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Use default character set for expressions

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- Force usage of () around complex DEFAULT expressions
- Give error if DEFAULT expression contains invalid characters
- Don't use const_charset_conversion for stored Item_func_sysconf expressions
  as the result is not constaint over different executions
- Fixed Item_func_user() to not store calculated value in str_value
This commit is contained in:
Michael Widenius
2016-06-24 23:42:35 +02:00
committed by Sergei Golubchik
parent 8f226121e5
commit fb67cde237
21 changed files with 508 additions and 268 deletions
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2
sql/sql_class.h
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@ -2840,7 +2840,7 @@ public:
bool query_start_sec_part_used;
/* for IS NULL => = last_insert_id() fix in remove_eq_conds() */
bool substitute_null_with_insert_id;
bool in_lock_tables;
bool in_lock_tables, in_stored_expression;
bool bootstrap, cleanup_done, free_connection_done;
/** is set if some thread specific value(s) used in a statement. */