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# # Bug #21286261: QUERY DIGEST DOES NOT REFLECT NEW OPTIMIZER HINTS # CREATE TABLE t1(i INT); CREATE TABLE t2(i INT); # Digests should be same (empty hint comment): SELECT * FROM t1; SELECT /*+ */ * FROM t1; SELECT digest, digest_text FROM performance_schema.events_statements_history ORDER BY timer_start DESC LIMIT 2; digest digest_text 23a2bd5d5f00f61920a837cbec0340c8 SELECT * FROM `t1` 23a2bd5d5f00f61920a837cbec0340c8 SELECT * FROM `t1` # Digests should be different: SELECT * FROM t1, t2; SELECT /*+ BKA(t1@qb1) BNL(@qb1 t1) DUPSWEEDOUT FIRSTMATCH INTOEXISTS LOOSESCAN MATERIALIZATION MRR(t1) NO_BKA(t2) NO_BNL(t2) NO_ICP(t2) NO_MRR(t2) NO_RANGE_OPTIMIZATION(t2) NO_SEMIJOIN(t2) QB_NAME(qb1) SEMIJOIN(t1) SUBQUERY(t1) */ * FROM t1, t2; SELECT digest, digest_text FROM performance_schema.events_statements_history ORDER BY timer_start DESC LIMIT 2; digest digest_text b5dcadc964d9c74aeaafbc7422843058 SELECT /*+ BKA ( `t1`@`qb1` ) BNL ( @`qb1` `t1` ) DUPSWEEDOUT FIRSTMATCH INTOEXISTS LOOSESCAN MATERIALIZATION MRR ( `t1` ) NO_BKA ( `t2` ) NO_BNL ( `t2` ) NO_ICP ( `t2` ) NO_MRR ( `t2` ) NO_RANGE_OPTIMIZATION ( `t2` ) NO_SEMIJOIN ( `t2` ) QB_NAME ( `qb1` ) SEMIJOIN ( `t1` ) SUBQUERY ( `t1` ) */ * FROM `t1` , `t2` b52b5a0d94d733e8e605cd1152080d8a SELECT * FROM `t1` , `t2` SELECT * FROM t2, t1; SELECT /*+ MAX_EXECUTION_TIME(10) */ * FROM t2, t1; SELECT digest, digest_text FROM performance_schema.events_statements_history ORDER BY timer_start DESC LIMIT 2; digest digest_text def05dbaf5e5ab9af48b70c27c603de2 SELECT /*+ MAX_EXECUTION_TIME (?) */ * FROM `t2` , `t1` 1613448fc70feba2d3302a92ea1cc139 SELECT * FROM `t2` , `t1` SELECT 1; SELECT /*+ bad_hint_also_goes_to_digest */ 1; SELECT digest, digest_text FROM performance_schema.events_statements_history ORDER BY timer_start DESC LIMIT 2; digest digest_text 7936911d8f35e950c5c3bbc98eee3c4f SELECT /*+ `bad_hint_also_goes_to_digest` */ ? 3d4fc22e33e10d7235eced3c75a84c2c SELECT ? DROP TABLE t1, t2; #