Examples of org.eigenbase.reltype.RelDataType

org.eigenbase.reltype.RelDataType
RelDataType represents the type of a scalar expression or entire row returned from a relational expression.
This is a somewhat "fat" interface which unions the attributes of many different type classes into one. Inelegant, but since our type system was defined before the advent of Java generics, it avoids a lot of typecasting.

    SqlParser parser = factory.createParser(factory, sql);
    return parser.parseQuery();
  }


  public void checkColumnType(String sql, String expected) {
    RelDataType actualType = getColumnType(sql);
    String actual = SqlTests.getTypeString(actualType);
    assertEquals(expected, actual);
  }

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    buf.append("}");
    assertEquals(fieldOriginList, buf.toString());
  }


  public void checkResultType(String sql, String expected) {
    RelDataType actualType = getResultType(sql);
    String actual = SqlTests.getTypeString(actualType);
    assertEquals(expected, actual);
  }

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  public void checkCollation(
      String expression,
      String expectedCollationName,
      SqlCollation.Coercibility expectedCoercibility) {
    for (String sql : buildQueries(expression)) {
      RelDataType actualType = getColumnType(sql);
      SqlCollation collation = actualType.getCollation();


      assertEquals(
          expectedCollationName, collation.getCollationName());
      assertEquals(expectedCoercibility, collation.getCoercibility());
    }

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  public void checkCharset(
      String expression,
      Charset expectedCharset) {
    for (String sql : buildQueries(expression)) {
      RelDataType actualType = getColumnType(sql);
      Charset actualCharset = actualType.getCharset();


      if (!expectedCharset.equals(actualCharset)) {
        fail("\n"
            + "Expected=" + expectedCharset.name() + "\n"
            + "  actual=" + actualCharset.name());

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    // This implementation does NOT check the result!
    // (It can't because we're pure Java.)
    // All it does is check the return type.


    // Parse and validate. There should be no errors.
    RelDataType actualType = getColumnType(query);


    // Check result type.
    typeChecker.checkType(actualType);
  }

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                // CREATE TABLE a(a INT);
                // ...
                // CREATE TABLE j(j INT);
                MockSchema schema = new MockSchema("SALES");
                registerSchema(schema);
                final RelDataType intType =
                    typeFactory.createSqlType(SqlTypeName.INTEGER);
                for (int i = 0; i < 10; i++) {
                  String t = String.valueOf((char) ('A' + i));
                  MockTable table = new MockTable(this, schema, t);
                  table.addColumn(t, intType);

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  @Test public void testVariableExecution() throws Exception {
    check(new Action() {
      public void check(RexBuilder rexBuilder, RexExecutorImpl executor) {
        Object[] values = new Object[1];
        final DataContext testContext = new TestDataContext(values);
        final RelDataType varchar = rexBuilder.getTypeFactory().createSqlType(
            SqlTypeName.VARCHAR);
        final RelDataType integer = rexBuilder.getTypeFactory().createSqlType(
            SqlTypeName.INTEGER);
        // optiq is internally creating the creating the input ref via a
        // RexRangeRef
        // which eventually leads to a RexInputRef. So we are good.
        final RexInputRef input = rexBuilder.makeInputRef(varchar, 0);
        final RexNode lengthArg = rexBuilder.makeLiteral(3, integer, true);
        final RexNode substr =
            rexBuilder.makeCall(SqlStdOperatorTable.SUBSTRING, input,
                lengthArg);
        ImmutableList<RexNode> constExps = ImmutableList.of(substr);


        final RelDataTypeFactory typeFactory = rexBuilder.getTypeFactory();
        final RelDataType rowType = typeFactory.builder()
            .add("someStr", varchar)
            .build();


        final RexExecutable exec = executor.getExecutable(rexBuilder,
            constExps, rowType);

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                            rexBuilder.makeFieldAccess(
                                rexBuilder.makeRangeReference(table),
                                "deptno", true),
                            rexBuilder.makeExactLiteral(BigDecimal.TEN)));
                final RelJsonWriter writer = new RelJsonWriter();
                final RelDataType intType =
                    cluster.getTypeFactory().createSqlType(SqlTypeName.INTEGER);
                AggregateRel aggregate =
                    new AggregateRel(cluster, filter, BitSets.of(0),
                        ImmutableList.of(
                            new AggregateCall(SqlStdOperatorTable.COUNT,

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  public String toString() {
    return "MongoTable {" + collectionName + "}";
  }


  public RelDataType getRowType(RelDataTypeFactory typeFactory) {
    final RelDataType mapType =
        typeFactory.createMapType(
            typeFactory.createSqlType(SqlTypeName.VARCHAR),
            typeFactory.createSqlType(SqlTypeName.ANY));
    return typeFactory.builder().add("_MAP", mapType).build();
  }

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      if (op.right.startsWith("{$project:")) {
        project = op.left;
        ++findCount;
      }
    }
    final RelDataType rowType = getRowType();
    final PhysType physType =
        PhysTypeImpl.of(
            implementor.getTypeFactory(), rowType,
            pref.prefer(JavaRowFormat.ARRAY));
    final Expression fields =
        list.append("fields",
            constantArrayList(
                Pair.zip(MongoRules.mongoFieldNames(rowType),
                    new AbstractList<Class>() {
                      @Override public Class get(int index) {
                        return physType.fieldClass(index);
                      }


                      @Override public int size() {
                        return rowType.getFieldCount();
                      }
                    }),
                Pair.class));
    final Expression table =
        list.append("table",

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