Package com.onec.schema

package com.onec.schema

Class	Description
ColumnModel	Desired state of a single column, derived from metadata.
DatabaseIntrospector	Reads the live database structure (tables and their columns) from INFORMATION_SCHEMA, which both H2 and PostgreSQL expose.
DatabaseIntrospector.DbState	Live tables and columns, keyed by upper-cased table name.
MigrationPlan	The ordered set of changes that would bring the database in line with the metadata.
SchemaChange	One change in a MigrationPlan: what it is, the SQL that performs it, and whether it can lose data (destructive changes are skipped unless onec.schema.allow-destructive=true).
SchemaChange.Type
SchemaDiffEngine	Computes the MigrationPlan that brings the live database in line with the metadata-derived SchemaModel.
SchemaGenerator	Renders CREATE TABLE IF NOT EXISTS DDL for everything in the metadata registry.
SchemaHistoryRepository	Persistence for onec_schema_history: one row per applied schema change-set (kind SCHEMA, carrying the metadata snapshot and the DDL that was executed) and one row per executed AppMigration (kind MIGRATION, claimed via a unique constraint so concurrent instances run each migration exactly once).
SchemaMigrator	Additive-only schema evolution: adds columns that exist in the metadata model but not in the live database.
SchemaMode	How the framework treats schema differences at startup (onec.schema.mode).
SchemaModel	The full desired database state derived from the MetadataRegistry: framework tables (sequences, outbox) plus one TableModel per catalog, document, tabular section, register, enumeration and the constants table.
SchemaModelBuilder	Builds the desired SchemaModel from the metadata registry.
SchemaSnapshot	A point-in-time record of the metadata-derived schema, persisted as JSON in onec_schema_history.
SchemaSnapshot.ColumnSnapshot
SchemaSnapshot.TableSnapshot
SchemaUpgrader	Startup schema lifecycle: scans nothing itself — it takes the already-built MetadataRegistry, derives the desired SchemaModel, diffs it against the live database (and the previous SchemaSnapshot from onec_schema_history), and then acts according to SchemaMode.
SqlDialect	Identifies the target database so upsert helpers can emit portable SQL.
TableModel	Desired state of a single table, derived from metadata.