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MDEV-15347: Valgrind or ASAN errors in mysql_make_view on query from information_schema

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Make each lex pointing to statement lex instead of global pointer in THD (no
need store and restore the global pointer and put it on SP stack).
This commit is contained in:
Oleksandr Byelkin
2018-05-07 17:42:55 +02:00
parent 3b99a274a8
commit 0bd2b80254
11 changed files with 60 additions and 34 deletions
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15
sql/sql_class.h
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@@ -1027,21 +1027,6 @@ public:
LEX_STRING name; /* name for named prepared statements */
LEX *lex; // parse tree descriptor
/*
LEX which represents current statement (conventional, SP or PS)
For example during view parsing THD::lex will point to the views LEX and
THD::stmt_lex will point to LEX of the statement where the view will be
included
Currently it is used to have always correct select numbering inside
statement (LEX::current_select_number) without storing and restoring a
global counter which was THD::select_number.
TODO: make some unified statement representation (now SP has different)
to store such data like LEX::current_select_number.
*/
LEX *stmt_lex;
/*
Points to the query associated with this statement. It's const, but
we need to declare it char * because all table handlers are written