pub struct JSONWriter;Expand description
JSON writer for QueryResult
Implementations§
Source§impl JSONWriter
impl JSONWriter
Sourcepub fn write(
result: &QueryResult,
config: &OutputConfig,
) -> Result<String, Box<dyn StdError>>
pub fn write( result: &QueryResult, config: &OutputConfig, ) -> Result<String, Box<dyn StdError>>
Write QueryResult to JSON string with deterministic key ordering
§Key Ordering Guarantee
JSON object keys will appear in the SAME order as columns in metadata.columns.
This is critical for testing and ensures deterministic output regardless of
HashMap iteration order.
§Example
If metadata.columns = [c, b, a], the JSON will be:
[
{"c": 1, "b": 2, "a": 3}
]NOT {“a”: 3, “b”: 2, “c”: 1}
§Arguments
result- The query result to convert to JSONconfig- Output configuration for row limits
§Returns
Pretty-printed JSON string or error
Auto Trait Implementations§
impl Freeze for JSONWriter
impl RefUnwindSafe for JSONWriter
impl Send for JSONWriter
impl Sync for JSONWriter
impl Unpin for JSONWriter
impl UnsafeUnpin for JSONWriter
impl UnwindSafe for JSONWriter
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Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more