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[SPARK-29219][SQL] Introduce SupportsCatalogOptions for TableProvider #26913
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@@ -0,0 +1,53 @@ | ||
/* | ||
* 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. | ||
*/ | ||
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package org.apache.spark.sql.connector.catalog; | ||
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import org.apache.spark.annotation.Evolving; | ||
import org.apache.spark.sql.util.CaseInsensitiveStringMap; | ||
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/** | ||
* An interface, which TableProviders can implement, to support table existence checks and creation | ||
* through a catalog, without having to use table identifiers. For example, when file based data | ||
* sources use the `DataFrameWriter.save(path)` method, the option `path` can translate to a | ||
* PathIdentifier. A catalog can then use this PathIdentifier to check the existence of a table, or | ||
* whether a table can be created at a given directory. | ||
*/ | ||
@Evolving | ||
public interface SupportsCatalogOptions extends TableProvider { | ||
/** | ||
* Return a {@link Identifier} instance that can identify a table for a DataSource given | ||
* DataFrame[Reader|Writer] options. | ||
* | ||
* @param options the user-specified options that can identify a table, e.g. file path, Kafka | ||
* topic name, etc. It's an immutable case-insensitive string-to-string map. | ||
*/ | ||
Identifier extractIdentifier(CaseInsensitiveStringMap options); | ||
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/** | ||
* Return the name of a catalog that can be used to check the existence of, load, and create | ||
* a table for this DataSource given the identifier that will be extracted by | ||
* {@link #extractIdentifier(CaseInsensitiveStringMap) extractIdentifier}. A `null` value can | ||
* be used to defer to the V2SessionCatalog. | ||
* | ||
* @param options the user-specified options that can identify a table, e.g. file path, Kafka | ||
* topic name, etc. It's an immutable case-insensitive string-to-string map. | ||
*/ | ||
default String extractCatalog(CaseInsensitiveStringMap options) { | ||
return null; | ||
} | ||
} |
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@@ -32,7 +32,7 @@ import org.apache.spark.sql.catalyst.csv.{CSVHeaderChecker, CSVOptions, Univocit | |
import org.apache.spark.sql.catalyst.expressions.ExprUtils | ||
import org.apache.spark.sql.catalyst.json.{CreateJacksonParser, JacksonParser, JSONOptions} | ||
import org.apache.spark.sql.catalyst.util.FailureSafeParser | ||
import org.apache.spark.sql.connector.catalog.SupportsRead | ||
import org.apache.spark.sql.connector.catalog.{CatalogV2Util, SupportsCatalogOptions, SupportsRead} | ||
import org.apache.spark.sql.connector.catalog.TableCapability._ | ||
import org.apache.spark.sql.execution.command.DDLUtils | ||
import org.apache.spark.sql.execution.datasources.DataSource | ||
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@@ -215,9 +215,19 @@ class DataFrameReader private[sql](sparkSession: SparkSession) extends Logging { | |
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val finalOptions = sessionOptions ++ extraOptions.toMap ++ pathsOption | ||
val dsOptions = new CaseInsensitiveStringMap(finalOptions.asJava) | ||
val table = userSpecifiedSchema match { | ||
case Some(schema) => provider.getTable(dsOptions, schema) | ||
case _ => provider.getTable(dsOptions) | ||
val table = provider match { | ||
case hasCatalog: SupportsCatalogOptions => | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. let's fail if the user specifies schema. |
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val ident = hasCatalog.extractIdentifier(dsOptions) | ||
val catalog = CatalogV2Util.getTableProviderCatalog( | ||
hasCatalog, | ||
sparkSession.sessionState.catalogManager, | ||
dsOptions) | ||
catalog.loadTable(ident) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. shall we always call There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. if we call There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. We don't, we simply ignore it. If the TableProvider SupportsCatalogOptions, then we will always load the table through the catalog, therefore we don't need user options or partitioning info There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. then shall we fail or log a warning if schema is specified by users? BTW There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. I don't have a strong opinion on whether to warn, fail, or ignore when there is a user-specified schema. Warnings are almost always ignored, so I'd rather fail and highlight the problem to the user. |
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case _ => | ||
userSpecifiedSchema match { | ||
case Some(schema) => provider.getTable(dsOptions, schema) | ||
case _ => provider.getTable(dsOptions) | ||
} | ||
} | ||
import org.apache.spark.sql.execution.datasources.v2.DataSourceV2Implicits._ | ||
table match { | ||
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@@ -28,7 +28,7 @@ import org.apache.spark.sql.catalyst.catalog._ | |
import org.apache.spark.sql.catalyst.expressions.Literal | ||
import org.apache.spark.sql.catalyst.plans.logical.{AppendData, CreateTableAsSelect, InsertIntoStatement, LogicalPlan, OverwriteByExpression, OverwritePartitionsDynamic, ReplaceTableAsSelect} | ||
import org.apache.spark.sql.catalyst.util.CaseInsensitiveMap | ||
import org.apache.spark.sql.connector.catalog.{CatalogPlugin, Identifier, SupportsWrite, TableCatalog, TableProvider, V1Table} | ||
import org.apache.spark.sql.connector.catalog.{CatalogPlugin, CatalogV2Util, Identifier, SupportsCatalogOptions, SupportsWrite, Table, TableCatalog, TableProvider, V1Table} | ||
import org.apache.spark.sql.connector.catalog.TableCapability._ | ||
import org.apache.spark.sql.connector.expressions.{BucketTransform, FieldReference, IdentityTransform, LiteralValue, Transform} | ||
import org.apache.spark.sql.execution.SQLExecution | ||
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@@ -258,37 +258,77 @@ final class DataFrameWriter[T] private[sql](ds: Dataset[T]) { | |
val dsOptions = new CaseInsensitiveStringMap(options.asJava) | ||
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import org.apache.spark.sql.execution.datasources.v2.DataSourceV2Implicits._ | ||
provider.getTable(dsOptions) match { | ||
case table: SupportsWrite if table.supports(BATCH_WRITE) => | ||
if (partitioningColumns.nonEmpty) { | ||
throw new AnalysisException("Cannot write data to TableProvider implementation " + | ||
"if partition columns are specified.") | ||
} | ||
lazy val relation = DataSourceV2Relation.create(table, dsOptions) | ||
mode match { | ||
case SaveMode.Append => | ||
runCommand(df.sparkSession, "save") { | ||
AppendData.byName(relation, df.logicalPlan, extraOptions.toMap) | ||
mode match { | ||
case SaveMode.Append | SaveMode.Overwrite => | ||
val table = provider match { | ||
case supportsExtract: SupportsCatalogOptions => | ||
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val ident = supportsExtract.extractIdentifier(dsOptions) | ||
val sessionState = df.sparkSession.sessionState | ||
val catalog = CatalogV2Util.getTableProviderCatalog( | ||
supportsExtract, sessionState.catalogManager, dsOptions) | ||
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catalog.loadTable(ident) | ||
case tableProvider: TableProvider => | ||
val t = tableProvider.getTable(dsOptions) | ||
if (t.supports(BATCH_WRITE)) { | ||
t | ||
} else { | ||
// Streaming also uses the data source V2 API. So it may be that the data source | ||
// implements v2, but has no v2 implementation for batch writes. In that case, we | ||
// fall back to saving as though it's a V1 source. | ||
return saveToV1Source() | ||
} | ||
} | ||
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val relation = DataSourceV2Relation.create(table, dsOptions) | ||
checkPartitioningMatchesV2Table(table) | ||
if (mode == SaveMode.Append) { | ||
runCommand(df.sparkSession, "save") { | ||
AppendData.byName(relation, df.logicalPlan, extraOptions.toMap) | ||
} | ||
} else { | ||
// Truncate the table. TableCapabilityCheck will throw a nice exception if this | ||
// isn't supported | ||
runCommand(df.sparkSession, "save") { | ||
OverwriteByExpression.byName( | ||
relation, df.logicalPlan, Literal(true), extraOptions.toMap) | ||
} | ||
} | ||
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case createMode => | ||
provider match { | ||
case supportsExtract: SupportsCatalogOptions => | ||
val ident = supportsExtract.extractIdentifier(dsOptions) | ||
val sessionState = df.sparkSession.sessionState | ||
val catalog = CatalogV2Util.getTableProviderCatalog( | ||
supportsExtract, sessionState.catalogManager, dsOptions) | ||
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val location = Option(dsOptions.get("path")).map(TableCatalog.PROP_LOCATION -> _) | ||
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case SaveMode.Overwrite if table.supportsAny(TRUNCATE, OVERWRITE_BY_FILTER) => | ||
// truncate the table | ||
runCommand(df.sparkSession, "save") { | ||
OverwriteByExpression.byName( | ||
relation, df.logicalPlan, Literal(true), extraOptions.toMap) | ||
CreateTableAsSelect( | ||
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catalog, | ||
ident, | ||
partitioningAsV2, | ||
df.queryExecution.analyzed, | ||
Map(TableCatalog.PROP_PROVIDER -> source) ++ location, | ||
extraOptions.toMap, | ||
ignoreIfExists = createMode == SaveMode.Ignore) | ||
} | ||
case tableProvider: TableProvider => | ||
if (tableProvider.getTable(dsOptions).supports(BATCH_WRITE)) { | ||
throw new AnalysisException(s"TableProvider implementation $source cannot be " + | ||
s"written with $createMode mode, please use Append or Overwrite " + | ||
"modes instead.") | ||
} else { | ||
// Streaming also uses the data source V2 API. So it may be that the data source | ||
// implements v2, but has no v2 implementation for batch writes. In that case, we | ||
// fallback to saving as though it's a V1 source. | ||
saveToV1Source() | ||
} | ||
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case other => | ||
throw new AnalysisException(s"TableProvider implementation $source cannot be " + | ||
s"written with $other mode, please use Append or Overwrite " + | ||
"modes instead.") | ||
} | ||
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// Streaming also uses the data source V2 API. So it may be that the data source implements | ||
// v2, but has no v2 implementation for batch writes. In that case, we fall back to saving | ||
// as though it's a V1 source. | ||
case _ => saveToV1Source() | ||
} | ||
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} else { | ||
saveToV1Source() | ||
} | ||
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@@ -504,14 +544,6 @@ final class DataFrameWriter[T] private[sql](ds: Dataset[T]) { | |
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private def saveAsTable(catalog: TableCatalog, ident: Identifier): Unit = { | ||
val partitioning = partitioningColumns.map { colNames => | ||
colNames.map(name => IdentityTransform(FieldReference(name))) | ||
}.getOrElse(Seq.empty[Transform]) | ||
val bucketing = bucketColumnNames.map { cols => | ||
Seq(BucketTransform(LiteralValue(numBuckets.get, IntegerType), cols.map(FieldReference(_)))) | ||
}.getOrElse(Seq.empty[Transform]) | ||
val partitionTransforms = partitioning ++ bucketing | ||
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val tableOpt = try Option(catalog.loadTable(ident)) catch { | ||
case _: NoSuchTableException => None | ||
} | ||
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@@ -526,13 +558,14 @@ final class DataFrameWriter[T] private[sql](ds: Dataset[T]) { | |
return saveAsTable(TableIdentifier(ident.name(), ident.namespace().headOption)) | ||
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case (SaveMode.Append, Some(table)) => | ||
checkPartitioningMatchesV2Table(table) | ||
AppendData.byName(DataSourceV2Relation.create(table), df.logicalPlan, extraOptions.toMap) | ||
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case (SaveMode.Overwrite, _) => | ||
ReplaceTableAsSelect( | ||
catalog, | ||
ident, | ||
partitionTransforms, | ||
partitioningAsV2, | ||
df.queryExecution.analyzed, | ||
Map(TableCatalog.PROP_PROVIDER -> source) ++ getLocationIfExists, | ||
extraOptions.toMap, | ||
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@@ -545,7 +578,7 @@ final class DataFrameWriter[T] private[sql](ds: Dataset[T]) { | |
CreateTableAsSelect( | ||
catalog, | ||
ident, | ||
partitionTransforms, | ||
partitioningAsV2, | ||
df.queryExecution.analyzed, | ||
Map(TableCatalog.PROP_PROVIDER -> source) ++ getLocationIfExists, | ||
extraOptions.toMap, | ||
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@@ -623,6 +656,30 @@ final class DataFrameWriter[T] private[sql](ds: Dataset[T]) { | |
CreateTable(tableDesc, mode, Some(df.logicalPlan))) | ||
} | ||
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/** Converts the provided partitioning and bucketing information to DataSourceV2 Transforms. */ | ||
private def partitioningAsV2: Seq[Transform] = { | ||
val partitioning = partitioningColumns.map { colNames => | ||
colNames.map(name => IdentityTransform(FieldReference(name))) | ||
}.getOrElse(Seq.empty[Transform]) | ||
val bucketing = bucketColumnNames.map { cols => | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. shall we call |
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Seq(BucketTransform(LiteralValue(numBuckets.get, IntegerType), cols.map(FieldReference(_)))) | ||
}.getOrElse(Seq.empty[Transform]) | ||
partitioning ++ bucketing | ||
} | ||
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/** | ||
* For V2 DataSources, performs if the provided partitioning matches that of the table. | ||
* Partitioning information is not required when appending data to V2 tables. | ||
*/ | ||
private def checkPartitioningMatchesV2Table(existingTable: Table): Unit = { | ||
val v2Partitions = partitioningAsV2 | ||
if (v2Partitions.isEmpty) return | ||
require(v2Partitions.sameElements(existingTable.partitioning()), | ||
"The provided partitioning does not match of the table.\n" + | ||
s" - provided: ${v2Partitions.mkString(", ")}\n" + | ||
s" - table: ${existingTable.partitioning().mkString(", ")}") | ||
} | ||
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/** | ||
* Saves the content of the `DataFrame` to an external database table via JDBC. In the case the | ||
* table already exists in the external database, behavior of this function depends on the | ||
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shall we by default return
CatalogManager.SESSION_CATALOG_NAME
instead of null?