So far I tried
jdbcTemplate.update("INSERT INTO INFO (id, my_date)
"VALUES(?, ?)", 1, "sysdate");
Also tried with namedParameterJdbcTemplate by just using a map.
Map namedParameters = new HashMap();
namedParameters.put("id", 1);
namedParameters.put("my_date", "sysdate");
namedParameterJdbcTemplate.update("INSERT INTO INFO (id, my_date)
"VALUES(:id, :my_date)",namedParameters);
After trying all the above the the Exception is is below
org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [INSERT INTO INFO (id, my_date)
"VALUES(?, ?)]; ORA-01858: a non-numeric character was found where a numeric was expected
; nested exception is java.sql.SQLDataException: ORA-01858: a non-numeric character was found where a numeric was expected
at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:82) ~[spring-jdbc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73) ~[spring-jdbc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:82) ~[spring-jdbc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:655) ~[spring-jdbc-4.3.17.RELEASE.jar:4.3.17.RELEASE]
Found this link, where they claim is possible. I don't see how, unless I am doing something wrong. Any suggestion?
http://forum.spring.io/forum/spring-projects/data/99020-is-it-possible-to-use-oracle-s-sysdate-with-simplejdbcinsert
As an alternative, you could use the current timestamp available in Java:
Timestamp sysdate = new Timestamp(System.currentTimeMillis());
Map namedParameters = new HashMap();
namedParameters.put("id", 1);
namedParameters.put("my_date", sysdate);
Your Java code doesn't know what sysdate is, it's a specific variable within the Oracle database. In a similar vein to Tim's answer I would specify a java variable in your code, albeit in a similar format to your second attempt:
Map<String, Object> namedParameters = new HashMap<String, Object>();
namedParameters.put("id", 1);
namedParameters.put("my_date", new Date());//java.util.Date
jdbcTemplate.update("INSERT INTO info (id, my_date) VALUES (:id, :my_date)", namedParameters);
Related
So I'm trying to check if some of my values match, for that I'm using an SQLite object and casting it as date and passing it as a parameter which is also a Date, I just want to know if this is the right way to do it?
"AND R1.TIMING = ?
AND R1.VARIETY = ?
AND R1.JOBACRES = ?
AND CAST (R1.PLANTINGDATE AS DATE) = ?
new object[] { item.TIMING, item.VARIETY, item.JOBACRES, item.PLANTINGDATE.Date }).ToList();
This is written in C#, since I want to execute this query in C# with SQLite, any inputs would be helpful
I'm trying to query all the rows which are created the last one week. I have created an index for created key in AWS console. In my query, I added the Key Condition with ComparisonOperator.GT for the created key. But When I run the query it throws an error like Query key condition not supported. If I give the condition as ComparisonOperator.EQ, it will return a single row. But not working for the ComparisonOperator.GT.
Code :
Condition rangeKeyCondition = new Condition();
rangeKeyCondition.withComparisonOperator(ComparisonOperator.GT).withAttributeValueList(new AttributeValue().withS("11:26 23/10/2018 "));
Map<String, Condition> keyConditions = new HashMap<String, Condition>();
keyConditions.put("created", rangeKeyCondition);
QueryRequest queryRequest = new QueryRequest();
queryRequest.withTableName(getTableName(TABLE_NAME));
queryRequest.withIndexName("created-index");
queryRequest.withKeyConditions(keyConditions);
QueryResult result = EventStoreInitializer.getAmazonDynamoDBClient().query(queryRequest);
I have read your case so for your desired output you should not create 'created' as Index bz it becomes key for the table and in keyCondition you can't use GT and LT operator.
you need to use FilterExpression and there you can use GT and LT for the 'created' field.
String SQL = "INSERT INTO Employee (name, age, salary) VALUES (:name,:age,:salary)";
Map namedParameters = new HashMap();
namedParameters.put("name", name);
namedParameters.put("age", age);
namedParameters.put("salary", salary);
namedParameterJdbcTemplate.update(SQL, namedParameters);
String SQL = "UPDATE Employee SET age = :age WHERE empid = :empid";
SqlParameterSource namedParameters = new MapSqlParameterSource();
namedParameters.addValue("age", age);
namedParameters.addValue("empid", empid);
namedParameterJdbcTemplate.update(SQL, namedParameters);
Seems both Map and SqlParameterSource are same. But why did API developers added these API's ? Is there any particular scenario to use Map or SqlParameterSource which makes execution faster? Please explain me clearly. Thanks in advance.
Using a Map is fine for simple cases, but there are two benefits to using SqlParamaterSource over a Map.
The first is simply the builder pattern allowing you to add multiple values inline (namedParameters.addValue().addValue().addValue() etc).
The second is more powerful. The jdbcTemplate will auto-determine the sqlType of your map values while the SqlParamaterSource allows you to explicitly use the sqlType of your choice. This can be an issue depending on your database, indexes and parameters.
An example would be Integers and Longs with an Oracle database. The jdbc template will add these objects to your query with surrounding quotes '' making them effectively strings in your database query. If you have a number in your database with leading 0's it will not be found because '0XXXX' will not match 'XXXX'. If you pass in the right sqlType, the jdbc template will do a number comparison without quotes so XXXX will equal XXXX.
When my place holder values were of different datatypes, this (MapSqlParameterSource) really helped me:
String SQL = "UPDATE Employee SET joindate = :joinDate WHERE empid = :empid";
MapSqlParameterSource namedParameters = new MapSqlParameterSource();
namedParameters.addValue("date", joinDate, Types.Date);
namedParameters.addValue("empid", empid, Types.Integer);
namedParameterJdbcTemplate.update(SQL, namedParameters);
I want to create a table in SQLite in which one of the field is for date, in which date and time of current instance should save. Which data type should I use?
I'm planning to use 'timestamp'. How to insert current timestamp value to the field? Also how to write content values for this date field?
SQLite supports the standard SQL variables CURRENT_DATE, CURRENT_TIME, and CURRENT_TIMESTAMP:
INSERT INTO Date (LastModifiedTime) VALUES(CURRENT_TIMESTAMP)
The default data type for dates/times in SQLite is TEXT.
ContentValues do not allow to use generic SQL expressions, only fixed values, so you have to read the current time in Java:
cv.put("LastModifiedTime",
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
INSERT INTO Date (LastModifiedTime) VALUES(DateTime('now'))
Use this site for further reference.
To get the current local(system) time, add the 'localtime' option:
select datetime('now', 'localtime');
I'm using timestamps a lot in my app. For me the best way to keep the timestamp is to convert it in milliseconds. After that it is easy to convert it to any locale.
If you need the current time use System.currentTimeMillis().
Content values are easy to use, you just and field and value, like:
ContentValues ins_reminder = new ContentValues();
ins_reminder.put("REMIND_TIMESTAMP", System.currentTimeMillis());
Since SQLite 3.38.0, there is a unixepoch() function that returns UNIX timestamp in integer. Does the same thing as strftime('%s').
References:
release log draft
check-in
In my case i wanted to have a timestamp with fractions of a second.
The keyword CURRENT_TIMESTAMP has only a precision of YYYY-MM-DD HH:MM:SS (see docs DEFAULT clause).
The function strftime() can return fractions of a second
Example to use strftime() in an INSERT
INSERT INTO YourTable (TimeStamp)
VALUES (strftime('%Y-%m-%d %H:%M:%S:%s'))
Comparison of CURRENT_TIMESTAMP and strftime()
SELECT 'CURRENT_TIMESTAMP' as Timestamp_Command,
CURRENT_TIMESTAMP as TimeStamp_Precision,
'only seconds' as Timestamp_Comment
UNION ALL
SELECT 'strftime(%Y-%m-%d %H:%M:%S:%s)' as Timestamp_Command,
(strftime('%Y-%m-%d %H:%M:%S:%s')) as TimeStamp_Precision,
'with fraction of a second' as Timestamp_Comment
Example to use it in c#
The following is based on bulk insert in sqlite with ado.net
public static void InsertBulk(SqliteConnection connection)
{
connection.Open();
using (var transaction = connection.BeginTransaction())
{
var command = connection.CreateCommand();
command.CommandText =
#"INSERT INTO BulkInsertTable (CreatedOn, TimeStamp)
VALUES ($createdOn, strftime('%Y-%m-%d %H:%M:%S:%s'))";
var parameter3 = command.CreateParameter();
parameter3.ParameterName = "$createdOn";
command.Parameters.Add(parameter3);
// Insert a lot of data
// calling System.DateTime.Now outside the loop is faster
var universalTime = System.DateTime.Now.ToUniversalTime();
for (var i = 0; i < 15_000; i++)
{
parameter3.Value = System.DateTime.Now.ToUniversalTime();
// faster
// parameter3.Value = universalTime;
command.ExecuteNonQuery();
}
transaction.Commit();
}
connection.Close();
}
I've just started my adventure with Cassandra database. I've managed to learn some basics but what I still can't understand is how to work with dates in Cassandra?
So for example in MySQL we have a datetime type for a field and we can query (for example) all fields with creation date less then 2010-01-01. Furthermore we can order the result by creation date field.
How can we achieve the same with Cassandra? How to define the corresponding Column Family and how to query (CQL) it to get the same result?
You can use type DateType to define a column of type DateType in your column family. You should really read this page, it has description and example how to do range query (that is creationdate < 2010-01-01). For ordering, you can refer to the SliceRange but this will probably cover in the cassandra client already. You will probably want to look into the cassandra client to do the query.
This is a snippet on how to do query in cassandra using hector client.
// 2010-01-01
Date date = new Date(1262275200L);
try
{
getConnection();
IndexedSlicesQuery<String, String, String> indexedSlicesQuery = HFactory.createIndexedSlicesQuery(keyspace, ss, ss, ss);
indexedSlicesQuery.setColumnNames("name");
indexedSlicesQuery.addLtExpression("timestamp", ByteBufferUtil.string(date_s.toByteBuffer(date)));
indexedSlicesQuery.addEqualsExpression("searchall", ByteBufferUtil.string(bs.toByteBuffer(true)));
indexedSlicesQuery.setColumnFamily(column_family);
indexedSlicesQuery.setStartKey("");
System.out.println(indexedSlicesQuery.toString());
QueryResult<OrderedRows<String, String, String>> res = indexedSlicesQuery.execute();
List<Row<String, String, String>> list = res.get().getList();
for (Row<?, ?, ?> row : list)
{
System.out.println(row.getKey());
}
}