Examples with NodeGroupDropStatement org.apache.asterix.lang.common.statement.NodeGroupDropStatement used on opensource projects

Example 1 with NodeGroupDropStatement

use of org.apache.asterix.lang.common.statement.NodeGroupDropStatement in project asterixdb by apache.

the class QueryTranslator method handleNodegroupDropStatement.

protected void handleNodegroupDropStatement(MetadataProvider metadataProvider, Statement stmt) throws Exception {
    NodeGroupDropStatement stmtDelete = (NodeGroupDropStatement) stmt;
    String nodegroupName = stmtDelete.getNodeGroupName().getValue();
    MetadataTransactionContext mdTxnCtx = MetadataManager.INSTANCE.beginTransaction();
    metadataProvider.setMetadataTxnContext(mdTxnCtx);
    MetadataLockManager.INSTANCE.acquireNodeGroupWriteLock(metadataProvider.getLocks(), nodegroupName);
    try {
        NodeGroup ng = MetadataManager.INSTANCE.getNodegroup(mdTxnCtx, nodegroupName);
        if (ng == null) {
            if (!stmtDelete.getIfExists()) {
                throw new AlgebricksException("There is no nodegroup with this name " + nodegroupName + ".");
            }
        } else {
            MetadataManager.INSTANCE.dropNodegroup(mdTxnCtx, nodegroupName, false);
        }
        MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
    } catch (Exception e) {
        abort(e, e, mdTxnCtx);
        throw e;
    } finally {
        metadataProvider.getLocks().unlock();
    }
}