String alias = q.getAlias(this);
Value var = factory.newBoundVariable(alias, AbstractExpressionBuilder.TYPE_OBJECT);
var.setMetaData(_entity.meta);
Context currContext = q.ctx();
currContext.addSchema(alias, _entity.meta);
currContext.addVariable(alias, var);
if (currContext.schemaAlias == null)
currContext.schemaAlias = alias;
}
/**