Expand description
In-progress HawDB-owned PostgreSQL SQL/PGQ syntax frontend.
This crate owns tokens, byte spans, structured syntax errors, and syntax ASTs.
Semantic binding and logical-plan lowering belong to hawdb-sql.
This frontend is not yet selected by Database::query_sql*; the existing
relational execution path still uses upstream sqlparser. Syntax acceptance
alone does not qualify a statement family for production execution.
The SQL/PGQ specification defines the compatibility contract. The implementation and routing checklist tracks the remaining parser/binder differential coverage, catalog durability, and shared query-pipeline qualification required before enabling production routing. Parser selection must be explicit by statement family, never a retry after another parser fails.
Structs§
- Create
Property Graph - Edge
Endpoint - Edge
Table Definition - Element
Exposure - Element
Label Exposure - Expression
Syntax - Graph
Edge Pattern Syntax - Graph
Element Pattern Syntax - Graph
Path Factor Syntax - Graph
Path Syntax - Graph
Pattern Quantifier - Graph
Pattern Syntax - Graph
Table - Graph
Table Column - Identifier
- Labeled
Expression Syntax - Lexer
Config - Locking
Clause Syntax - Order
BySyntax - Postgres
From Syntax - Postgres
Join Syntax - Postgres
Select Syntax - Qualified
Name - Relation
Table Syntax - Span
- Syntax
Error - Table
Alias - Token
- Vertex
Table Definition
Enums§
- Binary
Operator Syntax - Element
Label - Expression
Kind Syntax - Graph
Edge Direction - Graph
Path Primary Syntax - Literal
Syntax - Lock
Strength Syntax - Null
Order Syntax - Order
Direction Syntax - PgqStatement
- Postgres
From Item Syntax - Postgres
Join Kind - Postgres
Statement Syntax - Property
Exposure - Syntax
Error Code - Token
Kind - Unary
Operator Syntax