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

Example 1 with TypeDropStatement

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

the class QueryTranslator method handleTypeDropStatement.

protected void handleTypeDropStatement(MetadataProvider metadataProvider, Statement stmt) throws Exception {
    TypeDropStatement stmtTypeDrop = (TypeDropStatement) stmt;
    String dataverseName = getActiveDataverse(stmtTypeDrop.getDataverseName());
    String typeName = stmtTypeDrop.getTypeName().getValue();
    MetadataTransactionContext mdTxnCtx = MetadataManager.INSTANCE.beginTransaction();
    metadataProvider.setMetadataTxnContext(mdTxnCtx);
    MetadataLockManager.INSTANCE.dropTypeBegin(metadataProvider.getLocks(), dataverseName, dataverseName + "." + typeName);
    try {
        Datatype dt = MetadataManager.INSTANCE.getDatatype(mdTxnCtx, dataverseName, typeName);
        if (dt == null) {
            if (!stmtTypeDrop.getIfExists()) {
                throw new AlgebricksException("There is no datatype with this name " + typeName + ".");
            }
        } else {
            MetadataManager.INSTANCE.dropDatatype(mdTxnCtx, dataverseName, typeName);
        }
        MetadataManager.INSTANCE.commitTransaction(mdTxnCtx);
    } catch (Exception e) {
        abort(e, e, mdTxnCtx);
        throw e;
    } finally {
        metadataProvider.getLocks().unlock();
    }
}