when adding a new record like this
ContentContacts c2 = new ContentContacts();
c2.updated_user = c2.created_user = loggedUserId;
c2.created_date = c2.updated_date = DateTime.UtcNow;
db.ContentContacts.AddObject(c2);
I'm getting
Cannot insert the value NULL into column 'main_email_support', table 'SQL2008R2.dbo.ContentContacts'; column does not allow nulls. INSERT fails. The statement has been terminated.
but the default value in the database is an empty string like:
why am I getting such error? shouldn't the EF says something like:
"ohh, it's a nullvalue, so let's add the column default value instead"
I did a small test, created a table with a column that had a default value but did not allow nulls.
Then this SQL Statement:
INSERT INTO [Test].[dbo].[Table_1]
([TestText])
VALUES
(null)
Gives this error:
Msg 515, Level 16, State 2, Line 1
Cannot insert the value NULL into column 'TestText', table
'Test.dbo.Table_1'; column does not allow nulls. INSERT fails.
The problem here is that the insert specifies all the columns, also those with default values. The the Insert tries to update the columns with null values.
You have 2 options:
Update the table through a view, which does not contain the default columns
Set the default values in your C# code
A default value is business logic, so there is a case for it being set in the business layer of your application.
Related
I'm populating a database from a .csv file and somewhere in my code I'm referring to a foreign key that might be invalid ( so when I'm going to select that id it returns null). At this point I want to log the row that returns null value and ignore insertion of that row but transaction don't stop and continue. How do I achieve this?
for index, row in df.iterrows():
insert_query = f"""insert into {table_name}
(travel_date, train_id, delay)
values ({row[0]},
(select id from {train_table} where {train_table}.train_no={row[1]} limit 1),
{row[2]});"""
cursor.execute(insert_query)
I am trying to insert record into a table using a variable but it is failing.
command:
val query = "INSERT into TABLE Feed_metadata_s2 values ('LOGS','RUN_DATE',{} )".format(s"$RUN_DATE")
spark.sql(s"query")
spark.sql("INSERT into TABLE Feed_metadata_s2 values ('LOGS','ExtractStartTimestamp',$ExtractStartTimestamp)")
error:
INSERT into TABLE Feed_metadata_s2 values ('SDEDLOGS','ExtractStartTimestamp',$ExtractStartTimestamp)
------------------------------------------------------------------------------^^^
at org.apache.spark.sql.catalyst.parser.ParseException.withCommand(ParseDriver.scala:241)
at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parse(ParseDriver.scala:117)
at org.apache.spark.sql.execution.SparkSqlParser.parse(SparkSqlParser.scala:48)
at org.apache.spark.sql.catalyst.parser.AbstractSqlParser.parsePlan(ParseDriver.scala:69)
at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:642)
It seems you're confused with string interpolation... you need to put s before the last query so that the variable is substituted into the string. Also the first two lines can be simplified:
val query = s"INSERT into TABLE Feed_metadata_s2 values ('LOGS','RUN_DATE',$RUN_DATE)"
spark.sql(query)
spark.sql(s"INSERT into TABLE Feed_metadata_s2 values ('LOGS','ExtractStartTimestamp',$ExtractStartTimestamp)")
I am trying to single insert data into table with assigned PK. Manually assiging PK.
XML file
<insert id = "insertStd" parameterType = "com.org.springboot.dao.StudentEntity" useGeneratedKeys = "false" keyProperty = "insertStd.id", keyColumn = "id">
INSERT INTO STUDENT (ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL )
VALUES (ID=#{insertStd.id}, NAME=#{insertStd.name}, BRANCH=#{insertStd.branch}, PERCENTAGE=#{insertStd.percentage}, PHONE=#{insertStd.phone}, EMAIL =#{insertStd.email});
</insert>
Service call method
public boolean saveStudent(Student student){
LOGGER.info("Student object save");
int savedId= studentMapper.insertStd(student);
}
Log file
org.springframework.jdbc.badsqlgrammarexception
### Error updating database Causes: cause org.postgresql.util.psqlexception error column id does not exist
HINT: There is a column named "id" in the table "student" but it can't be referenced from this part of the query.
Position 200
### Error may exist in file [c:\.....\StudentMapper.xml]
### Error may involve in com.org.springboot.dao.StudentMapper.insertStd-InLine
### The error occurred while setting parameters
### SQL INSERT INTO STUDENT (ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL )
VALUES (ID=?, NAME=?,BRANCH=?, PERCENTAGE=?, PHONE=?, EMAIL=?);
### cause org.postgresql.util.psqlexception ERROR column "id" doesn't exist. //It did worked with JPA id assigned manually.
### There is a column named "ID" in the table "STUDENT", Bbut it cannot be referenced from the part of the query.
The INSERT statement of malformed. The VALUES clause should not include the column names.
Also, since there's no primary auto-generation, you can remove all the other attributes. Just leave the mapper id.
Note: if you want to manually assign the PK value, you need to make sure the table does not have a GENERATED ALWAYS clause for the column. If this is the case, the table will ignore the value you are providing and will use its own rules to generate the PK.
Use:
<insert id="insertStd">
INSERT INTO STUDENT (ID, NAME, BRANCH, PERCENTAGE, PHONE, EMAIL)
VALUES (
#{insertStd.id}, #{insertStd.name}, #{insertStd.branch},
#{insertStd.percentage}, #{insertStd.phone}, #{insertStd.email}
);
</insert>
Your error is easily reproduceable:
create table t (a int, b varchar(10));
insert into t (a, b) values (123, 'ABC'); -- succeeds
insert into t (a, b) values (a=123, b='ABC'); -- fails!
error: column "a" does not exist
See the Fiddle.
I have a table called device, the table has a column called devicMeta. The deviceMeta looks like
{"id":"1234567890", "firmware":"1.001","hardware":"1.0"}
I want to insert a new parameter into column 'deviceMeta', for example "company":'ABC', the expected result is
{"id":"1234567890","firmware":"1.001","hardware":"1.0","company":'ABC'}
How can I do this using PostgreSql's UPDATE command
UPDATE "device"
?
WHERE "id" = '1234567890'
Assuming that column is defined as jsonb (which it should be) you can simply concatenate the new key/value pair:
update device
set devicemeta = devicemeta || '{"company": "ABC"}'
where id = 123456789;
How to set an object to null.
Ex:
my object samp contains three fileds
samp.field1,samp.field2.sampfield3
If i set samp:= null;
im getting errors is there a way to set the object value to null.
An sql database does not know about objects, it deals with rows in table.
To remove a row use DELETE :
e.g. :
DELETE FROM samp WHERE id = 12345;
DELETE FROM samp WHERE field1 = 'Delete Me';
The first example is typical to remove individual rows uing their primary key (id in this case)
The second example will remove a group of rows which have a speciic value for a field.