fix date patterns

Author: Hendrik Muhs

x-pack/plugin/data-frame/qa/single-node-tests/src/test/java/org/elasticsearch/xpack/dataframe/integration/DataFramePivotRestIT.java

@@ -216,7 +216,7 @@ public void testDateHistogramPivot() throws Exception {
             + "   \"group_by\": {"
             + "     \"by_hr\": {"
             + "       \"date_histogram\": {"
-            + "         \"fixed_interval\": \"1h\",\"field\":\"timestamp\",\"format\":\"yyyy-MM-DD_HH\""
+            + "         \"fixed_interval\": \"1h\",\"field\":\"timestamp\",\"format\":\"yyyy-MM-dd_HH\""
             + " } } },"
             + "   \"aggregations\": {"
             + "     \"avg_rating\": {"
@@ -250,7 +250,7 @@ public void testPreviewTransform() throws Exception {
         config += " \"pivot\": {"
             + "   \"group_by\": {"
             + "     \"reviewer\": {\"terms\": { \"field\": \"user_id\" }},"
-            + "     \"by_day\": {\"date_histogram\": {\"fixed_interval\": \"1d\",\"field\":\"timestamp\",\"format\":\"yyyy-MM-DD\"}}},"
+            + "     \"by_day\": {\"date_histogram\": {\"fixed_interval\": \"1d\",\"field\":\"timestamp\",\"format\":\"yyyy-MM-dd\"}}},"
             + "   \"aggregations\": {"
             + "     \"avg_rating\": {"
             + "       \"avg\": {"
@@ -285,7 +285,7 @@ public void testPivotWithMaxOnDateField() throws Exception {
         config +="    \"pivot\": { \n" +
             "        \"group_by\": {\n" +
             "            \"by_day\": {\"date_histogram\": {\n" +
-            "                \"fixed_interval\": \"1d\",\"field\":\"timestamp\",\"format\":\"yyyy-MM-DD\"\n" +
+            "                \"fixed_interval\": \"1d\",\"field\":\"timestamp\",\"format\":\"yyyy-MM-dd\"\n" +
             "            }}\n" +
             "        },\n" +
             "    \n" +

x-pack/plugin/src/test/resources/rest-api-spec/test/data_frame/preview_transforms.yml

@@ -75,7 +75,7 @@ setup:
             "pivot": {
               "group_by": {
                 "airline": {"terms": {"field": "airline"}},
-                "by-hour": {"date_histogram": {"fixed_interval": "1h", "field": "time", "format": "yyyy-MM-DD HH"}}},
+                "by-hour": {"date_histogram": {"fixed_interval": "1h", "field": "time", "format": "yyyy-MM-dd HH"}}},
               "aggs": {
                 "avg_response": {"avg": {"field": "responsetime"}},
                 "time.max": {"max": {"field": "time"}},
@@ -84,17 +84,17 @@ setup:
             }
           }
   - match: { preview.0.airline: foo }
-  - match: { preview.0.by-hour: "2017-02-49 00" }
+  - match: { preview.0.by-hour: "2017-02-18 00" }
   - match: { preview.0.avg_response: 1.0 }
   - match: { preview.0.time.max: "2017-02-18T00:30:00.000Z" }
   - match: { preview.0.time.min: "2017-02-18T00:00:00.000Z" }
   - match: { preview.1.airline: bar }
-  - match: { preview.1.by-hour: "2017-02-49 01" }
+  - match: { preview.1.by-hour: "2017-02-18 01" }
   - match: { preview.1.avg_response: 42.0 }
   - match: { preview.1.time.max: "2017-02-18T01:00:00.000Z" }
   - match: { preview.1.time.min: "2017-02-18T01:00:00.000Z" }
   - match: { preview.2.airline: foo }
-  - match: { preview.2.by-hour: "2017-02-49 01" }
+  - match: { preview.2.by-hour: "2017-02-18 01" }
   - match: { preview.2.avg_response: 42.0 }
   - match: { preview.2.time.max: "2017-02-18T01:01:00.000Z" }
   - match: { preview.2.time.min: "2017-02-18T01:01:00.000Z" }
@@ -123,7 +123,7 @@ setup:
             "pivot": {
               "group_by": {
                 "airline": {"terms": {"field": "airline"}},
-                "by-hour": {"date_histogram": {"fixed_interval": "1h", "field": "time", "format": "yyyy-MM-DD HH"}}},
+                "by-hour": {"date_histogram": {"fixed_interval": "1h", "field": "time", "format": "yyyy-MM-dd HH"}}},
               "aggs": {"avg_response": {"avg": {"field": "responsetime"}}}
             }
           }