import type { ColumnSchema, ForeignKeySchema, IndexSchema, QuerierPool, RawRow, SqlQuerier } from '../../type/index.js';
import { AbstractSqlSchemaIntrospector } from './abstractSqlSchemaIntrospector.js';
/**
 * PostgreSQL schema introspector
 */
export declare class PostgresSchemaIntrospector extends AbstractSqlSchemaIntrospector {
    protected readonly pool: QuerierPool;
    constructor(pool: QuerierPool);
    protected getTableNamesQuery(): string;
    protected tableExistsQuery(): string;
    protected parseTableExistsResult(results: RawRow[]): boolean;
    protected getColumnsQuery(_tableName: string): string;
    protected getIndexesQuery(_tableName: string): string;
    protected getForeignKeysQuery(_tableName: string): string;
    protected getPrimaryKeyQuery(_tableName: string): string;
    protected mapTableNameRow(row: {
        table_name: string;
    }): string;
    protected mapColumnsResult(_querier: SqlQuerier, _tableName: string, results: PostgresColumnRow[]): Promise<ColumnSchema[]>;
    protected mapIndexesResult(_querier: SqlQuerier, _tableName: string, results: {
        index_name: string;
        columns: string[];
        is_unique: boolean;
    }[]): Promise<IndexSchema[]>;
    protected mapForeignKeysResult(_querier: SqlQuerier, _tableName: string, results: {
        constraint_name: string;
        columns: string[];
        referenced_table: string;
        referenced_columns: string[];
        delete_rule: string;
        update_rule: string;
    }[]): Promise<ForeignKeySchema[]>;
    protected mapPrimaryKeyResult(results: {
        column_name: string;
    }[]): string[] | undefined;
    protected normalizeType(dataType: string, udtName: string): string;
    protected parseDefaultValue(defaultValue: string | null): unknown;
    protected isAutoIncrement(columnDefault: string | null, isIdentity: string): boolean;
}
type PostgresColumnRow = {
    column_name: string;
    data_type: string;
    udt_name: string;
    is_nullable: string;
    column_default: string | null;
    is_primary_key: boolean;
    is_identity: string;
    is_unique: boolean;
    character_maximum_length: number | null;
    numeric_precision: number | null;
    numeric_scale: number | null;
    column_comment: string | null;
};
export {};
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