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Race condition. field->flags were copied from s->field->flags during field->clone(), early in open_table_from_share(). But s->field->flags were getting their PART_INDIRECT_KEY_FLAG bit much later in TABLE::mark_columns_used_by_virtual_fields() and only once per share. If two threads were executing the code between field->clone() and mark_columns_used_by_virtual_fields() at the same time, only one would get PART_INDIRECT_KEY_FLAG bits in field[].
22 lines
793 B
Text
22 lines
793 B
Text
#
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# MDEV-17349 Assertion `!table || (!table->read_set || bitmap_is_set(table->read_set, field_index))' failed on concurrent SELECT and DELETE after RENAME from table with index on virtual column
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#
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source include/have_innodb.inc;
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source include/have_debug_sync.inc;
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create table t1 (f text, vf tinytext as (f), key (vf(64))) engine=innodb;
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insert t1 (f) values ('foo');
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flush tables;
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connect con1,localhost,root,,test;
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set debug_sync='TABLE_after_field_clone WAIT_FOR go';
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send delete from t1;
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connection default;
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let $wait_condition= select state like 'debug sync point%' from information_schema.processlist;
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source include/wait_condition.inc;
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select * from t1;
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set debug_sync='now SIGNAL go';
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connection con1;
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reap;
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disconnect con1;
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connection default;
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drop table t1;
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set debug_sync='reset';
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