/**
 * Policy versions table for storing historical policy definitions.
 * Each update to a policy creates a new version record.
 */
export declare const policyVersions: import("drizzle-orm/pg-core").PgTableWithColumns<{
    name: "policy_versions";
    schema: undefined;
    columns: {
        id: import("drizzle-orm/pg-core").PgColumn<{
            name: "id";
            tableName: "policy_versions";
            dataType: "string";
            columnType: "PgUUID";
            data: string;
            driverParam: string;
            notNull: true;
            hasDefault: true;
            isPrimaryKey: true;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: undefined;
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {}>;
        policyId: import("drizzle-orm/pg-core").PgColumn<{
            name: "policy_id";
            tableName: "policy_versions";
            dataType: "string";
            columnType: "PgUUID";
            data: string;
            driverParam: string;
            notNull: true;
            hasDefault: false;
            isPrimaryKey: false;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: undefined;
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {}>;
        version: import("drizzle-orm/pg-core").PgColumn<{
            name: "version";
            tableName: "policy_versions";
            dataType: "number";
            columnType: "PgInteger";
            data: number;
            driverParam: string | number;
            notNull: true;
            hasDefault: false;
            isPrimaryKey: false;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: undefined;
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {}>;
        definition: import("drizzle-orm/pg-core").PgColumn<{
            name: "definition";
            tableName: "policy_versions";
            dataType: "json";
            columnType: "PgJsonb";
            data: unknown;
            driverParam: unknown;
            notNull: true;
            hasDefault: false;
            isPrimaryKey: false;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: undefined;
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {}>;
        changeSummary: import("drizzle-orm/pg-core").PgColumn<{
            name: "change_summary";
            tableName: "policy_versions";
            dataType: "string";
            columnType: "PgText";
            data: string;
            driverParam: string;
            notNull: false;
            hasDefault: false;
            isPrimaryKey: false;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: [string, ...string[]];
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {}>;
        changedBy: import("drizzle-orm/pg-core").PgColumn<{
            name: "changed_by";
            tableName: "policy_versions";
            dataType: "string";
            columnType: "PgVarchar";
            data: string;
            driverParam: string;
            notNull: false;
            hasDefault: false;
            isPrimaryKey: false;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: [string, ...string[]];
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {
            length: 255;
        }>;
        createdAt: import("drizzle-orm/pg-core").PgColumn<{
            name: "created_at";
            tableName: "policy_versions";
            dataType: "date";
            columnType: "PgTimestamp";
            data: Date;
            driverParam: string;
            notNull: true;
            hasDefault: true;
            isPrimaryKey: false;
            isAutoincrement: false;
            hasRuntimeDefault: false;
            enumValues: undefined;
            baseColumn: never;
            identity: undefined;
            generated: undefined;
        }, {}, {}>;
    };
    dialect: "pg";
}>;
/**
 * Type for policy version record from database
 */
export type PolicyVersionRow = typeof policyVersions.$inferSelect;
/**
 * Type for inserting a new policy version
 */
export type NewPolicyVersionRow = typeof policyVersions.$inferInsert;