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MWL#182: Explain running statements

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- Get subqueries to work, part #1.
This commit is contained in:
Sergey Petrunya
2011-10-28 02:30:02 +04:00
parent 286a751490
commit ca020dfa9e
4 changed files with 155 additions and 3 deletions
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11
sql/sql_select.cc
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@ -265,7 +265,9 @@ void dbug_serve_apcs(THD *thd, int n_calls)
/*
Usage
Debugging: check if @name=value, comparing as integer
Intended usage:
DBUG_EXECUTE_IF("show_explain_probe_2",
if (dbug_user_var_equals_int(thd, "select_id", select_id))
@ -2102,7 +2104,6 @@ void JOIN::exec_inner()
int tmp_error;
DBUG_ENTER("JOIN::exec");
DBUG_EXECUTE_IF("show_explain_probe_2", dbug_serve_apcs(thd, 1););
DBUG_EXECUTE_IF("show_explain_probe_1",
if (dbug_user_var_equals_int(thd,
"show_explain_probe_select_id",
@ -20516,6 +20517,7 @@ void JOIN::clear()
}
}
int print_fake_select_lex_join(select_result_sink *result, bool on_the_fly,
SELECT_LEX *select_lex, uint8 select_options)
{
@ -20594,6 +20596,7 @@ int print_fake_select_lex_join(select_result_sink *result, bool on_the_fly,
return 0;
}
/**
EXPLAIN handling.
@ -21162,6 +21165,10 @@ int JOIN::print_explain(select_result_sink *result, bool on_the_fly,
}
/*
See st_select_lex::print_explain() for the SHOW EXPLAIN counterpart
*/
static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
bool distinct,const char *message)
{