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avoid unintentional %union size increases

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Sergei Golubchik 2019-01-10 13:51:28 +01:00
parent 103a32fdd3
commit 9b3f177c6d
1 changed files with 2 additions and 0 deletions
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2
sql/sql_yacc.yy
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@ -788,6 +788,8 @@ Virtual_column_info *add_virtual_expression(THD *thd, Item *expr)
}
%{
/* avoid unintentional %union size increases, it's what a parser stack made of */
static_assert(sizeof(YYSTYPE) == sizeof(void*)*2+8, "%union size check");
bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
%}