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MDEV-23645: Optimizer trace: print conditions after substitute_for_best_equal_field

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Print the conditions for WHERE, HAVING, and ON.
This commit is contained in:
Sergei Petrunia
2021-03-19 17:32:08 +03:00
parent 00528a0445
commit b9a45ba40f
8 changed files with 301 additions and 35 deletions
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15
sql/sql_select.cc
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@@ -2408,6 +2408,10 @@ int JOIN::optimize_stage2()
DBUG_RETURN(1);
}
conds->update_used_tables();
if (unlikely(thd->trace_started()))
trace_condition(thd, "WHERE", "substitute_best_equal", conds);
DBUG_EXECUTE("where",
print_where(conds,
"after substitute_best_equal",
@@ -2424,7 +2428,12 @@ int JOIN::optimize_stage2()
DBUG_RETURN(1);
}
if (having)
{
having->update_used_tables();
if (unlikely(thd->trace_started()))
trace_condition(thd, "HAVING", "substitute_best_equal", having);
}
DBUG_EXECUTE("having",
print_where(having,
"after substitute_best_equal",
@@ -2451,6 +2460,11 @@ int JOIN::optimize_stage2()
DBUG_RETURN(1);
}
(*tab->on_expr_ref)->update_used_tables();
if (unlikely(thd->trace_started()))
{
trace_condition(thd, "ON expr", "substitute_best_equal",
(*tab->on_expr_ref), tab->table->alias.c_ptr());
}
}
}
@@ -11479,7 +11493,6 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
*/
Json_writer_object trace_wrapper(thd);
Json_writer_object trace_conditions(thd, "attaching_conditions_to_tables");
trace_conditions.add("original_condition", cond);
Json_writer_array trace_attached_comp(thd,
"attached_conditions_computation");
uint i;