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A ping packet can be sent over a connection using the connection. This method will send a ping packet to the server and when the server responds, the callback will fire. If an error occurred, the callback will fire with an error argument. Every operation takes an optional inactivity timeout option. This allows you to specify appropriate timeouts for operations. It is important to note that these timeouts are not part of the MySQL protocol, and rather timeout operations through the client. This means that when a timeout is reached, the connection it occurred on will be destroyed and no further operations can be performed.

This module comes with a consistent approach to error handling that you should review carefully in order to write solid applications. Most errors created by this module are instances of the JavaScript Error object. Additionally they typically come with two extra properties:. Fatal errors are propagated to all pending callbacks.

In the example below, a fatal error is triggered by trying to connect to an invalid port. Therefore the error object is propagated to both pending callbacks:.

Normal errors however are only delegated to the callback they belong to. So in the example below, only the first callback receives an error, the second query works as expected:. Last but not least: If a fatal errors occurs and there are no pending callbacks, or a normal error occurs which has no callback belonging to it, the error is emitted as an 'error' event on the connection object.

This is demonstrated in the example below:. Note: 'error' events are special in node. If they occur without an attached listener, a stack trace is printed and your process is killed.

You should always provide callbacks to your method calls. If you want to ignore this advice and suppress unhandled errors, you can do this:.

This module is exception safe. That means you can continue to use it, even if one of your callback functions throws an error which you're catching using 'uncaughtException' or a domain.

For your convenience, this driver will cast mysql types into native JavaScript types by default. The following mappings exist:. Note text in the binary character set is returned as Buffer , rather than a string. You can also pass a function and handle type casting yourself. You're given some column information like database, table and name and also type and length. If you just want to apply a custom type casting to a specific type you can do it and then fallback to the default.

The function is provided two arguments field and next and is expected to return the value for the given field by invoking the parser functions through the field object. The field argument is a Field object and contains data about the field that need to be parsed. The following are some of the properties on a Field object:. The next argument is a function that, when called, will return the default type conversion for the given field.

When getting the field data, the following helper methods are present on the field object:. The MySQL protocol is a text-based protocol. This means that over the wire, all field types are represented as a string, which is why only string-like functions are available on the field object.

MobiDB Database Designer. Claim This Profile. MemSQL Slideshare. View Slideshare. More Alternatives. No reviews yet. Rate this app or be the first to review. What are the main features of MemSQL? How much does MemSQL cost? Cost not specified. Free trial : Available. Who are the typical users of MemSQL? Switch to a different method from the dropdown menu.

You can use the first tab to connect, and then see the created URL in the second tab. Connectivity Troubleshooting If you get problems connecting to the database, please remember : Press the ping button in the connection dialog to make sure the host and port are reachable.

Enable Remote connections as they are not always enabled by default. On the other hand, the top reviewer of SingleStore writes "MySQL Big Brother with built-in data pipeline, high concurrency, and blazing fast analytical queries". We monitor all Relational Databases reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors.

We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary. Sign In. Home Oracle Database vs. Oracle Database vs. SingleStore report.

Cancel You must select at least 2 products to compare! Oracle Database. Read Oracle Database reviews. Read 1 SingleStore review. Featured Review. Stable, scalable, database; the heart of the environment. It's quite an important part of the business. Most of the core banking servers are using Oracle Database. It's the heart of the environment.

Click in the address bar — just below the ribbon tabs, and above all the files — and type:. This will create a command prompt in this directory. This creates the. Open this.

Run as root without requiring a password:. Open a terminal in any directory and launch the visudo tool by typing:. This file lists programs and users that are allowed to switch to root without a password. Use the arrow keys to get to the bottom of the file, and then add this line, swapping in your username:.

Usernames are case-sensitive. The Microsoft world tends to prefer mixed case, whereas the Unix world prefers — and sometimes requires — all lower-case. Test that it works correctly by typing:. Update Ubuntu:. Open a command prompt or PowerShell window. You may wish to run these Linux upgrade commands periodically to keep Ubuntu updated. In future versions of Windows, the system may run these commands for you, as part of Windows Update.

This is easy! You can verify this because your terminal will have changed to show root at the beginning. Be careful of long lines here. Some of these commands may wrap to a second in this post, and if so, make sure you enter them as a single command.

This tool can be handy for scripting backups or tweaking data. All of these tools are installed, but none are running yet. Note : Unlike installing software, creating the cluster needs to be done as a regular user, not as root. Grab your license key from singlestore.

Alternatively, you can run the setup wizard, and configure the cluster in a browser. Also alternatively, you can create a YAML file describing your cluster and run memsql-deploy setup-cluster —cluster-file memsql. Note in the output both nodes are running:. You can close this terminal, and SingleStore Studio will stay running until you reboot.