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types.R
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types.R
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# 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
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# 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.
#
# types.R. This file handles the data type mapping between Spark and R
# The primitive data types, where names(PRIMITIVE_TYPES) are Scala types whereas
# values are equivalent R types. This is stored in an environment to allow for
# more efficient look up (environments use hashmaps).
PRIMITIVE_TYPES <- as.environment(list(
"byte"="integer",
"tinyint"="integer",
"smallint"="integer",
"integer"="integer",
"bigint"="numeric",
"float"="numeric",
"double"="numeric",
"decimal"="numeric",
"string"="character",
"binary"="raw",
"boolean"="logical",
"timestamp"="POSIXct",
"date"="Date"))
# The complex data types. These do not have any direct mapping to R's types.
COMPLEX_TYPES <- list(
"map"=NA,
"array"=NA,
"struct"=NA)
# The full list of data types.
DATA_TYPES <- as.environment(c(as.list(PRIMITIVE_TYPES), COMPLEX_TYPES))