Exemple #1
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 public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
   assert opBinding.getOperandCount() == 1;
   final RelDataType multisetType = opBinding.getOperandType(0);
   RelDataType componentType = multisetType.getComponentType();
   assert componentType != null : "expected a multiset type: " + multisetType;
   final RelDataTypeFactory typeFactory = opBinding.getTypeFactory();
   final RelDataType type =
       typeFactory.builder().add(SqlUtil.deriveAliasFromOrdinal(0), componentType).build();
   return typeFactory.createMultisetType(type, -1);
 }
Exemple #2
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 public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
   assert opBinding.getOperandCount() == 1;
   final RelDataType recordMultisetType = opBinding.getOperandType(0);
   RelDataType multisetType = recordMultisetType.getComponentType();
   assert multisetType != null : "expected a multiset type: " + recordMultisetType;
   final List<RelDataTypeField> fields = multisetType.getFieldList();
   assert fields.size() > 0;
   final RelDataType firstColType = fields.get(0).getType();
   return opBinding.getTypeFactory().createMultisetType(firstColType, -1);
 }
Exemple #3
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        public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
          assert opBinding.getOperandCount() == 1;

          final RelDataType recordType = opBinding.getOperandType(0);

          boolean isStruct = recordType.isStruct();
          int fieldCount = recordType.getFieldCount();

          assert isStruct && (fieldCount == 1);

          RelDataTypeField fieldType = recordType.getFieldList().get(0);
          assert fieldType != null : "expected a record type with one field: " + recordType;
          final RelDataType firstColType = fieldType.getType();
          return opBinding.getTypeFactory().createTypeWithNullability(firstColType, true);
        }