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Merge weblab.(none):/home/marcsql/TREE/mysql-5.0-8407_b

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into  weblab.(none):/home/marcsql/TREE/mysql-5.1-8407-merge


mysql-test/r/information_schema_db.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
mysql-test/t/sp.test:
  Auto merged
sql/lock.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sp_head.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql/table.cc:
  Auto merged
sql/table.h:
  Auto merged
This commit is contained in:
unknown
2007-03-06 10:33:10 -07:00
parent c155c66da6 266a7fff52
commit 0708859ba8
12 changed files with 259 additions and 31 deletions
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102
sql/sql_base.cc
View File

@ -28,6 +28,59 @@
#include <io.h>
#endif
/**
This internal handler is used to trap internally
errors that can occur when executing open table
during the prelocking phase.
*/
class Prelock_error_handler : public Internal_error_handler
{
public:
Prelock_error_handler()
: m_handled_errors(0), m_unhandled_errors(0)
{}
virtual ~Prelock_error_handler() {}
virtual bool handle_error(uint sql_errno,
MYSQL_ERROR::enum_warning_level level,
THD *thd);
bool safely_trapped_errors();
private:
int m_handled_errors;
int m_unhandled_errors;
};
bool
Prelock_error_handler::handle_error(uint sql_errno,
MYSQL_ERROR::enum_warning_level /* level */,
THD * /* thd */)
{
if (sql_errno == ER_NO_SUCH_TABLE)
{
m_handled_errors++;
return TRUE; // 'TRUE', as per coding style
}
m_unhandled_errors++;
return FALSE; // 'FALSE', as per coding style
}
bool Prelock_error_handler::safely_trapped_errors()
{
/*
If m_unhandled_errors != 0, something else, unanticipated, happened,
so the error is not trapped but returned to the caller.
Multiple ER_NO_SUCH_TABLE can be raised in case of views.
*/
return ((m_handled_errors > 0) && (m_unhandled_errors == 0));
}
TABLE *unused_tables; /* Used by mysql_test */
HASH open_cache; /* Used by mysql_test */
static HASH table_def_cache;
@ -1977,7 +2030,10 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
VOID(pthread_mutex_unlock(&LOCK_open));
}
}
my_error(ER_TABLE_NOT_LOCKED, MYF(0), alias);
if ((thd->locked_tables) && (thd->locked_tables->lock_count > 0))
my_error(ER_TABLE_NOT_LOCKED, MYF(0), alias);
else
my_error(ER_NO_SUCH_TABLE, MYF(0), table_list->db, table_list->alias);
DBUG_RETURN(0);
}
@ -2860,6 +2916,8 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
MEM_ROOT new_frm_mem;
/* Also used for indicating that prelocking is need */
TABLE_LIST **query_tables_last_own;
bool safe_to_ignore_table;
DBUG_ENTER("open_tables");
/*
temporary mem_root for new .frm parsing.
@ -2908,6 +2966,7 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
for (tables= *start; tables ;tables= tables->next_global)
{
safe_to_ignore_table= FALSE; // 'FALSE', as per coding style
/*
Ignore placeholders for derived tables. After derived tables
processing, link to created temporary table will be put here.
@ -2927,9 +2986,28 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
DBUG_RETURN(-1);
}
(*counter)++;
if (!tables->table &&
!(tables->table= open_table(thd, tables, &new_frm_mem, &refresh, flags)))
if (!tables->table)
{
if (tables->prelocking_placeholder)
{
/*
For the tables added by the pre-locking code, attempt to open
the table but fail silently if the table does not exist.
The real failure will occur when/if a statement attempts to use
that table.
*/
Prelock_error_handler prelock_handler;
thd->push_internal_handler(& prelock_handler);
tables->table= open_table(thd, tables, &new_frm_mem, &refresh, flags);
thd->pop_internal_handler();
safe_to_ignore_table= prelock_handler.safely_trapped_errors();
}
else
tables->table= open_table(thd, tables, &new_frm_mem, &refresh, flags);
}
if (!tables->table)
{
free_root(&new_frm_mem, MYF(MY_KEEP_PREALLOC));
@ -2980,6 +3058,14 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
close_tables_for_reopen(thd, start);
goto restart;
}
if (safe_to_ignore_table)
{
DBUG_PRINT("info", ("open_table: ignoring table '%s'.'%s'",
tables->db, tables->alias));
continue;
}
result= -1; // Fatal error
break;
}
@ -3283,7 +3369,7 @@ bool open_normal_and_derived_tables(THD *thd, TABLE_LIST *tables, uint flags)
static void mark_real_tables_as_free_for_reuse(TABLE_LIST *table)
{
for (; table; table= table->next_global)
if (!table->placeholder() && !table->schema_table)
if (!table->placeholder())
table->table->query_id= 0;
}
@ -3356,7 +3442,7 @@ int lock_tables(THD *thd, TABLE_LIST *tables, uint count, bool *need_reopen)
DBUG_RETURN(-1);
for (table= tables; table; table= table->next_global)
{
if (!table->placeholder() && !table->schema_table)
if (!table->placeholder())
*(ptr++)= table->table;
}
@ -3409,7 +3495,7 @@ int lock_tables(THD *thd, TABLE_LIST *tables, uint count, bool *need_reopen)
for (table= tables; table != first_not_own; table= table->next_global)
{
if (!table->placeholder() && !table->schema_table)
if (!table->placeholder())
{
table->table->query_id= thd->query_id;
if (check_lock_and_start_stmt(thd, table->table, table->lock_type))
@ -3436,7 +3522,7 @@ int lock_tables(THD *thd, TABLE_LIST *tables, uint count, bool *need_reopen)
TABLE_LIST *first_not_own= thd->lex->first_not_own_table();
for (table= tables; table != first_not_own; table= table->next_global)
{
if (!table->placeholder() && !table->schema_table &&
if (!table->placeholder() &&
check_lock_and_start_stmt(thd, table->table, table->lock_type))
{
ha_rollback_stmt(thd);