Package org.eigenbase.rex

Examples of org.eigenbase.rex.RexBuilder

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  RexNode toRex(
      FunctionExpression expression,
      RelNode... inputs) {
    List<RexNode> list = new ArrayList<RexNode>();
    RexBuilder rexBuilder = cluster.getRexBuilder();
    for (RelNode input : inputs) {
      list.add(rexBuilder.makeRangeReference(input));
    }
    return OptiqPrepareImpl.EmptyScalarTranslator.empty(rexBuilder)
        .bind(expression.parameterList, list)
        .toRex(expression.body);
  }
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    }
  }

  // RexBuilder is stateless; no need to store one
  private RexBuilder createRexBuilder() {
    return new RexBuilder(typeFactory);
  }
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        Iterables.concat(childInfo.pulledUpPredicates,
            RelOptUtil.conjunctions(filter.getCondition())));
  }

  public RelOptPredicateList getPredicates(JoinRelBase join) {
    RexBuilder rB = join.getCluster().getRexBuilder();
    RelNode left = join.getInput(0);
    RelNode right = join.getInput(1);

    RelOptPredicateList leftInfo =
        RelMetadataQuery.getPulledUpPredicates(left);
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   * Infers predicates for a UnionRelBase.
   *
   * <p>The pulled up expression is a disjunction of its children's predicates.
   */
  public RelOptPredicateList getPredicates(UnionRelBase union) {
    RexBuilder rB = union.getCluster().getRexBuilder();
    List<RexNode> orList = Lists.newArrayList();
    for (RelNode input : union.getInputs()) {
      RelOptPredicateList info = RelMetadataQuery.getPulledUpPredicates(input);
      if (!info.pulledUpPredicates.isEmpty()) {
        orList.addAll(
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      }

      // Only process equivalences found in the join conditions. Processing
      // Equivalences from the left or right side infer predicates that are
      // already present in the Tree below the join.
      RexBuilder rexBuilder = joinRel.getCluster().getRexBuilder();
      List<RexNode> exprs =
          RelOptUtil.conjunctions(
              compose(rexBuilder, ImmutableList.of(joinRel.getCondition())));

      final EquivalenceFinder eF = new EquivalenceFinder();
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                    new ReflectiveSchema(new JdbcTest.HrSchema()));
                TableAccessRel table =
                    new TableAccessRel(cluster,
                        relOptSchema.getTableForMember(
                            Arrays.asList("hr", "emps")));
                final RexBuilder rexBuilder = cluster.getRexBuilder();
                FilterRel filter =
                    new FilterRel(cluster, table,
                        rexBuilder.makeCall(
                            SqlStdOperatorTable.EQUALS,
                            rexBuilder.makeFieldAccess(
                                rexBuilder.makeRangeReference(table),
                                "deptno", true),
                            rexBuilder.makeExactLiteral(BigDecimal.TEN)));
                final RelJsonWriter writer = new RelJsonWriter();
                final RelDataType intType =
                    cluster.getTypeFactory().createSqlType(SqlTypeName.INTEGER);
                final RelDataType bigIntType =
                    cluster.getTypeFactory().createSqlType(SqlTypeName.BIGINT);
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      if (hasEquijoins) {
        addFilter = true;
        List<RexNode> equijoinList = Lists.newArrayList();
        List<RelDataTypeField> leftTypes = convertedLeft.getRowType().getFieldList();
        List<RelDataTypeField> rightTypes = convertedRight.getRowType().getFieldList();
        RexBuilder builder = join.getCluster().getRexBuilder();

        for (int i=0; i < leftKeys.size(); i++) {
          int leftKeyOrdinal = leftKeys.get(i).intValue();
          int rightKeyOrdinal = rightKeys.get(i).intValue();

          equijoinList.add(builder.makeCall(
              SqlStdOperatorTable.EQUALS,
              builder.makeInputRef(leftTypes.get(leftKeyOrdinal).getType(), leftKeyOrdinal),
              builder.makeInputRef(rightTypes.get(rightKeyOrdinal).getType(), rightKeyOrdinal + numLeftFields)
             ) );
        }
        newJoinCondition = RexUtil.composeConjunction(builder, equijoinList, false);
      } else {
//        tracer.warning("Non-equijoins are only supported in the presence of an equijoin.");
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   * till we start scanning. So we don't rewrite extract and treat it as
   * a regular function.
   */
  @Override
  public RexNode convertCall(SqlRexContext cx, SqlCall call) {
    final RexBuilder rexBuilder = cx.getRexBuilder();
    final List<SqlNode> operands = call.getOperandList();
    final List<RexNode> exprs = new LinkedList<>();

    RelDataTypeFactory typeFactory = cx.getTypeFactory();

    //RelDataType nullableReturnType =

    for (SqlNode node: operands) {
       exprs.add(cx.convertExpression(node));
    }

    // Determine NULL-able using 2nd argument's Null-able.
    RelDataType returnType = typeFactory.createTypeWithNullability(typeFactory.createSqlType(SqlTypeName.BIGINT), exprs.get(1).getType().isNullable());

    return rexBuilder.makeCall(returnType, call.getOperator(), exprs);
  }
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        // check if its a convert_from or convert_to function
        if (functionName.equalsIgnoreCase("convert_from") || functionName.equalsIgnoreCase("convert_to")) {
          assert nArgs == 2 && function.getOperands().get(1) instanceof RexLiteral;
          String literal = ((NlsString) (((RexLiteral) function.getOperands().get(1)).getValue())).getValue();
          RexBuilder builder = new RexBuilder(factory);

          // construct the new function name based on the input argument
          String newFunctionName = functionName + literal;

          // Look up the new function name in the drill operator table
          List<SqlOperator> operatorList = table.getSqlOperator(newFunctionName);
          assert operatorList.size() > 0;
          SqlFunction newFunction = null;

          // Find the SqlFunction with the correct args
          for (SqlOperator op : operatorList) {
            if (op.getOperandTypeChecker().getOperandCountRange().isValidCount(nArgs - 1)) {
              newFunction = (SqlFunction) op;
              break;
            }
          }
          assert newFunction != null;

          // create the new expression to be used in the rewritten project
          newExpr = builder.makeCall(newFunction, function.getOperands().subList(0, 1));
          rewrite = true;
        }
      }
      exprList.add(newExpr);
    }
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      return prel;
    }
   
    RelDataType t = prel.getRowType();

    RexBuilder b = prel.getCluster().getRexBuilder();
    List<RexNode> projections = Lists.newArrayList();
    int projectCount = t.getFieldList().size();

    // no point in reordering if we only have one column
    if(projectCount < 2) return prel;

    for(int i =0; i < projectCount; i++){
      projections.add(b.makeInputRef(prel, i));
    }
    return new ProjectPrel(prel.getCluster(), prel.getTraitSet(), prel, projections, prel.getRowType());
  }
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Related Classes of org.eigenbase.rex.RexBuilder

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  • net.hydromatic.optiq.prepare.LixToRelTranslator
  • net.hydromatic.optiq.prepare.OptiqPrepareImpl
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  • net.hydromatic.optiq.prepare.PlannerImpl
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  • org.apache.drill.exec.planner.logical.DrillJoinRule
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  • org.apache.drill.exec.planner.logical.RewriteProjectRel
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