Examples of RexNode

org.eigenbase.rex.RexNode
Row expression.
Every row-expression has a type. (Compare with {@link org.eigenbase.sql.SqlNode}, which is created before validation, and therefore types may not be available.)

Some common row-expressions are: {@link RexLiteral} (constant value),{@link RexVariable} (variable), {@link RexCall} (call to operator withoperands). Expressions are generally created using a {@link RexBuilder}factory.

All sub-classes of RexNode are immutable.

Examples of org.eigenbase.rex.RexNode


    for (Ord<RexNode> node : Ord.zip(project.getProjects())) {
      if (node.e instanceof RexInputRef) {
        m.put( ((RexInputRef) node.e).getIndex(), node.i);
      } else if (node.e.isA(SqlKind.CAST)) {
        RexNode operand = ((RexCall) node.e).getOperands().get(0);
        if (operand instanceof RexInputRef) {
          m.put(
              ((RexInputRef) operand).getIndex(), node.i);
        }
      }

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