mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-29 18:20:07 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge chilla.local:/home/mydev/mysql-5.0

Browse source 
into  chilla.local:/home/mydev/mysql-5.0-bug16218
This commit is contained in:
ingo@chilla.local 2006-07-06 19:36:07 +02:00
commit 591d461d95
6 changed files with 91 additions and 37 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
sql/field.cc
View file

@ -1515,7 +1515,8 @@ bool Field::optimize_range(uint idx, uint part)
}
Field *Field::new_field(MEM_ROOT *root, struct st_table *new_table)
Field *Field::new_field(MEM_ROOT *root, struct st_table *new_table,
bool keep_type __attribute__((unused)))
{
Field *tmp;
if (!(tmp= (Field*) memdup_root(root,(char*) this,size_of())))
@ -1540,7 +1541,7 @@ Field *Field::new_key_field(MEM_ROOT *root, struct st_table *new_table,
uint new_null_bit)
{
Field *tmp;
if ((tmp= new_field(root, new_table)))
if ((tmp= new_field(root, new_table, table == new_table)))
{
tmp->ptr= new_ptr;
tmp->null_ptr= new_null_ptr;
@ -6227,29 +6228,21 @@ uint Field_string::max_packed_col_length(uint max_length)
}
Field *Field_string::new_field(MEM_ROOT *root, struct st_table *new_table)
Field *Field_string::new_field(MEM_ROOT *root, struct st_table *new_table,
bool keep_type)
{
Field *new_field;
if (type() != MYSQL_TYPE_VAR_STRING || table == new_table)
return Field::new_field(root, new_table);
if (type() != MYSQL_TYPE_VAR_STRING || keep_type)
return Field::new_field(root, new_table, keep_type);
/*
Old VARCHAR field which should be modified to a VARCHAR on copy
This is done to ensure that ALTER TABLE will convert old VARCHAR fields
to now VARCHAR fields.
*/
if ((new_field= new Field_varstring(field_length, maybe_null(),
field_name, new_table, charset())))
{
/*
delayed_insert::get_local_table() needs a ptr copied from old table.
This is what other new_field() methods do too. The above method of
Field_varstring sets ptr to NULL.
*/
new_field->ptr= ptr;
}
return new_field;
return new Field_varstring(field_length, maybe_null(),
field_name, new_table, charset());
}
/****************************************************************************
@ -6741,9 +6734,11 @@ int Field_varstring::cmp_binary(const char *a_ptr, const char *b_ptr,
}
Field *Field_varstring::new_field(MEM_ROOT *root, struct st_table *new_table)
Field *Field_varstring::new_field(MEM_ROOT *root, struct st_table *new_table,
bool keep_type)
{
Field_varstring *res= (Field_varstring*) Field::new_field(root, new_table);
Field_varstring *res= (Field_varstring*) Field::new_field(root, new_table,
keep_type);
if (res)
res->length_bytes= length_bytes;
return res;

7
sql/field.h
View file

@ -211,7 +211,8 @@ public:
*/
virtual bool can_be_compared_as_longlong() const { return FALSE; }
virtual void free() {}
virtual Field *new_field(MEM_ROOT *root, struct st_table *new_table);
virtual Field *new_field(MEM_ROOT *root, struct st_table *new_table,
bool keep_type);
virtual Field *new_key_field(MEM_ROOT *root, struct st_table *new_table,
char *new_ptr, uchar *new_null_ptr,
uint new_null_bit);
@ -1033,7 +1034,7 @@ public:
enum_field_types real_type() const { return FIELD_TYPE_STRING; }
bool has_charset(void) const
{ return charset() == &my_charset_bin ? FALSE : TRUE; }
Field *new_field(MEM_ROOT *root, struct st_table *new_table);
Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type);
};
@ -1105,7 +1106,7 @@ public:
enum_field_types real_type() const { return MYSQL_TYPE_VARCHAR; }
bool has_charset(void) const
{ return charset() == &my_charset_bin ? FALSE : TRUE; }
Field *new_field(MEM_ROOT *root, struct st_table *new_table);
Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type);
Field *new_key_field(MEM_ROOT *root, struct st_table *new_table,
char *new_ptr, uchar *new_null_ptr,
uint new_null_bit);

79
sql/sql_insert.cc
View file

@ -17,6 +17,44 @@
/* Insert of records */
/*
INSERT DELAYED
Insert delayed is distinguished from a normal insert by lock_type ==
TL_WRITE_DELAYED instead of TL_WRITE. It first tries to open a
"delayed" table (delayed_get_table()), but falls back to
open_and_lock_tables() on error and proceeds as normal insert then.
Opening a "delayed" table means to find a delayed insert thread that
has the table open already. If this fails, a new thread is created and
waited for to open and lock the table.
If accessing the thread succeeded, in
delayed_insert::get_local_table() the table of the thread is copied
for local use. A copy is required because the normal insert logic
works on a target table, but the other threads table object must not
be used. The insert logic uses the record buffer to create a record.
And the delayed insert thread uses the record buffer to pass the
record to the table handler. So there must be different objects. Also
the copied table is not included in the lock, so that the statement
can proceed even if the real table cannot be accessed at this moment.
Copying a table object is not a trivial operation. Besides the TABLE
object there are the field pointer array, the field objects and the
record buffer. After copying the field objects, their pointers into
the record must be "moved" to point to the new record buffer.
After this setup the normal insert logic is used. Only that for
delayed inserts write_delayed() is called instead of write_record().
It inserts the rows into a queue and signals the delayed insert thread
instead of writing directly to the table.
The delayed insert thread awakes from the signal. It locks the table,
inserts the rows from the queue, unlocks the table, and waits for the
next signal. It does normally live until a FLUSH TABLES or SHUTDOWN.
*/
#include "mysql_priv.h"
#include "sp_head.h"
#include "sql_trigger.h"
@ -1441,6 +1479,7 @@ TABLE *delayed_insert::get_local_table(THD* client_thd)
my_ptrdiff_t adjust_ptrs;
Field **field,**org_field, *found_next_number_field;
TABLE *copy;
DBUG_ENTER("delayed_insert::get_local_table");
/* First request insert thread to get a lock */
status=1;
@ -1464,31 +1503,47 @@ TABLE *delayed_insert::get_local_table(THD* client_thd)
}
}
/*
Allocate memory for the TABLE object, the field pointers array, and
one record buffer of reclength size. Normally a table has three
record buffers of rec_buff_length size, which includes alignment
bytes. Since the table copy is used for creating one record only,
the other record buffers and alignment are unnecessary.
*/
client_thd->proc_info="allocating local table";
copy= (TABLE*) client_thd->alloc(sizeof(*copy)+
(table->s->fields+1)*sizeof(Field**)+
table->s->reclength);
if (!copy)
goto error;
/* Copy the TABLE object. */
*copy= *table;
copy->s= &copy->share_not_to_be_used;
// No name hashing
bzero((char*) &copy->s->name_hash,sizeof(copy->s->name_hash));
/* We don't need to change the file handler here */
field=copy->field=(Field**) (copy+1);
copy->record[0]=(byte*) (field+table->s->fields+1);
memcpy((char*) copy->record[0],(char*) table->record[0],table->s->reclength);
/* Assign the pointers for the field pointers array and the record. */
field= copy->field= (Field**) (copy + 1);
copy->record[0]= (byte*) (field + table->s->fields + 1);
memcpy((char*) copy->record[0], (char*) table->record[0],
table->s->reclength);
/* Make a copy of all fields */
/*
Make a copy of all fields.
The copied fields need to point into the copied record. This is done
by copying the field objects with their old pointer values and then
"move" the pointers by the distance between the original and copied
records. That way we preserve the relative positions in the records.
*/
adjust_ptrs= PTR_BYTE_DIFF(copy->record[0], table->record[0]);
adjust_ptrs=PTR_BYTE_DIFF(copy->record[0],table->record[0]);
found_next_number_field=table->found_next_number_field;
for (org_field=table->field ; *org_field ; org_field++,field++)
found_next_number_field= table->found_next_number_field;
for (org_field= table->field; *org_field; org_field++, field++)
{
if (!(*field= (*org_field)->new_field(client_thd->mem_root,copy)))
return 0;
if (!(*field= (*org_field)->new_field(client_thd->mem_root, copy, 1)))
DBUG_RETURN(0);
(*field)->orig_table= copy; // Remove connection
(*field)->move_field(adjust_ptrs); // Point at copy->record[0]
if (*org_field == found_next_number_field)
@ -1515,14 +1570,14 @@ TABLE *delayed_insert::get_local_table(THD* client_thd)
/* Adjust lock_count. This table object is not part of a lock. */
copy->lock_count= 0;
return copy;
DBUG_RETURN(copy);
/* Got fatal error */
error:
tables_in_use--;
status=1;
pthread_cond_signal(&cond); // Inform thread about abort
return 0;
DBUG_RETURN(0);
}

5
sql/sql_select.cc
View file

@ -8017,7 +8017,8 @@ Field* create_tmp_field_from_field(THD *thd, Field* org_field,
org_field->field_name, table,
org_field->charset());
else
new_field= org_field->new_field(thd->mem_root, table);
new_field= org_field->new_field(thd->mem_root, table,
table == org_field->table);
if (new_field)
{
if (item)
@ -13062,7 +13063,7 @@ setup_copy_fields(THD *thd, TMP_TABLE_PARAM *param,
saved value
*/
Field *field= item->field;
item->result_field=field->new_field(thd->mem_root,field->table);
item->result_field=field->new_field(thd->mem_root,field->table, 1);
char *tmp=(char*) sql_alloc(field->pack_length()+1);
if (!tmp)
goto err;

3
sql/sql_trigger.cc
View file

@ -747,7 +747,8 @@ bool Table_triggers_list::prepare_record1_accessors(TABLE *table)
QQ: it is supposed that it is ok to use this function for field
cloning...
*/
if (!(*old_fld= (*fld)->new_field(&table->mem_root, table)))
if (!(*old_fld= (*fld)->new_field(&table->mem_root, table,
table == (*fld)->table)))
return 1;
(*old_fld)->move_field((my_ptrdiff_t)(table->record[1] -
table->record[0]));

3
sql/table.cc
View file

@ -804,7 +804,8 @@ int openfrm(THD *thd, const char *name, const char *alias, uint db_stat,
if (!(field->flags & BLOB_FLAG))
{ // Create a new field
field=key_part->field=field->new_field(&outparam->mem_root,
outparam);
outparam,
outparam == field->table);
field->field_length=key_part->length;
}
}