MySQL 5.6.14 Source Code Document
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check_key_reads.inc
1 # include file for checking if variable key_reads is zero
2 let $key_reads= query_get_value(SHOW STATUS LIKE 'key_reads',Value,1);
3 --disable_query_log
4 eval SELECT IF($key_reads = 0, "Yes!", "No!") as 'Zero key reads?';
5 FLUSH STATUS;
6 --enable_query_log