Module backup 

Backup utilities for safe migrations.

Provides pre-migration impact analysis and snapshot creation.

Structs

MigrationImpact

Impact analysis result for a migration command

Enums

MigrationChoice

User choice for migration

SnapshotType

Snapshot type for different backup scenarios

Constants

DATA_SNAPSHOTS_SCHEMA

Schema for data snapshots table (QAIL format)

Functions

analyze_impact

Analyze the impact of a migration command

backup_columns

Backup specific columns from a table

backup_table

Backup a table to CSV file using COPY protocol (AST-native)

create_db_snapshots

Create database snapshots for all destructive operations (Phase 2)

create_snapshots

Create snapshots for all destructive operations

data_snapshots_ddl

Generate data snapshots table DDL

display_impact

Display impact analysis to user

ensure_snapshots_table

Ensure data snapshots table exists

list_snapshots

List available snapshots for a migration version

prompt_migration_choice

Prompt user for migration choice

restore_column_from_db

Restore column data from database snapshot

snapshot_column_to_db

Create database-stored snapshot for a dropped column (Phase 2)

snapshot_table_to_db

Create database-stored snapshot for a dropped table (Phase 2)