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Prepared_statement deployed instead of PREP_STMT.

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This commit is contained in:
konstantin@oak.local
2003-12-20 02:16:10 +03:00
parent d37da004f6
commit 2a25b2617a
8 changed files with 613 additions and 430 deletions
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140
sql/sql_class.cc
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@ -88,21 +88,20 @@ THD::THD():user_time(0), is_fatal_error(0),
insert_id_used(0), rand_used(0), in_lock_tables(0),
global_read_lock(0), bootstrap(0)
{
host=user=priv_user=db=query=ip=0;
lex= &main_lex;
host= user= priv_user= db= ip=0;
host_or_ip= "connecting host";
locked=killed=some_tables_deleted=no_errors=password= 0;
query_start_used= 0;
count_cuted_fields= CHECK_FIELD_IGNORE;
db_length=query_length=col_access=0;
db_length= col_access= 0;
query_error= tmp_table_used= 0;
next_insert_id=last_insert_id=0;
open_tables= temporary_tables= handler_tables= derived_tables= 0;
handler_items=0;
tmp_table=0;
lock=locked_tables=0;
used_tables=0;
cuted_fields= sent_row_count= current_stmt_id= 0L;
cuted_fields= sent_row_count= 0L;
statement_id_counter= 0UL;
// Must be reset to handle error with THD's created for init of mysqld
lex->current_select= 0;
start_time=(time_t) 0;
@ -138,7 +137,6 @@ THD::THD():user_time(0), is_fatal_error(0),
server_id = ::server_id;
slave_net = 0;
command=COM_CONNECT;
set_query_id=1;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
db_access=NO_ACCESS;
#endif
@ -146,10 +144,11 @@ THD::THD():user_time(0), is_fatal_error(0),
*scramble= '\0';
init();
init_sql_alloc(&mem_root, // must be after init()
variables.query_alloc_block_size,
variables.query_prealloc_size);
/* Initialize sub structures */
bzero((char*) &mem_root,sizeof(mem_root));
bzero((char*) &transaction.mem_root,sizeof(transaction.mem_root));
bzero((char*) &con_root,sizeof(con_root));
bzero((char*) &warn_root,sizeof(warn_root));
init_alloc_root(&warn_root, WARN_ALLOC_BLOCK_SIZE, WARN_ALLOC_PREALLOC_SIZE);
user_connect=(USER_CONN *)0;
@ -166,12 +165,6 @@ THD::THD():user_time(0), is_fatal_error(0),
else
bzero((char*) &user_var_events, sizeof(user_var_events));
/* Prepared statements */
last_prepared_stmt= 0;
init_tree(&prepared_statements, 0, 0, sizeof(PREP_STMT),
(qsort_cmp2) compare_prep_stmt, 1,
(tree_element_free) free_prep_stmt, 0);
/* Protocol */
protocol= &protocol_simple; // Default protocol
protocol_simple.init(this);
@ -189,7 +182,9 @@ THD::THD():user_time(0), is_fatal_error(0),
transaction.trans_log.end_of_file= max_binlog_cache_size;
}
#endif
init_sql_alloc(&transaction.mem_root,
variables.trans_alloc_block_size,
variables.trans_prealloc_size);
/*
We need good random number initialization for new thread
Just coping global one will not work
@ -232,22 +227,6 @@ void THD::init(void)
}
/*
Init THD for query processing
This has to be called once before we call mysql_parse()
*/
void THD::init_for_queries()
{
init_sql_alloc(&mem_root, variables.query_alloc_block_size,
variables.query_prealloc_size);
init_sql_alloc(&transaction.mem_root,
variables.trans_alloc_block_size,
variables.trans_prealloc_size);
}
/*
Do what's needed when one invokes change user
@ -276,7 +255,6 @@ void THD::cleanup(void)
{
DBUG_ENTER("THD::cleanup");
ha_rollback(this);
delete_tree(&prepared_statements);
if (locked_tables)
{
lock=locked_tables; locked_tables=0;
@ -340,8 +318,6 @@ THD::~THD()
safeFree(user);
safeFree(db);
safeFree(ip);
free_root(&mem_root,MYF(0));
free_root(&con_root,MYF(0));
free_root(&warn_root,MYF(0));
free_root(&transaction.mem_root,MYF(0));
mysys_var=0; // Safety (shouldn't be needed)
@ -1193,6 +1169,102 @@ int select_dumpvar::prepare(List<Item> &list, SELECT_LEX_UNIT *u)
}
return 0;
}
/*
Statement functions
*/
Statement::Statement(THD *thd)
:id(++thd->statement_id_counter),
query_id(thd->query_id),
set_query_id(1),
allow_sum_func(0),
command(thd->command),
lex(&main_lex),
query(0),
query_length(0),
free_list(0)
{
init_sql_alloc(&mem_root,
thd->variables.query_alloc_block_size,
thd->variables.query_prealloc_size);
}
/*
This constructor is called when statement is a subobject of THD:
Some variables are initialized in THD::init due to locking problems
This statement object will be used to
*/
Statement::Statement()
:id(0),
query_id(0), /* initialized later */
set_query_id(1),
allow_sum_func(0), /* initialized later */
command(COM_SLEEP), /* initialized later */
lex(&main_lex),
query(0), /* these two are set */
query_length(0), /* in alloc_query() */
free_list(0)
{
bzero((char *) &mem_root, sizeof(mem_root));
}
Statement::Type Statement::type() const
{
return STATEMENT;
}
void Statement::set_statement(Statement *stmt)
{
id= stmt->id;
query_id= stmt->query_id;
set_query_id= stmt->set_query_id;
allow_sum_func= stmt->allow_sum_func;
command= stmt->command;
lex= stmt->lex;
query= stmt->query;
query_length= stmt->query_length;
free_list= stmt->free_list;
mem_root= stmt->mem_root;
}
Statement::~Statement()
{
free_root(&mem_root, MYF(0));
}
C_MODE_START
static byte *
get_statement_id_as_hash_key(const byte *record, uint *key_length,
my_bool not_used __attribute__((unused)))
{
const Statement *statement= (const Statement *) record;
*key_length= sizeof(statement->id);
return (byte *) &((const Statement *) statement)->id;
}
static void delete_statement_as_hash_key(void *key)
{
delete (Statement *) key;
}
C_MODE_END
Statement_map::Statement_map() :
last_found_statement(0)
{
enum { START_HASH_SIZE = 16 };
hash_init(&st_hash, default_charset_info, START_HASH_SIZE, 0, 0,
get_statement_id_as_hash_key,
delete_statement_as_hash_key, MYF(0));
}
bool select_dumpvar::send_data(List<Item> &items)
{
List_iterator_fast<Item_func_set_user_var> li(vars);