[Parser Oracle] Support Create Trigger Statement (#29604)

* 27119 Support Create Trigger Parser in Oracle

format the code

format the code

* Move Create Trigger Statement into PLSQL.g4

parser/sql/dialect/oracle/src/main/antlr4/imports/oracle/PLSQL.g4

@@ -56,6 +56,10 @@ createFunction
     : CREATE (OR REPLACE)? (EDITIONABLE | NONEDITIONABLE)? FUNCTION plsqlFunctionSource
     ;
 
+createTrigger
+    : CREATE (OR REPLACE)? TRIGGER triggerName (BEFORE | AFTER | INSTEAD OF) dmlEventClause
+    ;
+
 plsqlFunctionSource
     : function (LP_ parameterDeclaration (COMMA_ parameterDeclaration)* RP_)? RETURN dataType
     sharingClause? (invokerRightsClause
@@ -274,3 +278,11 @@ pragma
 autonomousTransPragma
     : PRAGMA AUTONOMOUS_TRANSACTION SEMI_
     ;
+
+dmlEventClause
+    : dmlEventElement (OR dmlEventElement)* ON viewName
+    ;
+
+dmlEventElement
+    : (DELETE | INSERT | UPDATE) (OF LP_ columnName (COMMA_ columnName)* RP_)?
+    ;

parser/sql/dialect/oracle/src/main/antlr4/org/apache/shardingsphere/sql/parser/autogen/OracleStatement.g4

@@ -158,5 +158,6 @@ execute
     | createLibrary
     | switch
     | createProfile
+    | createTrigger
     ) SEMI_?
     ;

parser/sql/dialect/oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/statement/type/OracleDDLStatementVisitor.java

@@ -100,6 +100,7 @@
 import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CreateSynonymContext;
 import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CreateTableContext;
 import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CreateTablespaceContext;
+import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CreateTriggerContext;
 import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CreateTypeContext;
 import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.CreateViewContext;
 import org.apache.shardingsphere.sql.parser.autogen.OracleStatementParser.DataTypeDefinitionContext;
@@ -269,6 +270,7 @@
 import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleCreateSynonymStatement;
 import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleCreateTableStatement;
 import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleCreateTablespaceStatement;
+import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleCreateTriggerStatement;
 import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleCreateVarrayTypeStatement;
 import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleCreateViewStatement;
 import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl.OracleDisassociateStatisticsStatement;
@@ -762,6 +764,11 @@ public ASTNode visitDropTrigger(final DropTriggerContext ctx) {
         return new OracleDropTriggerStatement();
     }
 
+    @Override
+    public ASTNode visitCreateTrigger(final CreateTriggerContext ctx) {
+        return new OracleCreateTriggerStatement();
+    }
+
     @Override
     public ASTNode visitAlterTrigger(final AlterTriggerContext ctx) {
         return new OracleAlterTriggerStatement();

parser/sql/statement/src/main/java/org/apache/shardingsphere/sql/parser/sql/dialect/statement/oracle/ddl/OracleCreateTriggerStatement.java

@@ -0,0 +1,27 @@
+/*
+ * 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.shardingsphere.sql.parser.sql.dialect.statement.oracle.ddl;
+
+import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.CreateTriggerStatement;
+import org.apache.shardingsphere.sql.parser.sql.dialect.statement.oracle.OracleStatement;
+
+/**
+ * Oracle create trigger statement.
+ */
+public final class OracleCreateTriggerStatement extends CreateTriggerStatement implements OracleStatement {
+}

test/it/parser/src/main/resources/case/ddl/create-trigger.xml

@@ -23,4 +23,5 @@
 <!--    <create-trigger sql-case-id="create_trigger_with_when" />-->
 <!--    <create-trigger sql-case-id="create_trigger_after_update" />-->
     <create-trigger sql-case-id="create_trigger_with_create_view" />
+    <create-trigger sql-case-id="create_trigger_with_dml_event_clause" />
 </sql-parser-test-cases>

test/it/parser/src/main/resources/sql/supported/ddl/create-trigger.xml

@@ -28,4 +28,5 @@
             SELECT EVENTDATA()" db-types="SQLServer" />
 
     <sql-case id="create_trigger_with_create_view" value="CREATE TRIGGER tr1 BEFORE INSERT ON t1 FOR EACH ROW BEGIN create view v1 as select 1; END" db-types="MySQL" />
+    <sql-case id="create_trigger_with_dml_event_clause" value="CREATE TRIGGER scott.emp_permit_changes BEFORE DELETE OR INSERT OR UPDATE ON scott.emp" db-types="Oracle" />
 </sql-cases>