Module exec 

Query execution: the Connection API and the read-query executor.

This layer ties the pieces together: parse SQL (crate::sql), resolve names against the schema catalog (crate::schema), scan b-trees (crate::btree), decode records (crate::format::record), and evaluate expressions (eval) to produce result rows.

It implements an operational, iterator-style executor rather than emitting VDBE bytecode. The observable semantics (row order, type coercion, NULL handling) follow SQLite; the bytecode representation the roadmap describes is an internal-representation refactor we can layer in later without changing results. The Connection reads (query) and writes (execute) over a writable pager, an in-memory database, or — read-only — a WAL-mode database (the -wal overlay is detected automatically).

Modules

datetime

Date/time functions and printf/format.

eval

Expression evaluation with SQLite value semantics.

func

Built-in scalar functions.

json

A minimal JSON value model with the parser, serializer, and path navigation behind SQLite’s core JSON functions (json, json_extract, json_type, …).

vdbe

A minimal register-machine (VDBE) IR and interpreter.

Structs

Connection

A database connection. Supports reading (query) and writing (execute), over a file or in memory.

QueryResult

The result of a query: column labels and the materialized rows.

Traits

AggregateFunction

A user-defined aggregate’s accumulator: step is called once per group row with the evaluated argument values, then finalize produces the result. A fresh accumulator is created (by the registered factory) for each group.

Type Aliases

AggregateFactory

Builds a fresh AggregateFunction accumulator per group. Registered with Connection::register_aggregate_function.

ScalarFunction

A user-defined scalar function: it receives its evaluated argument values and returns a result Value (or an error). Registered with Connection::register_function.