PatchedMySQL5InnoDBDialect.java

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 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
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package org.dcm4chee.archive.entity.dialect;

import java.sql.Types;

import org.hibernate.dialect.MySQL5InnoDBDialect;
import org.hibernate.internal.util.StringHelper;

/**
 * @author Torsten Krah
 * @see https://hibernate.onjira.com/browse/HHH-6935
 *
 */
public class PatchedMySQL5InnoDBDialect extends MySQL5InnoDBDialect {

    public PatchedMySQL5InnoDBDialect() {
        registerColumnType(Types.BOOLEAN, "bit");
    }

    // Avoid explicit creation of index, so MySQL will drop the implicit
    // created index on later explicit creation of another index that can be
    // used to enforce the foreign key constraint.
    @Override
    public String getAddForeignKeyConstraintString(String constraintName,
            String[] foreignKey, String referencedTable, String[] primaryKey,
            boolean referencesPrimaryKey) {
        String cols = StringHelper.join(", ", foreignKey);
        return new StringBuilder(30)
                .append(" add constraint ")
                .append(constraintName)
                .append(" foreign key (")
                .append(cols)
                .append(") references ")
                .append(referencedTable)
                .append(" (")
                .append( StringHelper.join(", ", primaryKey) )
                .append(')')
                .toString();
    }

}