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Merge 10.9 into 10.10
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@@ -94,4 +94,58 @@ DROP TABLE t1;
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disconnect test_con2;
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disconnect test_con1;
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connection default;
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CREATE TABLE t1(val VARCHAR(100) PRIMARY KEY) CHARACTER SET utf8mb4 COLLATE utf8mb4_danish_ci;
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INSERT INTO t1 VALUES('bar');
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INSERT INTO t1 VALUES('foo');
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SET group_concat_max_len = 1073741823;
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SHOW VARIABLES LIKE 'group_concat_max_len';
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Variable_name Value
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group_concat_max_len 1073741823
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SELECT GROUP_CONCAT(val) AS simple FROM t1;
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simple
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bar,foo
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SELECT * FROM ( SELECT GROUP_CONCAT(val) AS nested FROM t1) As tmp;
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nested
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bar,foo
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SET group_concat_max_len = 1073741824;
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SHOW VARIABLES LIKE 'group_concat_max_len';
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Variable_name Value
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group_concat_max_len 1073741824
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SELECT GROUP_CONCAT(val) AS simple FROM t1;
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simple
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bar,foo
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SELECT * FROM ( SELECT GROUP_CONCAT(val) AS nested FROM t1) As tmp;
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nested
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bar,foo
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SET group_concat_max_len = 1073741825;
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SHOW VARIABLES LIKE 'group_concat_max_len';
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Variable_name Value
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group_concat_max_len 1073741825
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SELECT GROUP_CONCAT(val) AS simple FROM t1;
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simple
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bar,foo
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SELECT * FROM ( SELECT GROUP_CONCAT(val) AS nested FROM t1) As tmp;
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nested
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bar,foo
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SET group_concat_max_len = 1073741826;
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SHOW VARIABLES LIKE 'group_concat_max_len';
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Variable_name Value
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group_concat_max_len 1073741826
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SELECT GROUP_CONCAT(val) AS simple FROM t1;
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simple
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bar,foo
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SELECT * FROM ( SELECT GROUP_CONCAT(val) AS nested FROM t1) As tmp;
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nested
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bar,foo
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SET group_concat_max_len = 2147483649;
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SHOW VARIABLES LIKE 'group_concat_max_len';
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Variable_name Value
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group_concat_max_len 2147483649
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SELECT GROUP_CONCAT(val) AS simple FROM t1;
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simple
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bar,foo
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SELECT * FROM ( SELECT GROUP_CONCAT(val) AS nested FROM t1) As tmp;
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nested
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bar,foo
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DROP TABLE t1;
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SET @@global.group_concat_max_len = @save;
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