panbingkun commented on code in PR #47364: URL: https://github.com/apache/spark/pull/47364#discussion_r1746988827
########## sql/core/src/main/scala/org/apache/spark/sql/execution/command/ShowCollationsCommand.scala: ########## @@ -0,0 +1,82 @@ +/* + * 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.command + +import org.apache.spark.sql.{Row, SparkSession} +import org.apache.spark.sql.catalyst.analysis.ResolvedNamespace +import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference} +import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan +import org.apache.spark.sql.catalyst.util.CollationFactory.Collation +import org.apache.spark.sql.types.StringType + +/** + * A command for `SHOW COLLATIONS`. + * + * The syntax of this command is: + * {{{ + * SHOW identifier? COLLATIONS ((FROM | IN) ns=identifierReference)? (LIKE? pattern=stringLit); + * }}} + */ +case class ShowCollationsCommand( + ns: LogicalPlan, + userScope: Boolean, + systemScope: Boolean, + pattern: Option[String]) extends UnaryRunnableCommand { + + override val output: Seq[Attribute] = Seq( + AttributeReference("COLLATION_CATALOG", StringType, nullable = false)(), + AttributeReference("COLLATION_SCHEMA", StringType, nullable = false)(), + AttributeReference("COLLATION_NAME", StringType, nullable = false)(), + AttributeReference("LANGUAGE", StringType)(), + AttributeReference("COUNTRY", StringType)(), + AttributeReference("ACCENT_SENSITIVITY", StringType, nullable = false)(), + AttributeReference("CASE_SENSITIVITY", StringType, nullable = false)(), + AttributeReference("PAD_ATTRIBUTE", StringType, nullable = false)(), + AttributeReference("ICU_VERSION", StringType)()) + + override def run(sparkSession: SparkSession): Seq[Row] = { + val ResolvedNamespace(catalog, ns, _) = child + + val systemCollations: Seq[Collation] = if (systemScope) { + sparkSession.sessionState.catalog.listCollations(pattern) + } else Seq.empty + + val userCollations: Seq[Collation] = if (userScope) { Review Comment: ```sql (base) ➜ spark-community git:(show_collation_syntax) ✗ sh bin/spark-sql WARNING: Using incubator modules: jdk.incubator.vector Setting default log level to "WARN". To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel). Spark Web UI available at http://172.26.2.21:4040 Spark master: local[*], Application Id: local-1725623182529 spark-sql (default)> SHOW user collations; Time taken: 0.459 seconds spark-sql (default)> SHOW system collations; SYSTEM BUILTIN UNICODE ACCENT_SENSITIVE CASE_SENSITIVE NO_PAD 75.1.0.0 SYSTEM BUILTIN UNICODE_AI ACCENT_SENSITIVE CASE_INSENSITIVE NO_PAD 75.1.0.0 SYSTEM BUILTIN UNICODE_CI ACCENT_INSENSITIVE CASE_SENSITIVE NO_PAD 75.1.0.0 SYSTEM BUILTIN UNICODE_CI_AI ACCENT_INSENSITIVE CASE_INSENSITIVE NO_PAD 75.1.0.0 SYSTEM BUILTIN UTF8_BINARY NULL NULL ACCENT_SENSITIVE CASE_SENSITIVE NO_PAD NULL SYSTEM BUILTIN UTF8_LCASE NULL NULL ACCENT_SENSITIVE CASE_INSENSITIVE NO_PAD NULL ... ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
