Le Viet
81 lines
1.8 KiB
JavaScript
81 lines
1.8 KiB
JavaScript
'use strict';
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const uuidv4 = require('uuid/v4');
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const TransactionQueries = {
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/**
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* Returns a query that sets the transaction isolation level.
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*
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* @param {string} value The isolation level.
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* @param {Object} options An object with options.
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* @returns {string} The generated sql query.
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* @private
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*/
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setIsolationLevelQuery(value, options) {
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if (options.parent) {
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return;
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}
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return `SET TRANSACTION ISOLATION LEVEL ${value};`;
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},
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generateTransactionId() {
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return uuidv4();
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},
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/**
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* Returns a query that starts a transaction.
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*
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* @param {Transaction} transaction
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* @returns {string} The generated sql query.
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* @private
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*/
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startTransactionQuery(transaction) {
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if (transaction.parent) {
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// force quoting of savepoint identifiers for postgres
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return `SAVEPOINT ${this.quoteIdentifier(transaction.name, true)};`;
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}
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return 'START TRANSACTION;';
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},
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deferConstraintsQuery() {},
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setConstraintQuery() {},
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setDeferredQuery() {},
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setImmediateQuery() {},
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/**
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* Returns a query that commits a transaction.
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*
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* @param {Transaction} transaction An object with options.
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* @returns {string} The generated sql query.
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* @private
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*/
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commitTransactionQuery(transaction) {
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if (transaction.parent) {
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return;
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}
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return 'COMMIT;';
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},
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/**
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* Returns a query that rollbacks a transaction.
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*
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* @param {Transaction} transaction
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* @returns {string} The generated sql query.
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* @private
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*/
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rollbackTransactionQuery(transaction) {
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if (transaction.parent) {
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// force quoting of savepoint identifiers for postgres
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return `ROLLBACK TO SAVEPOINT ${this.quoteIdentifier(transaction.name, true)};`;
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}
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return 'ROLLBACK;';
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}
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};
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module.exports = TransactionQueries;
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