mirror of
https://github.com/MariaDB/server.git
synced 2025-01-30 10:31:54 +01:00
72dd44b9de
Ensure that 'null_value' is not accessed before val() is called in FIELD() functions
Fixed initialization of key maps. This fixes some problems with keys when you have more than 64 keys
Fixed that ROLLUP don't always create a temporary table. This fix ensures that func_gconcat.test results are now predictable
mysql-test/r/func_gconcat.result:
Move innodb specific test to innodb.test
Changed table name r2 -> t2
More test to see how ROLLUP was optimized
mysql-test/r/innodb.result:
Moved test here form func_gconcat
mysql-test/r/olap.result:
New test results after optimization
mysql-test/t/func_gconcat.test:
Move innodb specific test to innodb.test
Changed table name r2 -> t2
More test to see how ROLLUP was optimized
mysql-test/t/innodb.test:
Moved test here form func_gconcat
sql/field.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_berkeley.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_blackhole.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_heap.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_innodb.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_isam.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_isammrg.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_myisam.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_myisammrg.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/ha_ndbcluster.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/handler.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/hash_filo.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_cmpfunc.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_func.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
Ensure that 'null_value' is not accessed before val() is called
sql/item_geofunc.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_strfunc.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_subselect.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_sum.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_timefunc.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/item_uniq.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/log_event.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/mysql_priv.h:
Change key_map_full to not be const as we are giving it a proper value on startup
sql/mysqld.cc:
Move key_map variables here and initialize key_map_full properly
sql/opt_range.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/opt_range.h:
Fix that test_quick_select() works with any ammount of keys
sql/procedure.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/protocol.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/protocol_cursor.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/set_var.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_analyse.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_class.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_crypt.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_insert.cc:
Fixed that max_rows is ulong
sql/sql_list.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_map.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_olap.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_select.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
Fixed that ROLLUP don't have to always create a temporary table
Added new argument to remove_const() to make above possible
Fixed some errors that creapt up when we don't always do a temporary table for ROLLUP
sql/sql_string.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_table.cc:
Simple optimizations
Fixed wrong checking of build_table_path() in undef-ed code
sql/sql_udf.cc:
Move USE_PRAGMA_IMPLEMENTATION to proper place
sql/sql_yacc.yy:
removed extra {}
495 lines
24 KiB
Text
495 lines
24 KiB
Text
drop table if exists t1, t2;
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create table t1 (grp int, a bigint unsigned, c char(10) not null, d char(10) not null);
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insert into t1 values (1,1,"a","a");
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insert into t1 values (2,2,"b","a");
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insert into t1 values (2,3,"c","b");
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insert into t1 values (3,4,"E","a");
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insert into t1 values (3,5,"C","b");
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insert into t1 values (3,6,"D","b");
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insert into t1 values (3,7,"d","d");
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insert into t1 values (3,8,"d","d");
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insert into t1 values (3,9,"D","c");
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select grp,group_concat(c) from t1 group by grp;
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grp group_concat(c)
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1 a
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2 b,c
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3 E,C,D,d,d,D
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explain extended select grp,group_concat(c) from t1 group by grp;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Using filesort
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Warnings:
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Note 1003 select test.t1.grp AS `grp`,group_concat(test.t1.c separator ',') AS `group_concat(c)` from test.t1 group by test.t1.grp
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select grp,group_concat(a,c) from t1 group by grp;
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grp group_concat(a,c)
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1 1a
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2 2b,3c
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3 4E,5C,6D,7d,8d,9D
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select grp,group_concat("(",a,":",c,")") from t1 group by grp;
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grp group_concat("(",a,":",c,")")
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1 (1:a)
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2 (2:b),(3:c)
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3 (4:E),(5:C),(6:D),(7:d),(8:d),(9:D)
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select grp,group_concat(c separator ",") from t1 group by grp;
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grp group_concat(c separator ",")
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1 a
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2 b,c
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3 E,C,D,d,d,D
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select grp,group_concat(c separator "---->") from t1 group by grp;
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grp group_concat(c separator "---->")
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1 a
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2 b---->c
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3 E---->C---->D---->d---->d---->D
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select grp,group_concat(c order by c) from t1 group by grp;
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grp group_concat(c order by c)
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(c order by c desc) from t1 group by grp;
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grp group_concat(c order by c desc)
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1 a
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2 c,b
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3 E,D,d,d,D,C
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select grp,group_concat(d order by a) from t1 group by grp;
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grp group_concat(d order by a)
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1 a
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2 a,b
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3 a,b,b,d,d,c
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select grp,group_concat(d order by a desc) from t1 group by grp;
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grp group_concat(d order by a desc)
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1 a
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2 b,a
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3 c,d,d,b,b,a
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select grp,group_concat(a order by a,d+c-ascii(c)-a) from t1 group by grp;
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grp group_concat(a order by a,d+c-ascii(c)-a)
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1 1
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2 2,3
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3 4,5,6,7,8,9
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select grp,group_concat(a order by d+c-ascii(c),a) from t1 group by grp;
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grp group_concat(a order by d+c-ascii(c),a)
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1 1
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2 3,2
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3 7,8,4,6,9,5
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select grp,group_concat(c order by 1) from t1 group by grp;
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grp group_concat(c order by 1)
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(c order by "c") from t1 group by grp;
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grp group_concat(c order by "c")
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(distinct c order by c) from t1 group by grp;
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grp group_concat(distinct c order by c)
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1 a
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2 b,c
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3 C,D,E
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select grp,group_concat(distinct c order by c desc) from t1 group by grp;
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grp group_concat(distinct c order by c desc)
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1 a
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2 c,b
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3 E,D,C
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explain extended select grp,group_concat(distinct c order by c desc) from t1 group by grp;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Using filesort
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Warnings:
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Note 1003 select test.t1.grp AS `grp`,group_concat(distinct test.t1.c order by test.t1.c separator ',') AS `group_concat(distinct c order by c desc)` from test.t1 group by test.t1.grp
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select grp,group_concat(c order by c separator ",") from t1 group by grp;
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grp group_concat(c order by c separator ",")
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1 a
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2 b,c
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3 C,D,d,d,D,E
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select grp,group_concat(c order by c desc separator ",") from t1 group by grp;
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grp group_concat(c order by c desc separator ",")
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1 a
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2 c,b
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3 E,D,d,d,D,C
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select grp,group_concat(distinct c order by c separator ",") from t1 group by grp;
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grp group_concat(distinct c order by c separator ",")
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1 a
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2 b,c
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3 C,D,E
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explain extended select grp,group_concat(distinct c order by c separator ",") from t1 group by grp;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Using filesort
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Warnings:
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Note 1003 select test.t1.grp AS `grp`,group_concat(distinct test.t1.c order by test.t1.c separator ',') AS `group_concat(distinct c order by c separator ",")` from test.t1 group by test.t1.grp
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select grp,group_concat(distinct c order by c desc separator ",") from t1 group by grp;
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grp group_concat(distinct c order by c desc separator ",")
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1 a
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2 c,b
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3 E,D,C
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select grp,group_concat(c order by grp desc) from t1 group by grp order by grp;
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grp group_concat(c order by grp desc)
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1 a
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2 c,b
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3 D,d,d,D,C,E
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select grp, group_concat(a separator "")+0 from t1 group by grp;
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grp group_concat(a separator "")+0
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1 1
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2 23
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3 456789
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select grp, group_concat(a separator "")+0.0 from t1 group by grp;
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grp group_concat(a separator "")+0.0
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1 1.0
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2 23.0
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3 456789.0
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select grp, ROUND(group_concat(a separator "")) from t1 group by grp;
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grp ROUND(group_concat(a separator ""))
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1 1
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2 23
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3 456789
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drop table t1;
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create table t1 (grp int, c char(10));
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insert into t1 values (1,NULL),(2,"b"),(2,NULL),(3,"E"),(3,NULL),(3,"D"),(3,NULL),(3,NULL),(3,"D"),(4,""),(5,NULL);
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select grp,group_concat(c order by c) from t1 group by grp;
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grp group_concat(c order by c)
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1 NULL
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2 b
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3 D,D,E
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4
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5 NULL
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set group_concat_max_len = 4;
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select grp,group_concat(c) from t1 group by grp;
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grp group_concat(c)
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1 NULL
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2 b
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3 D,D,
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4
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5 NULL
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Warnings:
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Warning 1260 1 line(s) were cut by GROUP_CONCAT()
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show warnings;
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Level Code Message
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Warning 1260 1 line(s) were cut by GROUP_CONCAT()
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set group_concat_max_len = 1024;
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select group_concat(sum(a)) from t1 group by grp;
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ERROR HY000: Invalid use of group function
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select grp,group_concat(c order by 2) from t1 group by grp;
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ERROR 42S22: Unknown column '2' in 'group statement'
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drop table t1;
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create table t1 ( URL_ID int(11), URL varchar(80));
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create table t2 ( REQ_ID int(11), URL_ID int(11));
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insert into t1 values (4,'www.host.com'), (5,'www.google.com'),(5,'www.help.com');
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insert into t2 values (1,4), (5,4), (5,5);
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select REQ_ID, Group_Concat(URL) as URL from t1, t2 where
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t2.URL_ID = t1.URL_ID group by REQ_ID;
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REQ_ID URL
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1 X
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5 X,X,X
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select REQ_ID, Group_Concat(URL) as URL, Min(t1.URL_ID) urll,
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Max(t1.URL_ID) urlg from t1, t2 where t2.URL_ID = t1.URL_ID group by REQ_ID;
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REQ_ID URL urll urlg
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1 X 4 4
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5 X,X,X 4 5
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drop table t1;
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drop table t2;
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create table t1 (id int, name varchar(16));
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insert into t1 values (1,'longername'),(1,'evenlongername');
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select ifnull(group_concat(concat(t1.id, ':', t1.name)), 'shortname') as 'without distinct: how it should be' from t1;
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without distinct: how it should be
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1:longername,1:evenlongername
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select distinct ifnull(group_concat(concat(t1.id, ':', t1.name)), 'shortname') as 'with distinct: cutoff at length of shortname' from t1;
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with distinct: cutoff at length of shortname
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1:longername,1:evenlongername
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drop table t1;
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create table t1(id int);
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create table t2(id int);
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insert into t1 values(0),(1);
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select group_concat(t1.id) FROM t1,t2;
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group_concat(t1.id)
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NULL
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drop table t1;
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drop table t2;
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create table t1 (bar varchar(32));
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insert into t1 values('test1'),('test2');
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select group_concat(bar order by concat(bar,bar)) from t1;
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group_concat(bar order by concat(bar,bar))
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test1,test2
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select group_concat(bar order by concat(bar,bar) desc) from t1;
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group_concat(bar order by concat(bar,bar) desc)
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test2,test1
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select bar from t1 having group_concat(bar)='';
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bar
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select bar from t1 having instr(group_concat(bar), "test") > 0;
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bar
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test1
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select bar from t1 having instr(group_concat(bar order by concat(bar,bar) desc), "test2,test1") > 0;
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bar
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test1
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drop table t1;
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create table t1 (a int, a1 varchar(10));
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create table t2 (a0 int);
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insert into t1 values (0,"a"),(0,"b"),(1,"c");
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insert into t2 values (1),(2),(3);
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select group_concat(a1 order by (t1.a IN (select a0 from t2))) from t1;
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group_concat(a1 order by (t1.a IN (select a0 from t2)))
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b,a,c
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select group_concat(a1 order by (t1.a)) from t1;
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group_concat(a1 order by (t1.a))
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b,a,c
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drop table t1, t2;
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CREATE TABLE t1 (id1 tinyint(4) NOT NULL, id2 tinyint(4) NOT NULL);
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INSERT INTO t1 VALUES (1, 1),(1, 2),(1, 3),(1, 4),(1, 5),(2, 1),(2, 2),(2, 3);
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CREATE TABLE t2 (id1 tinyint(4) NOT NULL);
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INSERT INTO t2 VALUES (1),(2),(3),(4),(5);
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SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 AND t1.id1=1 GROUP BY t1.id1;
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id1 concat_id
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1 1,2,3,4,5
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SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
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id1 concat_id
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1 1,2,3,4,5
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2 1,2,3
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SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY t1.id2 DESC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
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id1 concat_id
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1 5,4,3,2,1
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2 3,2,1
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SELECT t1.id1, GROUP_CONCAT(t1.id2 ORDER BY 6-t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
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id1 concat_id
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1 5,4,3,2,1
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2 3,2,1
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SELECT t1.id1, GROUP_CONCAT(t1.id2,6-t1.id2 ORDER BY 6-t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
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id1 concat_id
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1 51,42,33,24,15
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2 33,24,15
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SELECT t1.id1, GROUP_CONCAT(t1.id2,6-t1.id2 ORDER BY 6-t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
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id1 concat_id
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1 51,42,33,24,15
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2 33,24,15
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SELECT t1.id1, GROUP_CONCAT(t1.id2,"/",6-t1.id2 ORDER BY 1+0,6-t1.id2,t1.id2 ASC) AS concat_id FROM t1, t2 WHERE t1.id1 = t2.id1 GROUP BY t1.id1;
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id1 concat_id
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1 5/1,4/2,3/3,2/4,1/5
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2 3/3,2/4,1/5
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drop table t1,t2;
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create table t1 (s1 char(10), s2 int not null);
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insert into t1 values ('a',2),('b',2),('c',1),('a',3),('b',4),('c',4);
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select distinct s1 from t1 order by s2,s1;
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s1
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c
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a
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b
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select group_concat(distinct s1) from t1;
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group_concat(distinct s1)
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a,b,c
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select group_concat(distinct s1 order by s2) from t1 where s2 < 4;
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group_concat(distinct s1 order by s2)
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c,b,a
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select group_concat(distinct s1 order by s2) from t1;
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group_concat(distinct s1 order by s2)
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c,b,a,c
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drop table t1;
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create table t1 (a int, c int);
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insert into t1 values (1, 2), (2, 3), (2, 4), (3, 5);
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create table t2 (a int, c int);
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insert into t2 values (1, 5), (2, 4), (3, 3), (3,3);
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select group_concat(c) from t1;
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group_concat(c)
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2,3,4,5
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select group_concat(c order by (select c from t2 where t2.a=t1.a limit 1)) as grp from t1;
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grp
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5,4,3,2
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select group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a)) as grp from t1;
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grp
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5,4,3,2
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select group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a) desc) as grp from t1;
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grp
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2,4,3,5
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select t1.a, group_concat(c order by (select c from t2 where t2.a=t1.a limit 1)) as grp from t1 group by 1;
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a grp
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1 2
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2 4,3
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3 5
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select t1.a, group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a)) as grp from t1 group by 1;
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a grp
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1 2
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2 4,3
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3 5
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select t1.a, group_concat(c order by (select mid(group_concat(c order by a),1,5) from t2 where t2.a=t1.a) desc) as grp from t1 group by 1;
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a grp
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1 2
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2 4,3
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3 5
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select a,c,(select group_concat(c order by a) from t2 where a=t1.a) as grp from t1 order by grp;
|
|
a c grp
|
|
3 5 3,3
|
|
2 3 4
|
|
2 4 4
|
|
1 2 5
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 ( a int );
|
|
CREATE TABLE t2 ( a int );
|
|
INSERT INTO t1 VALUES (1), (2);
|
|
INSERT INTO t2 VALUES (1), (2);
|
|
SELECT GROUP_CONCAT(t1.a*t2.a ORDER BY t2.a) FROM t1, t2 GROUP BY t1.a;
|
|
GROUP_CONCAT(t1.a*t2.a ORDER BY t2.a)
|
|
1,2
|
|
2,4
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t1 (a char(4));
|
|
INSERT INTO t1 VALUES ('John'), ('Anna'), ('Bill');
|
|
SELECT GROUP_CONCAT(a SEPARATOR '||') AS names FROM t1
|
|
HAVING names LIKE '%An%';
|
|
names
|
|
John||Anna||Bill
|
|
SELECT GROUP_CONCAT(a SEPARATOR '###') AS names FROM t1
|
|
HAVING LEFT(names, 1) ='J';
|
|
names
|
|
John###Anna###Bill
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 ( a int, b TEXT );
|
|
INSERT INTO t1 VALUES (1,'First Row'), (2,'Second Row');
|
|
SELECT GROUP_CONCAT(b ORDER BY b) FROM t1 GROUP BY a;
|
|
GROUP_CONCAT(b ORDER BY b)
|
|
First Row
|
|
Second Row
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (A_ID INT NOT NULL,A_DESC CHAR(3) NOT NULL,PRIMARY KEY (A_ID));
|
|
INSERT INTO t1 VALUES (1,'ABC'), (2,'EFG'), (3,'HIJ');
|
|
CREATE TABLE t2 (A_ID INT NOT NULL,B_DESC CHAR(3) NOT NULL,PRIMARY KEY (A_ID,B_DESC));
|
|
INSERT INTO t2 VALUES (1,'A'),(1,'B'),(3,'F');
|
|
SELECT t1.A_ID, GROUP_CONCAT(t2.B_DESC) AS B_DESC FROM t1 LEFT JOIN t2 ON t1.A_ID=t2.A_ID GROUP BY t1.A_ID ORDER BY t1.A_DESC;
|
|
A_ID B_DESC
|
|
1 A,B
|
|
2 NULL
|
|
3 F
|
|
DROP TABLE t1;
|
|
DROP TABLE t2;
|
|
create table t1 (a int, b text);
|
|
insert into t1 values (1, 'bb'), (1, 'ccc'), (1, 'a'), (1, 'bb'), (1, 'ccc');
|
|
insert into t1 values (2, 'BB'), (2, 'CCC'), (2, 'A'), (2, 'BB'), (2, 'CCC');
|
|
select group_concat(b) from t1 group by a;
|
|
group_concat(b)
|
|
bb,ccc,a,bb,ccc
|
|
BB,CCC,A,BB,CCC
|
|
select group_concat(distinct b) from t1 group by a;
|
|
group_concat(distinct b)
|
|
bb,ccc,a
|
|
BB,CCC,A
|
|
select group_concat(b order by b) from t1 group by a;
|
|
group_concat(b order by b)
|
|
a,bb,bb,ccc,ccc
|
|
A,BB,BB,CCC,CCC
|
|
select group_concat(distinct b order by b) from t1 group by a;
|
|
group_concat(distinct b order by b)
|
|
a,bb,ccc
|
|
A,BB,CCC
|
|
set local group_concat_max_len=4;
|
|
select group_concat(b) from t1 group by a;
|
|
group_concat(b)
|
|
bb,c
|
|
BB,C
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
select group_concat(distinct b) from t1 group by a;
|
|
group_concat(distinct b)
|
|
bb,c
|
|
BB,C
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
select group_concat(b order by b) from t1 group by a;
|
|
group_concat(b order by b)
|
|
a,bb
|
|
A,BB
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
select group_concat(distinct b order by b) from t1 group by a;
|
|
group_concat(distinct b order by b)
|
|
a,bb
|
|
A,BB
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
insert into t1 values (1, concat(repeat('1', 300), '2')),
|
|
(1, concat(repeat('1', 300), '2')), (1, concat(repeat('0', 300), '1')),
|
|
(2, concat(repeat('1', 300), '2')), (2, concat(repeat('1', 300), '2')),
|
|
(2, concat(repeat('0', 300), '1'));
|
|
set local group_concat_max_len=1024;
|
|
select group_concat(b) from t1 group by a;
|
|
group_concat(b)
|
|
bb,ccc,a,bb,ccc,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
|
|
BB,CCC,A,BB,CCC,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
|
|
select group_concat(distinct b) from t1 group by a;
|
|
group_concat(distinct b)
|
|
bb,ccc,a,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
|
|
BB,CCC,A,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
|
|
select group_concat(b order by b) from t1 group by a;
|
|
group_concat(b order by b)
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,a,bb,bb,ccc,ccc
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,A,BB,BB,CCC,CCC
|
|
select group_concat(distinct b order by b) from t1 group by a;
|
|
group_concat(distinct b order by b)
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,a,bb,ccc
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,A,BB,CCC
|
|
set local group_concat_max_len=400;
|
|
select group_concat(b) from t1 group by a;
|
|
group_concat(b)
|
|
bb,ccc,a,bb,ccc,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,1111111111111111111111111111111111111111111111111111111111111111111111111111111111
|
|
BB,CCC,A,BB,CCC,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,1111111111111111111111111111111111111111111111111111111111111111111111111111111111
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
select group_concat(distinct b) from t1 group by a;
|
|
group_concat(distinct b)
|
|
bb,ccc,a,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
|
|
BB,CCC,A,1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111112,00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
select group_concat(b order by b) from t1 group by a;
|
|
group_concat(b order by b)
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
select group_concat(distinct b order by b) from t1 group by a;
|
|
group_concat(distinct b order by b)
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
|
|
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001,11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
|
|
Warnings:
|
|
Warning 1260 2 line(s) were cut by GROUP_CONCAT()
|
|
drop table t1;
|
|
CREATE TABLE t1 (id int);
|
|
SELECT GROUP_CONCAT(id) AS gc FROM t1 HAVING gc IS NULL;
|
|
gc
|
|
NULL
|
|
DROP TABLE t1;
|
|
create table t2 (a int, b int);
|
|
insert into t2 values (1,1), (2,2);
|
|
select b x, (select group_concat(x) from t2) from t2;
|
|
x (select group_concat(x) from t2)
|
|
1 1,1
|
|
2 2,2
|
|
drop table t2;
|
|
create table t1 (d int not null auto_increment,primary key(d), a int, b int, c int);
|
|
insert into t1(a,b) values (1,3), (1,4), (1,2), (2,7), (1,1), (1,2), (2,3), (2,3);
|
|
select d,a,b from t1 order by a;
|
|
d a b
|
|
1 1 3
|
|
2 1 4
|
|
3 1 2
|
|
5 1 1
|
|
6 1 2
|
|
4 2 7
|
|
7 2 3
|
|
8 2 3
|
|
explain select a, group_concat(b) from t1 group by a with rollup;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 Using filesort
|
|
select a, group_concat(b) from t1 group by a with rollup;
|
|
a group_concat(b)
|
|
1 3,4,2,1,2
|
|
2 7,3,3
|
|
NULL 3,4,2,1,2,7,3,3
|
|
select a, group_concat(distinct b) from t1 group by a with rollup;
|
|
a group_concat(distinct b)
|
|
1 3,4,2,1
|
|
2 7,3
|
|
NULL 3,4,2,1,7
|
|
select a, group_concat(b order by b) from t1 group by a with rollup;
|
|
a group_concat(b order by b)
|
|
1 1,2,2,3,4
|
|
2 3,3,7
|
|
NULL 1,2,2,3,3,3,4,7
|
|
select a, group_concat(distinct b order by b) from t1 group by a with rollup;
|
|
a group_concat(distinct b order by b)
|
|
1 1,2,3,4
|
|
2 3,7
|
|
NULL 1,2,3,4,7
|
|
drop table t1;
|