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kandi X-RAY | jdbc Summary
kandi X-RAY | jdbc Summary
To learn more about this application and the supported properties, please review the following link.
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Top functions reviewed by kandi - BETA
- Processes a dataset sink
- Verify error table
- Returns the list of columns
- Returns the table name
- Create JdbcMessageHandler
- Returns the columns map
- Generates the INSERT statement
- Converts the given source into map
- Create polling flow
- Create message source
- Get the query
- Get the maximum number of rows per poll
- Bean factory method
- Gets the value of the batch size
- Gets the idle timeout
- The factory bean
- Gets the total number of batches
- Non - bootstrap initializer
- Gets the value of initialize property
- Non - bootstrap initializer
- Gets the initial value
- Returns the initial initialization script for the table
- Bean default message group store
- Bean to be reaper for the message store
- Initialize the bean
jdbc Key Features
jdbc Examples and Code Snippets
Community Discussions
Trending Discussions on jdbc
QUESTION
I have an Aurora Serverless instance which has data loaded across 3 tables (mixture of standard and jsonb data types). We currently use traditional views where some of the deeply nested elements are surfaced along with other columns for aggregations and such.
We have two materialized views that we'd like to send to Redshift. Both the Aurora Postgres and Redshift are in Glue Catalog and while I can see Postgres views as a selectable table, the crawler does not pick up the materialized views.
Currently exploring two options to get the data to redshift.
- Output to parquet and use copy to load
- Point the Materialized view to jdbc sink specifying redshift.
Wanted recommendations on what might be most efficient approach if anyone has done a similar use case.
Questions:
- In option 1, would I be able to handle incremental loads?
- Is bookmarking supported for JDBC (Aurora Postgres) to JDBC (Redshift) transactions even if through Glue?
- Is there a better way (other than the options I am considering) to move the data from Aurora Postgres Serverless (10.14) to Redshift.
Thanks in advance for any guidance provided.
...ANSWER
Answered 2021-Jun-15 at 13:51Went with option 2. The Redshift Copy/Load process writes csv with manifest to S3 in any case so duplicating that is pointless.
Regarding the Questions:
N/A
Job Bookmarking does work. There is some gotchas though - ensure Connections both to RDS and Redshift are present in Glue Pyspark job, IAM self ref rules are in place and to identify a row that is unique [I chose the primary key of underlying table as an additional column in my materialized view] to use as the bookmark.
Using the primary key of core table may buy efficiencies in pruning materialized views during maintenance cycles. Just retrieve latest bookmark from cli using
aws glue get-job-bookmark --job-name yourjobnameand then just that in the where clause of the mv aswhere id >= idinbookmarkconn = glueContext.extract_jdbc_conf("yourGlueCatalogdBConnection")connection_options_source = { "url": conn['url'] + "/yourdB", "dbtable": "table in dB", "user": conn['user'], "password": conn['password'], "jobBookmarkKeys":["unique identifier from source table"], "jobBookmarkKeysSortOrder":"asc"}
datasource0 = glueContext.create_dynamic_frame.from_options(connection_type="postgresql", connection_options=connection_options_source, transformation_ctx="datasource0")
That's all, folks
QUESTION
I'm currently building an etl pipeline that pulls data from large oracle tables to mongodb, i want to know exactly what's the difference between JdbcCursor Item reader and Jdbc Paging item reader. which one of them is best suited for large tables. are they thread safe ?
...ANSWER
Answered 2021-Jun-15 at 09:05JdbcCursorItemReader uses a JDBC cursor (java.sql.ResultSet) to stream results from the database and is not thread-safe.
JdbcPagingItemReader reads items in pages of a configurable size and is thread-safe.
QUESTION
I am using IntelliJ and I use H2 database file (.mv.db) and I need to only view its contents whenever I add something in it. I thought I'd be able to file 'Database' tab in IntelliJ but I didn't find it.
This is what I want (image below)
When I click "View --> tool Windows" I don't see a database option (image below)
I am using Maven, is it possible that a certain plugin I downloaded somehow blocked/removed the database option?
I know there's 'Database Navigator' that I can download as a plugin, but its support for JDBC including H2 is experimental. So it's not a good choice for me. I can't seem to find the database plugin, is there any way to obtain it?
...ANSWER
Answered 2021-Jun-14 at 23:46Database tools are a commercial feature, supported in Ultimate edition only.
See the comparison of Community versus Ultimate editions.
The database tools functionality is also available as a separate product, DataGrip.
QUESTION
I have a spring boot 2 app which connects to Mariadb database. This app runs in cloud foundry. It takes database connection properties from VCAP_* env variable.
App works fine and can connect to database. But, I have found out that app is not using hikari configuration specified in application.yml.
Can you please suggest what is wrong here?
build.gradle
...ANSWER
Answered 2021-Apr-02 at 13:45You are using the Spring Cloud Connectors library to create the database connection.
QUESTION
I have 10 data to be inserted into database, but one of them will cause a not null constraint violation. Using JDBC batch update, I'm expecting all valid data processed even some error occurred when processing invalid data, so in the end I'm expecting 9 valid data inserted. The code written below,
...ANSWER
Answered 2021-Jun-14 at 12:37This issue was solved by implementing Oracle DML Error Logging http://www.dba-oracle.com/t_oracle_dml_error_log.htm
QUESTION
I am trying to write some basic CRUD operations using JDBC. I'm wondering if there is a way I can use the same prepared statements for multiple tables. Right now, I have a function for every table, and it seems redundant, but I'm unsure how I can make it better.
Some code examples:
...ANSWER
Answered 2021-Jun-14 at 00:48You can't make a single prepared statement that inserts into different tables depending on some parameter.
Identifiers (for instance, table names) must be fixed at the time you prepare the statement. During the prepare, the SQL engine checks your syntax and also checks that the table exists. Once that validation is done, you can use the prepared statement freely and those checks don't need to be done as you execute. If you could change the table name per execution, then the SQL engine would need to re-check every time, which would partially defeat the purpose of preparing the statement.
Once the statement has been prepared, you can only change values. In other words, parameters can be used in place where you would have used a quoted string literal or a numeric literal, but no other part of the query.
QUESTION
Without spring boot ,we must specify the detail of a data source,right?
...ANSWER
Answered 2021-Jun-14 at 08:59From DataSource Configuration in the docs:
Spring Boot can deduce the JDBC driver class for most databases from the URL. If you need to specify a specific class, you can use the
spring.datasource.driver-class-nameproperty.
So start without configuring anything and just putting the JDBC driver on the classpath. If it would not work, you can manually configure it.
QUESTION
Im trying to deploy a java web app to heroku, I did all their steps from https://devcenter.heroku.com/articles/deploying-java-applications-with-the-heroku-maven-plugin, but when I try to open a page where I have data from db I am getting:
...ANSWER
Answered 2021-Jun-14 at 06:51changing pom.xml solved my problem:
QUESTION
like mentioned in the question I keep getting this exception when I run spring boot app connected to hana db container. This is the exception I get:
...ANSWER
Answered 2021-Jun-14 at 03:35I faced this issue when the password was expired. You can update the password by using
QUESTION
dispatcher-servlet.xml
...ANSWER
Answered 2021-Jun-14 at 02:53This issue is solved after correcting up my code
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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You can use jdbc like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the jdbc component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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