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-rw-r--r--mysql-test/r/insert_update.result11
-rw-r--r--mysql-test/t/insert_update.test12
2 files changed, 23 insertions, 0 deletions
diff --git a/mysql-test/r/insert_update.result b/mysql-test/r/insert_update.result
index f658ff06624..b1dee844515 100644
--- a/mysql-test/r/insert_update.result
+++ b/mysql-test/r/insert_update.result
@@ -236,3 +236,14 @@ INSERT INTO t2 VALUES (1), (3);
INSERT INTO t1 SELECT 1, COUNT(*) FROM t2 ON DUPLICATE KEY UPDATE j= a;
ERROR 42S22: Unknown column 'a' in 'field list'
DROP TABLE t1,t2;
+CREATE TABLE t1 (f1 INT AUTO_INCREMENT PRIMARY KEY,
+f2 VARCHAR(5) NOT NULL UNIQUE);
+INSERT t1 (f2) VALUES ('test') ON DUPLICATE KEY UPDATE f1 = LAST_INSERT_ID(f1);
+SELECT LAST_INSERT_ID();
+LAST_INSERT_ID()
+1
+INSERT t1 (f2) VALUES ('test') ON DUPLICATE KEY UPDATE f1 = LAST_INSERT_ID(f1);
+SELECT LAST_INSERT_ID();
+LAST_INSERT_ID()
+1
+DROP TABLE t1;
diff --git a/mysql-test/t/insert_update.test b/mysql-test/t/insert_update.test
index 4581cc7a875..2ef378aa478 100644
--- a/mysql-test/t/insert_update.test
+++ b/mysql-test/t/insert_update.test
@@ -162,3 +162,15 @@ INSERT INTO t2 VALUES (1), (3);
--error ER_BAD_FIELD_ERROR
INSERT INTO t1 SELECT 1, COUNT(*) FROM t2 ON DUPLICATE KEY UPDATE j= a;
DROP TABLE t1,t2;
+
+#
+# Bug#27033: 0 as LAST_INSERT_ID() after INSERT .. ON DUPLICATE if rows were
+# touched but not actually changed.
+#
+CREATE TABLE t1 (f1 INT AUTO_INCREMENT PRIMARY KEY,
+ f2 VARCHAR(5) NOT NULL UNIQUE);
+INSERT t1 (f2) VALUES ('test') ON DUPLICATE KEY UPDATE f1 = LAST_INSERT_ID(f1);
+SELECT LAST_INSERT_ID();
+INSERT t1 (f2) VALUES ('test') ON DUPLICATE KEY UPDATE f1 = LAST_INSERT_ID(f1);
+SELECT LAST_INSERT_ID();
+DROP TABLE t1;