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From "Thomas Dudziak (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DDLUTILS-195) Can not update a foreign key on a case sensetive MySql Database
Date Wed, 05 Nov 2008 06:21:44 GMT

    [ https://issues.apache.org/jira/browse/DDLUTILS-195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12645156#action_12645156
] 

Thomas Dudziak commented on DDLUTILS-195:
-----------------------------------------

Are you talking about the lower_case_table_names configuration option ? A normal Linux Mysql
installation should not require tweaking this setting. Could you try these two sets of SQL:

(1)

CREATE TABLE Roundtrip1
(
    Pk1 INTEGER NOT NULL,
    Pk2 DOUBLE NOT NULL,
    PRIMARY KEY (Pk1, Pk2)
) ENGINE=InnoDB;

CREATE TABLE Roundtrip2
(
    Pk INTEGER NOT NULL,
    Avalue1 DOUBLE NOT NULL,
    Avalue2 INTEGER NOT NULL,
    PRIMARY KEY (Pk)
) ENGINE=InnoDB;

ALTER TABLE Roundtrip2
    ADD CONSTRAINT Rt1_To_Rt2 FOREIGN KEY (Avalue2, Avalue1) REFERENCES Roundtrip1 (Pk1, Pk2);

ALTER TABLE Roundtrip2
    DROP FOREIGN KEY Rt1_To_Rt2;

ALTER TABLE Roundtrip2
    DROP INDEX Rt1_To_Rt2;


(2)

CREATE TABLE `Roundtrip1`
(
    `Pk1` INTEGER NOT NULL,
    `Pk2` DOUBLE NOT NULL,
    PRIMARY KEY (`Pk1`, `Pk2`)
) ENGINE=InnoDB;


CREATE TABLE `Roundtrip2`
(
    `Pk` INTEGER NOT NULL,
    `Avalue1` DOUBLE NOT NULL,
    `Avalue2` INTEGER NOT NULL,
    PRIMARY KEY (`Pk`)
) ENGINE=InnoDB;

ALTER TABLE `Roundtrip2`
    ADD CONSTRAINT `Rt1_To_Rt2` FOREIGN KEY (`Avalue2`, `Avalue1`) REFERENCES `Roundtrip1`
(`Pk1`, `Pk2`);

ALTER TABLE `Roundtrip2`
    DROP FOREIGN KEY `Rt1_To_Rt2`;

ALTER TABLE `Roundtrip2`
    DROP INDEX `Rt1_To_Rt2`;


Both of these should work fine (they run without problems on my my 5.0.51a installation running
with default configuration on Ubuntu). 

> Can not update a foreign key on a case sensetive MySql Database
> ---------------------------------------------------------------
>
>                 Key: DDLUTILS-195
>                 URL: https://issues.apache.org/jira/browse/DDLUTILS-195
>             Project: DdlUtils
>          Issue Type: Bug
>          Components: Core - MySql
>    Affects Versions: 1.1
>         Environment: Trying to update a existing case sensitive mysql database on Linux

>            Reporter: meindert hoving
>            Assignee: Thomas Dudziak
>             Fix For: 1.1
>
>
> For testing purposes I made my MySql database case sensitive (to avoid problems when
deploying to linux)
> The foreign key restrained throws the following exception;
> throw new ModelException("The foreignkey "+fkDesc+" in table "+curTable.getName()+" references
the undefined table "+fk.getForeignTableName());
> fk.getForeignTableName is all lower case, while the table name is camel case. hacking
the correct camel case into the piece of code that throws the exception 'fixes' the issue.
Therefore the issue is that fk.getForeignTableName()) contains the wrong table name.
> This wrong table name comes from JdbcModelReader
> fk.setForeignTableName((String)values.get("PKTABLE_NAME"));
> The PKTABLE_NAME value comes from readColumn what returns the table name in lowercase

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