Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22043#discussion_r208899867
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DataSourceV2AnalysisSuite.scala
---
@@ -0,0 +1,411 @@
+/*
+ * 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.analysis
+
+import java.util.Locale
+
+import org.apache.spark.sql.catalyst.expressions.{Alias,
AttributeReference, Cast, UpCast}
+import org.apache.spark.sql.catalyst.plans.logical.{AppendData, LeafNode,
LogicalPlan, Project}
+import org.apache.spark.sql.types.{DoubleType, FloatType, StructField,
StructType}
+
+case class TestRelation(output: Seq[AttributeReference]) extends LeafNode
with NamedRelation {
+ override def name: String = "table-name"
+}
+
+class DataSourceV2AnalysisSuite extends AnalysisTest {
+ val table = TestRelation(StructType(Seq(
+ StructField("x", FloatType),
+ StructField("y", FloatType))).toAttributes)
+
+ val requiredTable = TestRelation(StructType(Seq(
+ StructField("x", FloatType, nullable = false),
+ StructField("y", FloatType, nullable = false))).toAttributes)
+
+ val widerTable = TestRelation(StructType(Seq(
+ StructField("x", DoubleType),
+ StructField("y", DoubleType))).toAttributes)
+
+ test("Append.byName: basic behavior") {
+ val query = TestRelation(table.schema.toAttributes)
+
+ val parsedPlan = AppendData.byName(table, query)
+
+ checkAnalysis(parsedPlan, parsedPlan)
+ assertResolved(parsedPlan)
+ }
+
+ test("Append.byName: does not match by position") {
+ val query = TestRelation(StructType(Seq(
+ StructField("a", FloatType),
+ StructField("b", FloatType))).toAttributes)
+
+ val parsedPlan = AppendData.byName(table, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot find data for output column", "'x'", "'y'"))
+ }
+
+ test("Append.byName: case sensitive column resolution") {
+ val query = TestRelation(StructType(Seq(
+ StructField("X", FloatType), // doesn't match case!
+ StructField("y", FloatType))).toAttributes)
+
+ val parsedPlan = AppendData.byName(table, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot find data for output column", "'x'"))
+ }
+
+ test("Append.byName: case insensitive column resolution") {
+ val query = TestRelation(StructType(Seq(
+ StructField("X", FloatType), // doesn't match case!
+ StructField("y", FloatType))).toAttributes)
+
+ val X = query.output.toIndexedSeq(0)
+ val y = query.output.toIndexedSeq(1)
+
+ val parsedPlan = AppendData.byName(table, query)
+ val expectedPlan = AppendData.byName(table,
+ Project(Seq(
+ Alias(Cast(toLower(X), FloatType,
Some(conf.sessionLocalTimeZone)), "x")(),
+ Alias(Cast(y, FloatType, Some(conf.sessionLocalTimeZone)), "y")()),
+ query))
+
+ assertNotResolved(parsedPlan)
+ checkAnalysis(parsedPlan, expectedPlan, caseSensitive = false)
+ assertResolved(expectedPlan)
+ }
+
+ test("Append.byName: data columns are reordered by name") {
+ // out of order
+ val query = TestRelation(StructType(Seq(
+ StructField("y", FloatType),
+ StructField("x", FloatType))).toAttributes)
+
+ val y = query.output.toIndexedSeq(0)
+ val x = query.output.toIndexedSeq(1)
+
+ val parsedPlan = AppendData.byName(table, query)
+ val expectedPlan = AppendData.byName(table,
+ Project(Seq(
+ Alias(Cast(x, FloatType, Some(conf.sessionLocalTimeZone)), "x")(),
+ Alias(Cast(y, FloatType, Some(conf.sessionLocalTimeZone)), "y")()),
+ query))
+
+ assertNotResolved(parsedPlan)
+ checkAnalysis(parsedPlan, expectedPlan)
+ assertResolved(expectedPlan)
+ }
+
+ test("Append.byName: fail nullable data written to required columns") {
+ val parsedPlan = AppendData.byName(requiredTable, table)
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot write nullable values to non-null column", "'x'", "'y'"))
+ }
+
+ test("Append.byName: allow required data written to nullable columns") {
+ val parsedPlan = AppendData.byName(table, requiredTable)
+ assertResolved(parsedPlan)
+ checkAnalysis(parsedPlan, parsedPlan)
+ }
+
+ test("Append.byName: missing columns are identified by name") {
+ // missing optional field x
+ val query = TestRelation(StructType(Seq(
+ StructField("y", FloatType))).toAttributes)
+
+ val parsedPlan = AppendData.byName(table, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot find data for output column", "'x'"))
+ }
+
+ test("Append.byName: missing required columns cause failure and are
identified by name") {
+ // missing required field x
+ val query = TestRelation(StructType(Seq(
+ StructField("y", FloatType, nullable = false))).toAttributes)
+
+ val parsedPlan = AppendData.byName(requiredTable, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot find data for output column", "'x'"))
+ }
+
+ test("Append.byName: missing optional columns cause failure and are
identified by name") {
+ // missing optional field x
+ val query = TestRelation(StructType(Seq(
+ StructField("y", FloatType))).toAttributes)
+
+ val parsedPlan = AppendData.byName(table, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot find data for output column", "'x'"))
+ }
+
+ test("Append.byName: fail canWrite check") {
+ val parsedPlan = AppendData.byName(table, widerTable)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write", "'table-name'",
+ "Cannot safely cast", "'x'", "'y'", "DoubleType to FloatType"))
+ }
+
+ test("Append.byName: insert safe cast") {
+ val x = table.output.toIndexedSeq(0)
+ val y = table.output.toIndexedSeq(1)
+
+ val parsedPlan = AppendData.byName(widerTable, table)
+ val expectedPlan = AppendData.byName(widerTable,
+ Project(Seq(
+ Alias(Cast(x, DoubleType, Some(conf.sessionLocalTimeZone)), "x")(),
+ Alias(Cast(y, DoubleType, Some(conf.sessionLocalTimeZone)),
"y")()),
+ table))
+
+ assertNotResolved(parsedPlan)
+ checkAnalysis(parsedPlan, expectedPlan)
+ assertResolved(expectedPlan)
+ }
+
+ test("Append.byName: fail extra data fields") {
+ val query = TestRelation(StructType(Seq(
+ StructField("x", FloatType),
+ StructField("y", FloatType),
+ StructField("z", FloatType))).toAttributes)
+
+ val parsedPlan = AppendData.byName(table, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write", "'table-name'", "too many data columns",
+ "Table columns: 'x', 'y'",
+ "Data columns: 'x', 'y', 'z'"))
+ }
+
+ test("Append.byName: multiple field errors are reported") {
+ val xRequiredTable = TestRelation(StructType(Seq(
+ StructField("x", FloatType, nullable = false),
+ StructField("y", DoubleType))).toAttributes)
+
+ val query = TestRelation(StructType(Seq(
+ StructField("x", DoubleType),
+ StructField("b", FloatType))).toAttributes)
+
+ val parsedPlan = AppendData.byName(xRequiredTable, query)
+
+ assertNotResolved(parsedPlan)
+ assertAnalysisError(parsedPlan, Seq(
+ "Cannot write incompatible data to table", "'table-name'",
+ "Cannot safely cast", "'x'", "DoubleType to FloatType",
+ "Cannot write nullable values to non-null column", "'x'",
+ "Cannot find data for output column", "'y'"))
+ }
+
+ test("Append.byPosition: basic behavior") {
+ val query = TestRelation(StructType(Seq(
+ StructField("a", FloatType),
+ StructField("b", FloatType))).toAttributes)
+
+ val a = query.output.toIndexedSeq(0)
+ val b = query.output.toIndexedSeq(1)
+
+ val parsedPlan = AppendData.byPosition(table, query)
+ val expectedPlan = AppendData.byPosition(table,
+ Project(Seq(
+ Alias(Cast(a, FloatType, Some(conf.sessionLocalTimeZone)), "x")(),
+ Alias(Cast(b, FloatType, Some(conf.sessionLocalTimeZone)), "y")()),
+ query))
+
+ assertNotResolved(parsedPlan)
+ checkAnalysis(parsedPlan, expectedPlan, caseSensitive = false)
+ assertResolved(expectedPlan)
+ }
+
+ test("Append.byPosition: case does not fail column resolution") {
--- End diff --
do we need this test? In "Append.byPosition: basic behavior" we proved that
we can do append even the column names are different.
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