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

Example 1 with FeedPolicyDropStatement

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

the class QueryTranslator method handleDropFeedPolicyStatement.

protected void handleDropFeedPolicyStatement(MetadataProvider metadataProvider, Statement stmt) throws Exception {
    MetadataTransactionContext mdTxnCtx = MetadataManager.INSTANCE.beginTransaction();
    metadataProvider.setMetadataTxnContext(mdTxnCtx);
    FeedPolicyDropStatement stmtFeedPolicyDrop = (FeedPolicyDropStatement) stmt;
    String dataverseName = getActiveDataverse(stmtFeedPolicyDrop.getDataverseName());
    String policyName = stmtFeedPolicyDrop.getPolicyName().getValue();
    MetadataLockManager.INSTANCE.dropFeedPolicyBegin(metadataProvider.getLocks(), dataverseName, dataverseName + "." + policyName);
    try {
        FeedPolicyEntity feedPolicy = MetadataManager.INSTANCE.getFeedPolicy(mdTxnCtx, dataverseName, policyName);
        if (feedPolicy == null) {
            if (!stmtFeedPolicyDrop.getIfExists()) {
                throw new AlgebricksException("Unknown policy " + policyName + " in dataverse " + dataverseName);
            }
            MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
            return;
        }
        MetadataManager.INSTANCE.dropFeedPolicy(mdTxnCtx, dataverseName, policyName);
        MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
    } catch (Exception e) {
        abort(e, e, mdTxnCtx);
        throw e;
    } finally {
        metadataProvider.getLocks().unlock();
    }
}