diff --git a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIPreparedNamedStatement.java b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIPreparedNamedStatement.java
index f2fefeb363..9dadddf7c0 100644
--- a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIPreparedNamedStatement.java
+++ b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIPreparedNamedStatement.java
@@ -39,6 +39,7 @@ public class PIPreparedNamedStatement extends PIPreparedStatement {
     @Setter
     private PolyImplementation implementation;
     @Getter
+    @Setter
     private Statement statement;
     private final NamedValueProcessor namedValueProcessor;
 
diff --git a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIStatement.java b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIStatement.java
index d31ca34a07..cab7974762 100644
--- a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIStatement.java
+++ b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIStatement.java
@@ -74,6 +74,8 @@ public void closeResults() {
 
     public abstract void setImplementation( PolyImplementation implementation );
 
+    public abstract void setStatement( Statement statement );
+
     public abstract Statement getStatement();
 
     public abstract String getQuery();
diff --git a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIUnparameterizedStatement.java b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIUnparameterizedStatement.java
index 7229b2d2f0..1ce4d162df 100644
--- a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIUnparameterizedStatement.java
+++ b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/PIUnparameterizedStatement.java
@@ -33,6 +33,7 @@
 public class PIUnparameterizedStatement extends PIStatement {
 
     private final String query;
+    @Setter
     private Statement statement;
     @Setter
     private PolyImplementation implementation;
diff --git a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/StatementManager.java b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/StatementManager.java
index 354b73f54e..b023c2daa2 100644
--- a/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/StatementManager.java
+++ b/plugins/prism-interface/src/main/java/org/polypheny/db/prisminterface/statements/StatementManager.java
@@ -17,6 +17,7 @@
 package org.polypheny.db.prisminterface.statements;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -28,6 +29,7 @@
 import org.polypheny.db.languages.QueryLanguage;
 import org.polypheny.db.prisminterface.PIClient;
 import org.polypheny.db.prisminterface.PIServiceException;
+import org.polypheny.db.transaction.Statement;
 import org.polypheny.prism.ExecuteUnparameterizedStatementRequest;
 import org.polypheny.prism.PrepareStatementRequest;
 
@@ -36,8 +38,8 @@ public class StatementManager {
 
     private final AtomicInteger statementIdGenerator;
     private final PIClient client;
-    private ConcurrentHashMap<Integer, PIStatement> openStatements;
-    private ConcurrentHashMap<Integer, PIUnparameterizedStatementBatch> openUnparameterizedBatches;
+    private final Map<Integer, PIStatement> openStatements;
+    private final Map<Integer, PIUnparameterizedStatementBatch> openUnparameterizedBatches;
 
 
     public StatementManager( PIClient client ) {
@@ -190,25 +192,29 @@ public PIStatement getStatement( int statementId ) {
         if ( statement == null ) {
             throw new PIServiceException( "A statement with id " + statementId + " does not exist for that client" );
         }
+        Statement s = statement.getStatement();
+        if ( s != null && s.getTransaction().getId() != client.getOrCreateNewTransaction().getId() ) {
+            statement.setStatement( client.getCurrentTransaction().createStatement() );
+        }
         return statement;
     }
 
 
     public PIPreparedNamedStatement getNamedPreparedStatement( int statementId ) throws PIServiceException {
         PIStatement statement = getStatement( statementId );
-        if ( !(statement instanceof PIPreparedNamedStatement) ) {
+        if ( !(statement instanceof PIPreparedNamedStatement prepared) ) {
             throw new PIServiceException( "A named prepared statement with id " + statementId + " does not exist for that client" );
         }
-        return (PIPreparedNamedStatement) statement;
+        return prepared;
     }
 
 
     public PIPreparedIndexedStatement getIndexedPreparedStatement( int statementId ) throws PIServiceException {
         PIStatement statement = getStatement( statementId );
-        if ( !(statement instanceof PIPreparedIndexedStatement) ) {
+        if ( !(statement instanceof PIPreparedIndexedStatement prepared) ) {
             throw new PIServiceException( "A prepared indexed statement with id " + statementId + " does not exist for that client" );
         }
-        return (PIPreparedIndexedStatement) statement;
+        return prepared;
     }