Valgrind warnings (Conditional jump or move depends on uninitialised value) in Field_datetime::get_date on GREATEST(..) IS NULL

CREATE TABLE t1 (dt DATETIME NOT NULL) ENGINE=InnoDB;

# INSERT is unimportant, it just shows that the table doesn't have to be empty

INSERT INTO t1 VALUES (NOW()),(NOW());

SELECT * FROM t1 WHERE GREATEST( dt, '2012-12-21 12:12:12' ) IS NULL;

==22755== Thread 5:

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x6444B9: Field_datetime::get_date(st_mysql_time*, unsigned int) (field.cc:5928)

==22755==    by 0x58234F: Item_field::get_date(st_mysql_time*, unsigned int) (item.cc:2347)

==22755==    by 0x5CBB96: get_datetime_value(THD*, Item***, Item**, Item*, bool*) (item_cmpfunc.cc:891)

==22755==    by 0x5B7BC9: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2459)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x6444D4: Field_datetime::get_date(st_mysql_time*, unsigned int) (field.cc:5930)

==22755==    by 0x58234F: Item_field::get_date(st_mysql_time*, unsigned int) (item.cc:2347)

==22755==    by 0x5CBB96: get_datetime_value(THD*, Item***, Item**, Item*, bool*) (item_cmpfunc.cc:891)

==22755==    by 0x5B7BC9: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2459)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x6444DF: Field_datetime::get_date(st_mysql_time*, unsigned int) (field.cc:5930)

==22755==    by 0x58234F: Item_field::get_date(st_mysql_time*, unsigned int) (item.cc:2347)

==22755==    by 0x5CBB96: get_datetime_value(THD*, Item***, Item**, Item*, bool*) (item_cmpfunc.cc:891)

==22755==    by 0x5B7BC9: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2459)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x5B7C35: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2468)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755==    by 0x6990FC: mysql_parse(THD*, char*, unsigned int, char const**) (sql_parse.cc:6173)

==22755==    by 0x68ABE5: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1243)

==22755==    by 0x689E83: do_command(THD*) (sql_parse.cc:923)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x918686: unpack_time (my_time.c:1461)

==22755==    by 0x5B7C8D: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2471)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755==    by 0x6990FC: mysql_parse(THD*, char*, unsigned int, char const**) (sql_parse.cc:6173)

==22755==    by 0x68ABE5: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1243)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x7D61D3: non_zero_date(st_mysql_time const*) (mysql_priv.h:2564)

==22755==    by 0x7D6218: check_date(st_mysql_time const*, unsigned long long, int*) (mysql_priv.h:2569)

==22755==    by 0x7D68D6: check_date_with_warn(st_mysql_time const*, unsigned int, enum_mysql_timestamp_type) (time.cc:221)

==22755==    by 0x5B7CAD: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2475)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x915853: check_date (my_time.c:87)

==22755==    by 0x7D622F: check_date(st_mysql_time const*, unsigned long long, int*) (mysql_priv.h:2569)

==22755==    by 0x7D68D6: check_date_with_warn(st_mysql_time const*, unsigned int, enum_mysql_timestamp_type) (time.cc:221)

==22755==    by 0x5B7CAD: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2475)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x91586C: check_date (my_time.c:88)

==22755==    by 0x7D622F: check_date(st_mysql_time const*, unsigned long long, int*) (mysql_priv.h:2569)

==22755==    by 0x7D68D6: check_date_with_warn(st_mysql_time const*, unsigned int, enum_mysql_timestamp_type) (time.cc:221)

==22755==    by 0x5B7CAD: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2475)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Use of uninitialised value of size 8

==22755==    at 0x915881: check_date (my_time.c:89)

==22755==    by 0x7D622F: check_date(st_mysql_time const*, unsigned long long, int*) (mysql_priv.h:2569)

==22755==    by 0x7D68D6: check_date_with_warn(st_mysql_time const*, unsigned int, enum_mysql_timestamp_type) (time.cc:221)

==22755==    by 0x5B7CAD: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2475)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

==22755== Conditional jump or move depends on uninitialised value(s)

==22755==    at 0x91588D: check_date (my_time.c:89)

==22755==    by 0x7D622F: check_date(st_mysql_time const*, unsigned long long, int*) (mysql_priv.h:2569)

==22755==    by 0x7D68D6: check_date_with_warn(st_mysql_time const*, unsigned int, enum_mysql_timestamp_type) (time.cc:221)

==22755==    by 0x5B7CAD: Item_func_min_max::get_date(st_mysql_time*, unsigned int) (item_func.cc:2475)

==22755==    by 0x5B82B1: Item_func_min_max::val_int() (item_func.cc:2577)

==22755==    by 0x59873E: Item::update_null_value() (item.h:955)

==22755==    by 0x5C4B98: Item_func::is_null() (item_func.h:163)

==22755==    by 0x5D8076: Item_func_isnull::val_int() (item_cmpfunc.cc:4624)

==22755==    by 0x5AF299: eval_const_cond(Item*) (item_func.cc:63)

==22755==    by 0x72D886: remove_eq_conds(THD*, Item*, Item::cond_result*) (sql_select.cc:13362)

==22755==    by 0x72CCAC: optimize_cond(JOIN*, Item*, List<TABLE_LIST>*, bool, Item::cond_result*, COND_EQUAL**) (sql_select.cc:13129)

==22755==    by 0x70D411: JOIN::optimize() (sql_select.cc:1019)

==22755==    by 0x7147A6: mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) (sql_select.cc:2976)

==22755==    by 0x70B1E6: handle_select(THD*, st_lex*, select_result*, unsigned long) (sql_select.cc:288)

==22755==    by 0x696682: execute_sqlcom_select(THD*, TABLE_LIST*) (sql_parse.cc:5172)

==22755==    by 0x68D441: mysql_execute_command(THD*) (sql_parse.cc:2305)

revision-id: bar@mariadb.org-20130812124759-8cy7ot1s3ysgned2

revno: 3674

branch-nick: 5.3