277 lines
7.7 KiB
JavaScript
277 lines
7.7 KiB
JavaScript
/* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. */
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/******************************************************************************
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*
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* You may not use the identified files except in compliance with the Apache
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* License, Version 2.0 (the "License.")
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*
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* The node-oracledb test suite uses 'mocha', 'should' and 'async'.
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* See LICENSE.md for relevant licenses.
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*
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* NAME
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* 157. maxRows.js
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*
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* DESCRIPTION
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* Test the "maxRows" property.
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*
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* NUMBERING RULE
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* Test numbers follow this numbering rule:
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* 1 - 20 are reserved for basic functional tests
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* 21 - 50 are reserved for data type supporting tests
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* 51 onwards are for other tests
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*
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*****************************************************************************/
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'use strict';
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var oracledb = require('oracledb');
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var should = require('should');
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var async = require('async');
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var dbConfig = require('./dbconfig.js');
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describe('157. maxRows.js', function() {
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var connection = null;
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var totalAmount = 107;
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before(function(done) {
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async.series([
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function getConn(cb) {
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oracledb.getConnection(dbConfig, function(err, conn) {
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should.not.exist(err);
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connection = conn;
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cb();
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});
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},
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function createTab(cb) {
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var proc = "BEGIN \n" +
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" DECLARE \n" +
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" e_table_missing EXCEPTION; \n" +
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" PRAGMA EXCEPTION_INIT(e_table_missing, -00942); \n" +
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" BEGIN \n" +
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" EXECUTE IMMEDIATE('DROP TABLE nodb_tab_conn_emp2 PURGE'); \n" +
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" EXCEPTION \n" +
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" WHEN e_table_missing \n" +
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" THEN NULL; \n" +
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" END; \n" +
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" EXECUTE IMMEDIATE (' \n" +
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" CREATE TABLE nodb_tab_conn_emp2 ( \n" +
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" id NUMBER NOT NULL, \n" +
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" name VARCHAR2(20) \n" +
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" ) \n" +
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" '); \n" +
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"END; ";
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connection.execute(
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proc,
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function(err) {
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should.not.exist(err);
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cb();
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}
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);
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},
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function insertData(cb) {
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var proc = "DECLARE \n" +
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" x NUMBER := 0; \n" +
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" n VARCHAR2(20); \n" +
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"BEGIN \n" +
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" FOR i IN 1..107 LOOP \n" +
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" x := x + 1; \n" +
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" n := 'staff ' || x; \n" +
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" INSERT INTO nodb_tab_conn_emp2 VALUES (x, n); \n" +
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" END LOOP; \n" +
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"END; ";
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connection.execute(
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proc,
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function(err) {
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should.not.exist(err);
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cb();
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}
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);
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}
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], done);
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}); // before()
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after(function(done) {
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async.series([
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function(cb) {
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connection.execute(
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"DROP TABLE nodb_tab_conn_emp2 PURGE",
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function(err) {
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should.not.exist(err);
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cb();
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}
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);
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},
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function(cb) {
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connection.close(function(err) {
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should.not.exist(err);
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cb();
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});
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}
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], done);
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}); // after()
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// restore oracledb.maxRows to its default value
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afterEach(function(done) {
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var defaultValue = 0;
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oracledb.maxRows = defaultValue;
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done();
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});
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var verifyRows = function(rows, amount) {
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for (var i = 0; i < amount; i++) {
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should.strictEqual(rows[i][0], (i + 1));
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should.strictEqual(rows[i][1], ("staff " + String(i + 1)) );
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}
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};
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var sqlQuery = "SELECT * FROM nodb_tab_conn_emp2 ORDER BY id";
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it('157.1 Default maxRows == 0, which means unlimited', function(done){
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should.strictEqual(oracledb.maxRows, 0);
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connection.execute(
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sqlQuery,
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function(err, result){
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should.not.exist(err);
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should.exist(result);
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should.strictEqual(result.rows.length, totalAmount);
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verifyRows(result.rows, totalAmount);
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done();
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}
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);
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});
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it("157.2 specify the value at execution", function(done){
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var fetchAmount = 25;
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connection.execute(
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sqlQuery,
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{},
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{ maxRows: fetchAmount },
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function(err, result){
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should.not.exist(err);
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should.exist(result);
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should.strictEqual(result.rows.length, fetchAmount);
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verifyRows(result.rows, fetchAmount);
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done();
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}
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);
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});
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it('157.3 equals to the total amount of rows', function(done){
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connection.execute(
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sqlQuery,
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{},
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{ maxRows: totalAmount },
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function(err, result){
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should.not.exist(err);
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should.exist(result);
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should.strictEqual(result.rows.length, totalAmount);
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verifyRows(result.rows, totalAmount);
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done();
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}
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);
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});
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it('157.4 cannot set it to be a negative number', function(done){
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connection.execute(
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sqlQuery,
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{},
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{ maxRows: -5 },
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function(err, result){
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should.exist(err);
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should.not.exist(result);
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should.strictEqual(
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err.message,
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'NJS-007: invalid value for "maxRows" in parameter 3'
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);
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done();
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}
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);
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});
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it('157.5 sets it to be large value', function(done) {
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connection.execute(
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sqlQuery,
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{},
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{ maxRows: 500000 },
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function(err, result){
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should.not.exist(err);
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should.exist(result);
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verifyRows(result.rows, totalAmount);
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done();
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}
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);
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});
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it('157.6 shows 12c new way to limit the number of records fetched by queries', function(done) {
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var myoffset = 2; // number of rows to skip
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var mymaxnumrows = 6; // number of rows to fetch
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var sql = "SELECT * FROM nodb_tab_conn_emp2 ORDER BY id";
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if (connection.oracleServerVersion >= 1201000000) {
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// 12c row-limiting syntax
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sql += " OFFSET :offset ROWS FETCH NEXT :maxnumrows ROWS ONLY";
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} else {
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// Pre-12c syntax [could also customize the original query and use row_number()]
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sql = "SELECT * FROM (SELECT A.*, ROWNUM AS MY_RNUM FROM"
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+ "(" + sql + ") A "
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+ "WHERE ROWNUM <= :maxnumrows + :offset) WHERE MY_RNUM > :offset";
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}
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connection.execute(
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sql,
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{ offset: myoffset, maxnumrows: mymaxnumrows },
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{ maxRows: 150 },
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function(err, result) {
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should.not.exist(err);
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(result.rows.length).should.eql(mymaxnumrows);
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done();
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}
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);
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}); // 157.6
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it('157.7 oracledb.maxRows > 0 && oracledb.maxRows < totalAmount', function(done) {
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var testValue = 100;
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oracledb.maxRows = testValue;
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connection.execute(
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sqlQuery,
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function(err, result) {
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should.not.exist(err);
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var expectedAmount = testValue;
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verifyRows(result.rows, expectedAmount);
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done();
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}
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);
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}); // 157.7
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it('157.8 oracledb.maxRows > 0, execute() with maxRows=0', function(done) {
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oracledb.maxRows = 100;
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connection.execute(
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sqlQuery,
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{},
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{ maxRows: 0 },
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function(err, result) {
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should.not.exist(err);
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var expectedAmount = totalAmount;
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verifyRows(result.rows, expectedAmount);
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done();
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}
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);
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}); // 157.8
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}); |