Github user zzcclp commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/492#discussion_r94986558
--- Diff:
integration/spark/src/main/scala/org/apache/spark/sql/hive/CarbonAnalysisRules.scala
---
@@ -0,0 +1,173 @@
+/*
+ * 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.hive
+
+import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.CarbonTableIdentifierImplicit
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias,
UnresolvedFunction, UnresolvedRelation, UnresolvedStar}
+import org.apache.spark.sql.catalyst.expressions.Alias
+import org.apache.spark.sql.catalyst.plans.Inner
+import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.catalyst.rules._
+import org.apache.spark.sql.execution.command.ProjectForDeleteCommand
+import org.apache.spark.sql.execution.datasources.LogicalRelation
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants
+
+/**
+ * Insert into carbon table from other source
+ */
+object CarbonPreInsertionCasts extends Rule[LogicalPlan] {
+ def apply(plan: LogicalPlan): LogicalPlan = plan.transform {
+ // Wait until children are resolved.
+ case p: LogicalPlan if !p.childrenResolved => p
+
+ case p @ InsertIntoTable(relation: LogicalRelation, _, child, _, _)
+ if relation.relation.isInstanceOf[CarbonDatasourceRelation] =>
+ castChildOutput(p,
relation.relation.asInstanceOf[CarbonDatasourceRelation], child)
+ }
+
+ def castChildOutput(p: InsertIntoTable, relation:
CarbonDatasourceRelation, child: LogicalPlan)
+ : LogicalPlan = {
+ if (relation.carbonRelation.output.size > CarbonCommonConstants
+ .DEFAULT_MAX_NUMBER_OF_COLUMNS) {
+ sys
+ .error("Maximum supported column by carbon is:" +
CarbonCommonConstants
+ .DEFAULT_MAX_NUMBER_OF_COLUMNS
+ )
+ }
+ if (child.output.size >= relation.carbonRelation.output.size ) {
+ InsertIntoCarbonTable(relation, p.partition, p.child, p.overwrite,
p.ifNotExists)
+ } else {
+ sys.error("Cannot insert into target table because column number
are different")
+ }
+ }
+ }
+
+object CarbonIUDAnalysisRule extends Rule[LogicalPlan] {
+
+ var sqlContext: SQLContext = _
+
+ def init(sqlContext: SQLContext) {
+ this.sqlContext = sqlContext
+ }
+
+ private def processUpdateQuery(
+ table: UnresolvedRelation,
+ columns: List[String],
+ selectStmt: String,
+ filter: String): LogicalPlan = {
+ var includedDestColumns = false
+ var includedDestRelation = false
+ var addedTupleId = false
+
+ def prepareTargetReleation(relation: UnresolvedRelation): Subquery = {
+ val tupleId = UnresolvedAlias(Alias(UnresolvedFunction("getTupleId",
+ Seq.empty, isDistinct = false), "tupleId")())
+ val projList = Seq(
+ UnresolvedAlias(UnresolvedStar(table.alias)), tupleId)
+ // include tuple id and rest of the required columns in subqury
+ Subquery(table.alias.getOrElse(""), Project(projList, relation))
+ }
+ // get the un-analyzed logical plan
+ val targetTable = prepareTargetReleation(table)
+ val selectPlan = org.apache.spark.sql.SQLParser.parse(selectStmt,
sqlContext) transform {
+ case Project(projectList, child) if (!includedDestColumns) =>
+ includedDestColumns = true
+ if (projectList.size != columns.size) {
+ sys.error("Number of source and destination columns are not
matching")
+ }
+ val renamedProjectList = projectList.zip(columns).map{ case(attr,
col) =>
+ attr match {
+ case UnresolvedAlias(child) =>
+ UnresolvedAlias(Alias(child, col + "-updatedColumn")())
+ case _ => attr
+ }
+ }
+ val list = Seq(
+ UnresolvedAlias(UnresolvedStar(table.alias))) ++
renamedProjectList
+ Project(list, child)
+ case Filter(cond, child) if (!includedDestRelation) =>
+ includedDestRelation = true
+ Filter(cond, Join(child, targetTable, Inner, None))
+ case r @ UnresolvedRelation(t, a) if (!includedDestRelation &&
+ t != table.tableIdentifier) =>
+ includedDestRelation = true
+ Join(r, targetTable, Inner, None)
+ }
+ val updatedSelectPlan = if (!includedDestRelation) {
+ // special case to handle self join queries
+ // Eg. update tableName SET (column1) = (column1+1)
+ selectPlan transform {
+ case relation: UnresolvedRelation if (table.tableIdentifier ==
relation.tableIdentifier &&
+ addedTupleId == false) =>
+ addedTupleId = true
+ targetTable
+ }
+ } else {
+ selectPlan
+ }
+ val finalPlan = if (filter.length > 0) {
+ val alias = table.alias.getOrElse("")
+ var transformed: Boolean = false
+ // Create a dummy projection to include filter conditions
+ SQLParser.parse("select * from " +
+ table.tableIdentifier.mkString(".") + " " + alias + " " + filter,
sqlContext) transform {
+ case UnresolvedRelation(t, Some(a)) if (
+ !transformed && t == table.tableIdentifier && a == alias) =>
+ transformed = true
+ // Add the filter condition of update statement on destination
table
+ Subquery(alias, updatedSelectPlan)
+ }
+ } else {
+ updatedSelectPlan
+ }
+ val tid =
CarbonTableIdentifierImplicit.toTableIdentifier(table.tableIdentifier)
+ val tidSeq = Seq(getDB.getDatabaseName(tid.database, sqlContext),
tid.table)
+ val destinationTable = UnresolvedRelation(tidSeq, table.alias)
+ ProjectForUpdate(destinationTable, columns, Seq(finalPlan))
+ }
+
+ def processDeleteRecordsQuery(selectStmt: String, table:
UnresolvedRelation): LogicalPlan = {
+ val tid =
CarbonTableIdentifierImplicit.toTableIdentifier(table.tableIdentifier)
--- End diff --
As described above
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