node-oracledb/test/fetchClobAsString3.js

384 lines
12 KiB
JavaScript

/* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. */
/******************************************************************************
*
* You may not use the identified files except in compliance with the Apache
* License, Version 2.0 (the "License.")
*
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
* See the License for the specific language governing permissions and
* limitations under the License.
*
* The node-oracledb test suite uses 'mocha', 'should' and 'async'.
* See LICENSE.md for relevant licenses.
*
* NAME
* 86. fetchClobAsString.js
*
* DESCRIPTION
* Testing Oracle data type support - CLOB.
* To fetch CLOB columns as strings
* This could be very useful for smaller CLOB size as it can be fetched as string and processed in memory itself.
*
*****************************************************************************/
'use strict';
var oracledb = require('oracledb');
var async = require('async');
var should = require('should');
var dbConfig = require('./dbconfig.js');
var random = require('./random.js');
describe('86. fetchClobAsString3.js', function() {
var connection = null;
var insertID = 1; // assume id for insert into db starts from 1
var proc_create_table2 = "BEGIN \n" +
" DECLARE \n" +
" e_table_missing EXCEPTION; \n" +
" PRAGMA EXCEPTION_INIT(e_table_missing, -00942); \n" +
" BEGIN \n" +
" EXECUTE IMMEDIATE('DROP TABLE nodb_clob2 PURGE'); \n" +
" EXCEPTION \n" +
" WHEN e_table_missing \n" +
" THEN NULL; \n" +
" END; \n" +
" EXECUTE IMMEDIATE (' \n" +
" CREATE TABLE nodb_clob2 ( \n" +
" ID NUMBER, \n" +
" C1 CLOB, \n" +
" C2 CLOB \n" +
" ) \n" +
" '); \n" +
"END; ";
var drop_table2 = "DROP TABLE nodb_clob2 PURGE";
var defaultStmtCache = oracledb.stmtCacheSize;
before('get one connection', function(done) {
oracledb.stmtCacheSize = 0;
oracledb.getConnection(dbConfig, function(err, conn) {
should.not.exist(err);
connection = conn;
done();
});
}); // before
after('release connection', function(done) {
oracledb.stmtCacheSize = defaultStmtCache;
connection.release(function(err) {
should.not.exist(err);
done();
});
}); // after
var insertIntoClobTable2 = function(id, content1, content2, callback) {
connection.execute(
"INSERT INTO nodb_clob2 VALUES (:ID, :C1, :C2)",
[ id, content1, content2 ],
function(err, result){
should.not.exist(err);
should.strictEqual(result.rowsAffected, 1);
callback();
}
);
};
describe('86.1 fetch multiple CLOBs and result set', function() {
before('create Table and populate', function(done) {
connection.execute(
proc_create_table2,
function(err){
should.not.exist(err);
done() ;
}
);
}); // before
after('drop table', function(done) {
oracledb.fetchAsString = [];
connection.execute(
drop_table2,
function(err){
should.not.exist(err);
done();
}
);
}); // after
beforeEach('set oracledb.fetchAsString', function(done) {
oracledb.fetchAsString = [ oracledb.CLOB ];
done();
}); // beforeEach
afterEach('clear the By type specification', function(done) {
oracledb.fetchAsString = [];
done();
}); // afterEach
it('86.1.1 fetch multiple CLOB columns as String', function(done) {
var id = insertID++;
var specialStr_1 = '86.1.1_1';
var contentLength_1 = 26;
var content_1 = random.getRandomString(contentLength_1, specialStr_1);
var specialStr_2 = '86.1.1_2';
var contentLength_2 = 100;
var content_2 = random.getRandomString(contentLength_2, specialStr_2);
async.series([
function(cb) {
insertIntoClobTable2(id, content_1, content_2, cb);
},
function(cb) {
connection.execute(
"SELECT ID, C1, C2 from nodb_clob2",
function(err, result){
should.not.exist(err);
var specialStrLen_1 = specialStr_1.length;
var resultLen_1 = result.rows[0][1].length;
should.equal(result.rows[0][1].length, contentLength_1);
should.strictEqual(result.rows[0][1].substring(0, specialStrLen_1), specialStr_1);
should.strictEqual(result.rows[0][1].substring(resultLen_1 - specialStrLen_1, resultLen_1), specialStr_1);
var specialStrLen_2 = specialStr_2.length;
var resultLen_2 = result.rows[0][2].length;
should.equal(result.rows[0][2].length, contentLength_2);
should.strictEqual(result.rows[0][2].substring(0, specialStrLen_2), specialStr_2);
should.strictEqual(result.rows[0][2].substring(resultLen_2 - specialStrLen_2, resultLen_2), specialStr_2);
cb();
}
);
}
], done);
}); // 86.1.1
it('86.1.2 fetch two CLOB columns, one as string, another streamed', function(done) {
var id = insertID++;
var specialStr_1 = '86.1.2_1';
var contentLength_1 = 30;
var content_1 = random.getRandomString(contentLength_1, specialStr_1);
var specialStr_2 = '86.1.2_2';
var contentLength_2 = 50;
var content_2 = random.getRandomString(contentLength_2, specialStr_2);
async.series([
function(cb) {
insertIntoClobTable2(id, content_1, content_2, cb);
},
function(cb) {
connection.execute(
"SELECT ID, C1 from nodb_clob2 where ID = :id",
{ id: id },
function(err, result){
should.not.exist(err);
var specialStrLen_1 = specialStr_1.length;
var resultLen_1 = result.rows[0][1].length;
should.equal(result.rows[0][1].length, contentLength_1);
should.strictEqual(result.rows[0][1].substring(0, specialStrLen_1), specialStr_1);
should.strictEqual(result.rows[0][1].substring(resultLen_1 - specialStrLen_1, resultLen_1), specialStr_1);
cb();
}
);
},
function(cb) {
oracledb.fetchAsString = [];
connection.execute(
"SELECT C2 from nodb_clob2 where ID = :id",
{ id: id },
function(err, result){
should.not.exist(err);
(result.rows.length).should.not.eql(0);
var lob = result.rows[0][0];
should.exist(lob);
// set the encoding so we get a 'string' not a 'String'
lob.setEncoding('utf8');
var clobData = '';
lob.on('data', function(chunk) {
clobData += chunk;
});
lob.on('error', function(err) {
should.not.exist(err, "lob.on 'error' event.");
});
lob.on('end', function() {
should.not.exist(err);
var specialStrLen_2 = specialStr_2.length;
var resultLen_2 = clobData.length;
should.equal(clobData.length, contentLength_2);
should.strictEqual(clobData.substring(0, specialStrLen_2), specialStr_2);
should.strictEqual(clobData.substring(resultLen_2 - specialStrLen_2, resultLen_2), specialStr_2);
cb();
});
}
);
}
], done);
}); // 86.1.2
it('86.1.3 works with Restult Set', function(done) {
var id = insertID++;
var specialStr_1 = '86.1.3';
var contentLength_1 = 387;
var content_1 = random.getRandomString(contentLength_1, specialStr_1);
async.series([
function(cb) {
var sql = "insert into nodb_clob2(id, c1) values (:i, :c)";
connection.execute(
sql,
{
i: id,
c: content_1
},
function(err) {
should.not.exist(err);
cb();
}
);
},
function(cb) {
connection.execute(
"select c1 from nodb_clob2 where id = :1",
[id],
{ resultSet: true },
function(err, result) {
should.not.exist(err);
fetchOneRowFromRS(result.resultSet, cb);
}
);
}
], done);
var fetchOneRowFromRS = function(rs, callback) {
rs.getRow(
function(err, row) {
if (err) {
should.not.exist(err);
doClose(rs, callback);
} else if (!row) {
doClose(rs, callback);
} else {
var specialStrLen_1 = specialStr_1.length;
var resultLen_1 = row[0].length;
should.equal(row[0].length, contentLength_1);
should.strictEqual(
row[0].substring(0, specialStrLen_1),
specialStr_1
);
should.strictEqual(
row[0].substring(resultLen_1 - specialStrLen_1, resultLen_1),
specialStr_1
);
fetchOneRowFromRS(rs, callback);
}
}
);
};
var doClose = function(rs, callback) {
rs.close(function(err) {
should.not.exist(err);
callback();
});
};
}); // 86.1.3
}); // 86.1
describe('86.2 types support for fetchAsString property', function() {
afterEach ('clear the by-type specification', function ( done ) {
oracledb.fetchAsString = [];
done ();
});
it('86.2.1 String not supported in fetchAsString', function(done) {
should.throws(
function() {
oracledb.fetchAsString = [ oracledb.STRING ];
},
/NJS-021: invalid type for conversion specified/
);
done();
}); // 86.2.1
it('86.2.2 BLOB not supported in fetchAsString', function(done) {
should.throws(
function() {
oracledb.fetchAsString = [ oracledb.BLOB ];
},
/NJS-021: invalid type for conversion specified/
);
done();
}); // 86.2.2
it('86.2.3 Cursor not supported in fetchAsString', function(done) {
should.throws(
function() {
oracledb.fetchAsString = [ oracledb.CURSOR ];
},
/NJS-021: invalid type for conversion specified/
);
done();
}); // 86.2.3
it('86.2.4 Buffer not supported in fetchAsString', function(done) {
should.throws(
function() {
oracledb.fetchAsString = [ oracledb.Buffer ];
},
/NJS-021: invalid type for conversion specified/
);
done();
}); // 86.2.4
it('86.2.5 Number supported in fetchAsString', function(done) {
should.doesNotThrow(
function() {
oracledb.fetchAsString = [ oracledb.NUMBER ];
}
);
should.strictEqual(oracledb.fetchAsString.length, 1);
should.strictEqual(oracledb.fetchAsString[0], oracledb.NUMBER);
done();
}); // 86.2.5
it('86.2.6 Date supported in fetchAsString', function(done) {
should.doesNotThrow(
function() {
oracledb.fetchAsString = [ oracledb.DATE ];
}
);
should.strictEqual(oracledb.fetchAsString.length, 1);
should.strictEqual(oracledb.fetchAsString[0], oracledb.DATE);
done();
}); // 86.2.6
it('86.2.7 CLOB supported in fetchAsString', function(done) {
should.doesNotThrow(
function() {
oracledb.fetchAsString = [ oracledb.CLOB ];
}
);
should.strictEqual(oracledb.fetchAsString.length, 1);
should.strictEqual(oracledb.fetchAsString[0], oracledb.CLOB);
done();
}); // 86.2.7
}); // 86.2
});