Examples of org.eigenbase.reltype.RelDataTypeFactory

org.eigenbase.reltype.RelDataTypeFactory
RelDataTypeFactory is a factory for datatype descriptors. It defines methods for instantiating and combining SQL, Java, and collection types. The factory also provides methods for return type inference for arithmetic in cases where SQL 2003 is implementation defined or impractical.
This interface is an example of the {@link org.eigenbase.util.Glossary#ABSTRACT_FACTORY_PATTERN abstract factory pattern}. Any implementation of RelDataTypeFactory must ensure that type objects are canonical: two types are equal if and only if they are represented by the same Java object. This reduces memory consumption and comparison cost.

    this.dataContext = dataContext;
  }


  private String compile(RexBuilder rexBuilder, List<RexNode> constExps,
      RexToLixTranslator.InputGetter getter) {
    final RelDataTypeFactory typeFactory = rexBuilder.getTypeFactory();
    final RelDataType emptyRowType = typeFactory.builder().build();
    return compile(rexBuilder, constExps, getter, emptyRowType);
  }

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        + "<MAP>[<VALUE>]";
  }


  @Override
  public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
    final RelDataTypeFactory typeFactory = opBinding.getTypeFactory();
    final RelDataType operandType = opBinding.getOperandType(0);
    switch (operandType.getSqlTypeName()) {
    case ARRAY:
      return typeFactory.createTypeWithNullability(
          operandType.getComponentType(), true);
    case MAP:
      return typeFactory.createTypeWithNullability(operandType.getValueType(),
          true);
    case ANY:
      return typeFactory.createSqlType(SqlTypeName.ANY);
    default:
      throw new AssertionError();
    }
  }

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      AggregateRelBase oldAggRel,
      AggregateCall oldCall,
      List<AggregateCall> newCalls,
      Map<AggregateCall, RexNode> aggCallMapping) {
    final int nGroups = oldAggRel.getGroupCount();
    RelDataTypeFactory typeFactory =
        oldAggRel.getCluster().getTypeFactory();
    RexBuilder rexBuilder = oldAggRel.getCluster().getRexBuilder();
    int iAvgInput = oldCall.getArgList().get(0);
    RelDataType avgInputType =
        getFieldType(
            oldAggRel.getChild(),
            iAvgInput);
    RelDataType sumType =
        typeFactory.createTypeWithNullability(
            avgInputType,
            avgInputType.isNullable() || nGroups == 0);
    // SqlAggFunction sumAgg = new SqlSumAggFunction(sumType);
    SqlAggFunction sumAgg = new SqlSumEmptyIsZeroAggFunction(sumType);
    AggregateCall sumCall =

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      AggregateRelBase oldAggRel,
      AggregateCall oldCall,
      List<AggregateCall> newCalls,
      Map<AggregateCall, RexNode> aggCallMapping) {
    final int nGroups = oldAggRel.getGroupCount();
    RelDataTypeFactory typeFactory =
        oldAggRel.getCluster().getTypeFactory();
    RexBuilder rexBuilder = oldAggRel.getCluster().getRexBuilder();
    int arg = oldCall.getArgList().get(0);
    RelDataType argType =
        getFieldType(
            oldAggRel.getChild(),
            arg);
    RelDataType sumType =
        typeFactory.createTypeWithNullability(
            argType, argType.isNullable());
    SqlAggFunction sumZeroAgg = new SqlSumEmptyIsZeroAggFunction(sumType);
    AggregateCall sumZeroCall =
        new AggregateCall(
            sumZeroAgg,

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    //   power(
    //     (sum(x * x) - sum(x) * sum(x) / count(x))
    //     / nullif(count(x) - 1, 0),
    //     .5)
    final int nGroups = oldAggRel.getGroupCount();
    RelDataTypeFactory typeFactory =
        oldAggRel.getCluster().getTypeFactory();
    final RexBuilder rexBuilder = oldAggRel.getCluster().getRexBuilder();


    assert oldCall.getArgList().size() == 1 : oldCall.getArgList();
    final int argOrdinal = oldCall.getArgList().get(0);
    final RelDataType argType =
        getFieldType(
            oldAggRel.getChild(),
            argOrdinal);


    // final RexNode argRef = inputExprs.get(argOrdinal);
    RexNode argRef = rexBuilder.makeCall(CastHighOp, inputExprs.get(argOrdinal));
    inputExprs.set(argOrdinal, argRef);


    final RexNode argSquared =
        rexBuilder.makeCall(
            SqlStdOperatorTable.MULTIPLY, argRef, argRef);
    final int argSquaredOrdinal = lookupOrAdd(inputExprs, argSquared);


    final RelDataType sumType =
        typeFactory.createTypeWithNullability(
            argType,
            true);
    final AggregateCall sumArgSquaredAggCall =
        new AggregateCall(
            new SqlSumAggFunction(sumType),

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  {
  @Test
  /** Tests that we can analyze a program with no inputs or outputs. */
  public void testAnalyzeProgram()
    {
    final RelDataTypeFactory typeFactory = new FieldTypeFactory();
    final RelDataType inputType = typeFactory.createStructType( new RelDataTypeFactory.FieldInfoBuilder() );
    final RelDataType outputType = typeFactory.createStructType( new RelDataTypeFactory.FieldInfoBuilder() );
    final RexProgram program = new RexProgram(
      inputType,
      Collections.<RexNode>emptyList(),
      Collections.<RexLocalRef>emptyList(),
      null,

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  @Test
  /** Tests that we can analyze a program with no inputs that outputs two
   * constants. */
  public void testAnalyzeTwoConstantProgram()
    {
    final RelDataTypeFactory typeFactory = new FieldTypeFactory();
    final RelDataType inputType = typeFactory.createStructType( new RelDataTypeFactory.FieldInfoBuilder() );
    final RexBuilder builder = new RexBuilder( typeFactory );
    final RexProgramBuilder programBuilder = new RexProgramBuilder( inputType, builder );
    programBuilder.addProject( builder.makeExactLiteral( BigDecimal.ONE ), "x" );
    programBuilder.addProject( builder.makeCharLiteral( new NlsString( "foo", null, null ) ), "y" );
    final RexProgram program = programBuilder.getProgram();

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