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6e484c3bd9
ANALYZE FORMAT=JSON output now includes table.r_engine_stats which has the engine statistics. Only non-zero members are printed. Internally: EXPLAIN data structures Explain_table_acccess and Explain_update now have handler* handler_for_stats pointer. It is used to read statistics from handler_for_stats->handler_stats. The following applies only to 10.9+, backport doesn't use it: Explain data structures exist after the tables are closed. We avoid walking invalid pointers using this: - SQL layer calls Explain_query::notify_tables_are_closed() before closing tables. - After that call, printing of JSON output is disabled. Non-JSON output can be printed but we don't access handler_for_stats when doing that.
65 lines
1.8 KiB
Plaintext
65 lines
1.8 KiB
Plaintext
#
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# Tests for r_engine_stats in ANALYZE FORMAT=JSON output
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#
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--source include/analyze-format.inc
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--source include/have_sequence.inc
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--source include/have_innodb.inc
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create table t1 (
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pk int not null,
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a varchar(64),
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b varchar(64),
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c varchar(64)
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) engine=innodb;
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insert into t1 select
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seq, seq, seq, seq
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from
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seq_1_to_10000;
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analyze table t1 persistent for all;
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--echo # Note the r_engine_stats below. Only non-zero members are printed
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let $out=`
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ANALYZE FORMAT=json
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select * from t1 where pk < 120000;
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`;
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# Don't use "source include/analyze-format.inc" as it replaces r_engine_stats
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# Replace the "pages_accessed" value, too, as it is different for some
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# platforms...
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--replace_regex /("(r_[a-z_]*_time(_in_progress)?_ms|r_buffer_size|pages_accessed)": )[^, \n]*/\1"REPLACED"/
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evalp select '$out' as X;
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evalp set @js='$out';
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set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
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select cast(json_extract(@out,'$[0]') as DOUBLE) > 0 as PAGES_ACCESSED_MORE_THAN_ZERO;
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--echo #
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--echo # Try an UPDATE
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--echo #
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let $out=`analyze format=json update t1 set b = b-1 where pk < 120000`;
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--replace_regex /("(r_[a-z_]*_time_ms|pages_accessed|pages_updated)": )[^, \n]*/\1"REPLACED"/
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evalp select '$out' as X;
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evalp set @js='$out';
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set @out=(select json_extract(@js,'$**.r_engine_stats.pages_updated'));
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select cast(json_extract(@out,'$[0]') as DOUBLE) > 0 as PAGES_UPDATED_MORE_THAN_ZERO;
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--echo #
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--echo # Try a DELETE
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--echo #
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let $out=`analyze format=json delete from t1 where mod(pk,2)=1`;
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--replace_regex /("(r_[a-z_]*_time_ms|pages_accessed|pages_updated)": )[^, \n]*/\1"REPLACED"/
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evalp select '$out' as X;
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evalp set @js='$out';
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set @out=(select json_extract(@js,'$**.r_engine_stats.pages_updated'));
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select cast(json_extract(@out,'$[0]') as DOUBLE) > 0 as PAGES_UPDATED_MORE_THAN_ZERO;
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drop table t1;
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