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fixed using 'uncachable' tag and RAND_TABLE_BIT setting

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sql/item_create.cc:
  specify cause of uncachability
sql/item_func.cc:
  specify cause of uncachability
sql/item_subselect.cc:
  fixed setting RAND_TABLE_BIT
  specify cause of uncachability
sql/item_subselect.h:
  used one field for all uncachability causes
sql/mysql_priv.h:
  causes of uncachability
sql/sql_lex.cc:
  specify cause of uncachability
sql/sql_lex.h:
  used one field for all uncachability causes
sql/sql_select.cc:
  used one field for all uncachability causes
sql/sql_union.cc:
  used one field for all uncachability causes
sql/sql_yacc.yy:
  specify cause of uncachability
This commit is contained in:
unknown
2003-11-17 20:53:40 +02:00
parent 8fed6653de
commit 79533975b1
10 changed files with 62 additions and 60 deletions
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15
sql/sql_lex.h
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@ -84,6 +84,7 @@ enum enum_sql_command {
#define DESCRIBE_NORMAL 1
#define DESCRIBE_EXTENDED 2
typedef List<Item> List_item;
typedef struct st_lex_master_info
@ -226,9 +227,14 @@ public:
};
ulong options;
/*
result of this query can't be cached, bit field, can be :
UNCACHEABLE_DEPENDENT
UNCACHEABLE_RAND
UNCACHEABLE_UNCACHEABLE
*/
uint8 uncacheable;
enum sub_select_type linkage;
bool dependent; /* dependent from outer select subselect */
bool uncacheable; /* result of this query can't be cached */
bool no_table_names_allowed; /* used for global order by */
bool no_error; /* suppress error message (convert it to warnings) */
@ -565,7 +571,7 @@ typedef struct st_lex
bool derived_tables;
bool safe_to_cache_query;
st_lex() {}
inline void uncacheable()
inline void uncacheable(uint8 cause)
{
safe_to_cache_query= 0;
@ -580,7 +586,8 @@ typedef struct st_lex
un != &unit;
sl= sl->outer_select(), un= sl->master_unit())
{
sl->uncacheable = un->uncacheable= 1;
sl->uncacheable|= cause;
un->uncacheable|= cause;
}
}
} LEX;