Module encoder 

PostgreSQL Encoder (Visitor Pattern)

Compiles Qail AST into PostgreSQL wire protocol bytes. This is pure, synchronous computation - no I/O, no async.

Architecture

Layer 2 of the QAIL architecture:

• Input: Qail (AST)
• Output: BytesMut (ready to send over the wire)

The async I/O layer (Layer 3) consumes these bytes.

Structs

PgEncoder

Takes a Qail and produces wire protocol bytes. This is the “Visitor” in the visitor pattern.

Enums

Param

Zero-copy parameter for ultra-fast encoding. Uses borrowed slices to avoid any allocation or copy.