// playground

Run the analyzer in your browser

The real SurrealGuard engine, compiled to WebAssembly — no install, no server, no database. Edit the schema or the query for live diagnostics: findings are underlined where they happen, hover a squiggle for the message, click a row to jump to its span. Every statement's inferred response type is set out in full below the query, across as many lines as it takes.

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Schema (.surql)

DEFINE TABLE user SCHEMAFULL;
DEFINE FIELD name ON user TYPE string;
DEFINE FIELD age ON user TYPE int;
DEFINE FIELD email ON user TYPE option<string>;

DEFINE TABLE post SCHEMAFULL;
DEFINE FIELD title ON post TYPE string;
DEFINE FIELD author ON post TYPE record<user>;

DEFINE TABLE follows TYPE RELATION IN user OUT user SCHEMAFULL;
DEFINE FIELD since ON follows TYPE datetime;

DEFINE TABLE wrote TYPE RELATION IN user OUT post;

Query (.surql)

SELECT name, ssn FROM user WHERE age > 18;

Diagnostics · live

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Everything runs locally — nothing you type leaves the page. · Every diagnostic code · Run it on your own project