-
Null pointer exception in UpdateSet
2020-12-08 20:24:57UpdateSet update = new UpdateSet.Builder(loc, set).build(); UpdateSet.Response response = client.execute(update); </code></pre> <p>I can retrieve the object via Erlang, and it is indeed a ... -
Insert null after update
2020-12-02 08:26:35When I do an update the Update Column is set but the Insert column get sets to null <p>`public abstract class Trackable { public virtual DateTime? Inserted { get; private set; } public virtual ... -
ibatis update set null
2011-08-26 13:01:00Today , when I want to set a field null using Ibatis .I found we must modify the generated mapping file .In the default mapping file :<if test="thefield != null">the_field = #{...Today , when I want to set a field null using Ibatis .
I found we must modify the generated mapping file .
In the default mapping file :<if test="thefield != null">the_field = #{thefield},</if> .
If wanna set the the_field to null , in your program , you must add
a script :
<if test="thefield == null">the_field = #{the_field},</if> .
So if you wanna update a field to null , the field was not null .
Be careful ! -
FileName in database become null when update object without update file
2020-11-28 21:51:44<div><p>I used vichUploaderBundle to upload a file, all works fine , but when i update the object without changing the input file , the fileName in the data base become null , why ?? this is some ... -
mysql设置on set null_MySQL:错误150使用ON UPDATE SET NULL和ON DELETE SET NULL,为什么?
2021-01-19 14:35:08我有这个:DROP TABLE IF EXISTS `sf_guard_...CREATE TABLE `sf_guard_user`(`id` INTEGER(11) NOT NULL AUTO_INCREMENT,`username` VARCHAR(128) NOT NULL,PRIMARY KEY (`id`),UNIQUE KEY `sf_guard_user_U_1` (`u...我有这个:
DROP TABLE IF EXISTS `sf_guard_user`;
CREATE TABLE `sf_guard_user`
(
`id` INTEGER(11) NOT NULL AUTO_INCREMENT,
`username` VARCHAR(128) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `sf_guard_user_U_1` (`username`)
)Type=InnoDB;
DROP TABLE IF EXISTS `shop_orders`;
CREATE TABLE `shop_orders`
(
`orders_id` INTEGER(11) NOT NULL AUTO_INCREMENT,
`sfgu_id` INTEGER(11) NOT NULL,
PRIMARY KEY (`orders_id`),
INDEX `shop_orders_FI_1` (`sfgu_id`),
CONSTRAINT `shop_orders_FK_1`
FOREIGN KEY (`sfgu_id`)
REFERENCES `sf_guard_user` (`id`)
ON UPDATE SET NULL
ON DELETE SET NULL,
)Type=InnoDB;
我收到这个错误:
1005 – Can’t create table
‘prueba1.shop_orders’ (errno: 150)
如果我不删除ON UPDATE SET NULL和ON DELETE SET NULL行.
知道为什么吗?
问候
哈维
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Bool sent as null on update despite "notnull
2021-01-11 00:16:49<p>Given the following code (untested—my apologies), the <code>test_boolean</code> value is sent as <code>NULL</code> in the update statement: <pre><code> type Example struct { ID int64 TestBoolean... -
Can't set form control to null using setValue update function
2020-12-01 17:01:49<p>however when attempting to set the value of a control to null using the setValue update function i.e. setValue(null) the following error occurs. <pre><code> TypeError: Cannot read property '... -
URL: default port set to null after scheme update
2021-01-08 07:45:04<div><p>For whatwg/url#328. 该提问来源于开源项目:web-platform-tests/wpt</p></div> -
Update don't set null value if conversion exist
2021-01-08 23:15:49I want to update entity with given dto and some values are null. Mapstruct not update this null values if there is type conversion. In given code if b is null in source, update method don't set ... -
Update column migration method to correctly set null: false
2020-11-20 23:08:35With this update, including the <code>null: false</code> flag will now set the column to be <code>null: false</code> as expected.</p><p>该提问来源于开源项目:rgeo/activerecord-postgis-adapter... -
"Role" property of conversation update activity set to null
2020-11-24 10:23:22<p>When the conversationUpdate activity is sent by WebChat, the Role property of the activity is set to null. As a result, the ProactiveState does not get updated with new Conversation details since ... -
Session.get() always return null after update to 0.3.4
2020-12-09 09:56:03I have a trouble after update to 0.3.4, <code>Session.get('key')</code> always returns <em>null</em> for both temporary and persistent keys used in app. All keys at local storage become equal... -
您想知道如何在Access 2003中使用ON UPDATE CASCADE/ON DELETE CASCADE,ON UPDATE SET NULL/ ON DELETE ...
2007-05-19 11:00:00您想知道如何在Access 2003中使用ON UPDATE CASCADE/ ON DELETE CASCADE,ON UPDATE SET NULL/ ON DELETE SET NULL。 根据我的测试,ON UPDATE CASCADE/ ON DELETE CASCADE 能够在a您想知道如何在Access 2003中使用ON UPDATE CASCADE/ ON DELETE CASCADE,ON UPDATE SET NULL/ ON DELETE SET NULL。
根据我的测试,ON UPDATE CASCADE/ ON DELETE CASCADE 能够在adp 数据库和ANSI92 mdb数据库中正常使用,然而,ON UPDATE SET NULL/ ON DELETE SET NULL在adp 数据库和ANSI92 的mdb数据库中都提示语法错误。
以下的信息供您参考:
第一步:把mdb数据库设为ANSI92数据库
=========================
1. 打开mdb数据库
2. 点击Tools -> Options -> Tables/Queries -> SQL Server Compatible Syntax (ANSI92) -> This database -> OK.
第二步:在adp 或ANSI92 mdb数据库中使用ON UPDATE CASCADE/ ON DELETE CASCADE:
方法一:在Query Designer 中创建存储过程
-----------------------------------------------
1. 打开adp 数据库。
2. 点击Objects 下的Queries
3. 创建一个新的存储过程StoredProcedure1, 切换到SQL View. 输入以下代码:
Create PROCEDURE StoredProcedure1
AS
CREATE TABLE Customers (CustId INTEGER PRIMARY KEY, CLstNm NCHAR VARYING(50))
RETURN
4. 创建新的存储过程StoredProcedure2, 切换到SQL View. 输入以下代码:
CREATE PROCEDURE StoredProcedure2
AS
CREATE TABLE Orders (OrderId INTEGER PRIMARY KEY, CustId INTEGER, OrderNotes NCHAR VARYING (255), CONSTRAINT FKOrdersCustId FOREIGN KEY (CustId) REFERENCES Customers ON UPDATE CASCADE ON DELETE CASCADE)
RETURN
注意: 如果是mdb 数据库,那应该创建两个新的Query.
Query1 为以下代码:
CREATE TABLE Customers (CustId INTEGER PRIMARY KEY, CLstNm NCHAR VARYING(50))
Query2 为以下代码:
CREATE TABLE Orders (OrderId INTEGER PRIMARY KEY, CustId INTEGER, OrderNotes NCHAR VARYING (255), CONSTRAINT FKOrdersCustId FOREIGN KEY (CustId) REFERENCES Customers ON UPDATE CASCADE ON DELETE CASCADE)
方法二:创建新的module 并输入以下代码:
------------------------------------------
Function test()
Dim sqlstr As String
Dim conn As ADODB.Connection
Set conn = CurrentProject.Connection
sqlstr1 = " CREATE TABLE Customers1 (CustId INTEGER PRIMARY KEY, CLstNm NCHAR VARYING(50))"
sqlstr2 = "CREATE TABLE Orders1 (OrderId INTEGER PRIMARY KEY, CustId INTEGER, OrderNotes NCHAR VARYING (255), CONSTRAINT FKOrdersCustId1 FOREIGN KEY (custid) REFERENCES customers1 ON UPDATE CASCADE ON DELETE CASCADE )"
conn.Execute sqlstr1
conn.Execute sqlstr2
Application.RefreshDatabaseWindow
conn.Close
End Function
我将会继续测试ON UPDATE SET NULL/ ON DELETE SET NULL. 如果有新的进展, 我会尽早让您知道.
[/CHAPTER] -
set default Config to null in write/update/upload/copy
2020-11-26 18:06:13<div><p>$options is not required in S3ClientTrait....<p>So should be Config. So that I don't have to construct an empty Config: new \League\Flysystem\Config([]). <p>Most of time, I only need to ... -
sql语句 update字段null不能用is null
2019-09-02 15:21:46update字段为 null 值时, 要用 set column = null, ...✖UPDATE tableA set 字段a is null WHERE字段b = 条件; 例 mysql> UPDATE t SET col3 is null WHERE col1 = 'a'; ERROR 1064 (42000): You have...update字段为 null 值时,
要用
set column = null,
而不是
set column is null
✖UPDATE tableA set 字段a is null WHERE字段b = 条件;
例mysql> UPDATE t SET col3 is null WHERE col1 = 'a'; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'is null WHERE col1 = 'a'' at line 1
〇UPDATE tableA set 字段a = null WHERE字段b = 条件;
例mysql> UPDATE t SET col3 = null WHERE col1 = 'a'; Query OK, 1 row affected (0.03 sec)
以上。
-
外键参数 onupdate,ondelete等(cascade,no adcion,set null,restrict)
2019-03-12 11:17:00先看On Delete属性,可能取值如上图为:No Action, Cascade,Set Null, Restrict属性。 当取值为No Action或者Restrict时,则当在父表(即外键的来源表)中删除对应记录时,首先检查该记录是否有对应外键,如果有则... -
BLOB update to NULL
2021-01-12 17:32:12<p>Now try to edit this row and set <code>bin</code> to NULL. <ul><li><strong>Original URL</strong>: "https://sourceforge.net/p/phpmyadmin/feature-requests/935/":... -
mybatis update set if
2021-03-04 09:37:23<update id="updateNotebookMaterial" parameterType="NotebookMaterial">...set> <if test="notebookMaterial.purpose != null and notebookMaterial.purpose != ''"> PURPOSE . -
sql外键约束NO ACTION,CASCADE,SET NULL,SET DEFAULT
2019-09-13 16:21:39NO ACTION 指定如果试图删除/修改某一行,而该行的键被其他表的现有行中的外键所...CASCADE、SET NULL 和 SET DEFAULT 允许通过删除或更新键值来影响指定具有外键关系的表,这些外键关系可追溯到在其中进行修改的... -
Ability to set CONCAT_NULL_YIELDS_NULL
2020-11-23 02:21:53<p>TinyTds::Error: UPDATE failed because the following SET options have incorrect settings: 'CONCAT_NULL_YIELDS_NULL'. Verify that SET options are correct for use with indexed views and/or ... -
detect and raise for version_id is NULL both before UPDATE and after UPDATE/INSERT
2021-01-08 04:00:56UPDATE process_instance SET exclusive_lock=%s WHERE process_instance.id = %s AND process_instance.exclusive_lock = %s'] [parameters: [{'exclusive_lock': datetime.datetime(2016,... -
Upserting a field of an existing Document with null does not update that field
2020-11-27 12:24:30<p>Thus, the update query excludes fields that are set to <code>null</code>. I would expect it to be possible to update an existing Document's field with <code>null</code> during an upsert ... -
ReverseGeocoder set to null
2021-01-07 06:14:39UPDATE devices SET latestPosition_id = :id WHERE id = :device_id; </entry> <!-- Web interface port --> <entry key="http.enable">true</entry> <entry key... -
级联删除与set null
2019-07-02 23:09:00FOREIGN KEY (charger_id) REFERENCES ...set null 父表update / delete记录时,将子表上匹配记录的列设为null alter table tab_name drop 外键名; Restrict方式,父表不能进行删除更新操作 转载于:https://... -
oracle中null 值对update的影响。
2016-10-27 12:56:02update t set t.a = t.a + t.b; 上面这个sql,如果a的 值为 1,b的值是 null,执行上的sql后,a的值会变为空。oracle的NULL值处处处有坑,需要随时注意啊。 -
mybatis update set 多个字段
2020-11-03 21:42:27mybatis update set 多个字段 <update id="updateCustomer" parameterType="com.entrym.domain.Customer"> UPDATE customer set <if test="name!=null">name=#{name,jdbcType=VARCHAR},</if> &... -
UPDATE SET FROM WHERE
2010-09-20 09:03:00在项目中见到这样的SQL语句. ...1 UPDATE WZ_INVENTORY_CURRENT2 SET INVENTORY_STATUS = 'N', 3 SO_ID = NULL,4 SO_DETAIL_ID = NULL,5 PICKING_ID = NULL,6 PICKING_DETAIL_ID = NULL,7 PICKING_NO = NULL8 F... -
elasticsearch doc manager sends null for fields mentioned in --field list during an update when $set...
2020-11-30 06:01:46<div><p>elasticsearch doc manager sends a null value to the fields that are not in $set of the respective update oplog entry but present in the --fields list of mongo-connector commandline.</p><p>该...