Flink SQL Language Server

A browser language server (LSP) for Apache Flink SQL, in addition to a simple vscode extension.

The language features are mainly implemented by Antlr4ts.

Functionality

This Language Server works for Flink SQL file. It has the following language features:

• Completions
• Diagnostics regenerated on each file change or configuration change
• Rename
• References
• FoldingRanges
• Hover
• DocumentFormatting
• CodeAction: QuickFix
• Custom Command
  • extract SQL structure
  • register schemas: auto-completion will include registered schemas

// structure would be undefined if uri is invalid
const structure = await commands.executeCommand<StructureResult | undefined>(
        'extension.flinkSQL.extractStructure', // or ServerCommands.EXTRACT_SQL_STRUCTURE
        window.activeTextEditor.document.uri.toString()
);
if (structure) {
  // Do something
}

await commands.executeCommand<void>('extension.flinkSQL.registerSchemas', {
  catalogs: [{ kind: 'catalog', label: 'testCatalog' }],
  databases: [{ kind: 'database', catalog: 'testCatalog', label: 'testDatabase' }],
  tables: [{ kind: 'table', catalog: 'testCatalog', database: 'testDatabase', label: 'testTable' }]
});