單層級巢狀型別查詢樣本
以下樣本用於查詢col_nested.nested_1為tablestore的資料。其中col_nested為巢狀型別欄位,子行中包含nested_1和nested_2兩列。
private static void nestedQuery(SyncClient client) {
SearchQuery searchQuery = new SearchQuery();
NestedQuery nestedQuery = new NestedQuery(); //設定查詢類型為NestedQuery。
nestedQuery.setPath("col_nested"); //設定巢狀型別列的路徑。
TermQuery termQuery = new TermQuery(); //構造NestedQuery的子查詢。
termQuery.setFieldName("col_nested.nested_1"); //設定列名,注意帶有巢狀型別列的路徑。
termQuery.setTerm(ColumnValue.fromString("tablestore")); //設定要查詢的值。
nestedQuery.setQuery(termQuery);
nestedQuery.setScoreMode(ScoreMode.None);
searchQuery.setQuery(nestedQuery);
//searchQuery.setGetTotalCount(true);//設定返回匹配的總行數。
SearchRequest searchRequest = new SearchRequest("<TABLE_NAME>", "<SEARCH_INDEX_NAME>", searchQuery);
//通過設定columnsToGet參數可以指定返回的列或返回所有列,如果不設定此參數,則預設只返回主鍵列。
//SearchRequest.ColumnsToGet columnsToGet = new SearchRequest.ColumnsToGet();
//columnsToGet.setReturnAll(true); //設定為返回所有列。
//columnsToGet.setColumns(Arrays.asList("ColName1","ColName2")); //設定為返回指定列。
//searchRequest.setColumnsToGet(columnsToGet);
SearchResponse resp = client.search(searchRequest);
//System.out.println("TotalCount: " + resp.getTotalCount()); //列印匹配到的總行數,非返回行數。
System.out.println("Row: " + resp.getRows());
}
多層級巢狀型別查詢樣本
以下樣本用於查詢col_nested.nested_2.nested_2_2為tablestore的資料。其中col_nested為巢狀型別欄位,col_nested的子行中包含nested_1和nested_2兩列,nested_2的子行中又包含nested_2_1和nested_2_2兩列。
private static void nestedQuery(SyncClient client) {
SearchQuery searchQuery = new SearchQuery();
NestedQuery nestedQuery = new NestedQuery(); //設定查詢類型為NestedQuery。
nestedQuery.setPath("col_nested.nested_2"); //設定巢狀型別列的路徑,即要查詢欄位的父路徑。
TermQuery termQuery = new TermQuery(); //構造NestedQuery的子查詢。
termQuery.setFieldName("col_nested.nested_2.nested_2_2"); //設定列名,即要查詢欄位的完整路徑。
termQuery.setTerm(ColumnValue.fromString("tablestore")); //設定要查詢的值。
nestedQuery.setQuery(termQuery);
nestedQuery.setScoreMode(ScoreMode.None);
searchQuery.setQuery(nestedQuery);
//searchQuery.setGetTotalCount(true);//設定返回匹配的總行數。
SearchRequest searchRequest = new SearchRequest("<TABLE_NAME>", "<SEARCH_INDEX_NAME>", searchQuery);
//通過設定columnsToGet參數可以指定返回的列或返回所有列,如果不設定此參數,則預設只返回主鍵列。
//SearchRequest.ColumnsToGet columnsToGet = new SearchRequest.ColumnsToGet();
//columnsToGet.setReturnAll(true); //設定為返回所有列。
//columnsToGet.setColumns(Arrays.asList("ColName1","ColName2")); //設定為返回指定列。
//searchRequest.setColumnsToGet(columnsToGet);
SearchResponse resp = client.search(searchRequest);
//System.out.println("TotalCount: " + resp.getTotalCount()); //列印匹配到的總行數,非返回行數。
System.out.println("Row: " + resp.getRows());
}
巢狀型別查詢使用查詢高亮樣本
以下樣本用於使用NestedQuery功能查詢表中Col_Nested巢狀型別欄位中Level1_Col1_Nested子列的值能夠匹配hangzhou shanghai
的資料,並在返回結果中對關鍵詞進行高亮顯示。
/**
* NestedQuery查詢高亮,通過innerHits設定參數。
*/
public static void NestedQueryQueryWithHighlighting1(SyncClient client) {
SearchRequest searchRequest = SearchRequest.newBuilder()
.tableName("<TABLE_NAME>")
.indexName("<SEARCH_INDEX_NAME>")
.returnAllColumnsFromIndex(true)
.searchQuery(SearchQuery.newBuilder()
.limit(5)
.query(QueryBuilders.nested()
.path("Col_Nested")
.scoreMode(ScoreMode.Min)
.query(QueryBuilders.match("Col_Nested.Level1_Colqia1_Nested", "hangzhou shanghai"))
.innerHits(InnerHits.newBuilder()
.highlight(Highlight.newBuilder()
.addFieldHighlightParam("Col_Nested.Level1_Col1_Nested", HighlightParameter.newBuilder().build())
.build())
.build()))
.build())
.build();
SearchResponse resp = client.search(searchRequest);
// 列印高亮結果。
printSearchHit(resp.getSearchHits(), "");
}
/**
* 列印searchHit內容。
* @param searchHits searchHits
* @param prefix Nested結構輸出時,增加首碼以列印層次資訊。
*/
private static void printSearchHit(List<SearchHit> searchHits, String prefix) {
for (SearchHit searchHit : searchHits) {
if (searchHit.getScore() != null) {
System.out.printf("%s Score: %s\n", prefix, searchHit.getScore());
}
if (searchHit.getOffset() != null) {
System.out.printf("%s Offset: %s\n", prefix, searchHit.getOffset());
}
if (searchHit.getRow() != null) {
System.out.printf("%s Row: %s\n", prefix, searchHit.getRow().toString());
}
// 列印各欄位高亮分區結果。
if (searchHit.getHighlightResultItem() != null) {
System.out.printf("%s Highlight: \n", prefix);
StringBuilder strBuilder = new StringBuilder();
for (Map.Entry<String, HighlightField> entry : searchHit.getHighlightResultItem().getHighlightFields().entrySet()) {
strBuilder.append(entry.getKey()).append(":").append("[");
strBuilder.append(StringUtils.join(",", entry.getValue().getFragments())).append("]\n");
}
System.out.printf("%s %s", prefix, strBuilder);
}
// 巢狀型別高亮結果。
for (SearchInnerHit searchInnerHit : searchHit.getSearchInnerHits().values()) {
System.out.printf("%s Path: %s\n", prefix, searchInnerHit.getPath());
System.out.printf("%s InnerHit: \n", prefix);
printSearchHit(searchInnerHit.getSubSearchHits(), prefix + " ");
}
System.out.println();
}
}
假設多層級巢狀型別欄位Col_Nested中包括Level1_Col1_Text(Text類型)和Level1_Col2_Nested(Nested類型)兩列,其中Level1_Col2_Nested巢狀型別欄位包括Level2_Col1_Text子列。
以下樣本用於通過在NestedQuery中添加BoolQuery對Col_Nested欄位中的Level1_Col1_Text子列和Level1_Col2_Nested下的Level2_Col1_Text子列同時使用查詢高亮功能。
public static void NestedQueryWithHighlighting(SyncClient client) {
SearchRequest searchRequest = SearchRequest.newBuilder()
.tableName("<TABLE_NAME>")
.indexName("<SEARCH_INDEX_NAME>")
.returnAllColumnsFromIndex(true)
.searchQuery(SearchQuery.newBuilder()
.limit(5)
.query(QueryBuilders.nested()
.path("Col_Nested")
.scoreMode(ScoreMode.Min)
.query(QueryBuilders.bool()
.should(QueryBuilders.match("Col_Nested.Level1_Col1_Text", "hangzhou shanghai"))
.should(QueryBuilders.nested()
.path("Col_Nested.Level1_Col2_Nested")
.scoreMode(ScoreMode.Min)
.query(QueryBuilders.match("Col_Nested.Level1_Col2_Nested.Level2_Col1_Text", "hangzhou shanghai"))
.innerHits(InnerHits.newBuilder()
.highlight(Highlight.newBuilder()
.addFieldHighlightParam("Col_Nested.Level1_Col2_Nested.Level2_Col1_Text", HighlightParameter.newBuilder().build())
.build())
.build())))
.innerHits(InnerHits.newBuilder()
.sort(new Sort(Arrays.asList(
new ScoreSort(),
new DocSort()
)))
.highlight(Highlight.newBuilder()
.addFieldHighlightParam("Col_Nested.Level1_Col1_Text", HighlightParameter.newBuilder().build())
.build())
.build())))
.build();
SearchResponse resp = client.search(searchRequest);
// 列印高亮結果。
printSearchHit(resp.getSearchHits(), "");
}
/**
* 列印searchHit內容。
* @param searchHits searchHits
* @param prefix Nested結構輸出時,增加首碼以列印層次資訊。
*/
private static void printSearchHit(List<SearchHit> searchHits, String prefix) {
for (SearchHit searchHit : searchHits) {
if (searchHit.getScore() != null) {
System.out.printf("%s Score: %s\n", prefix, searchHit.getScore());
}
if (searchHit.getOffset() != null) {
System.out.printf("%s Offset: %s\n", prefix, searchHit.getOffset());
}
if (searchHit.getRow() != null) {
System.out.printf("%s Row: %s\n", prefix, searchHit.getRow().toString());
}
// 列印各欄位高亮分區結果。
if (searchHit.getHighlightResultItem() != null) {
System.out.printf("%s Highlight: \n", prefix);
StringBuilder strBuilder = new StringBuilder();
for (Map.Entry<String, HighlightField> entry : searchHit.getHighlightResultItem().getHighlightFields().entrySet()) {
strBuilder.append(entry.getKey()).append(":").append("[");
strBuilder.append(StringUtils.join(",", entry.getValue().getFragments())).append("]\n");
}
System.out.printf("%s %s", prefix, strBuilder);
}
// 巢狀型別高亮結果。
for (SearchInnerHit searchInnerHit : searchHit.getSearchInnerHits().values()) {
System.out.printf("%s Path: %s\n", prefix, searchInnerHit.getPath());
System.out.printf("%s InnerHit: \n", prefix);
printSearchHit(searchInnerHit.getSubSearchHits(), prefix + " ");
}
System.out.println();
}
}