feat: initial release

Rust library, CLI, and Python bindings for extracting table-level and
column-level data lineage from SQL statements.

Supports SELECT, INSERT, CREATE TABLE AS, UPDATE, DELETE, MERGE, CTEs
(including WITH RECURSIVE), UNION, subqueries, window functions, and
optional CatalogProvider for SELECT * expansion.

Author: funcpp

.envrc

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+use flake

.gitignore

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+/target
+Cargo.lock
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.egg-info/
+dist/
+.venv/
+*.so
+*.dylib
+*.dll
+
+# Nix / direnv
+.direnv/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+.DS_Store

ARCHITECTURE.md

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+# Architecture
+
+This document describes how sqllineage is structured and how to navigate
+the codebase. It is intended for contributors and anyone reading the source.
+
+## Overview
+
+sqllineage takes a SQL string and produces, for each statement, a list of
+input/output tables and a mapping from each output column to the source
+columns it derives from. The analysis is purely syntactic — it does not
+execute SQL or connect to a database. An optional `CatalogProvider` can be
+supplied to resolve `SELECT *` and disambiguate unqualified columns.
+
+The work happens in two phases:
+
+1. **Build** (`build/`) — walk the AST produced by `sqlparser` and construct
+   a dependency graph (`RawGraph`).
+2. **Resolve** (`resolve/`) — traverse the graph, resolve column references
+   through scope chains, and produce the final `AnalyzeResult`.
+
+Each statement is processed independently with its own graph and scope tree.
+
+## Build phase
+
+`build/statement.rs` is the entry point. It pattern-matches on the sqlparser
+`Statement` enum to identify the output table and delegate to the appropriate
+handler. INSERT, CTAS, UPDATE, DELETE, and MERGE each have specific logic for
+extracting column-level assignments.
+
+`build/query.rs` handles `Query` — first processing any CTEs (each gets its
+own scope with bindings registered in the parent), then the query body. UNION
+is handled by giving each side its own scope and merging output columns
+positionally. `SetExpr::Update` / `SetExpr::Insert` (for CTE-wrapped DML
+like `WITH ... UPDATE`) delegates back to statement dispatch.
+
+`build/select.rs` processes a `SELECT`: FROM first (registering bindings),
+then projection (creating Output nodes). When a FROM item is a CTE reference,
+the existing CTE binding is reused instead of creating a new Table binding.
+Anonymous (alias-less) derived tables are tracked on the scope separately.
+
+`build/expr.rs` recursively walks expressions to collect leaf column
+references. Window function PARTITION BY / ORDER BY clauses are included
+as ancestors.
+
+### Graph and scope structures
+
+`graph/node.rs` defines four node types: Output (projection result), Ref
+(qualified column like `t.col`), Unqualified (bare column name), and Star
+(`SELECT *`).
+
+`graph/scope.rs` models SQL name resolution. Each scope holds a map of
+bindings (Table, Cte, or DerivedTable) and a list of output columns. Lookup
+walks the parent chain with nearest-scope-wins shadowing. CTE body scopes
+are separated from CTE registration scopes to prevent false ambiguity.
+
+## Resolve phase
+
+`resolve/mod.rs` iterates the root scope's output columns and resolves each
+one. Named columns resolve through scope lookup: Table bindings produce
+`Concrete` origins, CTE/DerivedTable bindings follow through `output_columns`
+to the base table recursively. Star nodes go through the same chain via
+`expand_star()`.
+
+Every resolve path must handle all three binding types (Table, Cte,
+DerivedTable) uniformly. This is the most important invariant in the
+codebase — past bugs came from paths that only handled `Binding::Table`.
+
+`resolve/topo.rs` validates that the graph is a DAG after removing recursive
+CTE back-edges. `resolve/catalog.rs` applies the optional `CatalogProvider`
+as a post-processing step.
+
+## Upgrading sqlparser
+
+When sqlparser adds new `Statement` or `Expr` variants, the build layer
+may need updating:
+
+- New `Statement` variant → add a match arm in `statement.rs` (or let
+  it fall through to `StatementType::Other` if it carries no lineage).
+- New `Expr` variant → add a match arm in `expr.rs` (the catch-all
+  emits `WarningKind::UnhandledExpression`).
+- Renamed/restructured fields → follow compiler errors.
+
+If sqlparser already parses a construct, sqllineage generally handles it
+automatically through the existing AST traversal. Changes to sqllineage
+itself should only be needed when sqlparser's representation changes.
+
+## Module map
+
+| Path | Responsibility |
+|------|---------------|
+| `lib.rs` | `pub fn analyze()` — parses SQL, runs build+resolve per statement |
+| `types.rs` | All public types: `AnalyzeResult`, `TableRef`, `ColumnMapping`, etc. |
+| `dialect.rs` | Maps `Dialect` enum to sqlparser dialect implementations |
+| `build/statement.rs` | Statement-level dispatch and column mapping for DML |
+| `build/query.rs` | CTE registration, UNION merge, CTE-wrapped DML |
+| `build/select.rs` | FROM binding registration, projection processing |
+| `build/expr.rs` | Recursive expression traversal for ancestor collection |
+| `graph/node.rs` | `RawNode` enum (Output, Ref, Unqualified, Star) |
+| `graph/edge.rs` | `RawEdge` with `EdgeKind` (Direct, ViaExpression, etc.) |
+| `graph/scope.rs` | `ScopeTree` with bindings, output columns, parent chain |
+| `resolve/mod.rs` | Scope-chain resolution, Star expansion, `ColumnMapping` assembly |
+| `resolve/topo.rs` | Kahn's algorithm for DAG validation |
+| `resolve/catalog.rs` | `CatalogProvider` application (Wildcard/Ambiguous refinement) |

Cargo.toml

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+[workspace]
+resolver = "3"
+members = ["sqllineage", "sqllineage-python"]
+default-members = ["sqllineage"]
+

LICENSE-APACHE

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LICENSE-MIT

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 funcpp
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
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