Update
public BackendReturnObject Update(string tableName, Where where, Param param);
Parameters
Value | Type | Description |
---|---|---|
tableName | string | Name of table to be updated |
where | Where | param used to find rows to be updated |
param | Param | Information to be updated |
Description
From the values stored in the table, searches and modifies one row that corresponds to the 'where' conditional statement.
- The data can be modified regardless of schema definition status.
- Only one row can be modified.
- If multiple rows are retrieved by the where query, the last inserted row is modified.
- Regardless of the public/private status, you can only modify your own data.
- For numerical data, you can safely input numbers up to 9,007,199,254,740,991 (approximately 9 quadrillion).
When your input data exceeds the limit above, place values in units and tens are rounded down to 0.
As the number increases and place values expand, small numbers are rounded down, and large numbers are maintained up to 16 - 18 digits, based on the left.For 'long', the data is saved as shown below:
12345678912345678 -> 12345678912345678(within the limit of 9 quadrillion, the input number is maintained)
123456789123456789 -> 123456789123456780(exceeds the limit of 9 quadrillion, the last digit is rounded down)
1234567891234567891 -> 1234567891234568000
9223372036854775807 -> 9223372036854776000(the maximum value for 'long')
When saving an integer with double to save a larger piece of data, the number is displayed as shown below:
12345678912345678912 -> 12345678912345678000('double' is larger than the maximum value of 'long')
123456789123456789123.0 -> 123456789123456800000
1234567891234567891234.0 -> 123456789123456800000000
1.23456789123457E+29 -> 123456789123457000000000000000
In the case of receiving the number from the client (C#), it may be changed to an exponent format.
12345678912345678000 -> 1.23456789123457E+19
When only some of the columns in the row exist in param, only those columns are modified.
- Columns not in the param will not be deleted.
When there are columns that do not exist in a row of the param, they will undergo the following process:
- For a table whose schema is not defined, if a column that does not exist in the row is updated, a new column is added.
- For a table whose schema is defined, if a column whose schema is not declared is updated, an error occurs.
When an attempt is made to modify without conditions
When the condition is not specified, such as in the case of new Where(), the modification is proceeded for the row most recently added from the rows owned by the user.
Reserved column
When saving, eight fields, including partition, gamer_id, inDate, updatedAt, sender, receiver, reservationDate, owner_inDate, client_date, are used by the server.
When these columns are included in the param, an error occurs.
Value | Description | Whether the value is displayed in BACKND Console |
---|---|---|
partition | Value used by the server to classify a table | X |
gamer_id | Gamer ID of the row owner | O |
inDate | inDate of the row (key value) | O |
updatedAt | Time the table was last modified | O |
sender | Value used internally for BACKND function (e.g., mail) | X |
receiver | Value used internally for BACKND function (e.g., mail) | X |
reservationDate | Value used internally for BACKND function (e.g., mail) | X |
owner_inDate | User inDate of the row owner | O |
client_date | The time when the client first requested data creation | O |
In the case of old version tables' rows without the owner_inDate, an owner_inDate column is added when the rows are updated by using the corresponding method.
Example
Synchronous
// Modify the value of atk column to 110
Param param = new Param();
param.Add("atk", 110);
// Search data whose key column value is keyCode
Where where = new Where();
where.Equal("key", "keyCode");
Backend.GameData.Update("tableName", where, param);
Asynchronous
// Modify the value of atk column to 110
Param param = new Param();
param.Add("atk", 110);
// Search data whose key column value is keyCode
Where where = new Where();
where.Equal("key", "keyCode");
Backend.GameData.Update("tableName", where, param, (callback) =>
{
// Post-process
});
SendQueue
// Modify the value of atk column to 110
Param param = new Param();
param.Add("atk", 110);
// Search data whose key column value is keyCode
Where where = new Where();
where.Equal("key", "keyCode");
SendQueue.Enqueue(Backend.GameData.Update, "tableName", where, param, (callback) =>
{
// Post-process
});
ReturnCase
Success cases
When the modification is successful
statusCode : 204
message : Success
Error cases
(Schema) When there is an attempt to modify a column whose schema is not defined
statusCode : 400
errorCode : BadParameterException
message : bad column does not exist., The invalid column does not exist.
(Schema) When the data type of the column declared upon defining the schema is different from that of the column to be updated
statusCode : 400
errorCode : BadParameterException
message : bad {column name} dataType, Invalid {column name} dataType
(Schema) When the size of the list selected upon declaring the list column in the schema is different from the size of the list entered in param
statusCode : 400
errorCode : BadParameterException
message : bad list data length, Invalid list data length
(Schema) When the size of the map selected upon declaring the map column in the schema is different from the size of the map entered in param
statusCode : 400
errorCode : BadParameterException
message : bad map data length, Invalid map data length
When the total number of columns to be modified is over 290
statusCode : 400
errorCode : ValidationException
message : Invalid UpdateExpression: Expression size has exceeded the maximum allowed size;
When the tableName does not exist
statusCode : 404
errorCode : NotFoundException
message : table not found, table cannot be found
When the user searches the table to be updated with the where condition, but the table does not exist
statusCode : 404
errorCode : NotFoundException
message : gameInfo not found, gameInfo cannot be found.
(Schema) When there is an attempt to search for a column whose schema is not defined with the where condition
statusCode : 404
errorCode : NotFoundException
message : gameInfo not found, gameInfo cannot be found
When the eight fields (partition, gamer_id, inDate, updatedAt, sender, receiver, reservationDate, and owner_inDate) are included in param
statusCode : 405
errorCode : MethodNotAllowedParameterException
message : MethodNotAllowed {param value}, Unavailable {param value}
When there is an attempt to modify an inactive table
statusCode : 412
errorCode : PreconditionFailed
message : inactiveTable prerequisites are not met.
When the size of data to be updated exceeds 400 KB
statusCode : 413
errorCode : ServerErrorException
message : request entity too large