61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
// PostgreSQL Native Driver (pg-native)
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// -------
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const Client_PG = require('../postgres');
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class Client_PgNative extends Client_PG {
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constructor(...args) {
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super(...args);
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this.driverName = 'pgnative';
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this.canCancelQuery = true;
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}
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_driver() {
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return require('pg').native;
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}
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_stream(connection, obj, stream, options) {
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if (!obj.sql) throw new Error('The query is empty');
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const client = this;
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return new Promise((resolver, rejecter) => {
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stream.on('error', rejecter);
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stream.on('end', resolver);
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return client
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._query(connection, obj)
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.then((obj) => obj.response)
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.then(({ rows }) => rows.forEach((row) => stream.write(row)))
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.catch(function (err) {
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stream.emit('error', err);
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})
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.then(function () {
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stream.end();
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});
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});
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}
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async cancelQuery(connectionToKill) {
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try {
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return await this._wrappedCancelQueryCall(null, connectionToKill);
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} catch (err) {
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this.logger.warn(`Connection Error: ${err}`);
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throw err;
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}
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}
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_wrappedCancelQueryCall(emptyConnection, connectionToKill) {
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return new Promise(function (resolve, reject) {
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connectionToKill.native.cancel(function (err) {
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if (err) {
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reject(err);
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return;
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}
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resolve(true);
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});
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});
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}
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}
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module.exports = Client_PgNative;
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