2 files changed, 18 insertions, 7 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/Interpreter.java b/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/Interpreter.java
index 289f99d..6129f48 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/Interpreter.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/Interpreter.java
@@ -329,8 +329,13 @@ public class Interpreter {
         }
 
         public Result visit(CondExprAndC expr, Environment env) {
-            // TODO
-            throw new UnsupportedOperationException("CondExprAndC Not yet implemented");
+            try {
+                Result left = expr.condexpr_1.accept(new CondExprInterpreter(), env);
+                Result right = expr.condexpr_2.accept(new CondExprInterpreter(), env);
+                return left.and(right);
+            } catch(Exception exception) {
+                throw new InsideQueryException(PrettyPrinter.print(expr), exception);
+            }
         }
 
         public Result visit(CondExprNotC expr, Environment env) {
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/ResultColumn.java b/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/ResultColumn.java
index b551955..1c0db30 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/ResultColumn.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/interpreter/ResultColumn.java
@@ -4,6 +4,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import pl.edu.mimuw.cloudatlas.model.Type;
+import pl.edu.mimuw.cloudatlas.model.TypePrimitive;
 import pl.edu.mimuw.cloudatlas.model.TypeCollection;
 import pl.edu.mimuw.cloudatlas.model.Value;
 import pl.edu.mimuw.cloudatlas.model.ValueBoolean;
@@ -100,7 +101,7 @@ class ResultColumn extends Result {
 
     @Override
     public Result random(int size) {
-        return new ResultColumn(
+        return new ResultSingle(
             randomList(
                 new ValueList(
                     column,
@@ -124,13 +125,18 @@ class ResultColumn extends Result {
 
     @Override
     public ResultSingle isNull() {
-        throw new UnsupportedOperationException("Operation isNull not supported yet.");
-        // return new ResultSingle(new ValueBoolean(value.isNull()));
+        return new ResultSingle(new ValueBoolean(true));
     }
 
     @Override
     public Type getType() {
-        throw new UnsupportedOperationException("Operation getType not supported yet.");
-        // return value.getType();
+        Type type = TypePrimitive.NULL;
+        for (Value value : column) {
+            if (value.getType() != TypePrimitive.NULL) {
+                type = value.getType();
+            }
+        }
+
+        return type;
     }
 }