Package dev.frostlake.executor.udf

package dev.frostlake.executor.udf
  • Class
    Description
    ChildFirstUdfClassLoader
    Classloader for IMPORTS handler jars that prefers the jar (and its stage-sibling dependency jars) over the engine's classpath — the equivalent of Snowflake running a UDF against the dependency set its PACKAGES clause supplies, not against whatever the warehouse happens to have loaded.
    InMemoryClassLoader
    In-memory class loader
    InMemoryJavaFile
    In-memory Java file object
    InMemoryJavaFileManager
    In-memory file manager
    JarHandlerLoader
    Loads a pre-compiled handler class from the JAR(s) named in a UDF/procedure's IMPORTS clause — the alternative to an inline AS $$ … $$ body.
    JavaFunctionCompiler
    Compiles and executes inline Java user-defined functions
    JavaProcedureExecutor
    Executes inline Java stored procedures by compiling them at runtime.
    RoutineImports
    What an IMPORTS = ('@stage/file.jar') clause has to be true of at CREATE time.
    TemporaryObjectStatements
    Whether a statement creates a TEMPORARY object, and which kind Snowflake calls it — the question an owner's rights stored procedure has to answer before running a handler's statement.
    TruffleLogBridge
    Routes Truffle/polyglot log output into SLF4J — the "configure logging using the polyglot embedding API" option: installed as the engine log handler, so GraalVM's warnings and diagnostics land in the engine log (with per-language logger names under the polyglot. prefix) instead of being printed to stderr.
    UdfConsoleCapture
    Routes a JVM-handler UDF's console output (System.out/System.err written on the invoking thread) into the engine log instead of the embedder's console.
    UdfConsolePrintStream
    The PrintStream type UdfConsoleCapture installs over System.out/ System.err — a plain auto-flushing stream whose distinct class lets the capture recognize (via instanceof) whether its wrapper is still installed after a test harness swaps the system streams.
    UdfConsoleStream
    The OutputStream behind UdfConsolePrintStream: bytes written by a thread inside a UDF handler (UdfConsoleCapture.isCapturing()) are buffered per thread and relayed to the engine log line by line; every other write passes straight through to the original stream.
    UdfLanguageRuntime
    Executes UDFs and stored procedures of one UdfLanguage.
    UdfRuntimes
    Registry of the UdfLanguageRuntime providers on the classpath, discovered once at first use.