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Bug#31633 Information schema = NULL queries crash the server

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added correct handling of NULL values for lookup fields
This commit is contained in:
gluh@mysql.com/eagle.(none) 2007-10-23 13:20:51 +05:00
parent 9e6091fcbc
commit ffea2073b1
3 changed files with 107 additions and 22 deletions
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40
mysql-test/r/information_schema.result
View file

@ -1564,4 +1564,44 @@ SELECT TABLE_COLLATION FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA='mysql' and TABLE_NAME= 'db';
TABLE_COLLATION
utf8_bin
select * from information_schema.columns where table_schema = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
select * from `information_schema`.`COLUMNS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_SCHEMA` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_NAME` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
select * from `information_schema`.`PARTITIONS` where `TABLE_SCHEMA` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PARTITION_NAME SUBPARTITION_NAME PARTITION_ORDINAL_POSITION SUBPARTITION_ORDINAL_POSITION PARTITION_METHOD SUBPARTITION_METHOD PARTITION_EXPRESSION SUBPARTITION_EXPRESSION PARTITION_DESCRIPTION TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE CREATE_TIME UPDATE_TIME CHECK_TIME CHECKSUM PARTITION_COMMENT NODEGROUP TABLESPACE_NAME
select * from `information_schema`.`PARTITIONS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PARTITION_NAME SUBPARTITION_NAME PARTITION_ORDINAL_POSITION SUBPARTITION_ORDINAL_POSITION PARTITION_METHOD SUBPARTITION_METHOD PARTITION_EXPRESSION SUBPARTITION_EXPRESSION PARTITION_DESCRIPTION TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE CREATE_TIME UPDATE_TIME CHECK_TIME CHECKSUM PARTITION_COMMENT NODEGROUP TABLESPACE_NAME
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `CONSTRAINT_SCHEMA` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG UNIQUE_CONSTRAINT_SCHEMA UNIQUE_CONSTRAINT_NAME MATCH_OPTION UPDATE_RULE DELETE_RULE TABLE_NAME REFERENCED_TABLE_NAME
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `TABLE_NAME` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG UNIQUE_CONSTRAINT_SCHEMA UNIQUE_CONSTRAINT_NAME MATCH_OPTION UPDATE_RULE DELETE_RULE TABLE_NAME REFERENCED_TABLE_NAME
select * from information_schema.schemata where schema_name = NULL;
CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
select * from `information_schema`.`STATISTICS` where `TABLE_SCHEMA` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLUMN_NAME COLLATION CARDINALITY SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT
select * from `information_schema`.`STATISTICS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLUMN_NAME COLLATION CARDINALITY SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT
select * from information_schema.tables where table_schema = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT
select * from information_schema.tables where table_catalog = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT
select * from information_schema.tables where table_name = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_SCHEMA` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_NAME` = NULL;
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
select * from `information_schema`.`TRIGGERS` where `EVENT_OBJECT_SCHEMA` = NULL;
TRIGGER_CATALOG TRIGGER_SCHEMA TRIGGER_NAME EVENT_MANIPULATION EVENT_OBJECT_CATALOG EVENT_OBJECT_SCHEMA EVENT_OBJECT_TABLE ACTION_ORDER ACTION_CONDITION ACTION_STATEMENT ACTION_ORIENTATION ACTION_TIMING ACTION_REFERENCE_OLD_TABLE ACTION_REFERENCE_NEW_TABLE ACTION_REFERENCE_OLD_ROW ACTION_REFERENCE_NEW_ROW CREATED SQL_MODE DEFINER CHARACTER_SET_CLIENT COLLATION_CONNECTION DATABASE_COLLATION
select * from `information_schema`.`TRIGGERS` where `EVENT_OBJECT_TABLE` = NULL;
TRIGGER_CATALOG TRIGGER_SCHEMA TRIGGER_NAME EVENT_MANIPULATION EVENT_OBJECT_CATALOG EVENT_OBJECT_SCHEMA EVENT_OBJECT_TABLE ACTION_ORDER ACTION_CONDITION ACTION_STATEMENT ACTION_ORIENTATION ACTION_TIMING ACTION_REFERENCE_OLD_TABLE ACTION_REFERENCE_NEW_TABLE ACTION_REFERENCE_OLD_ROW ACTION_REFERENCE_NEW_ROW CREATED SQL_MODE DEFINER CHARACTER_SET_CLIENT COLLATION_CONNECTION DATABASE_COLLATION
select * from `information_schema`.`VIEWS` where `TABLE_SCHEMA` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
select * from `information_schema`.`VIEWS` where `TABLE_NAME` = NULL;
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
End of 5.1 tests.

24
mysql-test/t/information_schema.test
View file

@ -1208,4 +1208,28 @@ WHERE SCHEMA_NAME ='information_schema';
SELECT TABLE_COLLATION FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA='mysql' and TABLE_NAME= 'db';
#
# Bug#31633 Information schema = NULL queries crash the server
#
select * from information_schema.columns where table_schema = NULL;
select * from `information_schema`.`COLUMNS` where `TABLE_NAME` = NULL;
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_SCHEMA` = NULL;
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_NAME` = NULL;
select * from `information_schema`.`PARTITIONS` where `TABLE_SCHEMA` = NULL;
select * from `information_schema`.`PARTITIONS` where `TABLE_NAME` = NULL;
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `CONSTRAINT_SCHEMA` = NULL;
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `TABLE_NAME` = NULL;
select * from information_schema.schemata where schema_name = NULL;
select * from `information_schema`.`STATISTICS` where `TABLE_SCHEMA` = NULL;
select * from `information_schema`.`STATISTICS` where `TABLE_NAME` = NULL;
select * from information_schema.tables where table_schema = NULL;
select * from information_schema.tables where table_catalog = NULL;
select * from information_schema.tables where table_name = NULL;
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_SCHEMA` = NULL;
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_NAME` = NULL;
select * from `information_schema`.`TRIGGERS` where `EVENT_OBJECT_SCHEMA` = NULL;
select * from `information_schema`.`TRIGGERS` where `EVENT_OBJECT_TABLE` = NULL;
select * from `information_schema`.`VIEWS` where `TABLE_SCHEMA` = NULL;
select * from `information_schema`.`VIEWS` where `TABLE_NAME` = NULL;
--echo End of 5.1 tests.

65
sql/sql_show.cc
View file

@ -2269,10 +2269,12 @@ int make_table_list(THD *thd, SELECT_LEX *sel,
@param[in] table I_S table
@param[in, out] lookup_field_vals Struct which holds lookup values
@return void
@return
0 success
1 error, there can be no matching records for the condition
*/
void get_lookup_value(THD *thd, Item_func *item_func,
bool get_lookup_value(THD *thd, Item_func *item_func,
TABLE_LIST *table,
LOOKUP_FIELD_VALUES *lookup_field_vals)
{
@ -2305,13 +2307,17 @@ void get_lookup_value(THD *thd, Item_func *item_func,
idx_val= 0;
}
else
return;
return 0;
item_field= (Item_field*) item_func->arguments()[idx_field];
if (table->table != item_field->field->table)
return;
return 0;
tmp_str= item_func->arguments()[idx_val]->val_str(&str_buff);
/* impossible value */
if (!tmp_str)
return 1;
/* Lookup value is database name */
if (!cs->coll->strnncollsp(cs, (uchar *) field_name1, strlen(field_name1),
(uchar *) item_field->field_name,
@ -2330,7 +2336,7 @@ void get_lookup_value(THD *thd, Item_func *item_func,
tmp_str->length(), FALSE);
}
}
return;
return 0;
}
@ -2346,14 +2352,16 @@ void get_lookup_value(THD *thd, Item_func *item_func,
@param[in] table I_S table
@param[in, out] lookup_field_vals Struct which holds lookup values
@return void
@return
0 success
1 error, there can be no matching records for the condition
*/
void calc_lookup_values_from_cond(THD *thd, COND *cond, TABLE_LIST *table,
bool calc_lookup_values_from_cond(THD *thd, COND *cond, TABLE_LIST *table,
LOOKUP_FIELD_VALUES *lookup_field_vals)
{
if (!cond)
return;
return 0;
if (cond->type() == Item::COND_ITEM)
{
@ -2364,16 +2372,23 @@ void calc_lookup_values_from_cond(THD *thd, COND *cond, TABLE_LIST *table,
while ((item= li++))
{
if (item->type() == Item::FUNC_ITEM)
get_lookup_value(thd, (Item_func*)item, table, lookup_field_vals);
{
if (get_lookup_value(thd, (Item_func*)item, table, lookup_field_vals))
return 1;
}
else
calc_lookup_values_from_cond(thd, item, table, lookup_field_vals);
{
if (calc_lookup_values_from_cond(thd, item, table, lookup_field_vals))
return 1;
}
}
}
return;
return 0;
}
else if (cond->type() == Item::FUNC_ITEM)
get_lookup_value(thd, (Item_func*) cond, table, lookup_field_vals);
return;
else if (cond->type() == Item::FUNC_ITEM &&
get_lookup_value(thd, (Item_func*) cond, table, lookup_field_vals))
return 1;
return 0;
}
@ -2486,10 +2501,12 @@ static COND * make_cond_for_info_schema(COND *cond, TABLE_LIST *table)
@param[in] tables I_S table
@param[in, out] lookup_field_values Struct which holds lookup values
@return void
@return
0 success
1 error, there can be no matching records for the condition
*/
void get_lookup_field_values(THD *thd, COND *cond, TABLE_LIST *tables,
bool get_lookup_field_values(THD *thd, COND *cond, TABLE_LIST *tables,
LOOKUP_FIELD_VALUES *lookup_field_values)
{
LEX *lex= thd->lex;
@ -2503,7 +2520,7 @@ void get_lookup_field_values(THD *thd, COND *cond, TABLE_LIST *tables,
lookup_field_values->db_value.length= strlen(wild);
lookup_field_values->wild_db_value= 1;
}
break;
return 0;
case SQLCOM_SHOW_TABLES:
case SQLCOM_SHOW_TABLE_STATUS:
case SQLCOM_SHOW_TRIGGERS:
@ -2516,14 +2533,13 @@ void get_lookup_field_values(THD *thd, COND *cond, TABLE_LIST *tables,
lookup_field_values->table_value.length= strlen(wild);
lookup_field_values->wild_table_value= 1;
}
break;
return 0;
default:
/*
The "default" is for queries over I_S.
All previous cases handle SHOW commands.
*/
calc_lookup_values_from_cond(thd, cond, tables, lookup_field_values);
break;
return calc_lookup_values_from_cond(thd, cond, tables, lookup_field_values);
}
}
@ -3113,7 +3129,11 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
}
schema_table_idx= get_schema_table_idx(schema_table);
get_lookup_field_values(thd, cond, tables, &lookup_field_vals);
if (get_lookup_field_values(thd, cond, tables, &lookup_field_vals))
{
error= 0;
goto err;
}
DBUG_PRINT("INDEX VALUES",("db_name='%s', table_name='%s'",
lookup_field_vals.db_value.str,
lookup_field_vals.table_value.str));
@ -3328,7 +3348,8 @@ int fill_schema_schemata(THD *thd, TABLE_LIST *tables, COND *cond)
#endif
DBUG_ENTER("fill_schema_shemata");
get_lookup_field_values(thd, cond, tables, &lookup_field_vals);
if (get_lookup_field_values(thd, cond, tables, &lookup_field_vals))
DBUG_RETURN(0);
DBUG_PRINT("INDEX VALUES",("db_name='%s', table_name='%s'",
lookup_field_vals.db_value.str,
lookup_field_vals.table_value.str));