在你的DAO(数据访问对象)接口中,使用Spring Data JPA提供的@Query注解编写自定义查询语句。在查询语句中,使用Postgres的JSONB函数来解析JSONB列,并将其映射到DTO类。例如: 代码语言:txt 复制 @Query(value = "SELECT jsonb_array_elements(data) AS item FROM your_table",
在Postgres中,JSONB是一种数据类型,用于存储和查询JSON格式的数据。它提供了一种灵活的方式来存储和操作半结构化数据。 全局替换是指在JSONB字段中替换所有匹配的值。为了实现全局替换,...
from django.db import connection def test_raw_sql(): dear_api = setup_dear(dear_entity=os.getenv("DEAR_ENTITY")) dear_cached_api = DearCachedAPI(dear_api=dear_api) sql = """ select jdata, jsonb_array_elements(cached_dear_dearcache.jdata#>'{Fulfilments}')->'Pick' as picks from ...
10.JSONB 从Postgres 9.2开始,Postgres的每个版本中都有JSON的身影,在每个新版本功能都有所提升,并且正在逐步完善成一个更加完美的库。在最新发布的9.5版本中,JSONB在psql中的输出也更具可读性。
QuestionIDs postgres.Jsonb `json:"question_ids"` } varhomeworkRes []homeWorkQuestionIds db.Model(&lesson.LessonHomeWork{}). Select("question_ids"). Joins("LEFT JOIN xxxx on lesson_home_works.home_work_id = home_works.id"). Where("ccc.lesson_id = ?", lessonIDQuery). ...
CREATETABLEjs( idserial, data jsonb,CHECK(data @@'name IS STRING ANDsimilar_ids.#: IS NUMERIC ANDpoints.#:(x IS NUMERIC AND y IS NUMERIC)'::jsquery)); In this example the check constraint validates that in the "data" jsonb column the value of the "name" key is a string, the ...
jsonb_array_elements_text( COALESCE( NULLIF(array_field, '[]'), '[null]')) 1. 2. 3. 4. 5. 6. 7. 8. 9. GENERATED 字段, GENERATED…STORED 对于读多写少的表, 这是一个高效的性能提升方法, 对已知表可以增加Generated字段, 这些字段只读, 自动计算赋值, 可以像普通字段一样参与查询, 不需...
Featuring regep_split_to_array and recursive functions. These functions even have terminal animations! Advent of Code - Day 17 SQL Solutions for Day 17 of Advent of Code. This one uses jsonb and arrays to keep track of points. Advent of Code - Day 16 SQL Solutions for Day 16 of ...
private JsonbContent jsonbContent; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public JsonbContent getJsonbContent() { return jsonbContent; } public void setJsonbContent(JsonbContent jsonbContent) { ...
Since 9.4 postgres has the with ordinality construct: https://stackoverflow.com/questions/8760419/postgresql-unnest-with-element-number/8767450#8767450 We want to build a query like: SELECT "item", "index" FROM "t", jsonb_array_elements(...