Module schema 

Schema analysis module for FK-aware operations.

This module provides:

• Data models for table schemas, columns, and foreign keys
• MySQL DDL parsing for extracting schema information
• Dependency graph construction with topological sorting
• Cycle detection for handling circular FK relationships

Structs

Column

Column definition within a table

ColumnId

Unique identifier for a column within a table

ForeignKey

Foreign key constraint definition

Schema

Complete database schema

SchemaBuilder

Builder for constructing schema from DDL statements

SchemaGraph

Schema dependency graph built from foreign key relationships.

TableId

Unique identifier for a table within a schema

TableSchema

Complete table schema definition

TopoSortResult

Result of topological sort

Enums

ColumnType

SQL column type classification

Functions

extract_alter_table_name

Extract table name from ALTER TABLE statement

extract_create_table_name

Extract table name from CREATE TABLE statement

parse_column_list

Parse a comma-separated column list, stripping backticks and whitespace

split_table_body

Split table body by commas, respecting nested parentheses