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Regression test and documentation for issue #199.
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pljava-examples/src/main/java/org/postgresql/pljava/example/annotation/PreJSR310.java
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/* | ||
* Copyright (c) 2018- Tada AB and other contributors, as listed below. | ||
* | ||
* All rights reserved. This program and the accompanying materials | ||
* are made available under the terms of the The BSD 3-Clause License | ||
* which accompanies this distribution, and is available at | ||
* http://opensource.org/licenses/BSD-3-Clause | ||
* | ||
* Contributors: | ||
* Chapman Flack | ||
*/ | ||
package org.postgresql.pljava.example.annotation; | ||
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import java.sql.Connection; | ||
import java.sql.Date; | ||
import java.sql.DriverManager; | ||
import java.sql.Statement; | ||
import java.sql.ResultSet; | ||
import java.sql.Savepoint; | ||
import java.sql.SQLException; | ||
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import static java.util.logging.Logger.getAnonymousLogger; | ||
import java.util.TimeZone; | ||
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import org.postgresql.pljava.annotation.Function; | ||
import org.postgresql.pljava.annotation.SQLAction; | ||
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/** | ||
* Some tests of pre-JSR 310 date/time/timestamp conversions. | ||
*<p> | ||
* For now, just {@code java.sql.Date}, thanks to issue #199. | ||
*<p> | ||
* This example relies on {@code implementor} tags reflecting the PostgreSQL | ||
* version, set up in the {@link ConditionalDDR} example. | ||
*/ | ||
@SQLAction(implementor="postgresql_ge_90300", // needs LATERAL | ||
requires="issue199", install={ | ||
"SELECT javatest.issue199()" | ||
}) | ||
public class PreJSR310 | ||
{ | ||
private static final String TZPRAGUE = "Europe/Prague"; | ||
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/** | ||
* Test for a regression in PG date to/from java.sql.Date conversion | ||
* identified in issue #199. | ||
*<p> | ||
* Checks that two months of consecutive dates in October/November 2018 | ||
* are converted correctly in the Europe/Prague timezone. The actual issue | ||
* was by no means limited to that timezone, but this test reproducibly | ||
* detects it. | ||
*/ | ||
@Function(schema="javatest", provides="issue199") | ||
public static void issue199() throws SQLException | ||
{ | ||
TimeZone oldZone = TimeZone.getDefault(); | ||
TimeZone tzPrague = TimeZone.getTimeZone(TZPRAGUE); | ||
Connection c = DriverManager.getConnection("jdbc:default:connection"); | ||
Statement s = c.createStatement(); | ||
Savepoint svpt = c.setSavepoint(); | ||
boolean ok = true; | ||
try | ||
{ | ||
TimeZone.setDefault(tzPrague); | ||
s.execute("SET LOCAL TIME ZONE '" + TZPRAGUE + "'"); | ||
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ResultSet rs = s.executeQuery( | ||
"SELECT" + | ||
" d, to_char(d, 'YYYY-MM-DD')" + | ||
" FROM" + | ||
" generate_series(0, 60) AS s(i)," + | ||
" LATERAL (SELECT date '2018-10-01' + i) AS t(d)"); | ||
while ( rs.next() ) | ||
{ | ||
Date dd = rs.getDate(1); | ||
String ds = rs.getString(2); | ||
if ( ! ds.equals(dd.toString()) ) | ||
ok = false; | ||
} | ||
} | ||
finally | ||
{ | ||
TimeZone.setDefault(oldZone); | ||
c.rollback(svpt); // restore prior PG timezone | ||
s.close(); | ||
c.close(); | ||
} | ||
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if ( ok ) | ||
getAnonymousLogger().info("issue 199 test ok"); | ||
else | ||
getAnonymousLogger().warning("issue 199 test not ok"); | ||
} | ||
} |
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