// add a non-null constraint
builder = new VoltProjectBuilder();
builder.addLiteralSchema("\nCREATE TABLE A (C1 BIGINT NOT NULL, C2 BIGINT , PRIMARY KEY(C1));");
builder.addPartitionInfo("A", "C1");
builder.addProcedures(org.voltdb.catalog.ProcedureA.class);
builder.compile(testDir + File.separator + "testDropNonNullity2.jar");
Catalog catUpdated = catalogForJar(testDir + File.separator + "testDropNonNullity2.jar");
String report = verifyDiff(catOriginal, catUpdated);
assert(report.contains("Table A has been modified."));