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

Example 1 with CreateDataverseStatement

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

the class QueryTranslator method handleCreateDataverseStatement.

protected void handleCreateDataverseStatement(MetadataProvider metadataProvider, Statement stmt) throws Exception {
    CreateDataverseStatement stmtCreateDataverse = (CreateDataverseStatement) stmt;
    String dvName = stmtCreateDataverse.getDataverseName().getValue();
    MetadataTransactionContext mdTxnCtx = MetadataManager.INSTANCE.beginTransaction();
    metadataProvider.setMetadataTxnContext(mdTxnCtx);
    MetadataLockManager.INSTANCE.acquireDataverseReadLock(metadataProvider.getLocks(), dvName);
    try {
        Dataverse dv = MetadataManager.INSTANCE.getDataverse(metadataProvider.getMetadataTxnContext(), dvName);
        if (dv != null) {
            if (stmtCreateDataverse.getIfNotExists()) {
                MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
                return;
            } else {
                throw new AlgebricksException("A dataverse with this name " + dvName + " already exists.");
            }
        }
        MetadataManager.INSTANCE.addDataverse(metadataProvider.getMetadataTxnContext(), new Dataverse(dvName, stmtCreateDataverse.getFormat(), MetadataUtil.PENDING_NO_OP));
        MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
    } catch (Exception e) {
        abort(e, e, mdTxnCtx);
        throw e;
    } finally {
        metadataProvider.getLocks().unlock();
    }
}