[GitHub] spark pull request: [SPARK-13078][SQL] Infrastructure for the inte...

[rxin <gi...@git.apache.org>]

Github user rxin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/10982#discussion_r51372473
  
    --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala ---
    @@ -0,0 +1,172 @@
    +/*
    + * 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.catalyst.catalog
    +
    +import org.apache.spark.sql.AnalysisException
    +
    +
    +/**
    + * Interface for the system catalog (of columns, partitions, tables, and databases).
    + *
    + * This is only used for non-temporary items, and implementations must be thread-safe as they
    + * can be accessed in multiple threads.
    + */
    +abstract class Catalog {
    +
    +  // --------------------------------------------------------------------------
    +  // Databases
    +  // --------------------------------------------------------------------------
    +
    +  def createDatabase(dbDefinition: Database, ifNotExists: Boolean): Unit
    +
    +  def dropDatabase(
    +    db: String,
    +    ignoreIfNotExists: Boolean,
    +    cascade: Boolean): Unit
    +
    +  def alterDatabase(db: String, dbDefinition: Database): Unit
    +
    +  def getDatabase(db: String): Database
    +
    +  def listDatabases(): Seq[String]
    +
    +  def listDatabases(pattern: String): Seq[String]
    +
    +  // --------------------------------------------------------------------------
    +  // Tables
    +  // --------------------------------------------------------------------------
    +
    +  def createTable(db: String, tableDefinition: Table, ifNotExists: Boolean): Unit
    +
    +  def dropTable(db: String, table: String, ignoreIfNotExists: Boolean): Unit
    +
    +  def renameTable(db: String, oldName: String, newName: String): Unit
    +
    +  def alterTable(db: String, table: String, tableDefinition: Table): Unit
    +
    +  def getTable(db: String, table: String): Table
    +
    +  def listTables(db: String): Seq[String]
    +
    +  def listTables(db: String, pattern: String): Seq[String]
    +
    +  // --------------------------------------------------------------------------
    +  // Partitions
    +  // --------------------------------------------------------------------------
    +
    +  // TODO: need more functions for partitioning.
    +
    +  def alterPartition(db: String, table: String, part: TablePartition): Unit
    +
    +  def alterPartitions(db: String, table: String, parts: Seq[TablePartition]): Unit
    +
    +  // --------------------------------------------------------------------------
    +  // Functions
    +  // --------------------------------------------------------------------------
    +
    +  def createFunction(db: String, funcDefinition: Function, ifNotExists: Boolean): Unit
    +
    +  def dropFunction(db: String, funcName: String): Unit
    +
    +  def alterFunction(db: String, funcName: String, funcDefinition: Function): Unit
    +
    +  def getFunction(db: String, funcName: String): Function
    +
    +  def listFunctions(db: String, pattern: String): Seq[String]
    +
    +}
    +
    +
    +/**
    + * A function defined in the catalog.
    + *
    + * @param name name of the function
    + * @param className fully qualified class name, e.g. "org.apache.spark.util.MyFunc"
    + */
    +case class Function(
    +  name: String,
    +  className: String
    +)
    +
    +
    +/**
    + * Storage format, used to describe how a partition or a table is stored.
    + */
    +case class StorageFormat(
    +  locationUri: String,
    +  inputFormat: String,
    +  outputFormat: String,
    +  serde: String,
    +  serdeProperties: Map[String, String]
    +)
    +
    +
    +/**
    + * A column in a table.
    + */
    +case class Column(
    +  name: String,
    +  dataType: String,
    +  nullable: Boolean,
    +  comment: String
    +)
    +
    +
    +/**
    + * A partition (Hive style) defined in the catalog.
    + *
    + * @param values values for the partition columns
    + * @param storage storage format of the partition
    + */
    +case class TablePartition(
    +  values: Seq[String],
    +  storage: StorageFormat
    +)
    --- End diff --
    
    That's already supported. StorageFormat defines locationUri


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