jsonb_build_array( [VARIADIC "any"] ) 描述:从一个可变参数列表构造一个可能包含异质类型的JSON数组。 返回类型:jsonb 示例: SELECT jsonb_build_array('a',1,'b',1.2,'c',true,'d',null,'e',json '{"x": 3, "y": [1,2,3]}',''); jsonb_build_array --- ["a", 1, "b", ...
在PostgreSQL 中,json_build_object 和array_agg 是两个非常有用的函数,它们可以用来构建 JSON 对象和处理数组。然而,distinct 关键字不能直接与 array_agg 函数一起使用,因为 array_agg 默认会聚合所有行中的值,而不考虑它们的唯一性。 如果你想要在使用 json_build_object 的同时确保聚合的数组中的元素是唯一的...
array_agg()和string_agg()函数支持并行聚合。...David Rowley 为string_agg()和array_agg()函数实现了并行聚合的新功能。...PostgreSQL 14 和 15 的输出EXPLAIN相同。 ...如您所见,即将实施并行聚合的 PostgreSQL 16 的最终成本为118.02!之前版本的最终执行成本为185.70。...成本是以任意单位表示的查询执行时...
public JsonArrayValueResolver() Method Detail resolve public Object resolve(Object context) Specified by: resolve in interface com.github.jknack.handlebars.ValueResolver resolve public Object resolve(Object context, String name) Specified by: resolve in interface ...
JsonArray add(int pos, Object value) Add an Object to the JSON array at given position pos. JsonArray add(Object value) Add an Object to the JSON array. JsonArray addAll(JsonArray array) Appends all of the elements in the specified array to the end of this JSON array. JsonA...
Unexpected character ('<' (code 60)): expected a valid value (JSON String, Number, Array, Object SonarQube Server / Community Build gitlab Srivijaya_Bhat (Srivijaya Bhat) August 24, 2022, 8:28am 1 Sonarqube version - Developer edition 9.3 ...
My full package.json (this project managed by nx and code shared with web project, so some packages may not be actual for you): { "name": "some name", "version": "1.2.2", "license": "MIT", "scripts": { "start": "nx serve", "build": "nx build", "eas-build-pre-install"...
public JsonArray deserialize(String topic, byte[] data) Specified by: deserialize in interface org.apache.kafka.common.serialization.Deserializer<JsonArray> close public void close() Specified by: close in interface Closeable Specified by: close in interface AutoClose...
public JsonArrayMessageCodec() Method Detail encodeToWire public void encodeToWire(Buffer buffer, JsonArray jsonArray) Description copied from interface: MessageCodec Called by Vert.x when marshalling a message to the wire. Specified by: encodeToWire in interface...
io.vertx.core.json Class JsonArrayjava.lang.Object io.vertx.core.json.JsonArray All Implemented Interfaces: ClusterSerializable, Shareable, Iterable<Object> public class JsonArray extends Object implements Iterable<Object>, ClusterSerializable, Shareable A representation of a JSON array in Java. ...