fix: search should work as (term1 and term2)

backend/molgenis-emx2-graphql/src/main/java/org/molgenis/emx2/graphql/GraphqlTableFieldFactory.java

@@ -531,7 +531,14 @@ public static FilterBean[] convertMapToFilterArray(
           subFilters.add(and(nestedFilters.toArray(new Filter[nestedFilters.size()])));
         }
       } else if (entry.getKey().equals(FILTER_SEARCH)) {
-        subFilters.add(f(Operator.TRIGRAM_SEARCH, entry.getValue()));
+        if (entry.getValue() instanceof String && !entry.getValue().toString().trim().equals("")) {
+          subFilters.add(
+              f(
+                  Operator
+                      .TEXT_SEARCH, // might change to trigram search if we learn how to tune for
+                  // short terms
+                  Arrays.stream(entry.getValue().toString().split(" ")).toArray(String[]::new)));
+        }
       } else if (entry.getKey().equals(FILTER_EQUALS)) {
         //  complex filter, should be an list of maps per graphql contract
         if (entry.getValue() != null) {

backend/molgenis-emx2-sql/src/main/java/org/molgenis/emx2/sql/SqlQuery.java

@@ -424,7 +424,7 @@ private List<Condition> jsonFilterQueryConditions(
         } else if (Operator.AND.equals(f.getOperator())) {
           conditions.add(
               and(jsonFilterQueryConditions(table, column, tableAlias, subAlias, f, searchTerms)));
-        } else if (TRIGRAM_SEARCH.equals(f.getOperator())) {
+        } else if (TRIGRAM_SEARCH.equals(f.getOperator()) || TEXT_SEARCH.equals(f.getOperator())) {
           conditions.add(
               jsonSearchConditions(table, subAlias, TypeUtils.toStringArray(f.getValues())));
         } else {
@@ -519,8 +519,9 @@ private List<Condition> jsonFilterQueryConditions(
   private Condition jsonSearchConditions(
       SqlTableMetadata table, String subAlias, String[] searchTerms) {
     // create search
-    List<Condition> search = new ArrayList<>();
+    List<Condition> searchCondition = new ArrayList<>();
     for (String term : searchTerms) {
+      List<Condition> search = new ArrayList<>();
       search.add(
           field(name(alias(subAlias), searchColumnName(table.getTableName())))
               .likeIgnoreCase("%" + term + "%"));
@@ -570,8 +571,9 @@ private Condition jsonSearchConditions(
                 .likeIgnoreCase("%" + term + "%"));
         parent = parent.getInheritedTable();
       }
+      searchCondition.add(or(search));
     }
-    return or(search);
+    return and(searchCondition);
   }
 
   private Collection<Field<?>> jsonSubselectFields(
@@ -1382,7 +1384,7 @@ private Condition whereConditionSearch(
         searchConditions.add(and(subConditions));
       }
     }
-    return searchConditions.isEmpty() ? null : or(searchConditions);
+    return searchConditions.isEmpty() ? null : and(searchConditions);
   }
 
   private static SelectJoinStep<org.jooq.Record> limitOffsetOrderBy(

backend/molgenis-emx2-sql/src/test/java/org/molgenis/emx2/sql/TestFullTextSearch.java

@@ -106,6 +106,21 @@ public void nestedSearch() {
     // would exclude approved order
     assertTrue(!json.contains("approved"));
 
+    // test term1 AND term2
+    json = schema.query("Pet").where(f(Operator.TEXT_SEARCH, "red", "green")).retrieveJSON();
+    // would be spike and fire ant
+    assertTrue(json.contains("spike"));
+    assertTrue(json.contains("fire ant"));
+    assertTrue(!json.contains("tweety"));
+
+    json =
+        schema
+            .query("Order")
+            .where(f("pet", f(Operator.TEXT_SEARCH, "red", "green")))
+            .retrieveJSON();
+    // would be only spike
+    assertTrue(json.contains("spike"));
+
     // nesting example 2
     json =
         schema