>ssl_cert</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/mysql-test/std_data/server-cert.pem</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/mysql-test/std_data/server-cert.pem</td></tr>
<tr>
<td>ssl_ca</td>
<td> /data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/mysql-test/std_data/cacert.pem</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/mysql-test/std_data/cacert.pem</td></tr>
<tr>
<td>open_files_limit</td>
<td>1024</td>
<td>4161</td></tr>
<tr>
<td>binlog_checksum</td>
<td>NONE</td>
<td>CRC32</td></tr>
<tr>
<td>basedir</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6</td></tr>
<tr>
<td>query_alloc_block_size</td>
<td>16384</td>
<td>8192</td></tr>
<tr>
<td>innodb_max_dirty_pages_pct</td>
<td>75.000000</td>
<td>75</td></tr>
<tr>
<td>ssl_key</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/mysql-test/std_data/server-key.pem</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/mysql-test/std_data/server-key.pem</td></tr>
<tr>
<td>myisam_sort_buffer_size</td>
<td>134216704</td>
<td>8388608</td></tr>
<tr>
<td>skip_name_resolve</td>
<td>ON</td>
<td>OFF</td></tr>
<tr>
<td>pseudo_thread_id</td>
<td>3</td>
<td>2</td></tr>
<tr>
<td>character_sets_dir</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/sql/share/charsets/</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/sql/share/charsets/</td></tr>
<tr>
<td>innodb_adaptive_flushing_lwm</td>
<td>10</td>
<td>10</td></tr>
<tr>
<td>myisam_recover_options</td>
<td>DEFAULT</td>
<td>OFF</td></tr>
<tr>
<td>performance_schema_max_statement_classes</td>
<td>179</td>
<td>168</td></tr>
<tr>
<td>innodb_version</td>
<td>5.6.26-74.0</td>
<td>5.6.31</td></tr>
<tr>
<td>max_write_lock_count</td>
<td>4294967295</td>
<td>18446744073709500000</td></tr>
<tr>
<td>thread_cache_size</td>
<td>0</td>
<td>9</td></tr>
<tr>
<td>innodb_checksum_algorithm</td>
<td>INNODB</td>
<td>innodb</td></tr>
<tr>
<td>optimizer_switch</td>
<td>
index_merge=on,<br>index_merge_union=on,<br>index_merge_sort_union=on,<br>index_merge_intersection=on,<br>index_merge_sort_intersection=off,<br>engine_condition_pushdown=off,<br>index_condition_pushdown=on,<br>derived_merge=on,<br>derived_with_keys=on,<br>firstmatch=on,<br>loosescan=on,<br>materialization=on,<br>in_to_exists=on,<br>semijoin=on,<br>partial_match_rowid_merge=on,<br>partial_match_table_scan=on,<br>subquery_cache=on,<br>mrr=off,<br>mrr_cost_based=off,<br>mrr_sort_keys=off,<br>outer_join_with_cache=on,<br>semijoin_with_cache=on,<br>join_cache_incremental=on,<br>join_cache_hashed=on,<br>join_cache_bka=on,<br>optimize_join_buffer_size=off,<br>table_elimination=on,<br>extended_keys=on,<br>exists_to_in=on</td>
<td>
index_merge=on,<br>index_merge_union=on,<br>index_merge_sort_union=on,<br>index_merge_intersection=on,<br>engine_condition_pushdown=on,<br>index_condition_pushdown=on,<br>mrr=on,<br>mrr_cost_based=on,<br>block_nested_loop=on,<br>batched_key_access=off,<br>materialization=on,<br>semijoin=on,<br>loosescan=on,<br>firstmatch=on,<br>subquery_materialization_cost_based=on,<br>use_index_extensions=on
</td></tr>
<tr>
<td>timestamp</td>
<td>1471938276</td>
<td>1471937901</td></tr>
<tr>
<td>general_log_file</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/mysql-test/var/mysqld.1/mysqld.log</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/mysqld.1/mysqld.log</td></tr>
<tr>
<td>myisam_stats_method</td>
<td>NULLS_UNEQUAL</td>
<td>nulls_unequal</td></tr>
<tr>
<td>innodb_log_compressed_pages</td>
<td>OFF</td>
<td>ON</td></tr>
<tr>
<td>query_prealloc_size</td>
<td>24576</td>
<td>0</td></tr>
<tr>
<td>rand_seed2</td>
<td>297895171</td>
<td>0</td></tr>
<tr>
<td>rand_seed1</td>
<td>605568929</td>
<td>0</td></tr>
<tr>
<td>socket</td>
<td>/tmp/5cXm2hHsWi/mysqld.1.sock</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/mysql-test/var/tmp/mysqld.1.sock</td></tr>
<tr>
<td>innodb_max_dirty_pages_pct_lwm</td>
<td>0.001</td>
<td>0</td></tr>
<tr>
<td>lc_messages_dir</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/sql/share/</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/build_dongzhi/sql/share/</td></tr>
<tr>
<td>max_relay_log_size</td>
<td>1073741824</td>
<td>0</td></tr>
<tr>
<td>plugin_dir</td>
<td>/data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/lib/plugin/</td>
<td>/data/home/tdengine/dongzhi/src/mysql-server-5.6/lib/plugin/</td></tr>
<tr>
<td>thread_stack</td>
<td>294912</td>
<td>262144</td></tr>
</table>
- aria_block_size 8192
- aria_checkpoint_interval 30
- aria_checkpoint_log_activity 1048576
- aria_encrypt_tables OFF
- aria_force_start_after_recovery_failures 0
- aria_group_commit none
- aria_group_commit_interval 0
- aria_log_file_size 1073741824
- aria_log_purge_type immediate
- aria_max_sort_file_size 9223372036853727232
- aria_page_checksum ON
- aria_pagecache_age_threshold 300
- aria_pagecache_buffer_size 134217728
- aria_pagecache_division_limit 100
- aria_pagecache_file_hash_size 512
- aria_recover NORMAL
- aria_repair_threads 1
- aria_sort_buffer_size 268434432
- aria_stats_method nulls_unequal
- aria_sync_log_dir NEWFILE
- aria_used_for_temp_tables ON
- autoremoverelaylog ON
- binlog_annotate_row_events OFF
- binlog_commit_wait_count 0
- binlog_commit_wait_usec 100000
- binlog_optimize_thread_scheduling ON
- deadlock_search_depth_long 15
- deadlock_search_depth_short 4
- deadlock_timeout_long 50000000
- deadlock_timeout_short 10000
- debug_no_thread_alarm OFF
- default_master_connection
- default_regex_flags
- encrypt_binlog OFF
- encrypt_tmp_disk_tables OFF
- encrypt_tmp_files OFF
- enforce_storage_engine
- expensive_subquery_limit 100
- extra_max_connections 20
- extra_port 0
- flush_relay_logs_for_strong_consistency ON
- gtid_binlog_pos
- gtid_binlog_state
- gtid_current_pos
- gtid_domain_id 0
- gtid_ignore_duplicates OFF
- gtid_seq_no 0
- gtid_slave_pos
- gtid_strict_mode OFF
- histogram_size 0
- histogram_type SINGLE_PREC_HB
- in_transaction 0
- innodb_adaptive_hash_index_partitions 1
- innodb_background_scrub_data_check_interval 3600
- innodb_background_scrub_data_compressed OFF
- innodb_background_scrub_data_interval 604800
- innodb_background_scrub_data_uncompressed OFF
- innodb_buf_dump_status_frequency 0
- innodb_buffer_pool_populate OFF
- innodb_cleaner_lsn_age_factor HIGH_CHECKPOINT
- innodb_compression_algorithm none
- innodb_corrupt_table_action assert
- innodb_default_encryption_key_id 1
- innodb_defragment OFF
- innodb_defragment_fill_factor 0.900000
- innodb_defragment_fill_factor_n_recs 20
- innodb_defragment_frequency 40
- innodb_defragment_n_pages 7
- innodb_defragment_stats_accuracy 0
- innodb_disallow_writes OFF
- innodb_empty_free_list_algorithm BACKOFF
- innodb_encrypt_log OFF
- innodb_encrypt_tables OFF
- innodb_encryption_rotate_key_age 1
- innodb_encryption_rotation_iops 100
- innodb_encryption_threads 0
- innodb_fake_changes OFF
- innodb_fatal_semaphore_wait_threshold 600
- innodb_force_primary_key OFF
- innodb_foreground_preflush EXPONENTIAL_BACKOFF
- innodb_idle_flush_pct 100
- innodb_immediate_scrub_data_uncompressed OFF
- innodb_instrument_semaphores OFF
- innodb_kill_idle_transaction 0
- innodb_locking_fake_changes ON
- innodb_log_arch_dir ./
- innodb_log_arch_expire_sec 0
- innodb_log_archive OFF
- innodb_log_block_size 512
- innodb_log_checksum_algorithm INNODB
- innodb_max_bitmap_file_size 104857600
- innodb_max_changed_pages 1000000
- innodb_mtflush_threads 8
- innodb_prefix_index_cluster_optimization OFF
- innodb_sched_priority_cleaner 19
- innodb_scrub_log OFF
- innodb_scrub_log_speed 256
- innodb_show_locks_held 10
- innodb_show_verbose_locks 0
- innodb_simulate_comp_failures 0
- innodb_stats_modified_counter 0
- innodb_stats_traditional ON
- innodb_track_changed_pages OFF
- innodb_use_atomic_writes OFF
- innodb_use_fallocate OFF
- innodb_use_global_flush_log_at_trx_commit ON
- innodb_use_mtflush OFF
- innodb_use_stacktrace OFF
- innodb_use_trim OFF
- join_buffer_space_limit 2097152
- join_cache_level 2
- key_cache_file_hash_size 512
- key_cache_segments 0
- last_gtid
- log_slow_filter admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk
- log_slow_rate_limit 1
- log_slow_verbosity
- log_tc_size 24576
- loglevel 3
- max_long_data_size 4194304
- max_statement_time 0.000000
- mrr_buffer_size 262144
- myisam_block_size 1024
- mysql56_temporal_format ON
- old_mode
- optimizer_selectivity_sampling_limit 100
- optimizer_use_condition_selectivity 1
- plugin_maturity unknown
- progress_report_time 5
- query_cache_strip_comments OFF
- relay_log_sync_threshold 134217728
- relay_log_sync_timeout 200
- relay_log_sync_txn_count 5
- replicate_annotate_row_events OFF
- replicate_do_db
- replicate_do_table
- replicate_events_marked_for_skip REPLICATE
- replicate_ignore_db
- replicate_ignore_table
- replicate_wild_do_table
- replicate_wild_ignore_table
- rowid_merge_buff_size 8388608
- rpl_semi_sync_master_enabled OFF
- rpl_semi_sync_master_timeout 10000
- rpl_semi_sync_master_trace_level 32
- rpl_semi_sync_master_wait_no_slave ON
- rpl_semi_sync_master_wait_point AFTER_COMMIT
- rpl_semi_sync_slave_enabled OFF
- rpl_semi_sync_slave_trace_level 32
- skip_parallel_replication OFF
- skip_replication OFF
- slave_current_parallel_transactions 0
- slave_ddl_exec_mode IDEMPOTENT
- slave_domain_parallel_threads 0
- slave_max_parallel_transactions 0
- slave_parallel_max_queued 131072
- slave_parallel_mode conservative
- slave_parallel_threads 0
- slave_run_triggers_for_rbr NO
- sqlasyn OFF
- sqlasyntimeout 10
- sqlasynwarntimeout 3
- strict_password_validation ON
- thread_pool_high_prio_mode transactions
- thread_pool_high_prio_tickets 4294967295
- thread_pool_idle_timeout 60
- thread_pool_max_threads 1000
- thread_pool_oversubscribe 3
- thread_pool_oversubscribe_parall 1
- thread_pool_size 8
- thread_pool_stall_limit 500
- use_stat_tables NEVER
- userstat OFF
- version_malloc_library system
- version_ssl_library OpenSSL 1.0.2d 9 Jul 2015
- wsrep_auto_increment_control ON
- wsrep_causal_reads OFF
- wsrep_certify_nonpk ON
- wsrep_cluster_address
- wsrep_cluster_name my_wsrep_cluster
- wsrep_convert_lock_to_trx OFF
- wsrep_data_home_dir /data/home/tdengine/dongzhi/src/tdsql-mariadb-10.1.9-release1/build_dongzhi/mysql-test/var/mysqld.1/data/
- wsrep_dbug_option
- wsrep_debug OFF
- wsrep_desync OFF
- wsrep_dirty_reads OFF
- wsrep_drupal_282555_workaround OFF
- wsrep_forced_binlog_format NONE
- wsrep_gtid_domain_id 0
- wsrep_gtid_mode OFF
- wsrep_load_data_splitting ON
- wsrep_log_conflicts OFF
- wsrep_max_ws_rows 131072
- wsrep_max_ws_size 1073741824
- wsrep_mysql_replication_bundle 0
- wsrep_node_address
- wsrep_node_incoming_address AUTO
- wsrep_node_name
- wsrep_notify_cmd
- wsrep_on OFF
- wsrep_osu_method TOI
- wsrep_patch_version wsrep_25.11
- wsrep_provider none
- wsrep_provider_options
- wsrep_recover OFF
- wsrep_replicate_myisam OFF
- wsrep_restart_slave OFF
- wsrep_retry_autocommit 1
- wsrep_slave_fk_checks ON
- wsrep_slave_threads 1
- wsrep_slave_uk_checks OFF
- wsrep_sst_auth
- wsrep_sst_donor
- wsrep_sst_donor_rejects_queries OFF
- wsrep_sst_method rsync
- wsrep_sst_receive_address AUTO
- wsrep_start_position 00000000-0000-0000-0000-000000000000:-1
- wsrep_sync_wait 0
- avoid_temporal_upgrade OFF
- bind_address *
- binlog_error_action IGNORE_ERROR
- binlog_gtid_simple_recovery OFF
- binlog_max_flush_queue_time 0
- binlog_order_commits ON
- binlog_rows_query_log_events OFF
- binlogging_impossible_mode IGNORE_ERROR
- block_encryption_mode aes-128-ecb
- core_file ON
- disconnect_on_expired_password ON
- end_markers_in_json OFF
- enforce_gtid_consistency OFF
- eq_range_index_dive_limit 1
- gtid_executed
- gtid_mode OFF
- gtid_next AUTOMATIC
- gtid_owned
- gtid_purged
- innodb_tmpdir
- log_bin_use_v1_row_events OFF
- log_slow_admin_statements OFF
- log_slow_slave_statements OFF
- log_throttle_queries_not_using_indexes 0
- master_info_repository FILE
- new OFF
- optimizer_trace enabled=off,one_line=off
- optimizer_trace_features greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on
- optimizer_trace_limit 1
- optimizer_trace_max_mem_size 16384
- optimizer_trace_offset -1
- relay_log_info_repository FILE
- rpl_stop_slave_timeout 31536000
- server_id_bits 32
- server_uuid 9078a55d-6904-11e6-bfa9-ecf4bbcdc829
- sha256_password_private_key_path private_key.pem
- sha256_password_public_key_path public_key.pem
- show_old_temporals OFF
- simplified_binlog_gtid_recovery OFF
- slave_allow_batching OFF
- slave_checkpoint_group 512
- slave_checkpoint_period 300
- slave_parallel_workers 0
- slave_pending_jobs_size_max 16777216
- slave_rows_search_algorithms TABLE_SCAN,INDEX_SCAN
- table_open_cache_instances 1
- transaction_allow_batching OFF
本页内容是否解决了您的问题?