| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hive.metastore; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.hive.metastore.utils.StringUtils; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Constants and utility functions for column types. This is explicitly done as constants in the |
| * class rather than an enum in order to interoperate with Hive's old serdeConstants. All type |
| * names in this class match the type names in Hive's serdeConstants class. They must continue |
| * to do so. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class ColumnType { |
| public static final String VOID_TYPE_NAME = "void"; |
| |
| public static final String BOOLEAN_TYPE_NAME = "boolean"; |
| |
| public static final String TINYINT_TYPE_NAME = "tinyint"; |
| |
| public static final String SMALLINT_TYPE_NAME = "smallint"; |
| |
| public static final String INT_TYPE_NAME = "int"; |
| |
| public static final String BIGINT_TYPE_NAME = "bigint"; |
| |
| public static final String FLOAT_TYPE_NAME = "float"; |
| |
| public static final String DOUBLE_TYPE_NAME = "double"; |
| |
| public static final String STRING_TYPE_NAME = "string"; |
| |
| public static final String CHAR_TYPE_NAME = "char"; |
| |
| public static final String VARCHAR_TYPE_NAME = "varchar"; |
| |
| public static final String DATE_TYPE_NAME = "date"; |
| |
| public static final String DATETIME_TYPE_NAME = "datetime"; |
| |
| public static final String TIMESTAMP_TYPE_NAME = "timestamp"; |
| |
| public static final String DECIMAL_TYPE_NAME = "decimal"; |
| |
| public static final String BINARY_TYPE_NAME = "binary"; |
| |
| public static final String INTERVAL_YEAR_MONTH_TYPE_NAME = "interval_year_month"; |
| |
| public static final String INTERVAL_DAY_TIME_TYPE_NAME = "interval_day_time"; |
| |
| public static final String TIMESTAMPTZ_TYPE_NAME = "timestamp with time zone"; |
| |
| public static final String LIST_TYPE_NAME = "array"; |
| |
| public static final String MAP_TYPE_NAME = "map"; |
| |
| public static final String STRUCT_TYPE_NAME = "struct"; |
| |
| public static final String UNION_TYPE_NAME = "uniontype"; |
| |
| public static final String LIST_COLUMNS = "columns"; |
| |
| public static final String LIST_COLUMN_TYPES = "columns.types"; |
| |
| public static final String COLUMN_NAME_DELIMITER = "column.name.delimiter"; |
| |
| public static final Set<String> PrimitiveTypes = StringUtils.asSet( |
| VOID_TYPE_NAME, |
| BOOLEAN_TYPE_NAME, |
| TINYINT_TYPE_NAME, |
| SMALLINT_TYPE_NAME, |
| INT_TYPE_NAME, |
| BIGINT_TYPE_NAME, |
| FLOAT_TYPE_NAME, |
| DOUBLE_TYPE_NAME, |
| STRING_TYPE_NAME, |
| VARCHAR_TYPE_NAME, |
| CHAR_TYPE_NAME, |
| DATE_TYPE_NAME, |
| DATETIME_TYPE_NAME, |
| TIMESTAMP_TYPE_NAME, |
| INTERVAL_YEAR_MONTH_TYPE_NAME, |
| INTERVAL_DAY_TIME_TYPE_NAME, |
| DECIMAL_TYPE_NAME, |
| BINARY_TYPE_NAME, |
| TIMESTAMPTZ_TYPE_NAME); |
| |
| public static final Set<String> StringTypes = StringUtils.asSet( |
| STRING_TYPE_NAME, |
| VARCHAR_TYPE_NAME, |
| CHAR_TYPE_NAME |
| ); |
| |
| public static final Set<String> NumericTypes = StringUtils.asSet( |
| TINYINT_TYPE_NAME, |
| SMALLINT_TYPE_NAME, |
| INT_TYPE_NAME, |
| BIGINT_TYPE_NAME, |
| FLOAT_TYPE_NAME, |
| DOUBLE_TYPE_NAME, |
| DECIMAL_TYPE_NAME |
| ); |
| |
| // This intentionally does not include interval types. |
| public static final Set<String> DateTimeTypes = StringUtils.asSet( |
| DATE_TYPE_NAME, |
| DATETIME_TYPE_NAME, |
| TIMESTAMP_TYPE_NAME, |
| TIMESTAMPTZ_TYPE_NAME |
| ); |
| |
| // This map defines the progression of up casts in numeric types. |
| public static final Map<String, Integer> NumericCastOrder; |
| |
| static { |
| Map<String, Integer> map = new HashMap<>(); |
| map.put(TINYINT_TYPE_NAME, 1); |
| map.put(SMALLINT_TYPE_NAME, 2); |
| map.put(INT_TYPE_NAME, 3); |
| map.put(BIGINT_TYPE_NAME, 4); |
| map.put(DECIMAL_TYPE_NAME, 5); |
| map.put(FLOAT_TYPE_NAME, 6); |
| map.put(DOUBLE_TYPE_NAME, 7); |
| NumericCastOrder = Collections.unmodifiableMap(map); |
| } |
| |
| private static final Set<String> decoratedTypeNames = new HashSet<>(); |
| |
| static { |
| decoratedTypeNames.add("char"); |
| decoratedTypeNames.add("decimal"); |
| decoratedTypeNames.add("varchar"); |
| } |
| |
| private static final Map<String, String> alternateTypeNames = new HashMap<>(); |
| |
| static { |
| alternateTypeNames.put("integer", INT_TYPE_NAME); |
| alternateTypeNames.put("numeric", DECIMAL_TYPE_NAME); |
| } |
| |
| public static final Set<String> CollectionTypes = StringUtils.asSet( |
| LIST_TYPE_NAME, |
| MAP_TYPE_NAME); |
| |
| public static final Set<String> IntegralTypes = StringUtils.asSet( |
| TINYINT_TYPE_NAME, |
| SMALLINT_TYPE_NAME, |
| INT_TYPE_NAME, |
| BIGINT_TYPE_NAME); |
| |
| public static final Set<String> AllTypes = StringUtils.asSet( |
| VOID_TYPE_NAME, |
| BOOLEAN_TYPE_NAME, |
| TINYINT_TYPE_NAME, |
| SMALLINT_TYPE_NAME, |
| INT_TYPE_NAME, |
| BIGINT_TYPE_NAME, |
| FLOAT_TYPE_NAME, |
| DOUBLE_TYPE_NAME, |
| STRING_TYPE_NAME, |
| CHAR_TYPE_NAME, |
| VARCHAR_TYPE_NAME, |
| DATE_TYPE_NAME, |
| DATETIME_TYPE_NAME, |
| TIMESTAMP_TYPE_NAME, |
| DECIMAL_TYPE_NAME, |
| BINARY_TYPE_NAME, |
| INTERVAL_YEAR_MONTH_TYPE_NAME, |
| INTERVAL_DAY_TIME_TYPE_NAME, |
| TIMESTAMPTZ_TYPE_NAME, |
| LIST_TYPE_NAME, |
| MAP_TYPE_NAME, |
| STRUCT_TYPE_NAME, |
| UNION_TYPE_NAME, |
| LIST_COLUMNS, |
| LIST_COLUMN_TYPES, |
| COLUMN_NAME_DELIMITER |
| ); |
| |
| /** |
| * Given a type string return the type name. For example, passing in the type string |
| * <tt>varchar(256)</tt> will return <tt>varchar</tt>. |
| * @param typeString Type string |
| * @return type name, guaranteed to be in lower case |
| */ |
| public static String getTypeName(String typeString) { |
| if (typeString == null) return null; |
| String protoType = typeString.toLowerCase().split("\\W")[0]; |
| if (decoratedTypeNames.contains(protoType)) { |
| return protoType; |
| } |
| String realType = alternateTypeNames.get(protoType); |
| return realType == null ? protoType : realType; |
| } |
| |
| public static boolean areColTypesCompatible(String from, String to) { |
| if (from.equals(to)) return true; |
| |
| if (PrimitiveTypes.contains(from) && PrimitiveTypes.contains(to)) { |
| // They aren't the same, but we may be able to do a cast |
| |
| // If they are both types of strings, that should be fine |
| if (StringTypes.contains(from) && StringTypes.contains(to)) return true; |
| |
| // If both are numeric, make sure the new type is larger than the old. |
| if (NumericTypes.contains(from) && NumericTypes.contains(to)) { |
| return NumericCastOrder.get(from) < NumericCastOrder.get(to); |
| } |
| |
| // Void can go to anything |
| if (from.equals(VOID_TYPE_NAME)) return true; |
| |
| // Allow date to string casts. NOTE: I suspect this is the reverse of what we actually |
| // want, but it matches the code in o.a.h.h.serde2.typeinfo.TypeInfoUtils. I can't see how |
| // users would be altering date columns into string columns. The other I easily see since |
| // Hive did not originally support datetime types. Also, the comment in the Hive code |
| // says string to date, even though the code does the opposite. But for now I'm keeping |
| // this as is so the functionality matches. |
| if (DateTimeTypes.contains(from) && StringTypes.contains(to)) return true; |
| |
| // Allow numeric to string |
| if (NumericTypes.contains(from) && StringTypes.contains(to)) return true; |
| |
| } |
| return false; |
| } |
| |
| // These aren't column types, they are info for how things are stored in thrift. |
| // It didn't seem useful to create another Constants class just for these though. |
| public static final String SERIALIZATION_FORMAT = "serialization.format"; |
| |
| public static final String SERIALIZATION_LIB = "serialization.lib"; |
| |
| public static final String SERIALIZATION_DDL = "serialization.ddl"; |
| |
| public static final char COLUMN_COMMENTS_DELIMITER = '\0'; |
| |
| private static HashMap<String, String> typeToThriftTypeMap; |
| static { |
| typeToThriftTypeMap = new HashMap<>(); |
| typeToThriftTypeMap.put(BOOLEAN_TYPE_NAME, "bool"); |
| typeToThriftTypeMap.put(TINYINT_TYPE_NAME, "byte"); |
| typeToThriftTypeMap.put(SMALLINT_TYPE_NAME, "i16"); |
| typeToThriftTypeMap.put(INT_TYPE_NAME, "i32"); |
| typeToThriftTypeMap.put(BIGINT_TYPE_NAME, "i64"); |
| typeToThriftTypeMap.put(DOUBLE_TYPE_NAME, "double"); |
| typeToThriftTypeMap.put(FLOAT_TYPE_NAME, "float"); |
| typeToThriftTypeMap.put(LIST_TYPE_NAME, "list"); |
| typeToThriftTypeMap.put(MAP_TYPE_NAME, "map"); |
| typeToThriftTypeMap.put(STRING_TYPE_NAME, "string"); |
| typeToThriftTypeMap.put(BINARY_TYPE_NAME, "binary"); |
| // These 4 types are not supported yet. |
| // We should define a complex type date in thrift that contains a single int |
| // member, and DynamicSerDe |
| // should convert it to date type at runtime. (note: DynamicSerDe has been removed) |
| typeToThriftTypeMap.put(DATE_TYPE_NAME, "date"); |
| typeToThriftTypeMap.put(DATETIME_TYPE_NAME, "datetime"); |
| typeToThriftTypeMap.put(TIMESTAMP_TYPE_NAME, "timestamp"); |
| typeToThriftTypeMap.put(DECIMAL_TYPE_NAME, "decimal"); |
| typeToThriftTypeMap.put(INTERVAL_YEAR_MONTH_TYPE_NAME, INTERVAL_YEAR_MONTH_TYPE_NAME); |
| typeToThriftTypeMap.put(INTERVAL_DAY_TIME_TYPE_NAME, INTERVAL_DAY_TIME_TYPE_NAME); |
| } |
| |
| /** |
| * Convert type to ThriftType. We do that by tokenizing the type and convert |
| * each token. |
| */ |
| public static String typeToThriftType(String type) { |
| StringBuilder thriftType = new StringBuilder(); |
| int last = 0; |
| boolean lastAlphaDigit = Character.isLetterOrDigit(type.charAt(last)); |
| for (int i = 1; i <= type.length(); i++) { |
| if (i == type.length() |
| || Character.isLetterOrDigit(type.charAt(i)) != lastAlphaDigit) { |
| String token = type.substring(last, i); |
| last = i; |
| String thriftToken = typeToThriftTypeMap.get(token); |
| thriftType.append(thriftToken == null ? token : thriftToken); |
| lastAlphaDigit = !lastAlphaDigit; |
| } |
| } |
| return thriftType.toString(); |
| } |
| |
| public static String getListType(String t) { |
| return "array<" + t + ">"; |
| } |
| } |