#Sql formatter online access how to
#Sql formatter online access install
#Sql formatter online access code

Moreover, the serializer performs some “formatting” without Arbori. It adds whitespace to mandatory nodes, for instance. In fact, the process is actually a bit more complicated. And then the serializer writes the whitespace and the token text to the final result. It retrieves the leading whitespace for a node’s start position and extracts the token text from the pure SQL input using the node’s start and end position. The serializer loops through the leaf nodes of the parse-tree. 2.3 The Resultīasically, the result of this process is a list of whitespace per position. As a result, you can manage the whitespace before a position of a node through the methods getNewline and putNewline. The global variable struct gives you access to the instance of the formatter and the configuration properties. Now you can really add and remove whitespace wherever you want. This allows you to embed callback functions directly into your Arbori program. Thankfully, the SQL Developer team has added a JavaScript callback feature in version 19.2. You must write an enhancement request so that the SQL Developer team can provide the necessary callback functionality in a future release. Second, you cannot process selected nodes differently. For example, it leaves you in the dark why indentedNodes has two callback functions and both must be called. Granted, there are some comments in the provided Arbori program, and also a description in the SQL Developer Users Guide, but this will only give you a rough idea. These provided Java callback functions have two issues.įirst of all, you don’t know what they do. The position in an Arbori program defines the execution order. Basically, you only need to query the nodes and call the callback functions. target is a global variable and tuple is the result row of an Arbori query.

#Sql formatter online access how to

As an Arbori developer you do not have to care about how to populate these parameters. The formatter provides the following Java callback functions (in the order how they are expected to be called):Įach callback functions gets the parameters target (the parse-tree) and tuple (node to be processed).

#Sql formatter online access code

And under Code Editor -> Format -> Advanced Format -> Custom Format for the Arbori program used to handle whitespace.Under Code Editor -> Format -> Advanced Format for configuration properties such as Line breaks on comma ( after, before, none).SQL Developer stores the configuration in the preferences. The formatter needs the parse-tree and the code formatting configuration as input. In other words, there are neither whitespace nor comments in a parse-tree.Įach node in the parse-tree includes the start and end position within the plain SQL input. The parse-tree is a hierarchical representation of the significant tokens of the input. The parser reads the unformatted plain SQL or PL/SQL input and generates a parse-tree. Please note that these are conceptual components, the actual implementation might look different. I will explain each step and component in the next chapters. The following figure illustrates the formatting process in SQL Developer. Furthermore, it is technically demanding to provide a tool suite that is able to handle different coding styles via configuration. And almost every developer has their own views on what makes code look good. Ultimately, it’s all about beautifying the code. Because the formatting requirements are very different.

How Does Formatting Work?įormatting is all about adding (or removing) whitespace (line breaks, spaces or tabs) between significant tokens.

#Sql formatter online access install

If you only want to activate the coding styles suggested by the Trivadis PL/SQL & SQL Coding Guidelines, install the settings as described here. In this blog post I explain how the formatter works and how the output can be tweaked using two simple SQL queries. And now I must admit that I’m really impressed with the formatting capabilities of the latest versions of SQL Developer. Version 19.2 brought us dynamic JavaScript actions within the parse-tree query language Arbori. In 2017 Oracle released version 4.2 with a new formatter and has been improving it ever since. But the capabilities of the formatter were disappointing. Back then version 4.0 was the latest and greatest.