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Commit 7bf8a9e6 authored by unknown's avatar unknown
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Merge bk-internal.mysql.com:/home/bk/mysql-5.0 

into  mysql.com:/opt/local/work/mysql-5.0-merge
parents 0d9edb36 58d4830c
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Showing with 78 additions and 50 deletions
include/hash.h
View file @ 7bf8a9e6
......@@ -33,7 +33,7 @@ typedef void (*hash_free_key)(void *);
typedef struct st_hash {
uint key_offset,key_length; /* Length of key if const length */
uint records,blength,current_record;
uint records, blength;
uint flags;
DYNAMIC_ARRAY array; /* Place for hash_keys */
hash_get_key get_key;
......@@ -41,6 +41,9 @@ typedef struct st_hash {
CHARSET_INFO *charset;
} HASH;
/* A search iterator state */
typedef uint HASH_SEARCH_STATE;
#define hash_init(A,B,C,D,E,F,G,H) _hash_init(A,B,C,D,E,F,G, H CALLER_INFO)
my_bool _hash_init(HASH *hash, CHARSET_INFO *charset,
uint default_array_elements, uint key_offset,
......@@ -49,12 +52,15 @@ my_bool _hash_init(HASH *hash, CHARSET_INFO *charset,
void hash_free(HASH *tree);
void my_hash_reset(HASH *hash);
byte *hash_element(HASH *hash,uint idx);
gptr hash_search(HASH *info,const byte *key,uint length);
gptr hash_next(HASH *info,const byte *key,uint length);
gptr hash_search(const HASH *info, const byte *key, uint length);
gptr hash_first(const HASH *info, const byte *key, uint length,
HASH_SEARCH_STATE *state);
gptr hash_next(const HASH *info, const byte *key, uint length,
HASH_SEARCH_STATE *state);
my_bool my_hash_insert(HASH *info,const byte *data);
my_bool hash_delete(HASH *hash,byte *record);
my_bool hash_update(HASH *hash,byte *record,byte *old_key,uint old_key_length);
void hash_replace(HASH *hash, uint idx, byte *new_row);
void hash_replace(HASH *hash, HASH_SEARCH_STATE *state, byte *new_row);
my_bool hash_check(HASH *hash); /* Only in debug library */
#define hash_clear(H) bzero((char*) (H),sizeof(*(H)))
......
mysys/hash.c
View file @ 7bf8a9e6
......@@ -36,9 +36,10 @@ typedef struct st_hash_info {
static uint hash_mask(uint hashnr,uint buffmax,uint maxlength);
static void movelink(HASH_LINK *array,uint pos,uint next_link,uint newlink);
static int hashcmp(HASH *hash,HASH_LINK *pos,const byte *key,uint length);
static int hashcmp(const HASH *hash, HASH_LINK *pos, const byte *key,
uint length);
static uint calc_hash(HASH *hash,const byte *key,uint length)
static uint calc_hash(const HASH *hash, const byte *key, uint length)
{
ulong nr1=1, nr2=4;
hash->charset->coll->hash_sort(hash->charset,(uchar*) key,length,&nr1,&nr2);
......@@ -63,7 +64,6 @@ _hash_init(HASH *hash,CHARSET_INFO *charset,
hash->key_offset=key_offset;
hash->key_length=key_length;
hash->blength=1;
hash->current_record= NO_RECORD; /* For the future */
hash->get_key=get_key;
hash->free=free_element;
hash->flags=flags;
......@@ -135,7 +135,6 @@ void my_hash_reset(HASH *hash)
reset_dynamic(&hash->array);
/* Set row pointers so that the hash can be reused at once */
hash->blength= 1;
hash->current_record= NO_RECORD;
DBUG_VOID_RETURN;
}
......@@ -147,7 +146,8 @@ void my_hash_reset(HASH *hash)
*/
static inline char*
hash_key(HASH *hash,const byte *record,uint *length,my_bool first)
hash_key(const HASH *hash, const byte *record, uint *length,
my_bool first)
{
if (hash->get_key)
return (*hash->get_key)(record,length,first);
......@@ -163,8 +163,8 @@ static uint hash_mask(uint hashnr,uint buffmax,uint maxlength)
return (hashnr & ((buffmax >> 1) -1));
}
static uint hash_rec_mask(HASH *hash,HASH_LINK *pos,uint buffmax,
uint maxlength)
static uint hash_rec_mask(const HASH *hash, HASH_LINK *pos,
uint buffmax, uint maxlength)
{
uint length;
byte *key= (byte*) hash_key(hash,pos->data,&length,0);
......@@ -186,14 +186,25 @@ unsigned int rec_hashnr(HASH *hash,const byte *record)
}
/* Search after a record based on a key */
/* Sets info->current_ptr to found record */
gptr hash_search(const HASH *hash, const byte *key, uint length)
{
HASH_SEARCH_STATE state;
return hash_first(hash, key, length, &state);
}
/*
Search after a record based on a key
NOTE
Assigns the number of the found record to HASH_SEARCH_STATE state
*/
gptr hash_search(HASH *hash,const byte *key,uint length)
gptr hash_first(const HASH *hash, const byte *key, uint length,
HASH_SEARCH_STATE *current_record)
{
HASH_LINK *pos;
uint flag,idx;
DBUG_ENTER("hash_search");
DBUG_ENTER("hash_first");
flag=1;
if (hash->records)
......@@ -206,7 +217,7 @@ gptr hash_search(HASH *hash,const byte *key,uint length)
if (!hashcmp(hash,pos,key,length))
{
DBUG_PRINT("exit",("found key at %d",idx));
hash->current_record= idx;
*current_record= idx;
DBUG_RETURN (pos->data);
}
if (flag)
......@@ -218,31 +229,32 @@ gptr hash_search(HASH *hash,const byte *key,uint length)
}
while ((idx=pos->next) != NO_RECORD);
}
hash->current_record= NO_RECORD;
*current_record= NO_RECORD;
DBUG_RETURN(0);
}
/* Get next record with identical key */
/* Can only be called if previous calls was hash_search */
gptr hash_next(HASH *hash,const byte *key,uint length)
gptr hash_next(const HASH *hash, const byte *key, uint length,
HASH_SEARCH_STATE *current_record)
{
HASH_LINK *pos;
uint idx;
if (hash->current_record != NO_RECORD)
if (*current_record != NO_RECORD)
{
HASH_LINK *data=dynamic_element(&hash->array,0,HASH_LINK*);
for (idx=data[hash->current_record].next; idx != NO_RECORD ; idx=pos->next)
for (idx=data[*current_record].next; idx != NO_RECORD ; idx=pos->next)
{
pos=data+idx;
if (!hashcmp(hash,pos,key,length))
{
hash->current_record= idx;
*current_record= idx;
return pos->data;
}
}
hash->current_record=NO_RECORD;
*current_record= NO_RECORD;
}
return 0;
}
......@@ -281,7 +293,8 @@ static void movelink(HASH_LINK *array,uint find,uint next_link,uint newlink)
!= 0 key of record != key
*/
static int hashcmp(HASH *hash,HASH_LINK *pos,const byte *key,uint length)
static int hashcmp(const HASH *hash, HASH_LINK *pos, const byte *key,
uint length)
{
uint rec_keylength;
byte *rec_key= (byte*) hash_key(hash,pos->data,&rec_keylength,1);
......@@ -307,7 +320,6 @@ my_bool my_hash_insert(HASH *info,const byte *record)
if (!(empty=(HASH_LINK*) alloc_dynamic(&info->array)))
return(TRUE); /* No more memory */
info->current_record= NO_RECORD;
data=dynamic_element(&info->array,0,HASH_LINK*);
halfbuff= info->blength >> 1;
......@@ -450,7 +462,6 @@ my_bool hash_delete(HASH *hash,byte *record)
}
if ( --(hash->records) < hash->blength >> 1) hash->blength>>=1;
hash->current_record= NO_RECORD;
lastpos=data+hash->records;
/* Remove link to record */
......@@ -543,7 +554,6 @@ my_bool hash_update(HASH *hash,byte *record,byte *old_key,uint old_key_length)
if ((idx=pos->next) == NO_RECORD)
DBUG_RETURN(1); /* Not found in links */
}
hash->current_record= NO_RECORD;
org_link= *pos;
empty=idx;
......@@ -593,10 +603,10 @@ byte *hash_element(HASH *hash,uint idx)
isn't changed
*/
void hash_replace(HASH *hash, uint idx, byte *new_row)
void hash_replace(HASH *hash, HASH_SEARCH_STATE *current_record, byte *new_row)
{
if (idx != NO_RECORD) /* Safety */
dynamic_element(&hash->array,idx,HASH_LINK*)->data=new_row;
if (*current_record != NO_RECORD) /* Safety */
dynamic_element(&hash->array, *current_record, HASH_LINK*)->data= new_row;
}
......
mysys/testhash.c
View file @ 7bf8a9e6
......@@ -74,7 +74,7 @@ static int do_test()
bzero((char*) key1,sizeof(key1[0])*1000);
printf("- Creating hash\n");
if (hash_init(&hash,recant/2,0,6,0,free_record,0))
if (hash_init(&hash, default_charset_info, recant/2, 0, 6, 0, free_record, 0))
goto err;
printf("- Writing records:\n");
......@@ -172,15 +172,16 @@ static int do_test()
break;
if (key1[j] > 1)
{
HASH_SEARCH_STATE state;
printf("- Testing identical read\n");
sprintf(key,"%6d",j);
pos=1;
if (!(recpos=hash_search(&hash,key,0)))
if (!(recpos= hash_first(&hash, key, 0, &state)))
{
printf("can't find key1: \"%s\"\n",key);
goto err;
}
while (hash_next(&hash,key,0) && pos < (ulong) (key1[j]+10))
while (hash_next(&hash, key, 0, &state) && pos < (ulong) (key1[j]+10))
pos++;
if (pos != (ulong) key1[j])
{
......@@ -189,7 +190,7 @@ static int do_test()
}
}
printf("- Creating output heap-file 2\n");
if (hash_init(&hash2,hash.records,0,0,hash2_key,free_record,0))
if (hash_init(&hash2, default_charset_info, hash.records, 0, 0, hash2_key, free_record,0))
goto err;
printf("- Copying and removing records\n");
......
sql/lock.cc
View file @ 7bf8a9e6
......@@ -723,6 +723,7 @@ int lock_table_name(THD *thd, TABLE_LIST *table_list)
char key[MAX_DBKEY_LENGTH];
char *db= table_list->db;
uint key_length;
HASH_SEARCH_STATE state;
DBUG_ENTER("lock_table_name");
DBUG_PRINT("enter",("db: %s name: %s", db, table_list->table_name));
......@@ -733,9 +734,9 @@ int lock_table_name(THD *thd, TABLE_LIST *table_list)
/* Only insert the table if we haven't insert it already */
for (table=(TABLE*) hash_search(&open_cache,(byte*) key,key_length) ;
for (table=(TABLE*) hash_first(&open_cache, (byte*)key, key_length, &state);
table ;
table = (TABLE*) hash_next(&open_cache,(byte*) key,key_length))
table = (TABLE*) hash_next(&open_cache, (byte*)key, key_length, &state))
if (table->in_use == thd)
DBUG_RETURN(0);
......
sql/sql_acl.cc
View file @ 7bf8a9e6
......@@ -2244,14 +2244,14 @@ static GRANT_NAME *name_hash_search(HASH *name_hash,
char helping [NAME_LEN*2+USERNAME_LENGTH+3];
uint len;
GRANT_NAME *grant_name,*found=0;
HASH_SEARCH_STATE state;
len = (uint) (strmov(strmov(strmov(helping,user)+1,db)+1,tname)-helping)+ 1;
for (grant_name=(GRANT_NAME*) hash_search(name_hash,
(byte*) helping,
len) ;
for (grant_name= (GRANT_NAME*) hash_first(name_hash, (byte*) helping,
len, &state);
grant_name ;
grant_name= (GRANT_NAME*) hash_next(name_hash,(byte*) helping,
len))
len, &state))
{
if (exact)
{
......
sql/sql_base.cc
View file @ 7bf8a9e6
......@@ -1085,6 +1085,7 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
char key[MAX_DBKEY_LENGTH];
uint key_length;
char *alias= table_list->alias;
HASH_SEARCH_STATE state;
DBUG_ENTER("open_table");
/* find a unused table in the open table cache */
......@@ -1247,9 +1248,11 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
if (thd->handler_tables)
mysql_ha_flush(thd, (TABLE_LIST*) NULL, MYSQL_HA_REOPEN_ON_USAGE, TRUE);
for (table=(TABLE*) hash_search(&open_cache,(byte*) key,key_length) ;
for (table= (TABLE*) hash_first(&open_cache, (byte*) key, key_length,
&state);
table && table->in_use ;
table = (TABLE*) hash_next(&open_cache,(byte*) key,key_length))
table= (TABLE*) hash_next(&open_cache, (byte*) key, key_length,
&state))
{
if (table->s->version != refresh_version)
{
......@@ -1621,10 +1624,12 @@ bool table_is_used(TABLE *table, bool wait_for_name_lock)
{
char *key= table->s->table_cache_key;
uint key_length= table->s->key_length;
for (TABLE *search=(TABLE*) hash_search(&open_cache,
(byte*) key,key_length) ;
HASH_SEARCH_STATE state;
for (TABLE *search= (TABLE*) hash_first(&open_cache, (byte*) key,
key_length, &state);
search ;
search = (TABLE*) hash_next(&open_cache,(byte*) key,key_length))
search= (TABLE*) hash_next(&open_cache, (byte*) key,
key_length, &state))
{
if (search->locked_by_flush ||
search->locked_by_name && wait_for_name_lock ||
......@@ -5063,11 +5068,14 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
key_length=(uint) (strmov(strmov(key,db)+1,table_name)-key)+1;
for (;;)
{
HASH_SEARCH_STATE state;
result= signalled= 0;
for (table=(TABLE*) hash_search(&open_cache,(byte*) key,key_length) ;
for (table= (TABLE*) hash_first(&open_cache, (byte*) key, key_length,
&state);
table;
table = (TABLE*) hash_next(&open_cache,(byte*) key,key_length))
table= (TABLE*) hash_next(&open_cache, (byte*) key, key_length,
&state))
{
THD *in_use;
table->s->version=0L; /* Free when thread is ready */
......
sql/sql_cache.cc
View file @ 7bf8a9e6
......@@ -3050,6 +3050,7 @@ my_bool Query_cache::move_by_type(byte **border,
}
case Query_cache_block::TABLE:
{
HASH_SEARCH_STATE record_idx;
DBUG_PRINT("qcache", ("block 0x%lx TABLE", (ulong) block));
if (*border == 0)
break;
......@@ -3067,7 +3068,7 @@ my_bool Query_cache::move_by_type(byte **border,
byte *key;
uint key_length;
key=query_cache_table_get_key((byte*) block, &key_length, 0);
hash_search(&tables, (byte*) key, key_length);
hash_first(&tables, (byte*) key, key_length, &record_idx);
block->destroy();
new_block->init(len);
......@@ -3101,7 +3102,7 @@ my_bool Query_cache::move_by_type(byte **border,
/* Fix pointer to table name */
new_block->table()->table(new_block->table()->db() + tablename_offset);
/* Fix hash to point at moved block */
hash_replace(&tables, tables.current_record, (byte*) new_block);
hash_replace(&tables, &record_idx, (byte*) new_block);
DBUG_PRINT("qcache", ("moved %lu bytes to 0x%lx, new gap at 0x%lx",
len, (ulong) new_block, (ulong) *border));
......@@ -3109,6 +3110,7 @@ my_bool Query_cache::move_by_type(byte **border,
}
case Query_cache_block::QUERY:
{
HASH_SEARCH_STATE record_idx;
DBUG_PRINT("qcache", ("block 0x%lx QUERY", (ulong) block));
if (*border == 0)
break;
......@@ -3126,7 +3128,7 @@ my_bool Query_cache::move_by_type(byte **border,
byte *key;
uint key_length;
key=query_cache_query_get_key((byte*) block, &key_length, 0);
hash_search(&queries, (byte*) key, key_length);
hash_first(&queries, (byte*) key, key_length, &record_idx);
// Move table of used tables
memmove((char*) new_block->table(0), (char*) block->table(0),
ALIGN_SIZE(n_tables*sizeof(Query_cache_block_table)));
......@@ -3194,7 +3196,7 @@ my_bool Query_cache::move_by_type(byte **border,
net->query_cache_query= (gptr) new_block;
}
/* Fix hash to point at moved block */
hash_replace(&queries, queries.current_record, (byte*) new_block);
hash_replace(&queries, &record_idx, (byte*) new_block);
DBUG_PRINT("qcache", ("moved %lu bytes to 0x%lx, new gap at 0x%lx",
len, (ulong) new_block, (ulong) *border));
break;
......
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