Crate llkv_sql 

SQL interface for LLKV.

This crate provides the SqlEngine, which parses SQL statements and executes them using the LLKV runtime. It serves as the primary user-facing interface for interacting with LLKV databases.

SQL String → sqlparser → AST → Plan → Runtime → Storage

The SQL engine:

1. Parses SQL using sqlparser
2. Converts AST to execution plans
3. Delegates to llkv-runtime for execution
4. Returns results as Arrow RecordBatch instances or row counts

Transactions

By default, each statement executes in its own auto-commit transaction. Use explicit transaction control for multi-statement transactions:

Type System

SQL types are mapped to Arrow data types (the following is a non-exhaustive list):

• INT, INTEGER, BIGINT → Int64
• FLOAT, DOUBLE, REAL → Float64
• TEXT, VARCHAR → Utf8
• DATE → Date32

Structs

PreparedStatement

SelectExecution

Streaming execution handle for SELECT queries.

SqlEngine

Enums

RuntimeStatementResult

SqlParamValue

StatementExpectation

TransactionKind

Transaction kind enum representing transaction control operations.

Functions

clear_pending_statement_expectations

register_statement_expectation

Type Aliases

SqlResult