Module result 

Execution Result Types

This module provides result types for SQL query execution.

Structs

AliasedResult

Neutral result wrapper that changes column presentation only.

ColumnarResult

Columnar result that stores data column-major and materializes rows lazily.

DistinctOnResult

DISTINCT ON result — keeps only the first row per unique combination of the specified key columns. Uses hash-based deduplication so the input does not need to be sorted by the key columns (ORDER BY controls which row is “first” because the input stream preserves ORDER BY order). Memory usage is O(groups) where groups is the number of unique key combinations, not total rows.

DistinctResult

Streaming distinct result that removes duplicate rows on-the-fly

ExecResult

Execution result for DML operations (INSERT, UPDATE, DELETE)

ExecutorResult

ExprMappedResult

Expression-based mapped result with pre-compiled projections

FilteredResult

Filtered result that applies a WHERE clause to an underlying result

LimitedResult

Limited result that applies LIMIT and OFFSET to an underlying result

OrderedResult

Ordered result that sorts rows by ORDER BY expressions

ProjectedResult

Projected result that removes extra columns (e.g., ORDER BY columns not in SELECT)

RadixOrderSpec

Order specification for radix sort

ScannerResult

Neutral query-result adapter backed directly by a storage scanner.

StreamingProjectionResult

Streaming projection result that projects columns row-by-row

TopNResult

Top-N result using a bounded heap for ORDER BY + LIMIT optimization

Type Aliases

ExecutionResult

Internal streaming output of SQL execution.