in asterix-graphix/src/main/java/org/apache/asterix/graphix/lang/rewrite/print/SqlppASTPrintQueryVisitor.java [472:490]
public String visit(LiteralExpr literalExpr, Void arg) {
switch (literalExpr.getValue().getLiteralType()) {
case STRING:
return "\"" + literalExpr.getValue().getStringValue() + "\"";
case INTEGER:
case FLOAT:
case DOUBLE:
case LONG:
return literalExpr.getValue().getStringValue();
case MISSING:
case NULL:
case TRUE:
case FALSE:
return literalExpr.getValue().getStringValue().toUpperCase();
}
return null;
}