java-spanner/samples/snippets/src/main/java/com/example/spanner/QueryWithJsonParameterSample.java at main · googleapis/java-spanner · GitHub

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/*
 * Copyright 2021 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

packagecom.example.spanner;

// [START spanner_query_with_json_parameter]
importcom.google.cloud.spanner.DatabaseClient;
importcom.google.cloud.spanner.DatabaseId;
importcom.google.cloud.spanner.ResultSet;
importcom.google.cloud.spanner.Spanner;
importcom.google.cloud.spanner.SpannerOptions;
importcom.google.cloud.spanner.Statement;
importcom.google.cloud.spanner.Value;

classQueryWithJsonParameterSample {

staticvoidqueryWithJsonParameter() {
// TODO(developer): Replace these variables before running the sample.
StringprojectId = "my-project";
StringinstanceId = "my-instance";
StringdatabaseId = "my-database";

try (Spannerspanner =
SpannerOptions.newBuilder().setProjectId(projectId).build().getService()) {
DatabaseClientclient =
spanner.getDatabaseClient(DatabaseId.of(projectId, instanceId, databaseId));
queryWithJsonParameter(client);
 }
 }

staticvoidqueryWithJsonParameter(DatabaseClientclient) {
StringexampleJson = "{\"rating\": 9}";
Statementstatement =
Statement.newBuilder(
"SELECT VenueId, VenueDetails\n"
 + "FROM Venues\n"
 + "WHERE JSON_VALUE(VenueDetails, '$.rating') = "
 + "JSON_VALUE(@details, '$.rating')")
 .bind("details")
 .to(Value.json(exampleJson))
 .build();
try (ResultSetresultSet = client.singleUse().executeQuery(statement)) {
while (resultSet.next()) {
System.out.printf(
"VenueId: %s, VenueDetails: %s%n",
resultSet.getLong("VenueId"), resultSet.getJson("VenueDetails"));
 }
 }
 }
}
// [END spanner_query_with_json_parameter]