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| 1 | +// Copyright (c) 2022 Micro Focus or one of its affiliates. |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +const {Pool, Client} = require('vertica-nodejs') |
| 16 | + |
| 17 | +/** |
| 18 | + * Connection Examples |
| 19 | + **/ |
| 20 | + |
| 21 | +function connection() { |
| 22 | + const client = new Client() |
| 23 | + |
| 24 | + client.connect() |
| 25 | + client.query("SELECT 'success' as connection", (err, res) => { |
| 26 | + console.log(err || res.rows[0]) |
| 27 | + client.end() |
| 28 | + }) |
| 29 | +} |
| 30 | + |
| 31 | +function connectionPool() { |
| 32 | + const pool = new Pool() |
| 33 | + |
| 34 | + pool.query("SELECT 'success' as connectionPool", (err, res) => { |
| 35 | + console.log(err || res.rows[0]) |
| 36 | + pool.end() |
| 37 | + }) |
| 38 | +} |
| 39 | + |
| 40 | +async function asyncConnection() { |
| 41 | + const client = new Client() |
| 42 | + |
| 43 | + await client.connect() |
| 44 | + const res = await client.query("SELECT 'success' as asyncConnection") |
| 45 | + console.log(res.rows[0]) |
| 46 | + await client.end() |
| 47 | +} |
| 48 | + |
| 49 | +async function asyncConnectionPool() { |
| 50 | + const pool = new Pool() |
| 51 | + |
| 52 | + const res = await pool.query("SELECT 'success' as asyncConnectionPool") |
| 53 | + console.log(res.rows[0]) |
| 54 | + await pool.end() |
| 55 | +} |
| 56 | + |
| 57 | +function connectionWithConfig() { |
| 58 | + const client = new Client({ |
| 59 | + user: process.env['V_USER'], |
| 60 | + host: process.env['V_HOST'], |
| 61 | + database: process.env['V_DATABASE'], |
| 62 | + password: process.env['V_PASSWORD'], |
| 63 | + port: process.env['V_PORT'], |
| 64 | + }) |
| 65 | + |
| 66 | + client.connect() |
| 67 | + client.query("SELECT 'success' as connectionWithConfig", (err, res) => { |
| 68 | + console.log(err || res.rows[0]) |
| 69 | + client.end() |
| 70 | + }) |
| 71 | +} |
| 72 | + |
| 73 | +function connectionPoolWithConfig() { |
| 74 | + const pool = new Pool({ |
| 75 | + user: process.env['V_USER'], |
| 76 | + host: process.env['V_HOST'], |
| 77 | + database: process.env['V_DATABASE'], |
| 78 | + password: process.env['V_PASSWORD'], |
| 79 | + port: process.env['V_PORT'], |
| 80 | + }) |
| 81 | + |
| 82 | + pool.query("SELECT 'success' as connectionPoolWithConfig", (err, res) => { |
| 83 | + console.log(err || res.rows[0]) |
| 84 | + pool.end() |
| 85 | + }) |
| 86 | +} |
| 87 | + |
| 88 | +function connectionWithString() { |
| 89 | + const connectionString = 'vertica://' |
| 90 | + + process.env['V_USER'] + ':' |
| 91 | + + process.env['V_PASSWORD'] + '@' |
| 92 | + + process.env['V_HOST'] + ':' |
| 93 | + + process.env['V_PORT'] + '/' |
| 94 | + + process.env['V_DATABASE'] |
| 95 | + const client = new Client({ |
| 96 | + connectionString, |
| 97 | + }) |
| 98 | + client.connect() |
| 99 | + client.query("SELECT 'success' as connectionWithString", (err, res) => { |
| 100 | + console.log(err || res.rows[0]) |
| 101 | + client.end() |
| 102 | + }) |
| 103 | +} |
| 104 | + |
| 105 | +function connectionPoolWithString() { |
| 106 | + const connectionString = 'vertica://' |
| 107 | + + process.env['V_USER'] + ':' |
| 108 | + + process.env['V_PASSWORD'] + '@' |
| 109 | + + process.env['V_HOST'] + ':' |
| 110 | + + process.env['V_PORT'] + '/' |
| 111 | + + process.env['V_DATABASE'] |
| 112 | + const pool = new Pool({ |
| 113 | + connectionString, |
| 114 | + }) |
| 115 | + pool.query("SELECT 'success' as connectionPoolWithString", (err, res) => { |
| 116 | + console.log(err || res.rows[0]) |
| 117 | + pool.end() |
| 118 | + }) |
| 119 | +} |
| 120 | + |
| 121 | +connection() |
| 122 | +connectionPool() |
| 123 | +asyncConnection() |
| 124 | +asyncConnectionPool() |
| 125 | +connectionWithConfig() |
| 126 | +connectionPoolWithConfig() |
| 127 | +connectionWithString() |
| 128 | +connectionPoolWithString() |
| 129 | + |
| 130 | +/** |
| 131 | + * Query and Results Examples |
| 132 | + **/ |
| 133 | + |
| 134 | +function simpleQuery(){ |
| 135 | + const client = new Client() |
| 136 | + |
| 137 | + client.connect() |
| 138 | + client.query("CREATE LOCAL TEMP TABLE users(id int, name varchar)", (err, res) => { |
| 139 | + if (err) console.log(err) |
| 140 | + client.query("INSERT INTO users VALUES (1, 'John')", (err, res) => { |
| 141 | + if (err) console.log(err) |
| 142 | + client.query("SELECT * FROM users", (err, res) => { |
| 143 | + console.log(err || res.rows) |
| 144 | + client.end() |
| 145 | + }) |
| 146 | + }) |
| 147 | + }) |
| 148 | +} |
| 149 | + |
| 150 | +function parameterizedQuery() { |
| 151 | + const client = new Client() |
| 152 | + |
| 153 | + client.connect() |
| 154 | + client.query("CREATE LOCAL TEMP TABLE users(id int, name varchar)") |
| 155 | + client.query("INSERT INTO users VALUES (1, 'John')") |
| 156 | + client.query("INSERT INTO users VALUES (2, 'Jane')") |
| 157 | + const queryString = "SELECT * FROM users where id > ?" |
| 158 | + const valueArray = [1] |
| 159 | + client.query(queryString, valueArray, (err, res) => { |
| 160 | + console.log(err || res.rows) |
| 161 | + client.end() |
| 162 | + }) |
| 163 | +} |
| 164 | + |
| 165 | +function preparedStatement() { |
| 166 | + const client = new Client() |
| 167 | + |
| 168 | + client.connect() |
| 169 | + client.query("CREATE LOCAL TEMP TABLE users(id int, name varchar)") |
| 170 | + client.query("INSERT INTO users VALUES (1, 'John')") |
| 171 | + client.query("INSERT INTO users VALUES (2, 'Jane')") |
| 172 | + const queryName = "selectById" |
| 173 | + const queryString = "SELECT * FROM users where id > ?" |
| 174 | + let valueArray = [0] |
| 175 | + client.query({name: queryName, text: queryString, values: valueArray}, (err, res) => { |
| 176 | + console.log(err || res.rows) |
| 177 | + valueArray = [1] |
| 178 | + // now we have prepared a named query to use instead of needing the query string |
| 179 | + client.query({name: queryName, values: valueArray}, (err, res) => { |
| 180 | + console.log(err || res.rows) |
| 181 | + client.end() |
| 182 | + }) |
| 183 | + }) |
| 184 | +} |
| 185 | + |
| 186 | +function arrayRowModeQuery() { |
| 187 | + const client = new Client() |
| 188 | + |
| 189 | + client.connect() |
| 190 | + client.query("CREATE LOCAL TEMP TABLE users(id int, name varchar)") |
| 191 | + client.query("INSERT INTO users VALUES (1, 'John')") |
| 192 | + client.query("INSERT INTO users VALUES (2, 'Jane')") |
| 193 | + client.query({text: "SElECT * FROM users", rowMode: 'array'}, (err, res) => { |
| 194 | + console.log(err || res.rows) // [ [1, 'John'], [2, 'Jane'] ] |
| 195 | + client.end() |
| 196 | + }) |
| 197 | +} |
| 198 | + |
| 199 | +function customTypeParser() { |
| 200 | + const client = new Client() |
| 201 | + |
| 202 | + client.connect() |
| 203 | + client.query("CREATE LOCAL TEMP TABLE users(id int, name varchar)") |
| 204 | + client.query("INSERT INTO users VALUES (1, 'John')") |
| 205 | + client.query("INSERT INTO users VALUES (2, 'Jane')") |
| 206 | + const query = { |
| 207 | + // integer and varchar columns returned |
| 208 | + text: "SELECT * FROM USERS", |
| 209 | + // leave values untouched from server when parsing, result is all strings instead of integer and string |
| 210 | + types: { |
| 211 | + getTypeParser: () => val => val, |
| 212 | + }, |
| 213 | + } |
| 214 | + client.query(query, (err, res) => { |
| 215 | + console.log(err || res.rows) |
| 216 | + client.end() |
| 217 | + }) |
| 218 | +} |
| 219 | + |
| 220 | +simpleQuery() |
| 221 | +parameterizedQuery() |
| 222 | +preparedStatement() |
| 223 | +arrayRowModeQuery() |
| 224 | +customTypeParser() |
| 225 | + |
| 226 | +/** |
| 227 | + * TLS and other connection Properties Examples |
| 228 | + */ |
| 229 | + |
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