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HSQLDB - Lightweight 100% Java SQL Database Engine
/* Copyright (c) 2001-2021, The HSQL Development Group
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package org.hsqldb.test;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.Timestamp;
import junit.framework.TestCase;
/**
* @author kloska@users
* @author fredt@users
*/
public class TestPreparedSubQueries extends TestCase {
private Connection con = null;
private static class sqlStmt {
boolean prepare;
boolean update;
String command;
sqlStmt(String c, boolean p, boolean u) {
prepare = p;
command = c;
update = u;
}
}
;
private sqlStmt[] stmtArray = {
new sqlStmt("drop table a if exists cascade", false, false),
new sqlStmt("create cached table a (a int identity,b int)", false,
false),
new sqlStmt("create index bIdx on a(b)", false, false),
new sqlStmt("insert into a(b) values(1)", true, true),
new sqlStmt("insert into a(b) values(2)", true, true),
new sqlStmt("insert into a(b) values(3)", true, true),
new sqlStmt("insert into a(b) values(4)", true, true),
new sqlStmt("insert into a(b) values(5)", true, true),
new sqlStmt("insert into a(b) values(6)", true, true),
new sqlStmt(
"update a set b=100 where b>(select b from a X where X.a=2)",
true, true),
new sqlStmt("update a set b=200 where b>(select b from a where a=?)",
true, true),
new sqlStmt(
"update a set b=300 where b>(select b from a X where X.a=?)",
true, true)
};
private Object[][] stmtArgs = {
{}, {}, {}, {}, {}, {}, {}, {}, {}, {}, { Integer.valueOf(2) },
{ Integer.valueOf(2) }
};
public TestPreparedSubQueries(String name) {
super(name);
}
protected void setUp() {
String url = "jdbc:hsqldb:testdb/test";
try {
Class.forName("org.hsqldb.jdbc.JDBCDriver");
con = java.sql.DriverManager.getConnection(url, "sa", "");
} catch (Exception e) {
e.printStackTrace();
}
}
public void testA() {
try {
int i = 0;
for (i = 0; i < stmtArray.length; i++) {
int j;
System.out.println(" -- #" + i + " ----------------------- ");
if (stmtArray[i].prepare) {
PreparedStatement ps = null;
System.out.println(" -- preparing\n<<<\n"
+ stmtArray[i].command + "\n>>>\n");
ps = con.prepareStatement(stmtArray[i].command);
System.out.print(" -- setting " + stmtArgs[i].length
+ " Args [");
for (j = 0; j < stmtArgs[i].length; j++) {
System.out.print((j > 0 ? "; "
: "") + stmtArgs[i][j]);
ps.setObject(j + 1, stmtArgs[i][j]);
}
System.out.println("]");
System.out.println(" -- executing ");
if (stmtArray[i].update) {
int r = ps.executeUpdate();
System.out.println(" ***** ps.executeUpdate gave me "
+ r);
} else {
boolean b = ps.execute();
System.out.print(" ***** ps.execute gave me " + b);
}
} else {
System.out.println(" -- executing directly\n<<<\n"
+ stmtArray[i].command + "\n>>>\n");
Statement s = con.createStatement();
boolean b = s.execute(stmtArray[i].command);
System.out.println(" ***** st.execute gave me " + b);
}
}
} catch (Exception e) {
System.out.println(" ?? Caught Exception " + e);
assertTrue(false);
}
assertTrue(true);
}
public void testGenerated() {
boolean valid = false;
try {
Statement s = con.createStatement();
s.execute("drop table a if exists");
s.execute("create cached table a (a int identity,b int)");
s.execute("insert into a(b) values(1)",
Statement.RETURN_GENERATED_KEYS);
ResultSet r = s.getGeneratedKeys();
while (r.next()) {
r.getInt(1);
valid = true;
}
r.close();
assertTrue(valid);
s.execute("insert into a(b) values(2)", new int[]{ 1 });
r = s.getGeneratedKeys();
while (r.next()) {
r.getInt(1);
valid = true;
}
assertTrue(valid);
s.execute("insert into a(b) values(2)", new String[]{ "A" });
r = s.getGeneratedKeys();
while (r.next()) {
r.getInt(1);
valid = true;
}
assertTrue(valid);
s.execute("drop table a if exists");
s.execute("create cached table a (g int generated always as (a + b), a int generated always as identity (start with 5), b int, c timestamp default current_timestamp)");
s.execute("insert into a(b) values(1)",
Statement.RETURN_GENERATED_KEYS);
r = s.getGeneratedKeys();
while (r.next()) {
int v = r.getInt(2);
valid = true;
assertEquals(v, 5);
}
r.close();
assertTrue(valid);
s.execute("insert into a(b) values(2)", new int[]{ 1 });
r = s.getGeneratedKeys();
while (r.next()) {
int v = r.getInt(1);
valid = true;
assertEquals(v, 8);
}
assertTrue(valid);
s.execute("insert into a(b) values(2)", new String[]{ "A", "G", "C" });
r = s.getGeneratedKeys();
while (r.next()) {
Timestamp tv = r.getTimestamp(3);
int iv = r.getInt(1);
valid = true;
assertEquals(iv, 7);
long diff = System.currentTimeMillis() - tv.getTime();
if (diff > 100 || diff <0) {
fail("timestamp not correct");
}
}
assertTrue(valid);
} catch (Exception e) {
assertTrue(false);
}
}
public void testIdentity() {
boolean valid = false;
try {
Statement s = con.createStatement();
s.execute("drop table a if exists");
s.execute("create cached table a (a int identity, b int)");
PreparedStatement p1 =
con.prepareStatement("insert into a(b) values ?");
p1.setInt(1, 10);
p1.executeUpdate();
PreparedStatement p2 = con.prepareStatement("call identity()");
ResultSet r = p2.executeQuery();
while (r.next()) {
r.getInt(1);
valid = true;
}
p1.setInt(1, 11);
p1.executeUpdate();
PreparedStatement ps3 = con.prepareStatement(
"select count(*) from a where a in ((select a from a where b = ?) union (select ? from a))");
ps3.setInt(1, 10);
ps3.setInt(2, 1);
r = ps3.executeQuery();
while (r.next()) {
int value = r.getInt(1);
valid = value == 2;
}
assertTrue(valid);
} catch (Exception e) {
assertTrue(false);
}
}
}