remove unnecessary parameter

h2/src/main/org/h2/index/BaseIndex.java

@@ -243,8 +243,8 @@ public abstract class BaseIndex extends SchemaObjectBase implements Index {
         return 0;
     }
 
-    public boolean containsNullAndAllowMultipleNull(Session session, Row newRow) {
-        Mode mode = session.getDatabase().getMode();
+    public boolean containsNullAndAllowMultipleNull(SearchRow newRow) {
+        Mode mode = database.getMode();
         if (mode.uniqueIndexSingleNull) {
             return false;
         } else if (mode.uniqueIndexSingleNullExceptAllColumnsAreNull) {

h2/src/main/org/h2/index/BtreeIndex.java

@@ -191,7 +191,7 @@ public class BtreeIndex extends BaseIndex implements RecordReader {
         lastChange = 0;
         if (storage != null) {
             storage.getDiskFile().flush();
-            if (!database.getReadOnly()) {
+            if (!database.isReadOnly()) {
                 deletePage(session, head);
                 // if we log index changes now, then the index is consistent
                 // if we don't log index changes, then the index is only consistent
@@ -348,7 +348,7 @@ public class BtreeIndex extends BaseIndex implements RecordReader {
 
     private void flushHead(Session session) throws SQLException {
         updatePage(session, head);
-        if (!database.getLogIndexChanges() && !database.getReadOnly()) {
+        if (!database.getLogIndexChanges() && !database.isReadOnly()) {
             storage.flushRecord(head);
         }
         if (trace.isDebugEnabled()) {

h2/src/main/org/h2/index/BtreeLeaf.java

@@ -63,7 +63,7 @@ public class BtreeLeaf extends BtreePage {
             int comp = index.compareRows(row, newRow);
             if (comp == 0) {
                 if (index.indexType.getUnique()) {
-                    if (!index.containsNullAndAllowMultipleNull(session, newRow)) {
+                    if (!index.containsNullAndAllowMultipleNull(newRow)) {
                         throw index.getDuplicateKeyException();
                     }
                 }

h2/src/main/org/h2/index/BtreeNode.java

@@ -83,7 +83,7 @@ public class BtreeNode extends BtreePage {
             int comp = index.compareRows(row, newRow);
             if (comp == 0) {
                 if (index.indexType.getUnique()) {
-                    if (!index.containsNullAndAllowMultipleNull(session, newRow)) {
+                    if (!index.containsNullAndAllowMultipleNull(newRow)) {
                         throw index.getDuplicateKeyException();
                     }
                 }

h2/src/main/org/h2/index/Index.java

@@ -190,12 +190,11 @@ public interface Index extends SchemaObject {
      * allowed using the current compatibility mode for unique indexes. Note:
      * NULL behavior is complicated in SQL.
      *
-     * @param session the session
      * @param newRow the row to check
      * @return true if one of the columns is null and multiple nulls in unique
      *         indexes are allowed
      */
-    boolean containsNullAndAllowMultipleNull(Session session, Row newRow);
+    boolean containsNullAndAllowMultipleNull(SearchRow newRow);
 
     /**
      * Compare the positions of two rows.

h2/src/main/org/h2/index/MultiVersionIndex.java

@@ -237,8 +237,8 @@ public class MultiVersionIndex implements Index {
         return base.getType();
     }
 
-    public boolean containsNullAndAllowMultipleNull(Session session, Row newRow) {
-        return base.containsNullAndAllowMultipleNull(session, newRow);
+    public boolean containsNullAndAllowMultipleNull(SearchRow newRow) {
+        return base.containsNullAndAllowMultipleNull(newRow);
     }
 
     public void removeChildrenAndResources(Session session) throws SQLException {

h2/src/main/org/h2/index/TreeIndex.java

@@ -54,7 +54,7 @@ public class TreeIndex extends BaseIndex {
             int compare = compareRows(row, r);
             if (compare == 0) {
                 if (indexType.getUnique()) {
-                    if (!containsNullAndAllowMultipleNull(session, row)) {
+                    if (!containsNullAndAllowMultipleNull(row)) {
                         throw getDuplicateKeyException();
                     }
                 }