protected void handleTypeDropStatement(MetadataProvider metadataProvider, Statement stmt) throws Exception { TypeDropStatement stmtTypeDrop = (TypeDropStatement) stmt; SourceLocation sourceLoc = stmtTypeDrop.getSourceLocation(); String dataverseName = getActiveDataverse(stmtTypeDrop.getDataverseName()); String typeName = stmtTypeDrop.getTypeName().getValue(); MetadataTransactionContext mdTxnCtx = MetadataManager.INSTANCE.beginTransaction(); metadataProvider.setMetadataTxnContext(mdTxnCtx); MetadataLockUtil.dropTypeBegin(lockManager, metadataProvider.getLocks(), dataverseName, dataverseName + "." + typeName); try { Datatype dt = MetadataManager.INSTANCE.getDatatype(mdTxnCtx, dataverseName, typeName); if (dt == null) { if (!stmtTypeDrop.getIfExists()) { throw new CompilationException(ErrorCode.UNKNOWN_TYPE, sourceLoc, 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(); } }