diff --git a/libs/db/connection.cpp b/libs/db/connection.cpp
--- a/libs/db/connection.cpp
+++ b/libs/db/connection.cpp
@@ -1248,6 +1248,8 @@
     number = 0;
     QList<QuerySchema*> subqueries_for_lookup_data; // subqueries will be added to FROM section
     QString kexidb_subquery_prefix("__kexidb_subquery_");
+    QuerySchemaParameterValueListIterator paramValuesIt(driver, params);
+    QuerySchemaParameterValueListIterator *paramValuesItPtr = params.isEmpty() ? 0 : &paramValuesIt;
     foreach(Field *f, *querySchema.fields()) {
         if (querySchema.isColumnVisible(number)) {
             if (!sql.isEmpty())
@@ -1261,7 +1263,7 @@
                     sql += QLatin1Char('*');
             } else {
                 if (f->isExpression()) {
-                    sql += f->expression()->toString(driver);
+                    sql += f->expression()->toString(driver, paramValuesItPtr);
                 } else {
                     if (!f->table()) //sanity check
                         return QString();
@@ -1492,8 +1494,6 @@
     }
     //EXPLICITLY SPECIFIED WHERE EXPRESSION
     if (querySchema.whereExpression()) {
-        QuerySchemaParameterValueListIterator paramValuesIt(driver, params);
-        QuerySchemaParameterValueListIterator *paramValuesItPtr = params.isEmpty() ? 0 : &paramValuesIt;
         if (wasWhere) {
 //TODO: () are not always needed
             s_where = '(' + s_where + ") AND (" + querySchema.whereExpression()->toString(driver, paramValuesItPtr) + ')';
diff --git a/libs/db/parser/parser_p.cpp b/libs/db/parser/parser_p.cpp
--- a/libs/db/parser/parser_p.cpp
+++ b/libs/db/parser/parser_p.cpp
@@ -362,7 +362,8 @@
                 || c == KexiDBExpr_Logical
                 || c == KexiDBExpr_Relational
                 || c == KexiDBExpr_Function
-                || c == KexiDBExpr_Aggregation;
+                || c == KexiDBExpr_Aggregation
+                || c == KexiDBExpr_QueryParameter;
 
             if (c == KexiDBExpr_Variable) {
                 //just a variable, do nothing, addColumn() will handle this
diff --git a/libs/db/queryschema.cpp b/libs/db/queryschema.cpp
--- a/libs/db/queryschema.cpp
+++ b/libs/db/queryschema.cpp
@@ -1508,10 +1508,18 @@
 
 QuerySchemaParameterList QuerySchema::parameters()
 {
-    if (!whereExpression())
-        return QuerySchemaParameterList();
     QuerySchemaParameterList params;
-    whereExpression()->getQueryParameters(params);
+    const QueryColumnInfo::Vector fieldsExpanded(this->fieldsExpanded());
+    for (int i=0; i < fieldsExpanded.count(); ++i) {
+        const QueryColumnInfo *ci = fieldsExpanded[i];
+        if (ci->field->expression()) {
+            ci->field->expression()->getQueryParameters(params);
+        }
+    }
+    BaseExpr *where = whereExpression();
+    if (where) {
+        where->getQueryParameters(params);
+    }
     return params;
 }