| /* |
| * 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. |
| */ |
| |
| package org.apache.spark.sql.execution.datasources.v2 |
| |
| import org.apache.spark.sql.catalyst.InternalRow |
| import org.apache.spark.sql.catalyst.analysis.ResolvedPartitionSpec |
| import org.apache.spark.sql.catalyst.catalog.ExternalCatalogUtils.escapePathName |
| import org.apache.spark.sql.catalyst.expressions.{Attribute, Cast, Literal} |
| import org.apache.spark.sql.connector.catalog.{SupportsPartitionManagement, TableCatalog} |
| import org.apache.spark.sql.execution.LeafExecNode |
| import org.apache.spark.sql.types.StringType |
| import org.apache.spark.unsafe.types.UTF8String |
| |
| /** |
| * Physical plan node for showing partitions. |
| */ |
| case class ShowPartitionsExec( |
| output: Seq[Attribute], |
| catalog: TableCatalog, |
| table: SupportsPartitionManagement, |
| partitionSpec: Option[ResolvedPartitionSpec]) extends V2CommandExec with LeafExecNode { |
| override protected def run(): Seq[InternalRow] = { |
| val (names, ident) = partitionSpec |
| .map(spec => (spec.names, spec.ident)) |
| // listPartitionByNames() should return all partitions if the partition spec |
| // does not specify any partition names. |
| .getOrElse((Seq.empty[String], InternalRow.empty)) |
| val partitionIdentifiers = table.listPartitionIdentifiers(names.toArray, ident) |
| // Converting partition identifiers as `InternalRow` of partition values, |
| // for instance InternalRow(value0, value1, ..., valueN), to `InternalRow`s |
| // with a string in the format: "col0=value0/col1=value1/.../colN=valueN". |
| val schema = table.partitionSchema() |
| val len = schema.length |
| val partitions = new Array[String](len) |
| val timeZoneId = conf.sessionLocalTimeZone |
| val output = partitionIdentifiers.map { row => |
| var i = 0 |
| while (i < len) { |
| val dataType = schema(i).dataType |
| val partValueUTF8String = |
| Cast(Literal(row.get(i, dataType), dataType), StringType, Some(timeZoneId)).eval() |
| val partValueStr = if (partValueUTF8String == null) "null" else partValueUTF8String.toString |
| partitions(i) = escapePathName(schema(i).name) + "=" + escapePathName(partValueStr) |
| i += 1 |
| } |
| partitions.mkString("/") |
| } |
| output.sorted.map(p => InternalRow(UTF8String.fromString(p))) |
| } |
| } |