/** Creates a non unique index for the given table. */
private void createNonUnique(Table t) throws SQLException {
boolean comma = false;
int indexNumber = 1;
Iterator<Key> j = t.getKeys().iterator();
while (j.hasNext()) {
Key key = j.next();
if (key.getType() == Key.NonUnique) {
String SQL = "CREATE INDEX " + t.getName() + "_" + indexNumber;
SQL += " ON " + t.getSchema() + "." + t.getName() + "(";
Iterator<Column> i = key.getColumns().iterator();
comma = false;
while (i.hasNext()) {
Column c = i.next();
SQL += (comma ? ", " : "") + c.getName();
comma = true;
}
indexNumber++;
SQL += ")";
execute(SQL);
}
}
}
/**
* {@inheritDoc}
*
* @see
* com.continuent.tungsten.replicator.database.AbstractDatabase#createTable(com.continuent.tungsten.replicator.database.Table,
* boolean, java.lang.String)
*/
@Override
public void createTable(Table t, boolean replace) throws SQLException {
boolean comma = false;
boolean hasNonUnique = false;
if (replace) dropTable(t);
else {
// If table already exists, do nothing. This behavior is a mimic of
// MySQLDatabase for initial configuration to work. For some reason,
// Replicator is trying to create Tungsten tables more than once.
if (tableExists(t)) return;
}
String temporary = t.isTemporary() ? "TEMPORARY " : "";
// Temporary tables cannot specify a schema name:
String SQL =
"CREATE "
+ temporary
+ "TABLE "
+ t.getSchema()
+ (t.isTemporary() ? "_" : ".")
+ t.getName()
+ " (";
Iterator<Column> i = t.getAllColumns().iterator();
while (i.hasNext()) {
Column c = i.next();
SQL +=
(comma ? ", " : "")
+ c.getName()
+ " "
+ columnToTypeString(c)
+ (c.isNotNull() ? " NOT NULL" : "");
comma = true;
}
Iterator<Key> j = t.getKeys().iterator();
while (j.hasNext()) {
Key key = j.next();
if (key.getType() == Key.NonUnique) {
// Non-unique keys will be created with a separate CREATE
// INDEX statement.
hasNonUnique = true;
continue;
}
SQL += ", ";
switch (key.getType()) {
case Key.Primary:
SQL += "PRIMARY KEY (";
break;
case Key.Unique:
SQL += "UNIQUE (";
break;
}
i = key.getColumns().iterator();
comma = false;
while (i.hasNext()) {
Column c = i.next();
SQL += (comma ? ", " : "") + c.getName();
comma = true;
}
SQL += ")";
}
SQL += ")";
// Create the table.
execute(SQL);
// Create non-unique keys.
if (hasNonUnique) createNonUnique(t);
}
