namespace java org.apache.hadoop.hive.serde
namespace php org.apache.hadoop.hive.serde
namespace py org_apache_hadoop_hive_serde
namespace cpp Hive

  // name of serialization scheme.
const string SERIALIZATION_LIB = "serialization.lib"
const string SERIALIZATION_CLASS = "serialization.class"
const string SERIALIZATION_FORMAT = "serialization.format"
const string SERIALIZATION_DDL = "serialization.ddl"
const string SERIALIZATION_NULL_FORMAT = "serialization.null.format"
const string SERIALIZATION_LAST_COLUMN_TAKES_REST = "serialization.last.column.takes.rest"
const string SERIALIZATION_SORT_ORDER = "serialization.sort.order"
const string SERIALIZATION_USE_JSON_OBJECTS = "serialization.use.json.object"

const string FIELD_DELIM = "field.delim"
const string COLLECTION_DELIM = "colelction.delim"
const string LINE_DELIM = "line.delim"
const string MAPKEY_DELIM = "mapkey.delim"
const string QUOTE_CHAR = "quote.delim"
const string ESCAPE_CHAR = "escape.delim"

typedef string PrimitiveType
typedef string CollectionType

const string VOID_TYPE_NAME       = "void";
const string BOOLEAN_TYPE_NAME  = "boolean";
const string TINYINT_TYPE_NAME   = "tinyint";
const string SMALLINT_TYPE_NAME  = "smallint";
const string INT_TYPE_NAME       = "int";
const string BIGINT_TYPE_NAME    = "bigint";
const string FLOAT_TYPE_NAME     = "float";
const string DOUBLE_TYPE_NAME    = "double";
const string STRING_TYPE_NAME    = "string";
const string DATE_TYPE_NAME      = "date";
const string DATETIME_TYPE_NAME  = "datetime";
const string TIMESTAMP_TYPE_NAME = "timestamp";

const string LIST_TYPE_NAME = "array";
const string MAP_TYPE_NAME  = "map";
const string STRUCT_TYPE_NAME  = "struct";
const string UNION_TYPE_NAME  = "uniontype";

const string LIST_COLUMNS = "columns";
const string LIST_COLUMN_TYPES = "columns.types";

const set<string> PrimitiveTypes  = [ 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  DATE_TYPE_NAME DATETIME_TYPE_NAME TIMESTAMP_TYPE_NAME ],
const set<string> CollectionTypes = [ LIST_TYPE_NAME MAP_TYPE_NAME ],