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import { _IStatementExecutor, _Transaction, StatementResult } from '../interfaces-private.ts';import { ExecHelper } from './exec-utils.ts';import { CommitStatement, RollbackStatement, StartTransactionStatement, BeginStatement } from 'https://deno.land/x/pgsql_ast_parser@12.0.1/mod.ts';import { ignore } from '../utils.ts';
export class CommitExecutor extends ExecHelper implements _IStatementExecutor {
    constructor(statement: CommitStatement) {        super(statement)    }
    execute(t: _Transaction): StatementResult {        t = t.commit();        // recreate an implicit transaction if we're at root        // (I can see how its usfull, but this is dubious...)        if (!t.isChild) {            t = t.fork();        }        return this.noData(t, 'COMMIT');    }
}
export class RollbackExecutor extends ExecHelper implements _IStatementExecutor {    constructor(statement: RollbackStatement) {        super(statement);        ignore(statement);    }
    execute(t: _Transaction): StatementResult {        t = t.rollback();        return this.noData(t, 'ROLLBACK');    }}

export class BeginStatementExec extends ExecHelper implements _IStatementExecutor {    constructor(statement: BeginStatement | StartTransactionStatement) {        super(statement);        ignore(statement);    }
    execute(t: _Transaction): StatementResult {        t = t.fork();        return this.noData(t, 'BEGIN');    }}