protected void writeForeignKey(
DdlWrite write,
String fkName,
String tableName,
String[] columns,
String refTable,
String[] refColumns,
String indexName)
throws IOException {
tableName = lowerName(tableName);
DdlBuffer fkeyBuffer = write.applyForeignKeys();
alterTableAddForeignKey(fkeyBuffer, fkName, tableName, columns, refTable, refColumns);
if (indexName != null) {
// no matching unique constraint so add the index
fkeyBuffer.append(platformDdl.createIndex(indexName, tableName, columns)).endOfStatement();
}
fkeyBuffer.end();
write
.rollbackForeignKeys()
.append(platformDdl.alterTableDropForeignKey(tableName, fkName))
.endOfStatement();
if (indexName != null) {
write
.rollbackForeignKeys()
.append(platformDdl.dropIndex(indexName, tableName))
.endOfStatement();
}
write.rollbackForeignKeys().end();
}
@Override
public void generate(DdlWrite writer, DropIndex dropIndex) throws IOException {
writer
.apply()
.append(platformDdl.dropIndex(dropIndex.getIndexName(), dropIndex.getTableName()))
.endOfStatement();
}
protected void addUniqueConstraint(DdlWrite writer, AlterColumn alter, String uqName)
throws IOException {
String[] cols = {alter.getColumnName()};
writer
.apply()
.append(platformDdl.alterTableAddUniqueConstraint(alter.getTableName(), uqName, cols))
.endOfStatement();
writer
.rollbackForeignKeys()
.append(platformDdl.dropIndex(uqName, alter.getTableName()))
.endOfStatement();
}
/**
* Specific handling of OneToOne unique constraints for MsSqlServer. For all other DB platforms
* these unique constraints are done inline as per normal.
*/
protected void writeUniqueOneToOneConstraints(DdlWrite write, CreateTable createTable)
throws IOException {
String tableName = createTable.getName();
for (Column col : externalUnique) {
String uqName = col.getUniqueOneToOne();
String[] columnNames = {col.getName()};
write
.apply()
.append(platformDdl.alterTableAddUniqueConstraint(tableName, uqName, columnNames))
.endOfStatement();
write.rollbackForeignKeys().append(platformDdl.dropIndex(uqName, tableName)).endOfStatement();
}
}
