How to use

createUnknownType

method

in

org.apache.calcite.rel.type.RelDataTypeFactory

/**
 * Creates a validator.
 *
 * @param opTab         Operator table
 * @param catalogReader Catalog reader
 * @param typeFactory   Type factory
 * @param conformance   Compatibility mode
 */
protected SqlValidatorImpl(
  SqlOperatorTable opTab,
  SqlValidatorCatalogReader catalogReader,
  RelDataTypeFactory typeFactory,
  SqlConformance conformance) {
  this.opTab = Objects.requireNonNull(opTab);
  this.catalogReader = Objects.requireNonNull(catalogReader);
  this.typeFactory = Objects.requireNonNull(typeFactory);
  this.conformance = Objects.requireNonNull(conformance);
  unknownType = typeFactory.createUnknownType();
  booleanType = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
  rewriteCalls = true;
  expandColumnReferences = true;
  aggFinder = new AggFinder(opTab, false, true, false, null);
  aggOrOverFinder = new AggFinder(opTab, true, true, false, null);
  overFinder = new AggFinder(opTab, true, false, false, aggOrOverFinder);
  groupFinder = new AggFinder(opTab, false, false, true, null);
  aggOrOverOrGroupFinder = new AggFinder(opTab, true, true, true, null);
}

/**
 * Creates a validator.
 *
 * @param opTab         Operator table
 * @param catalogReader Catalog reader
 * @param typeFactory   Type factory
 * @param conformance   Compatibility mode
 */
protected SqlValidatorImpl(
  SqlOperatorTable opTab,
  SqlValidatorCatalogReader catalogReader,
  RelDataTypeFactory typeFactory,
  SqlConformance conformance) {
 this.opTab = Objects.requireNonNull(opTab);
 this.catalogReader = Objects.requireNonNull(catalogReader);
 this.typeFactory = Objects.requireNonNull(typeFactory);
 this.conformance = Objects.requireNonNull(conformance);
 unknownType = typeFactory.createUnknownType();
 booleanType = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
 rewriteCalls = true;
 expandColumnReferences = true;
 aggFinder = new AggFinder(opTab, false, true, false, null);
 aggOrOverFinder = new AggFinder(opTab, true, true, false, null);
 overFinder = new AggFinder(opTab, true, false, false, aggOrOverFinder);
 groupFinder = new AggFinder(opTab, false, false, true, null);
 aggOrOverOrGroupFinder = new AggFinder(opTab, true, true, true, null);
}

/**
 * Creates a validator.
 *
 * @param opTab         Operator table
 * @param catalogReader Catalog reader
 * @param typeFactory   Type factory
 * @param conformance   Compatibility mode
 */
protected SqlValidatorImpl(
  SqlOperatorTable opTab,
  SqlValidatorCatalogReader catalogReader,
  RelDataTypeFactory typeFactory,
  SqlConformance conformance) {
 this.opTab = Objects.requireNonNull(opTab);
 this.catalogReader = Objects.requireNonNull(catalogReader);
 this.typeFactory = Objects.requireNonNull(typeFactory);
 this.conformance = Objects.requireNonNull(conformance);
 unknownType = typeFactory.createUnknownType();
 booleanType = typeFactory.createSqlType(SqlTypeName.BOOLEAN);
 rewriteCalls = true;
 expandColumnReferences = true;
 aggFinder = new AggFinder(opTab, false, true, false, null);
 aggOrOverFinder = new AggFinder(opTab, true, true, false, null);
 overFinder = new AggFinder(opTab, true, false, false, aggOrOverFinder);
 groupFinder = new AggFinder(opTab, false, false, true, null);
 aggOrOverOrGroupFinder = new AggFinder(opTab, true, true, true, null);
}