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.

    return new AbstractQueryableTable(Object[].class) {
      public RelDataType getRowType(RelDataTypeFactory typeFactory) {
        final RelDataTypeFactory.FieldInfoBuilder builder =
          typeFactory.builder();
        builder.add("row_name", typeFactory.createJavaType(String.class));
        final RelDataType int_ = typeFactory.createJavaType(int.class);
        for (int i = 1; i <= ncol; i++) {
          builder.add("c" + i, int_);
        }
        return builder.build();
      }

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    assertEquals(2, pair.cardinality);
  }


  @Test public void testLoadSorted() {
    final JavaTypeFactoryImpl typeFactory = new JavaTypeFactoryImpl();
    final RelDataType rowType =
        typeFactory.builder()
            .add("empid", typeFactory.createType(int.class))
            .add("deptno", typeFactory.createType(int.class))
            .add("name", typeFactory.createType(String.class))
            .build();

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  /** As {@link #testLoadSorted()} but column #1 is the unique column, not
   * column #0. The algorithm needs to go back and permute the values of
   * column #0 after it discovers that column #1 is unique and sorts by it. */
  @Test public void testLoadSorted2() {
    final JavaTypeFactoryImpl typeFactory = new JavaTypeFactoryImpl();
    final RelDataType rowType =
        typeFactory.builder()
            .add("deptno", typeFactory.createType(int.class))
            .add("empid", typeFactory.createType(int.class))
            .add("name", typeFactory.createType(String.class))
            .build();

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              RelOptSchema relOptSchema,
              SchemaPlus rootSchema) {
            final RelDataTypeFactory typeFactory = cluster.getTypeFactory();
            final Table table = new AbstractTable() {
              public RelDataType getRowType(RelDataTypeFactory typeFactory) {
                final RelDataType stringType =
                    typeFactory.createJavaType(String.class);
                final RelDataType integerType =
                    typeFactory.createJavaType(Integer.class);
                return typeFactory.builder()
                    .add("s", stringType)
                    .add("i", integerType)
                    .build();

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    SqlValidatorTestCase.checkEx(thrown, expectedMsgPattern, sap);
  }


  public RelDataType getColumnType(String sql) {
    RelDataType rowType = getResultType(sql);
    final List<RelDataTypeField> fields = rowType.getFieldList();
    assertEquals("expected query to return 1 field", 1, fields.size());
    return fields.get(0).getType();
  }

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    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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