public SqlRexConvertlet get(SqlCall call) {
    SqlRexConvertlet convertlet;
    final SqlOperator op = call.getOperator();

    // Is there a convertlet for this operator
    // (e.g. SqlStdOperatorTable.plusOperator)?
    convertlet = (SqlRexConvertlet) map.get(op);
    if (convertlet != null) {
      return convertlet;
    }

    // Is there a convertlet for this class of operator
    // (e.g. SqlBinaryOperator)?
    Class<? extends Object> clazz = op.getClass();
    while (clazz != null) {
      convertlet = (SqlRexConvertlet) map.get(clazz);
      if (convertlet != null) {
        return convertlet;
      }
      clazz = clazz.getSuperclass();
    }

    // Is there a convertlet for this class of expression
    // (e.g. SqlCall)?
    clazz = call.getClass();
    while (clazz != null) {
      convertlet = (SqlRexConvertlet) map.get(clazz);
      if (convertlet != null) {
        return convertlet;
      }
      clazz = clazz.getSuperclass();
    }
    return null;
  }
 /**
  * Registers method if it: a. is public, and b. is named "convertXxx", and c. has a return type of
  * "RexNode" or a subtype d. has a 2 parameters with types ConvertletContext and SqlNode (or a
  * subtype) respectively.
  */
 private void registerNodeTypeMethod(final Method method) {
   if (!Modifier.isPublic(method.getModifiers())) {
     return;
   }
   if (!method.getName().startsWith("convert")) {
     return;
   }
   if (!RexNode.class.isAssignableFrom(method.getReturnType())) {
     return;
   }
   final Class[] parameterTypes = method.getParameterTypes();
   if (parameterTypes.length != 2) {
     return;
   }
   if (parameterTypes[0] != SqlRexContext.class) {
     return;
   }
   final Class parameterType = parameterTypes[1];
   if (!SqlNode.class.isAssignableFrom(parameterType)) {
     return;
   }
   map.put(
       parameterType,
       new SqlRexConvertlet() {
         public RexNode convertCall(SqlRexContext cx, SqlCall call) {
           try {
             return (RexNode) method.invoke(ReflectiveConvertletTable.this, cx, call);
           } catch (IllegalAccessException e) {
             throw Util.newInternal(e, "while converting " + call);
           } catch (InvocationTargetException e) {
             throw Util.newInternal(e, "while converting " + call);
           }
         }
       });
 }
Example #3
0
 protected RexNode register(RexNode expr) {
   final String key = expr.toString();
   final RexNode previous = mapDigestToExpr.put(key, expr);
   if (!allowDups && (previous != null)) {
     throw new SubExprExistsException(expr);
   }
   return expr;
 }
 /** Converts a {@link Map} of integers to a {@link TargetMapping}. */
 public static TargetMapping target(Map<Integer, Integer> map, int sourceCount, int targetCount) {
   final PartialFunctionImpl mapping =
       new PartialFunctionImpl(sourceCount, targetCount, MappingType.FUNCTION);
   for (Map.Entry<Integer, Integer> entry : map.entrySet()) {
     mapping.set(entry.getKey(), entry.getValue());
   }
   return mapping;
 }
 /**
  * Registers that one operator is an alias for another.
  *
  * @param alias Operator which is alias
  * @param target Operator to translate calls to
  */
 protected void addAlias(final SqlOperator alias, final SqlOperator target) {
   map.put(
       alias,
       new SqlRexConvertlet() {
         public RexNode convertCall(SqlRexContext cx, SqlCall call) {
           Util.permAssert(call.getOperator() == alias, "call to wrong operator");
           final SqlCall newCall = target.createCall(SqlParserPos.ZERO, call.getOperandList());
           return cx.convertExpression(newCall);
         }
       });
 }
 private List<Object> explainInputs(List<RelNode> inputs) {
   final List<Object> list = jsonBuilder.list();
   for (RelNode input : inputs) {
     String id = relIdMap.get(input);
     if (id == null) {
       input.explain(this);
       id = previousId;
     }
     list.add(id);
   }
   return list;
 }
Example #7
0
 @SuppressWarnings("unchecked")
 private static <K, V> HashMap<K, V> copy(Map<K, V> map) {
   HashMap<K, V> copy = new HashMap<K, V>();
   for (Iterator<Map.Entry<K, V>> i = map.entrySet().iterator(); i.hasNext(); ) {
     Map.Entry<K, V> e = i.next();
     if (e.getValue() instanceof Set) {
       copy.put(e.getKey(), (V) copy((Set) e.getValue()));
     } else {
       copy.put(e.getKey(), e.getValue());
     }
   }
   return copy;
 }
  protected void explain_(RelNode rel, List<Pair<String, Object>> values) {
    final Map<String, Object> map = jsonBuilder.map();

    map.put("id", null); // ensure that id is the first attribute
    map.put("relOp", relJson.classToTypeName(rel.getClass()));
    for (Pair<String, Object> value : values) {
      if (value.right instanceof RelNode) {
        continue;
      }
      put(map, value.left, value.right);
    }
    // omit 'inputs: ["3"]' if "3" is the preceding rel
    final List<Object> list = explainInputs(rel.getInputs());
    if (list.size() != 1 || !list.get(0).equals(previousId)) {
      map.put("inputs", list);
    }

    final String id = Integer.toString(relIdMap.size());
    relIdMap.put(rel, id);
    map.put("id", id);

    relList.add(map);
    previousId = id;
  }
Example #9
0
 protected RexNode lookup(RexNode expr) {
   return mapDigestToExpr.get(expr.toString());
 }
 private void put(Map<String, Object> map, String name, Object value) {
   map.put(name, relJson.toJson(value));
 }
 /** Returns a JSON string describing the relational expressions that were just explained. */
 public String asString() {
   final Map<String, Object> map = jsonBuilder.map();
   map.put("rels", relList);
   return jsonBuilder.toJsonString(map);
 }
 /**
  * Registers a convertlet for a given operator instance
  *
  * @param op Operator instance, say {@link org.eigenbase.sql.fun.SqlStdOperatorTable#MINUS}
  * @param convertlet Convertlet
  */
 protected void registerOp(SqlOperator op, SqlRexConvertlet convertlet) {
   map.put(op, convertlet);
 }