Beispiel #1
0
 /**
  * Returns whether the type of an array of expressions is compatible with a struct type.
  *
  * @param exprs Array of expressions
  * @param type Type
  * @param fail Whether to fail if there is a mismatch
  * @return Whether every expression has the same type as the corresponding member of the struct
  *     type
  * @see RelOptUtil#eq(String, RelDataType, String, RelDataType, boolean)
  */
 public static boolean compatibleTypes(RexNode[] exprs, RelDataType type, boolean fail) {
   final RelDataTypeField[] fields = type.getFields();
   if (exprs.length != fields.length) {
     assert !fail : "rowtype mismatches expressions";
     return false;
   }
   for (int i = 0; i < fields.length; i++) {
     final RelDataType exprType = exprs[i].getType();
     final RelDataType fieldType = fields[i].getType();
     if (!RelOptUtil.eq("type1", exprType, "type2", fieldType, fail)) {
       return false;
     }
   }
   return true;
 }
Beispiel #2
0
 /**
  * Returns whether the leading edge of a given array of expressions is wholly {@link RexInputRef}
  * objects with types corresponding to the underlying datatype.
  */
 public static boolean containIdentity(RexNode[] exprs, RelDataType rowType, boolean fail) {
   final RelDataTypeField[] fields = rowType.getFields();
   if (exprs.length < fields.length) {
     assert !fail : "exprs/rowType length mismatch";
     return false;
   }
   for (int i = 0; i < fields.length; i++) {
     if (!(exprs[i] instanceof RexInputRef)) {
       assert !fail : "expr[" + i + "] is not a RexInputRef";
       return false;
     }
     RexInputRef inputRef = (RexInputRef) exprs[i];
     if (inputRef.getIndex() != i) {
       assert !fail : "expr[" + i + "] has ordinal " + inputRef.getIndex();
       return false;
     }
     if (!RelOptUtil.eq("type1", exprs[i].getType(), "type2", fields[i].getType(), fail)) {
       return false;
     }
   }
   return true;
 }