/**
* Return reference to default schema instance in a schema tree. Each {@link
* org.apache.calcite.schema.SchemaPlus} instance can refer to its parent and its children. From
* the returned reference to default schema instance, clients can traverse the entire schema tree
* and know the default schema where to look up the tables first.
*
* @return Reference to default schema instance in a schema tree.
*/
public SchemaPlus getNewDefaultSchema() {
final SchemaPlus rootSchema = getRootSchema();
final SchemaPlus defaultSchema = session.getDefaultSchema(rootSchema);
if (defaultSchema == null) {
return rootSchema;
}
return defaultSchema;
}
