Examples with ScalarFunctionImpl org.apache.calcite.schema.impl.ScalarFunctionImpl used on opensource projects

Example 1 with ScalarFunctionImpl

use of org.apache.calcite.schema.impl.ScalarFunctionImpl in project calcite by apache.

the class CalciteCatalogReader method infer.

private static SqlReturnTypeInference infer(final ScalarFunction function) {
    return new SqlReturnTypeInference() {

        public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
            final RelDataTypeFactory typeFactory = opBinding.getTypeFactory();
            final RelDataType type;
            if (function instanceof ScalarFunctionImpl) {
                type = ((ScalarFunctionImpl) function).getReturnType(typeFactory, opBinding);
            } else {
                type = function.getReturnType(typeFactory);
            }
            return toSql(typeFactory, type);
        }
    };
}