/** Serialized column definition — what lives in state.json. */
export interface SerializedColumn {
    name: string;
    sqlType: 'text' | 'integer' | 'real' | 'blob';
    isPrimaryKey: boolean;
    isAutoIncrement?: boolean;
    isNotNull: boolean;
    isUnique: boolean;
    hasDefault: boolean;
    defaultValue?: unknown;
    referencesTable?: string;
    referencesColumn?: string;
    onDelete?: string;
    onUpdate?: string;
}
/** Serialized table definition — what lives in state.json. */
export interface SerializedTable {
    name: string;
    columns: SerializedColumn[];
    indexes: SerializedIndex[];
    primaryKeyColumns?: string[];
}
/** Serialized index definition. */
export interface SerializedIndex {
    name: string;
    columns: string[];
    unique: boolean;
}
/** Full schema state — the content of state.json. */
export interface SchemaState {
    version: number;
    tables: Record<string, SerializedTable>;
}
export interface AddTableOp {
    type: 'addTable';
    table: SerializedTable;
}
export interface DropTableOp {
    type: 'dropTable';
    tableName: string;
    columns?: SerializedColumn[];
}
export interface RenameTableOp {
    type: 'renameTable';
    from: string;
    to: string;
}
export interface AddColumnOp {
    type: 'addColumn';
    tableName: string;
    column: SerializedColumn;
}
export interface DropColumnOp {
    type: 'dropColumn';
    tableName: string;
    columnName: string;
}
export interface RenameColumnOp {
    type: 'renameColumn';
    tableName: string;
    from: string;
    to: string;
}
export interface CreateIndexOp {
    type: 'createIndex';
    tableName: string;
    index: SerializedIndex;
}
export interface DropIndexOp {
    type: 'dropIndex';
    indexName: string;
}
export interface ModifyColumnOp {
    type: 'modifyColumn';
    tableName: string;
    columnName: string;
    changes: {
        isNotNull?: boolean;
        hasDefault?: boolean;
        defaultValue?: unknown;
    };
}
export interface ModifyIndexOp {
    type: 'modifyIndex';
    tableName: string;
    indexName: string;
    from: SerializedIndex;
    to: SerializedIndex;
}
export interface RebuildTableOp {
    type: 'rebuildTable';
    tableName: string;
    oldTable: SerializedTable;
    newTable: SerializedTable;
}
export type MigrationOperation = AddTableOp | DropTableOp | RenameTableOp | AddColumnOp | DropColumnOp | RenameColumnOp | CreateIndexOp | DropIndexOp | ModifyColumnOp | ModifyIndexOp | RebuildTableOp;
export interface MigrationFile {
    name: string;
    operations: MigrationOperation[];
}