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430d60d1fc
The problem happened because the the new client capability flag CLIENT_EXTENDED_METADATA was not put into the cache entry key. So results cached by a new client were sent to the old client (and vica versa) with a mis-matching metadata, which made the client abort the connection on an unexpected result set metadata packet format. The problem was caused by the patch for: MDEV-17832 Protocol: extensions for Pluggable types and JSON, GEOMETRY which forgot to adjust the query cache code. Fix: - Adding a new member Query_cache_query_flags::client_extended_metadata, so only clients with equal CLIENT_EXTENDED_METADATA flag values can reuse results. - Adding a new column CLIENT_EXTENDED_METADATA into INFORMATION_SCHEMA.QUERY_CACHE_INFO (privided by the qc_info plugin).
35 lines
1.8 KiB
PHP
35 lines
1.8 KiB
PHP
if (`select count(*) = 0 from information_schema.plugins where plugin_name = 'query_cache_info' and plugin_status='active'`)
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{
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--skip QUERY_CACHE_INFO plugin is not active
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}
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set global query_cache_type=ON;
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set local query_cache_type=ON;
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set global query_cache_size=1355776;
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create table t1 (a int not null);
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insert into t1 values (1),(2),(3);
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select * from t1;
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select statement_schema, statement_text, result_blocks_count, result_blocks_size from information_schema.query_cache_info;
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select @@time_zone into @time_zone;
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select @@default_week_format into @default_week_format;
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select @@character_set_client into @character_set_client;
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select @@character_set_results into @character_set_results;
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select @@sql_mode into @sql_mode;
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select @@div_precision_increment into @div_precision_increment;
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select @@lc_time_names into @lc_time_names;
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select @@max_sort_length into @max_sort_length;
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select @@autocommit into @autocommit;
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select @@group_concat_max_len into @group_concat_max_len;
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select Name into @new_time_zone from mysql.time_zone_name limit 1;
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set time_zone=@new_time_zone,default_week_format=4,character_set_client='binary',character_set_results='utf32',collation_connection='utf32_bin',sql_mode='STRICT_ALL_TABLES',div_precision_increment=7,lc_time_names='ar_SD',autocommit=0, group_concat_max_len=513, max_sort_length=1011;
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--disable_result_log
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select * from t1;
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--enable_result_log
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set time_zone= @time_zone, default_week_format= @default_week_format, character_set_client= @character_set_client,character_set_results= @character_set_results, sql_mode= @sql_mode, div_precision_increment= @div_precision_increment, lc_time_names= @lc_time_names, autocommit= @autocommit, group_concat_max_len= @group_concat_max_len, max_sort_length= @max_sort_length;
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--sorted_result
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--replace_column 5 # 20 # 24 #
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select * from information_schema.query_cache_info;
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