Note:Thejson_typeoffunction'snullreturn value should not be confused with a SQL NULL. While callingjson_typeof('null'::json)will returnnull, callingjson_typeof(NULL::json)will return a SQL NULL. Note:If the argument tojson_strip_nullscontains duplicate field names in any object, the result...
QUERY: select * from json_populate_recordset(null::message_row,msgjson) CONTEXT: PL/pgSQL function get_jsonrows(refcursor) line 12 at OPEN *** Error *** ERROR: type "message_row" does not exist SQL state: 42704 Context: PL/pgSQL function get_jsonrows(refcursor) line 12 at OPEN ===...
-- 创建函数1 smallint到boolean到转换函数CREATE OR REPLACE FUNCTION "smallint_to_boolean"("i" int2)RETURNS "pg_catalog"."bool" AS $BODY$BEGINRETURN (i::int2)::integer::bool;END;$BODY$LANGUAGE plpgsql VOLATILE-- 创建赋值转换1create cast (SMALLINT as BOOLEAN) with function smallint_to_b...
这个例子是后台获取某个目录的所有文件信息,前台网页显示。...代码文件: http://files.cnblogs.com/kenkofox/jsonTest.html%E5%92%8COnlineFileManagerServlet.rar JSON包(...',function(data){ ...
_json_object_key_value", ERRCODE_DUPLICATE_JSON_OBJECT_KEY_VALUE }, { "invalid_argument_for_sql_json_datetime_function", ERRCODE_INVALID_ARGUMENT_FOR_SQL_JSON_DATETIME_FUNCTION }, { "invalid_json_text", ERRCODE_INVALID_JSON_TEXT }, { "invalid_sql_json_subscript", ERRCODE_INVALID_SQL_JSON...
PostgreSQL全文检索支持JSON和JSONB(PosgreSQL 10新特性)。 一、JSON和JSONB数据类型 PostgreSQL支持非关系数据类型json (JavaScript Object Notation),本节介绍json类型、json与jsonb差异、json与jsonb操作符和函数以及jsonb键值的追加、删除、更新。 1、JSON类型简介 ...
CREATE OR REPLACE FUNCTION "smallint_to_boolean"("i" int2) RETURNS "pg_catalog"."bool" ASBODY BEGIN RETURN (i::int2)::integer::bool; END; BODY LANGUAGE plpgsql VOLATILE -- 创建赋值转换1 create cast (SMALLINT as BOOLEAN) with function smallint_to_boolean as ASSIGNMENT; ...
示例：自定义函数CREATE FUNCTION add_tax(price NUMERIC) RETURNS NUMERIC AS $$ BEGIN RETURN pri...
bill@bill=>create or replace function lower(text[]) returns text[] as $$ bill$# select array_agg(lower(x)) from unnest($1) t(x); bill$# $$ language sql strict immutable; CREATE FUNCTION bill@bill=>select lower(array['A','a']); ...
A trigger function must return either NULL or a record/row value having exactly the structure of the table the trigger was fired for. 以plpgsql为例,触发器函数范例。 使用hstore 和触发器跟踪敏感数据的DML。 创建需要被跟踪的测试表 CREATE TABLE test (id int primary key, info text, crt_time ...