From d8b6f46a390951d3da038bd366b38760ae5a38c9 Mon Sep 17 00:00:00 2001 From: "igor@rurik.mysql.com" <> Date: Thu, 19 Oct 2006 23:05:53 -0700 Subject: [PATCH 01/10] Fixed bug #23478. If elements a not top-level IN subquery were accessed by an index and the subquery result set included a NULL value then the quantified predicate that contained the subquery was evaluated to NULL when it should return a non-null value. --- mysql-test/r/subselect.result | 15 +++++++++++++++ mysql-test/t/subselect.test | 17 +++++++++++++++++ sql/item_subselect.cc | 3 +++ 3 files changed, 35 insertions(+) diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index ad847b5f156..28fbfc86657 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -2982,3 +2982,18 @@ field1 field2 1 1 1 3 DROP TABLE t1, t2; +CREATE TABLE t1(a int, INDEX (a)); +INSERT INTO t1 VALUES (1), (3), (5), (7); +INSERT INTO t1 VALUES (NULL); +CREATE TABLE t2(a int); +INSERT INTO t2 VALUES (1),(2),(3); +EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 3 +2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 2 Using index +SELECT a, a IN (SELECT a FROM t1) FROM t2; +a a IN (SELECT a FROM t1) +1 1 +2 NULL +3 1 +DROP TABLE t1,t2; diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index 6defa8b16a5..ac035c72d18 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -1948,4 +1948,21 @@ SELECT field1, field2 DROP TABLE t1, t2; +# +# Bug #23478: not top-level IN subquery returning a non-empty result set +# with possible NULL values by index access from the outer query +# + +CREATE TABLE t1(a int, INDEX (a)); +INSERT INTO t1 VALUES (1), (3), (5), (7); +INSERT INTO t1 VALUES (NULL); + +CREATE TABLE t2(a int); +INSERT INTO t2 VALUES (1),(2),(3); + +EXPLAIN SELECT a, a IN (SELECT a FROM t1) FROM t2; +SELECT a, a IN (SELECT a FROM t1) FROM t2; + +DROP TABLE t1,t2; + # End of 4.1 tests diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index f3be0663af8..1ab81d1862d 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -610,6 +610,7 @@ double Item_in_subselect::val() */ DBUG_ASSERT(0); DBUG_ASSERT(fixed == 1); + null_value= 0; if (exec()) { reset(); @@ -625,6 +626,7 @@ double Item_in_subselect::val() longlong Item_in_subselect::val_int() { DBUG_ASSERT(fixed == 1); + null_value= 0; if (exec()) { reset(); @@ -645,6 +647,7 @@ String *Item_in_subselect::val_str(String *str) */ DBUG_ASSERT(0); DBUG_ASSERT(fixed == 1); + null_value= 0; if (exec()) { reset(); From 4d23559806b9380f985e42350b69bcfb03403208 Mon Sep 17 00:00:00 2001 From: "holyfoot/hf@mysql.com/deer.(none)" <> Date: Mon, 23 Oct 2006 15:02:51 +0500 Subject: [PATCH 02/10] WL#3475 (Threads for the embedded server in mysqltest) Necessary code added to mysqltest.c. Disabled tests are available now. --- client/mysqltest.c | 102 +++++++++++++++++++++++---- libmysql/libmysql.c | 7 -- mysql-test/t/bdb-deadlock.test | 8 --- mysql-test/t/flush.test | 8 --- mysql-test/t/flush_block_commit.test | 3 - mysql-test/t/innodb-deadlock.test | 2 - mysql-test/t/innodb-lock.test | 2 - mysql-test/t/lock_multi.test | 8 --- mysql-test/t/rename.test | 4 -- mysql-test/t/show_check.test | 3 +- mysql-test/t/status.test | 7 -- 11 files changed, 90 insertions(+), 64 deletions(-) diff --git a/client/mysqltest.c b/client/mysqltest.c index ad0f9f857bb..6889ae1a84c 100644 --- a/client/mysqltest.c +++ b/client/mysqltest.c @@ -23,6 +23,7 @@ * Matt Wagner * Monty * Jani + * Holyfoot **/ /********************************************************************** @@ -215,6 +216,12 @@ struct connection { MYSQL mysql; char *name; + + const char *cur_query; + int cur_query_len; + pthread_mutex_t mutex; + pthread_cond_t cond; + int query_done; }; typedef struct @@ -461,6 +468,57 @@ static void replace_dynstr_append_mem(DYNAMIC_STRING *ds, const char *val, int len); static int handle_no_error(struct st_query *q); +#ifdef EMBEDDED_LIBRARY +/* + send_one_query executes query in separate thread what is + necessary in embedded library to run 'send' in proper way. + This implementation doesn't handle errors returned + by mysql_send_query. It's technically possible, though + i don't see where it is needed. +*/ +pthread_handler_decl(send_one_query, arg) +{ + struct connection *cn= (struct connection*)arg; + + mysql_thread_init(); + VOID(mysql_send_query(&cn->mysql, cn->cur_query, cn->cur_query_len)); + + mysql_thread_end(); + pthread_mutex_lock(&cn->mutex); + cn->query_done= 1; + VOID(pthread_cond_signal(&cn->cond)); + pthread_mutex_unlock(&cn->mutex); + pthread_exit(0); + return 0; +} + +static int do_send_query(struct connection *cn, const char *q, int q_len, + int flags) +{ + pthread_t tid; + + if (flags & QUERY_REAP) + return mysql_send_query(&cn->mysql, q, q_len); + + if (pthread_mutex_init(&cn->mutex, NULL) || + pthread_cond_init(&cn->cond, NULL)) + die("Error in the thread library"); + + cn->cur_query= q; + cn->cur_query_len= q_len; + cn->query_done= 0; + if (pthread_create(&tid, NULL, send_one_query, (void*)cn)) + die("Cannot start new thread for query"); + + return 0; +} + +#else /*EMBEDDED_LIBRARY*/ + +#define do_send_query(cn,q,q_len,flags) mysql_send_query(&cn->mysql, q, q_len) + +#endif /*EMBEDDED_LIBRARY*/ + static void do_eval(DYNAMIC_STRING* query_eval, const char *query) { const char *p; @@ -1849,7 +1907,7 @@ int close_connection(struct st_query *q) #ifndef EMBEDDED_LIBRARY if (q->type == Q_DIRTY_CLOSE) { - if (con->mysql.net.vio) + while (con->mysql.net.vio) { vio_delete(con->mysql.net.vio); con->mysql.net.vio = 0; @@ -2767,15 +2825,17 @@ static void append_result(DYNAMIC_STRING *ds, MYSQL_RES *res) * the result will be read - for regular query, both bits must be on */ -static int run_query_normal(MYSQL *mysql, struct st_query *q, int flags); -static int run_query_stmt (MYSQL *mysql, struct st_query *q, int flags); +static int run_query_normal(struct connection *cn, struct st_query *q, + int flags); +static int run_query_stmt (struct connection *cn, struct st_query *q, + int flags); static void run_query_stmt_handle_warnings(MYSQL *mysql, DYNAMIC_STRING *ds); static int run_query_stmt_handle_error(char *query, struct st_query *q, MYSQL_STMT *stmt, DYNAMIC_STRING *ds); static void run_query_display_metadata(MYSQL_FIELD *field, uint num_fields, DYNAMIC_STRING *ds); -static int run_query(MYSQL *mysql, struct st_query *q, int flags) +static int run_query(struct connection *cn, struct st_query *q, int flags) { /* @@ -2791,13 +2851,15 @@ static int run_query(MYSQL *mysql, struct st_query *q, int flags) if (ps_protocol_enabled && disable_info && (flags & QUERY_SEND) && (flags & QUERY_REAP) && ps_match_re(q->query)) - return run_query_stmt(mysql, q, flags); - return run_query_normal(mysql, q, flags); + return run_query_stmt(cn, q, flags); + return run_query_normal(cn, q, flags); } -static int run_query_normal(MYSQL* mysql, struct st_query* q, int flags) +static int run_query_normal(struct connection *cn, struct st_query* q, + int flags) { + MYSQL *mysql= &cn->mysql; MYSQL_RES* res= 0; uint i; int error= 0, err= 0, counter= 0; @@ -2833,11 +2895,24 @@ static int run_query_normal(MYSQL* mysql, struct st_query* q, int flags) if (flags & QUERY_SEND) { - got_error_on_send= mysql_send_query(mysql, query, query_len); + got_error_on_send= do_send_query(cn, query, query_len, flags); if (got_error_on_send && q->expected_errno[0].type == ERR_EMPTY) die("unable to send query '%s' (mysql_errno=%d , errno=%d)", query, mysql_errno(mysql), errno); } +#ifdef EMBEDDED_LIBRARY + /* + Here we handle 'reap' command, so we need to check if the + query's thread was finished and probably wait + */ + else if (flags & QUERY_REAP) + { + pthread_mutex_lock(&cn->mutex); + if (!cn->query_done) + pthread_cond_wait(&cn->cond, &cn->mutex); + pthread_mutex_unlock(&cn->mutex); + } +#endif /*EMBEDDED_LIBRARY*/ do { @@ -3038,8 +3113,9 @@ end: complete SEND+REAP */ -static int run_query_stmt(MYSQL *mysql, struct st_query *q, int flags) +static int run_query_stmt(struct connection *cn, struct st_query *q, int flags) { + MYSQL *mysql= &cn->mysql; int error= 0; /* Function return code if "goto end;" */ int err; /* Temporary storage of return code from calls */ int query_len, got_error_on_execute; @@ -3095,7 +3171,7 @@ static int run_query_stmt(MYSQL *mysql, struct st_query *q, int flags) C API. */ if ((err= mysql_stmt_prepare(stmt, query, query_len)) == CR_NO_PREPARE_STMT) - return run_query_normal(mysql, q, flags); + return run_query_normal(cn, q, flags); if (err != 0) { @@ -3922,7 +3998,7 @@ int main(int argc, char **argv) q->require_file=require_file; save_file[0]=0; } - error|= run_query(&cur_con->mysql, q, QUERY_REAP|QUERY_SEND); + error|= run_query(cur_con, q, QUERY_REAP|QUERY_SEND); display_result_vertically= old_display_result_vertically; q->last_argument= q->end; query_executed= 1; @@ -3949,7 +4025,7 @@ int main(int argc, char **argv) q->require_file=require_file; save_file[0]=0; } - error |= run_query(&cur_con->mysql, q, flags); + error |= run_query(cur_con, q, flags); query_executed= 1; q->last_argument= q->end; break; @@ -3970,7 +4046,7 @@ int main(int argc, char **argv) query and read the result some time later when reap instruction is given on this connection. */ - error |= run_query(&cur_con->mysql, q, QUERY_SEND); + error |= run_query(cur_con, q, QUERY_SEND); query_executed= 1; q->last_argument= q->end; break; diff --git a/libmysql/libmysql.c b/libmysql/libmysql.c index 91c0b6b8864..5577ecdb556 100644 --- a/libmysql/libmysql.c +++ b/libmysql/libmysql.c @@ -4395,13 +4395,6 @@ int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt) set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate); DBUG_RETURN(1); } - if (result->data) - { - free_root(&result->alloc, MYF(MY_KEEP_PREALLOC)); - result->data= NULL; - result->rows= 0; - stmt->data_cursor= NULL; - } if (stmt->update_max_length && !stmt->bind_result_done) { diff --git a/mysql-test/t/bdb-deadlock.test b/mysql-test/t/bdb-deadlock.test index 88243cfc860..b48648e0fd0 100644 --- a/mysql-test/t/bdb-deadlock.test +++ b/mysql-test/t/bdb-deadlock.test @@ -1,11 +1,3 @@ -# This test doesn't work with the embedded version as this code -# assumes that one query is running while we are doing queries on -# a second connection. -# This would work if mysqltest run would be threaded and handle each -# connection in a separate thread. -# - --- source include/not_embedded.inc -- source include/have_bdb.inc connect (con1,localhost,root,,); diff --git a/mysql-test/t/flush.test b/mysql-test/t/flush.test index aedf8e85b65..8fe62ecac01 100644 --- a/mysql-test/t/flush.test +++ b/mysql-test/t/flush.test @@ -1,11 +1,3 @@ -# This test doesn't work with the embedded version as this code -# assumes that one query is running while we are doing queries on -# a second connection. -# This would work if mysqltest run would be threaded and handle each -# connection in a separate thread. -# --- source include/not_embedded.inc - connect (con1,localhost,root,,); connect (con2,localhost,root,,); connection con1; diff --git a/mysql-test/t/flush_block_commit.test b/mysql-test/t/flush_block_commit.test index 1e7ecd2548c..0c1d2b82df6 100644 --- a/mysql-test/t/flush_block_commit.test +++ b/mysql-test/t/flush_block_commit.test @@ -3,9 +3,6 @@ # We verify that we did not introduce a deadlock. # This is intended to mimick how mysqldump and innobackup work. -# This test doesn't work with the embedded server --- source include/not_embedded.inc - # And it requires InnoDB -- source include/have_innodb.inc diff --git a/mysql-test/t/innodb-deadlock.test b/mysql-test/t/innodb-deadlock.test index 41741942963..81acfba5c93 100644 --- a/mysql-test/t/innodb-deadlock.test +++ b/mysql-test/t/innodb-deadlock.test @@ -1,6 +1,4 @@ -- source include/have_innodb.inc -# Can't test this with embedded server --- source include/not_embedded.inc connect (con1,localhost,root,,); connect (con2,localhost,root,,); diff --git a/mysql-test/t/innodb-lock.test b/mysql-test/t/innodb-lock.test index 55a712fef9b..eacf7e562be 100644 --- a/mysql-test/t/innodb-lock.test +++ b/mysql-test/t/innodb-lock.test @@ -1,6 +1,4 @@ -- source include/have_innodb.inc -# Can't test this with embedded server --- source include/not_embedded.inc # # Check and select innodb lock type diff --git a/mysql-test/t/lock_multi.test b/mysql-test/t/lock_multi.test index 2e40aeaccb7..32e7f4234c4 100644 --- a/mysql-test/t/lock_multi.test +++ b/mysql-test/t/lock_multi.test @@ -1,11 +1,3 @@ -# This test doesn't work with the embedded version as this code -# assumes that one query is running while we are doing queries on -# a second connection. -# This would work if mysqltest run would be threaded and handle each -# connection in a separate thread. -# --- source include/not_embedded.inc - --disable_warnings drop table if exists t1,t2; --enable_warnings diff --git a/mysql-test/t/rename.test b/mysql-test/t/rename.test index 5caecef176e..ad9921d2cf0 100644 --- a/mysql-test/t/rename.test +++ b/mysql-test/t/rename.test @@ -2,10 +2,6 @@ # Test of rename table # -# Test requires concurrent connections, which can't be tested on embedded -# server --- source include/not_embedded.inc - --disable_warnings drop table if exists t0,t1,t2,t3,t4; # Clear up from other tests (to ensure that SHOW TABLES below is right) diff --git a/mysql-test/t/show_check.test b/mysql-test/t/show_check.test index d70903adbc4..8be676d9a35 100644 --- a/mysql-test/t/show_check.test +++ b/mysql-test/t/show_check.test @@ -1,5 +1,4 @@ -# Requires use of multiple simultaneous connections, not supported with -# embedded server testing +# Uses GRANT commands that usually disabled in embedded server -- source include/not_embedded.inc # diff --git a/mysql-test/t/status.test b/mysql-test/t/status.test index 7fea51c9327..df8da26df57 100644 --- a/mysql-test/t/status.test +++ b/mysql-test/t/status.test @@ -1,10 +1,3 @@ -# This test doesn't work with the embedded version as this code -# assumes that one query is running while we are doing queries on -# a second connection. -# This would work if mysqltest run would be threaded and handle each -# connection in a separate thread. -# ---source include/not_embedded.inc # PS causes different statistics --disable_ps_protocol From 836e159ff3dba3071048380f5261058e3a024960 Mon Sep 17 00:00:00 2001 From: "holyfoot/hf@mysql.com/deer.(none)" <> Date: Tue, 24 Oct 2006 12:35:32 +0500 Subject: [PATCH 03/10] merging fix --- client/mysqltest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/client/mysqltest.c b/client/mysqltest.c index 6889ae1a84c..3294612f7cc 100644 --- a/client/mysqltest.c +++ b/client/mysqltest.c @@ -1907,7 +1907,7 @@ int close_connection(struct st_query *q) #ifndef EMBEDDED_LIBRARY if (q->type == Q_DIRTY_CLOSE) { - while (con->mysql.net.vio) + if (con->mysql.net.vio) { vio_delete(con->mysql.net.vio); con->mysql.net.vio = 0; @@ -2908,7 +2908,7 @@ static int run_query_normal(struct connection *cn, struct st_query* q, else if (flags & QUERY_REAP) { pthread_mutex_lock(&cn->mutex); - if (!cn->query_done) + while (!cn->query_done) pthread_cond_wait(&cn->cond, &cn->mutex); pthread_mutex_unlock(&cn->mutex); } From d0ef58b6a481134610640857ec54d0259f151669 Mon Sep 17 00:00:00 2001 From: "holyfoot/hf@mysql.com/deer.(none)" <> Date: Tue, 24 Oct 2006 17:19:02 +0500 Subject: [PATCH 04/10] Bug #23427 (incompatible ABI change) the incompatibility was caused by current_stmt member added to the MYSQL structure. It's possible to move it to THD structure instead which saves ABI --- include/mysql.h | 6 ------ libmysqld/lib_sql.cc | 10 +++++----- sql/sql_class.h | 6 ++++++ 3 files changed, 11 insertions(+), 11 deletions(-) diff --git a/include/mysql.h b/include/mysql.h index 143f6752c46..89e861864df 100644 --- a/include/mysql.h +++ b/include/mysql.h @@ -270,12 +270,6 @@ typedef struct st_mysql from mysql_stmt_close if close had to cancel result set of this object. */ my_bool *unbuffered_fetch_owner; - /* - In embedded server it points to the statement that is processed - in the current query. We store some results directly in statement - fields then. - */ - struct st_mysql_stmt *current_stmt; } MYSQL; typedef struct st_mysql_res { diff --git a/libmysqld/lib_sql.cc b/libmysqld/lib_sql.cc index 1a3e10f08a8..64bc37fb40d 100644 --- a/libmysqld/lib_sql.cc +++ b/libmysqld/lib_sql.cc @@ -94,7 +94,7 @@ emb_advanced_command(MYSQL *mysql, enum enum_server_command command, mysql->affected_rows= ~(my_ulonglong) 0; mysql->field_count= 0; net->last_errno= 0; - mysql->current_stmt= stmt; + thd->current_stmt= stmt; thd->store_globals(); // Fix if more than one connect /* @@ -644,8 +644,8 @@ bool Protocol::send_fields(List *list, uint flag) DBUG_RETURN(0); field_count= list->elements; - field_alloc= mysql->current_stmt ? &mysql->current_stmt->mem_root : - &mysql->field_alloc; + field_alloc= thd->current_stmt ? &thd->current_stmt->mem_root : + &mysql->field_alloc; if (!(client_field= mysql->fields= (MYSQL_FIELD *)alloc_root(field_alloc, sizeof(MYSQL_FIELD) * field_count))) @@ -751,8 +751,8 @@ bool Protocol_prep::write() { MYSQL *mysql= thd->mysql; - if (mysql->current_stmt) - data= &mysql->current_stmt->result; + if (thd->current_stmt) + data= &thd->current_stmt->result; else { if (!(data= (MYSQL_DATA*) my_malloc(sizeof(MYSQL_DATA), diff --git a/sql/sql_class.h b/sql/sql_class.h index cc90de2a6ea..ed161de55de 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -686,6 +686,12 @@ public: char *extra_data; ulong extra_length; String query_rest; + /* + In embedded server it points to the statement that is processed + in the current query. We store some results directly in statement + fields then. + */ + struct st_mysql_stmt *current_stmt; #endif NET net; // client connection descriptor MEM_ROOT warn_root; // For warnings and errors From 77acba320d5d95bea1956e232d36cb438496a346 Mon Sep 17 00:00:00 2001 From: "gkodinov/kgeorge@macbook.gmz" <> Date: Fri, 3 Nov 2006 18:48:16 +0200 Subject: [PATCH 05/10] Bug #22457: Column alias in ORDER BY works, but not if in an expression The parser is allocating Item_field for references by name in ORDER BY expressions. Such expressions however may point not only to Item_field in the select list (or to a table column) but also to an arbitrary Item. This causes Item_field::fix_fields to throw an error about missing column. The fix substitutes Item_field for the reference with an Item_ref when not pointing to Item_field. --- mysql-test/r/order_by.result | 27 +++++++++++++++++++++++++++ mysql-test/t/order_by.test | 16 ++++++++++++++++ sql/item.cc | 33 ++++++++++++++++++++++++++++++--- 3 files changed, 73 insertions(+), 3 deletions(-) diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result index 8126e223f55..320bb89b62e 100644 --- a/mysql-test/r/order_by.result +++ b/mysql-test/r/order_by.result @@ -820,3 +820,30 @@ b a 20 1 10 2 DROP TABLE t1; +CREATE TABLE t1 (a INT); +INSERT INTO t1 VALUES (1),(2); +SELECT a + 1 AS num FROM t1 ORDER BY 30 - num; +num +3 +2 +SELECT CONCAT('test', a) AS str FROM t1 ORDER BY UPPER(str); +str +test1 +test2 +SELECT a + 1 AS num FROM t1 GROUP BY 30 - num; +num +3 +2 +SELECT a + 1 AS num FROM t1 HAVING 30 - num; +num +2 +3 +SELECT a + 1 AS num, num + 1 FROM t1; +ERROR 42S22: Unknown column 'num' in 'field list' +SELECT a + 1 AS num, (select num + 2 FROM t1 LIMIT 1) FROM t1; +num (select num + 2 FROM t1 LIMIT 1) +2 4 +3 5 +SELECT a.a + 1 AS num FROM t1 a JOIN t1 b ON num = b.a; +ERROR 42S22: Unknown column 'num' in 'on clause' +DROP TABLE t1; diff --git a/mysql-test/t/order_by.test b/mysql-test/t/order_by.test index 1664afc70f9..a8024be7032 100644 --- a/mysql-test/t/order_by.test +++ b/mysql-test/t/order_by.test @@ -559,4 +559,20 @@ INSERT INTO t1 VALUES (1,30), (2,20), (1,10), (2,30), (1,20), (2,10); DROP TABLE t1; +# +# Bug #22457: Column alias in ORDER BY works, but not if in an expression +# + +CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1),(2); +SELECT a + 1 AS num FROM t1 ORDER BY 30 - num; +SELECT CONCAT('test', a) AS str FROM t1 ORDER BY UPPER(str); +SELECT a + 1 AS num FROM t1 GROUP BY 30 - num; +SELECT a + 1 AS num FROM t1 HAVING 30 - num; +--error 1054 +SELECT a + 1 AS num, num + 1 FROM t1; +SELECT a + 1 AS num, (select num + 2 FROM t1 LIMIT 1) FROM t1; +--error 1054 +SELECT a.a + 1 AS num FROM t1 a JOIN t1 b ON num = b.a; +DROP TABLE t1; + # End of 4.1 tests diff --git a/sql/item.cc b/sql/item.cc index 94f0a24fcc3..45d7856b2c1 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -1761,10 +1761,37 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref) Item** res= find_item_in_list(this, thd->lex->current_select->item_list, &counter, REPORT_EXCEPT_NOT_FOUND, ¬_used); - if (res != (Item **)not_found_item && (*res)->type() == Item::FIELD_ITEM) + if (res != (Item **)not_found_item) { - set_field((*((Item_field**)res))->field); - return 0; + if ((*res)->type() == Item::FIELD_ITEM) + { + /* + It's an Item_field referencing another Item_field in the select + list. + use the field from the Item_field in the select list and leave + the Item_field instance in place. + */ + set_field((*((Item_field**)res))->field); + return 0; + } + else + { + /* + It's not an Item_field in the select list so we must make a new + Item_ref to point to the Item in the select list and replace the + Item_field created by the parser with the new Item_ref. + */ + Item_ref *rf= new Item_ref(db_name,table_name,field_name); + if (!rf) + return 1; + thd->change_item_tree(ref, rf); + /* + Because Item_ref never substitutes itself with other items + in Item_ref::fix_fields(), we can safely use the original + pointer to it even after fix_fields() + */ + return rf->fix_fields(thd, tables, ref) || rf->check_cols(1); + } } } From cf1ca923fc4bdff10dcd539a4d3b521fdfba8a12 Mon Sep 17 00:00:00 2001 From: "gkodinov/kgeorge@macbook.gmz" <> Date: Tue, 7 Nov 2006 18:16:17 +0200 Subject: [PATCH 06/10] Bug #11032: getObject() returns a String for a sub-query of type datetime - When returning metadata for scalar subqueries the actual type of the column was calculated based on the value type, which limits the actual type of a scalar subselect to the set of (currently) 3 basic types : integer, double precision or string. This is the reason that columns of types other then the basic ones (e.g. date/time) are reported as being of the corresponding basic type. Fixed by storing/returning information for the column type in addition to the result type. --- mysql-test/r/subselect.result | 17 +++++++++++++++++ mysql-test/t/subselect.test | 16 ++++++++++++++++ sql/item_subselect.cc | 34 ++++++++++++++++++++++++---------- sql/item_subselect.h | 7 +++++++ 4 files changed, 64 insertions(+), 10 deletions(-) diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 28fbfc86657..a3d1bafcb0d 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -2997,3 +2997,20 @@ a a IN (SELECT a FROM t1) 2 NULL 3 1 DROP TABLE t1,t2; +CREATE TABLE t1 (a DATETIME); +INSERT INTO t1 VALUES ('1998-09-23'), ('2003-03-25'); +CREATE TABLE t2 AS SELECT +(SELECT a FROM t1 WHERE a < '2000-01-01') AS sub_a +FROM t1 WHERE a > '2000-01-01'; +SHOW CREATE TABLE t2; +Table Create Table +t2 CREATE TABLE `t2` ( + `sub_a` datetime default NULL +) ENGINE=MyISAM DEFAULT CHARSET=latin1 +CREATE TABLE t3 AS (SELECT a FROM t1 WHERE a < '2000-01-01') UNION (SELECT a FROM t1 WHERE a > '2000-01-01'); +SHOW CREATE TABLE t3; +Table Create Table +t3 CREATE TABLE `t3` ( + `a` datetime default NULL +) ENGINE=MyISAM DEFAULT CHARSET=latin1 +DROP TABLE t1,t2,t3; diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index ac035c72d18..11b7fcc4d8f 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -1965,4 +1965,20 @@ SELECT a, a IN (SELECT a FROM t1) FROM t2; DROP TABLE t1,t2; +# +# Bug #11302: getObject() returns a String for a sub-query of type datetime +# +CREATE TABLE t1 (a DATETIME); +INSERT INTO t1 VALUES ('1998-09-23'), ('2003-03-25'); + +CREATE TABLE t2 AS SELECT + (SELECT a FROM t1 WHERE a < '2000-01-01') AS sub_a + FROM t1 WHERE a > '2000-01-01'; +SHOW CREATE TABLE t2; + +CREATE TABLE t3 AS (SELECT a FROM t1 WHERE a < '2000-01-01') UNION (SELECT a FROM t1 WHERE a > '2000-01-01'); +SHOW CREATE TABLE t3; + +DROP TABLE t1,t2,t3; + # End of 4.1 tests diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 1ab81d1862d..cd1f8f83821 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -391,6 +391,15 @@ enum Item_result Item_singlerow_subselect::result_type() const return engine->type(); } +/* + Don't rely on the result type to calculate field type. + Ask the engine instead. +*/ +enum_field_types Item_singlerow_subselect::field_type() const +{ + return engine->field_type(); +} + void Item_singlerow_subselect::fix_length_and_dec() { if ((max_columns= engine->cols()) == 1) @@ -1357,31 +1366,35 @@ int subselect_uniquesubquery_engine::prepare() return 1; } -static Item_result set_row(List &item_list, Item *item, - Item_cache **row, bool *maybe_null) +/* + makes storage for the output values for the subquery and calcuates + their data and column types and their nullability. +*/ +void subselect_engine::set_row(List &item_list, Item_cache **row) { - Item_result res_type= STRING_RESULT; Item *sel_item; List_iterator_fast li(item_list); + res_type= STRING_RESULT; + res_field_type= FIELD_TYPE_VAR_STRING; for (uint i= 0; (sel_item= li++); i++) { item->max_length= sel_item->max_length; res_type= sel_item->result_type(); + res_field_type= sel_item->field_type(); item->decimals= sel_item->decimals; - *maybe_null= sel_item->maybe_null; + maybe_null= sel_item->maybe_null; if (!(row[i]= Item_cache::get_cache(res_type))) - return STRING_RESULT; // we should return something + return; row[i]->setup(sel_item); } if (item_list.elements > 1) res_type= ROW_RESULT; - return res_type; } void subselect_single_select_engine::fix_length_and_dec(Item_cache **row) { DBUG_ASSERT(row || select_lex->item_list.elements==1); - res_type= set_row(select_lex->item_list, item, row, &maybe_null); + set_row(select_lex->item_list, row); item->collation.set(row[0]->collation); if (cols() != 1) maybe_null= 0; @@ -1393,13 +1406,14 @@ void subselect_union_engine::fix_length_and_dec(Item_cache **row) if (unit->first_select()->item_list.elements == 1) { - res_type= set_row(unit->types, item, row, &maybe_null); + set_row(unit->types, row); item->collation.set(row[0]->collation); } else { - bool fake= 0; - res_type= set_row(unit->types, item, row, &fake); + bool maybe_null_saved= maybe_null; + set_row(unit->types, row); + maybe_null= maybe_null_saved; } } diff --git a/sql/item_subselect.h b/sql/item_subselect.h index 93171ad64a1..7b064bfe92c 100644 --- a/sql/item_subselect.h +++ b/sql/item_subselect.h @@ -142,6 +142,7 @@ public: longlong val_int (); String *val_str (String *); enum Item_result result_type() const; + enum_field_types field_type() const; void fix_length_and_dec(); uint cols(); @@ -273,6 +274,7 @@ protected: THD *thd; /* pointer to current THD */ Item_subselect *item; /* item, that use this engine */ enum Item_result res_type; /* type of results */ + enum_field_types res_field_type; /* column type of the results */ bool maybe_null; /* may be null (first item in select) */ public: @@ -282,6 +284,7 @@ public: result= res; item= si; res_type= STRING_RESULT; + res_field_type= FIELD_TYPE_VAR_STRING; maybe_null= 0; } virtual ~subselect_engine() {}; // to satisfy compiler @@ -296,6 +299,7 @@ public: virtual uint cols()= 0; /* return number of columnss in select */ virtual uint8 uncacheable()= 0; /* query is uncacheable */ enum Item_result type() { return res_type; } + enum_field_types field_type() { return res_field_type; } virtual void exclude()= 0; bool may_be_null() { return maybe_null; }; virtual table_map upper_select_const_tables()= 0; @@ -303,6 +307,9 @@ public: virtual void print(String *str)= 0; virtual int change_item(Item_subselect *si, select_subselect *result)= 0; virtual bool no_tables()= 0; + +protected: + void set_row(List &item_list, Item_cache **row); }; From c7866bd569ccb0221c91ee206e4566876162f16f Mon Sep 17 00:00:00 2001 From: "gkodinov/kgeorge@macbook.gmz" <> Date: Wed, 8 Nov 2006 15:15:56 +0200 Subject: [PATCH 07/10] Make a new test target for autopush.pl to run memory based tests --- Makefile.am | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Makefile.am b/Makefile.am index 2aefbd05283..48f84269313 100644 --- a/Makefile.am +++ b/Makefile.am @@ -124,3 +124,10 @@ test-force-pl: cd mysql-test; \ ./mysql-test-run.pl --force && \ ./mysql-test-run.pl --ps-protocol --force + +#used by autopush.pl to run memory based tests +test-force-mem: + cd mysql-test; \ + ./mysql-test-run.pl --force --mem && \ + ./mysql-test-run.pl --ps-protocol --force --mem + From 9a41822bdd1486f2076302b6b1c6d88d66528583 Mon Sep 17 00:00:00 2001 From: "gkodinov/kgeorge@macbook.gmz" <> Date: Mon, 13 Nov 2006 12:28:55 +0200 Subject: [PATCH 08/10] Bug #19216: Client crashes on long SELECT The server sends a number of columns to the client. It uses a limited "fast" function for that instead of the general one. This fast function cannot send numbers larger than 2 bytes. This causes the client to expect smaller number of columns. The client writes outside of the allocated memory buffer as a result. Fixed the server to use the general function to send column count. Fixed the client to check the column count before writing column data. --- mysql-test/t/mysql_client.test | 18 ++++++++++++++++++ sql-common/client.c | 2 ++ sql/protocol.cc | 18 +++++++++--------- sql/protocol.h | 1 - 4 files changed, 29 insertions(+), 10 deletions(-) diff --git a/mysql-test/t/mysql_client.test b/mysql-test/t/mysql_client.test index b382357dacf..7bd7c762c5c 100644 --- a/mysql-test/t/mysql_client.test +++ b/mysql-test/t/mysql_client.test @@ -33,3 +33,21 @@ # --exec echo 'help' | $MYSQL > $MYSQLTEST_VARDIR/tmp/bug20328.tmp --exec echo 'help ' | $MYSQL > $MYSQLTEST_VARDIR/tmp/bug20328.tmp + +# +# Bug #19216: Client crashes on long SELECT +# +--exec echo "select" > $MYSQLTEST_VARDIR/tmp/b19216.tmp +# 3400 * 20 makes 68000 columns that is more than the max number that can fit +# in a 16 bit number. +let $i= 3400; +while ($i) +{ + --exec echo "'a','a','a','a','a','a','a','a','a','a','a','a','a','a','a','a','a','a','a','a'," >> $MYSQLTEST_VARDIR/tmp/b19216.tmp + dec $i; +} + +--exec echo "'b';" >> $MYSQLTEST_VARDIR/tmp/b19216.tmp +--disable_query_log +--exec $MYSQL < $MYSQLTEST_VARDIR/tmp/b19216.tmp >/dev/null +--enable_query_log diff --git a/sql-common/client.c b/sql-common/client.c index ff5f1ef150a..fb32eea33c7 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1173,6 +1173,8 @@ unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, for (row=data->data; row ; row = row->next,field++) { uchar *pos; + /* fields count may be wrong */ + DBUG_ASSERT ((field - result) < fields); cli_fetch_lengths(&lengths[0], row->data, default_value ? 8 : 7); field->catalog = strdup_root(alloc,(char*) row->data[0]); field->db = strdup_root(alloc,(char*) row->data[1]); diff --git a/sql/protocol.cc b/sql/protocol.cc index a2287740f1e..7c7dfaf7bef 100644 --- a/sql/protocol.cc +++ b/sql/protocol.cc @@ -43,7 +43,7 @@ bool Protocol_prep::net_store_data(const char *from, uint length) packet->realloc(packet_length+9+length)) return 1; char *to=(char*) net_store_length((char*) packet->ptr()+packet_length, - (ulonglong) length); + length); memcpy(to,from,length); packet->length((uint) (to+length-packet->ptr())); return 0; @@ -297,8 +297,8 @@ send_ok(THD *thd, ha_rows affected_rows, ulonglong id, const char *message) DBUG_VOID_RETURN; buff[0]=0; // No fields - pos=net_store_length(buff+1,(ulonglong) affected_rows); - pos=net_store_length(pos, (ulonglong) id); + pos=net_store_length(buff+1,affected_rows); + pos=net_store_length(pos, id); if (thd->client_capabilities & CLIENT_PROTOCOL_41) { DBUG_PRINT("info", @@ -416,7 +416,7 @@ bool send_old_password_request(THD *thd) ulonglong for bigger numbers. */ -char *net_store_length(char *pkg, uint length) +static char *net_store_length_fast(char *pkg, uint length) { uchar *packet=(uchar*) pkg; if (length < 251) @@ -439,7 +439,7 @@ char *net_store_length(char *pkg, uint length) char *net_store_data(char *to,const char *from, uint length) { - to=net_store_length(to,length); + to=net_store_length_fast(to,length); memcpy(to,from,length); return to+length; } @@ -448,7 +448,7 @@ char *net_store_data(char *to,int32 from) { char buff[20]; uint length=(uint) (int10_to_str(from,buff,10)-buff); - to=net_store_length(to,length); + to=net_store_length_fast(to,length); memcpy(to,buff,length); return to+length; } @@ -457,7 +457,7 @@ char *net_store_data(char *to,longlong from) { char buff[22]; uint length=(uint) (longlong10_to_str(from,buff,10)-buff); - to=net_store_length(to,length); + to=net_store_length_fast(to,length); memcpy(to,buff,length); return to+length; } @@ -520,7 +520,7 @@ bool Protocol::send_fields(List *list, uint flag) if (flag & 1) { // Packet with number of elements - char *pos=net_store_length(buff, (uint) list->elements); + char *pos=net_store_length(buff, list->elements); (void) my_net_write(&thd->net, buff,(uint) (pos-buff)); } @@ -648,7 +648,7 @@ bool Protocol::send_records_num(List *list, ulonglong records) { char *pos; char buff[20]; - pos=net_store_length(buff, (uint) list->elements); + pos=net_store_length(buff, list->elements); pos=net_store_length(pos, records); return my_net_write(&thd->net, buff,(uint) (pos-buff)); } diff --git a/sql/protocol.h b/sql/protocol.h index 32d6acccddf..ce3adb41df5 100644 --- a/sql/protocol.h +++ b/sql/protocol.h @@ -177,7 +177,6 @@ void send_ok(THD *thd, ha_rows affected_rows=0L, ulonglong id=0L, const char *info=0); void send_eof(THD *thd, bool no_flush=0); bool send_old_password_request(THD *thd); -char *net_store_length(char *packet,uint length); char *net_store_data(char *to,const char *from, uint length); char *net_store_data(char *to,int32 from); char *net_store_data(char *to,longlong from); From 2963d8ddd2fcda1c014acd3d66b1870366fbf831 Mon Sep 17 00:00:00 2001 From: "holyfoot/hf@mysql.com/deer.(none)" <> Date: Thu, 16 Nov 2006 21:23:34 +0400 Subject: [PATCH 09/10] merging --- client/mysqltest.c | 33 ++++++++++++++------------------- 1 file changed, 14 insertions(+), 19 deletions(-) diff --git a/client/mysqltest.c b/client/mysqltest.c index f2f2dc85d72..b73ee831cf3 100644 --- a/client/mysqltest.c +++ b/client/mysqltest.c @@ -183,18 +183,6 @@ DYNAMIC_ARRAY q_lines; #include "sslopt-vars.h" -struct connection -{ - MYSQL mysql; - char *name; - - const char *cur_query; - int cur_query_len; - pthread_mutex_t mutex; - pthread_cond_t cond; - int query_done; -}; - struct { int read_lines,current_line; @@ -234,6 +222,12 @@ struct st_connection MYSQL* util_mysql; char *name; MYSQL_STMT* stmt; + + const char *cur_query; + int cur_query_len; + pthread_mutex_t mutex; + pthread_cond_t cond; + int query_done; }; struct st_connection connections[128]; struct st_connection* cur_con, *next_con, *connections_end; @@ -493,7 +487,7 @@ void handle_no_error(struct st_command*); */ pthread_handler_decl(send_one_query, arg) { - struct connection *cn= (struct connection*)arg; + struct st_connection *cn= (struct st_connection*)arg; mysql_thread_init(); VOID(mysql_send_query(&cn->mysql, cn->cur_query, cn->cur_query_len)); @@ -507,7 +501,7 @@ pthread_handler_decl(send_one_query, arg) return 0; } -static int do_send_query(struct connection *cn, const char *q, int q_len, +static int do_send_query(struct st_connection *cn, const char *q, int q_len, int flags) { pthread_t tid; @@ -4570,7 +4564,7 @@ int append_warnings(DYNAMIC_STRING *ds, MYSQL* mysql) error - function will not return */ -void run_query_normal(struct connection *cn, *mysql, struct st_command *command, +void run_query_normal(struct st_connection *cn, struct st_command *command, int flags, char *query, int query_len, DYNAMIC_STRING *ds, DYNAMIC_STRING *ds_warnings) { @@ -4598,7 +4592,7 @@ void run_query_normal(struct connection *cn, *mysql, struct st_command *command, Here we handle 'reap' command, so we need to check if the query's thread was finished and probably wait */ - else if (flags & QUERY_REAP) + else if (flags & QUERY_REAP_FLAG) { pthread_mutex_lock(&cn->mutex); while (!cn->query_done) @@ -5096,8 +5090,9 @@ int util_query(MYSQL* org_mysql, const char* query){ */ -void run_query(MYSQL *mysql, struct st_command *command, int flags) +void run_query(struct st_connection *cn, struct st_command *command, int flags) { + MYSQL *mysql= &cn->mysql; DYNAMIC_STRING *ds; DYNAMIC_STRING ds_result; DYNAMIC_STRING ds_warnings; @@ -5254,7 +5249,7 @@ void run_query(MYSQL *mysql, struct st_command *command, int flags) match_re(&ps_re, query)) run_query_stmt(mysql, command, query, query_len, ds, &ds_warnings); else - run_query_normal(mysql, command, flags, query, query_len, + run_query_normal(cn, command, flags, query, query_len, ds, &ds_warnings); if (sp_created) @@ -5746,7 +5741,7 @@ int main(int argc, char **argv) strmake(command->require_file, save_file, sizeof(save_file)); save_file[0]= 0; } - run_query(cur, command, flags); + run_query(cur_con, command, flags); command_executed++; command->last_argument= command->end; break; From e7cde7265138dcb6ded0a1309e331a52baaf44e5 Mon Sep 17 00:00:00 2001 From: "holyfoot/hf@mysql.com/deer.(none)" <> Date: Thu, 16 Nov 2006 23:00:48 +0400 Subject: [PATCH 10/10] merging --- Makefile.am | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile.am b/Makefile.am index 48f84269313..12a867c1ad7 100644 --- a/Makefile.am +++ b/Makefile.am @@ -126,7 +126,7 @@ test-force-pl: ./mysql-test-run.pl --ps-protocol --force #used by autopush.pl to run memory based tests -test-force-mem: +test-force-pl-mem: cd mysql-test; \ ./mysql-test-run.pl --force --mem && \ ./mysql-test-run.pl --ps-protocol --force --mem