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manual merge 5.0-runtime -> 5.1->runtime, with 25411 part I

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unknown
2007-04-25 21:38:12 -06:00
parent 5e414cd222
commit 034c11f3cd
18 changed files with 479 additions and 300 deletions
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103
sql/sql_parse.cc
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@ -300,6 +300,7 @@ pthread_handler_t handle_bootstrap(void *arg)
THD *thd=(THD*) arg;
FILE *file=bootstrap_file;
char *buff;
const char* found_semicolon= NULL;
/* The following must be called before DBUG_ENTER */
thd->thread_stack= (char*) &thd;
@ -375,7 +376,7 @@ pthread_handler_t handle_bootstrap(void *arg)
*/
thd->query_id=next_query_id();
thd->set_time();
mysql_parse(thd,thd->query,length);
mysql_parse(thd, thd->query, length, & found_semicolon);
close_thread_tables(thd); // Free tables
if (thd->is_fatal_error)
@ -889,17 +890,19 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
char *packet_end= thd->query + thd->query_length;
/* 'b' stands for 'buffer' parameter', special for 'my_snprintf' */
const char *format= "%.*b";
const char* found_semicolon= NULL;
general_log_print(thd, command, format, thd->query_length, thd->query);
DBUG_PRINT("query",("%-.4096s",thd->query));
if (!(specialflag & SPECIAL_NO_PRIOR))
my_pthread_setprio(pthread_self(),QUERY_PRIOR);
mysql_parse(thd,thd->query, thd->query_length);
mysql_parse(thd, thd->query, thd->query_length, & found_semicolon);
while (!thd->killed && thd->lex->found_semicolon && !thd->net.report_error)
while (!thd->killed && found_semicolon && !thd->net.report_error)
{
char *next_packet= thd->lex->found_semicolon;
char *next_packet= (char*) found_semicolon;
net->no_send_error= 0;
/*
Multiple queries exits, execute them individually
@ -924,7 +927,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
thd->set_time(); /* Reset the query start time. */
/* TODO: set thd->lex->sql_command to SQLCOM_END here */
VOID(pthread_mutex_unlock(&LOCK_thread_count));
mysql_parse(thd, next_packet, length);
mysql_parse(thd, next_packet, length, & found_semicolon);
}
if (!(specialflag & SPECIAL_NO_PRIOR))
@ -946,7 +949,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
uint dummy;
/* used as fields initializator */
lex_start(thd, 0, 0);
lex_start(thd);
statistic_increment(thd->status_var.com_stat[SQLCOM_SHOW_FIELDS],
&LOCK_status);
@ -985,7 +988,10 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
break;
/* init structures for VIEW processing */
table_list.select_lex= &(thd->lex->select_lex);
mysql_init_query(thd, "", 0);
lex_start(thd);
mysql_reset_thd_for_next_command(thd);
thd->lex->
select_lex.table_list.link_in_list((byte*) &table_list,
(byte**) &table_list.next_local);
@ -5038,20 +5044,6 @@ bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, ulong *yystacksize)
}
/****************************************************************************
Initialize global thd variables needed for query
****************************************************************************/
void
mysql_init_query(THD *thd, const char *buf, uint length)
{
DBUG_ENTER("mysql_init_query");
lex_start(thd, buf, length);
mysql_reset_thd_for_next_command(thd);
DBUG_VOID_RETURN;
}
/*
Reset THD part responsible for command processing state.
@ -5263,22 +5255,55 @@ void mysql_init_multi_delete(LEX *lex)
mysql_test_parse_for_slave() in this same file.
*/
void mysql_parse(THD *thd, char *inBuf, uint length)
/**
Parse a query.
@param thd Current thread
@param inBuf Begining of the query text
@param length Length of the query text
@param [out] semicolon For multi queries, position of the character of
the next query in the query text.
*/
void mysql_parse(THD *thd, const char *inBuf, uint length,
const char ** found_semicolon)
{
DBUG_ENTER("mysql_parse");
DBUG_EXECUTE_IF("parser_debug", turn_parser_debug_on(););
mysql_init_query(thd, inBuf, length);
/*
Warning.
The purpose of query_cache_send_result_to_client() is to lookup the
query in the query cache first, to avoid parsing and executing it.
So, the natural implementation would be to:
- first, call query_cache_send_result_to_client,
- second, if caching failed, initialise the lexical and syntactic parser.
The problem is that the query cache depends on a clean initialization
of (among others) lex->safe_to_cache_query and thd->server_status,
which are reset respectively in
- lex_start()
- mysql_reset_thd_for_next_command()
So, initializing the lexical analyser *before* using the query cache
is required for the cache to work properly.
FIXME: cleanup the dependencies in the code to simplify this.
*/
lex_start(thd);
mysql_reset_thd_for_next_command(thd);
if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
if (query_cache_send_result_to_client(thd, (char*) inBuf, length) <= 0)
{
LEX *lex= thd->lex;
sp_cache_flush_obsolete(&thd->sp_proc_cache);
sp_cache_flush_obsolete(&thd->sp_func_cache);
if (!MYSQLparse((void *)thd) && ! thd->is_fatal_error)
Lex_input_stream lip(thd, inBuf, length);
thd->m_lip= &lip;
int err= MYSQLparse(thd);
*found_semicolon= lip.found_semicolon;
if (!err && ! thd->is_fatal_error)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (mqh_used && thd->user_connect &&
@ -5301,8 +5326,8 @@ void mysql_parse(THD *thd, char *inBuf, uint length)
PROCESSLIST.
Note that we don't need LOCK_thread_count to modify query_length.
*/
if (lex->found_semicolon &&
(thd->query_length= (ulong)(lex->found_semicolon - thd->query)))
if (lip.found_semicolon &&
(thd->query_length= (ulong)(lip.found_semicolon - thd->query)))
thd->query_length--;
/* Actually execute the query */
mysql_execute_command(thd);
@ -5329,6 +5354,12 @@ void mysql_parse(THD *thd, char *inBuf, uint length)
thd->cleanup_after_query();
DBUG_ASSERT(thd->change_list.is_empty());
}
else
{
/* There are no multi queries in the cache. */
*found_semicolon= NULL;
}
DBUG_VOID_RETURN;
}
@ -5349,8 +5380,13 @@ bool mysql_test_parse_for_slave(THD *thd, char *inBuf, uint length)
bool error= 0;
DBUG_ENTER("mysql_test_parse_for_slave");
mysql_init_query(thd, inBuf, length);
if (!MYSQLparse((void*) thd) && ! thd->is_fatal_error &&
Lex_input_stream lip(thd, inBuf, length);
thd->m_lip= &lip;
lex_start(thd);
mysql_reset_thd_for_next_command(thd);
int err= MYSQLparse((void*) thd);
if (!err && ! thd->is_fatal_error &&
all_tables_not_ok(thd,(TABLE_LIST*) lex->select_lex.table_list.first))
error= 1; /* Ignore question */
thd->end_statement();
@ -6401,8 +6437,9 @@ bool check_simple_select()
if (lex->current_select != &lex->select_lex)
{
char command[80];
strmake(command, lex->yylval->symbol.str,
min(lex->yylval->symbol.length, sizeof(command)-1));
Lex_input_stream *lip= thd->m_lip;
strmake(command, lip->yylval->symbol.str,
min(lip->yylval->symbol.length, sizeof(command)-1));
my_error(ER_CANT_USE_OPTION_HERE, MYF(0), command);
return 1;
}