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Kirill Smelkov
mariadb
Commits
c883dacd
Commit
c883dacd
authored
Jul 12, 2002
by
arjen@fred.bitbike.com
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Clarified LAST_INSERT_ID() behaviour for multi-row inserts.
Shuffled lines for easier reading. Added missing SQL line.
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28c2277b
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Docs/manual.texi
View file @
c883dacd
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@@ -13684,6 +13684,14 @@ Which returns:
+----+---------+
@end example
You can retrieve the used @code{AUTO_INCREMENT} key with the
@code{LAST_INSERT_ID()} SQL function or the @code{mysql_insert_id()} API
function.
Note: for a multi-row insert,
@code{LAST_INSERT_ID()}/@code{mysql_insert_id()} will actually return the
@code{AUTO_INCREMENT} key from the @strong{first} inserted row. This allows
multi-row inserts to be reproduced on other servers.
For MyISAM and BDB tables you can specify @code{AUTO_INCREMENT} on
secondary column in a multi-column key. In this case the generated
value for the autoincrement column is calculated as
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@@ -13694,6 +13702,7 @@ useful when you want to put data into ordered groups.
CREATE TABLE animals (
grp ENUM('fish','mammal','bird') NOT NULL,
id MEDIUMINT NOT NULL AUTO_INCREMENT,
name CHAR(30) NOT NULL,
PRIMARY KEY (grp,id)
);
INSERT INTO animals (grp,name) VALUES("mammal","dog"),("mammal","cat"),
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@@ -13716,9 +13725,6 @@ Which returns:
Note that in this case, the @code{AUTO_INCREMENT} value will be reused if you
delete the row with the biggest @code{AUTO_INCREMENT} value in any group.
You can get the used @code{AUTO_INCREMENT} key with the
@code{LAST_INSERT_ID()} SQL function or the @code{mysql_insert_id()} API
function.
@node Batch mode, Twin, Examples, Tutorial
@section Using @code{mysql} in Batch Mode
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