Add support CREATE SEQUENCE AS data type

src/main/java/net/sf/jsqlparser/schema/Sequence.java

@@ -9,13 +9,12 @@
  */
 package net.sf.jsqlparser.schema;
 
-import net.sf.jsqlparser.parser.ASTNodeAccessImpl;
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
+import net.sf.jsqlparser.parser.ASTNodeAccessImpl;
 
 /**
  * Represents the database type for a {@code SEQUENCE}
@@ -29,6 +28,7 @@ public class Sequence extends ASTNodeAccessImpl implements MultiPartName {
     private List<String> partItems = new ArrayList<>();
 
     private List<Parameter> parameters;
+    private String dataType;
 
     public Sequence() {}
 
@@ -45,6 +45,19 @@ public void setParameters(List<Parameter> parameters) {
         this.parameters = parameters;
     }
 
+    public String getDataType() {
+        return dataType;
+    }
+
+    public void setDataType(String dataType) {
+        this.dataType = dataType;
+    }
+
+    public Sequence withDataType(String dataType) {
+        this.setDataType(dataType);
+        return this;
+    }
+
     public Database getDatabase() {
         return new Database(getIndex(DATABASE_IDX));
     }
@@ -129,6 +142,9 @@ public String getUnquotedName() {
     @Override
     public String toString() {
         StringBuilder sql = new StringBuilder(getFullyQualifiedName());
+        if (dataType != null) {
+            sql.append(" AS ").append(dataType);
+        }
         if (parameters != null) {
             for (Sequence.Parameter parameter : parameters) {
                 sql.append(" ").append(parameter.formatParameter());

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -11500,9 +11500,11 @@ CreateSequence CreateSequence():
   CreateSequence createSequence = new CreateSequence();
   Sequence sequence;
   List<Sequence.Parameter> sequenceParameters;
+  Token dataType = null;
 }
 {
   <K_SEQUENCE> sequence=Sequence() { createSequence.setSequence(sequence); }
+  [ <K_AS> ( dataType=<S_IDENTIFIER> | dataType=<DATA_TYPE> ) { sequence.setDataType(dataType.image); } ]
   sequenceParameters = SequenceParameters()
     {
         sequence.setParameters(sequenceParameters);

src/test/java/net/sf/jsqlparser/statement/create/CreateSequenceTest.java

@@ -9,13 +9,14 @@
  */
 package net.sf.jsqlparser.statement.create;
 
+import static net.sf.jsqlparser.test.TestUtils.*;
+
 import net.sf.jsqlparser.JSQLParserException;
 import net.sf.jsqlparser.schema.Database;
 import net.sf.jsqlparser.schema.Sequence;
 import net.sf.jsqlparser.schema.Sequence.Parameter;
 import net.sf.jsqlparser.schema.Sequence.ParameterType;
 import net.sf.jsqlparser.statement.create.sequence.CreateSequence;
-import static net.sf.jsqlparser.test.TestUtils.*;
 import org.junit.jupiter.api.Test;
 
 public class CreateSequenceTest {
@@ -143,4 +144,20 @@ public void testCreateSequence_preservesParamOrder() throws JSQLParserException
                 statement);
     }
 
+    @Test
+    public void testCreateSequence_withAsDataType() throws JSQLParserException {
+        String statement =
+                "CREATE SEQUENCE public.activites_activite_id_seq AS integer START WITH 1 INCREMENT BY 1 NOMINVALUE NOMAXVALUE CACHE 1";
+        assertSqlCanBeParsedAndDeparsed(statement);
+    }
+
+    @Test
+    public void testCreateSequence_withAsDataTypeSimple() throws JSQLParserException {
+        String statement = "CREATE SEQUENCE my_seq AS integer";
+        assertSqlCanBeParsedAndDeparsed(statement);
+        assertDeparse(new CreateSequence().withSequence(
+                new Sequence().withName("my_seq").withDataType("integer")),
+                statement);
+    }
+
 }