public ValueExpressionEvaluator(ValueExpr expr, SQLBuilder parent, ValueType optype) {
this.parent = parent;
optypes.push(optype);
if (log.isTraceEnabled()) {
long start = System.currentTimeMillis();
expr.visit(this);
log.trace("expression evaluated in {} ms", (System.currentTimeMillis() - start));
} else {
expr.visit(this);
}
}
@Override
public void meet(Bound node) throws RuntimeException {
ValueExpr arg = node.getArg();
if (arg instanceof ValueConstant) {
builder.append(Boolean.toString(true));
} else if (arg instanceof Var) {
builder.append("(");
optypes.push(ValueType.NODE);
arg.visit(this);
optypes.pop();
builder.append(" IS NOT NULL)");
}
}
