forked from pgjdbc/pgjdbc
/
DatabaseMetaDataTest.java
248 lines (210 loc) · 9.09 KB
/
DatabaseMetaDataTest.java
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/*
* Copyright (c) 2007, PostgreSQL Global Development Group
* See the LICENSE file in the project root for more information.
*/
package org.postgresql.test.jdbc4;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import org.postgresql.core.ServerVersion;
import org.postgresql.test.TestUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class DatabaseMetaDataTest {
private Connection conn;
@Before
public void setUp() throws Exception {
conn = TestUtil.openDB();
TestUtil.dropSequence(conn, "sercoltest_a_seq");
TestUtil.createTable(conn, "sercoltest", "a serial, b int");
}
@After
public void tearDown() throws Exception {
TestUtil.dropSequence(conn, "sercoltest_a_seq");
TestUtil.dropTable(conn, "sercoltest");
TestUtil.closeDB(conn);
}
@Test
public void testGetClientInfoProperties() throws Exception {
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet rs = dbmd.getClientInfoProperties();
if (!TestUtil.haveMinimumServerVersion(conn, ServerVersion.v9_0)) {
assertTrue(!rs.next());
return;
}
assertTrue(rs.next());
assertEquals("ApplicationName", rs.getString("NAME"));
}
@Test
public void testGetColumnsForAutoIncrement() throws Exception {
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet rs = dbmd.getColumns("%", "%", "sercoltest", "%");
assertTrue(rs.next());
assertEquals("a", rs.getString("COLUMN_NAME"));
assertEquals("YES", rs.getString("IS_AUTOINCREMENT"));
assertTrue(rs.next());
assertEquals("b", rs.getString("COLUMN_NAME"));
assertEquals("NO", rs.getString("IS_AUTOINCREMENT"));
assertTrue(!rs.next());
}
@Test
public void testGetSchemas() throws SQLException {
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet rs = dbmd.getSchemas("", "publ%");
assertTrue(rs.next());
assertEquals("public", rs.getString("TABLE_SCHEM"));
assertNull(rs.getString("TABLE_CATALOG"));
assertTrue(!rs.next());
}
@Test
public void testGetFunctionsWithBlankPatterns() throws SQLException {
int minFuncCount = 1000;
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet rs = dbmd.getFunctions("", "", "");
int count = assertGetFunctionRS(rs);
assertThat(count > minFuncCount, is(true));
// Should be same as blank pattern
ResultSet rs2 = dbmd.getFunctions(null, null, null);
int count2 = assertGetFunctionRS(rs2);
assertThat(count2 > minFuncCount, is(true));
assertThat(count2, is(count));
// Catalog parameter has no affect on our getFunctions filtering
ResultSet rs3 = dbmd.getFunctions("ANYTHING_WILL_WORK", null, null);
int count3 = assertGetFunctionRS(rs3);
assertThat(count3 > minFuncCount, is(true));
assertThat(count3, is(count));
// Filter by schema
ResultSet rs4 = dbmd.getFunctions("", "pg_catalog", null);
int count4 = assertGetFunctionRS(rs4);
assertThat(count4 > minFuncCount, is(true));
// Filter by schema and function name
ResultSet rs5 = dbmd.getFunctions("", "pg_catalog", "abs");
int count5 = assertGetFunctionRS(rs5);
assertThat(count5 >= 1, is(true));
// Filter by function name only
rs5 = dbmd.getFunctions("", "", "abs");
count5 = assertGetFunctionRS(rs5);
assertThat(count5 >= 1, is(true));
rs.close();
rs2.close();
rs3.close();
rs4.close();
rs5.close();
}
/** Assert some basic result from ResultSet of a GetFunctions method. Return the total row count. */
private int assertGetFunctionRS(ResultSet rs) throws SQLException {
// There should be at least one row
assertThat(rs.next(), is(true));
assertThat(rs.getString("FUNCTION_CAT"), is(System.getProperty("database")));
assertThat(rs.getString("FUNCTION_SCHEM"), notNullValue());
assertThat(rs.getString("FUNCTION_NAME"), notNullValue());
assertThat(rs.getShort("FUNCTION_TYPE") >= 0, is(true));
assertThat(rs.getString("SPECIFIC_NAME"), notNullValue());
// Ensure there is enough column and column value retrieve by index should be same as column name (ordered)
assertThat(rs.getMetaData().getColumnCount(), is(6));
assertThat(rs.getString(1), is(rs.getString("FUNCTION_CAT")));
assertThat(rs.getString(2), is(rs.getString("FUNCTION_SCHEM")));
assertThat(rs.getString(3), is(rs.getString("FUNCTION_NAME")));
assertThat(rs.getString(4), is(rs.getString("REMARKS")));
assertThat(rs.getShort(5), is(rs.getShort("FUNCTION_TYPE")));
assertThat(rs.getString(6), is(rs.getString("SPECIFIC_NAME")));
// Get all result and assert they are ordered per javadoc spec:
// FUNCTION_CAT, FUNCTION_SCHEM, FUNCTION_NAME and SPECIFIC_NAME
List<String> result = new ArrayList<String>();
do {
result.add(rs.getString("FUNCTION_CAT")
+ " "
+ rs.getString("FUNCTION_SCHEM")
+ " "
+ rs.getString("FUNCTION_NAME")
+ " "
+ rs.getString("SPECIFIC_NAME"));
} while (rs.next());
List<String> orderedResult = new ArrayList<String>(result);
Collections.sort(orderedResult);
assertThat(result, is(orderedResult));
return result.size();
}
@Test
public void testGetFunctionsWithSpecificTypes() throws SQLException {
// These function creation are borrow from jdbc2/DatabaseMetaDataTest
// We modify to ensure new function created are returned by getFunctions()
DatabaseMetaData dbmd = conn.getMetaData();
if (TestUtil.haveMinimumServerVersion(conn, ServerVersion.v8_4)) {
Statement stmt = conn.createStatement();
stmt.execute(
"CREATE OR REPLACE FUNCTION getfunc_f1(int, varchar) RETURNS int AS 'SELECT 1;' LANGUAGE SQL");
ResultSet rs = dbmd.getFunctions("", "", "getfunc_f1");
assertThat(rs.next(), is(true));
assertThat(rs.getString("FUNCTION_NAME"), is("getfunc_f1"));
assertThat(rs.getShort("FUNCTION_TYPE"), is((short)DatabaseMetaData.functionNoTable));
assertThat(rs.next(), is(false));
rs.close();
stmt.execute("DROP FUNCTION getfunc_f1(int, varchar)");
stmt.execute(
"CREATE OR REPLACE FUNCTION getfunc_f3(IN a int, INOUT b varchar, OUT c timestamptz) AS $f$ BEGIN b := 'a'; c := now(); return; END; $f$ LANGUAGE plpgsql");
rs = dbmd.getFunctions("", "", "getfunc_f3");
assertThat(rs.next(), is(true));
assertThat(rs.getString("FUNCTION_NAME"), is("getfunc_f3"));
assertThat(rs.getShort("FUNCTION_TYPE"), is((short)DatabaseMetaData.functionNoTable));
assertThat(rs.next(), is(false));
rs.close();
stmt.execute("DROP FUNCTION getfunc_f3(int, varchar)");
// RETURNS TABLE requires PostgreSQL 8.4+
stmt.execute(
"CREATE OR REPLACE FUNCTION getfunc_f5() RETURNS TABLE (i int) LANGUAGE sql AS 'SELECT 1'");
rs = dbmd.getFunctions("", "", "getfunc_f5");
assertThat(rs.next(), is(true));
assertThat(rs.getString("FUNCTION_NAME"), is("getfunc_f5"));
assertThat(rs.getShort("FUNCTION_TYPE"), is((short)DatabaseMetaData.functionReturnsTable));
assertThat(rs.next(), is(false));
rs.close();
stmt.execute("DROP FUNCTION getfunc_f5()");
} else {
// For PG 8.3 or 8.2 it will resulted in unknown function type
Statement stmt = conn.createStatement();
stmt.execute(
"CREATE OR REPLACE FUNCTION getfunc_f1(int, varchar) RETURNS int AS 'SELECT 1;' LANGUAGE SQL");
ResultSet rs = dbmd.getFunctions("", "", "getfunc_f1");
assertThat(rs.next(), is(true));
assertThat(rs.getString("FUNCTION_NAME"), is("getfunc_f1"));
assertThat(rs.getShort("FUNCTION_TYPE"), is((short)DatabaseMetaData.functionResultUnknown));
assertThat(rs.next(), is(false));
rs.close();
stmt.execute("DROP FUNCTION getfunc_f1(int, varchar)");
stmt.execute(
"CREATE OR REPLACE FUNCTION getfunc_f3(IN a int, INOUT b varchar, OUT c timestamptz) AS $f$ BEGIN b := 'a'; c := now(); return; END; $f$ LANGUAGE plpgsql");
rs = dbmd.getFunctions("", "", "getfunc_f3");
assertThat(rs.next(), is(true));
assertThat(rs.getString("FUNCTION_NAME"), is("getfunc_f3"));
assertThat(rs.getShort("FUNCTION_TYPE"), is((short)DatabaseMetaData.functionResultUnknown));
assertThat(rs.next(), is(false));
rs.close();
stmt.execute("DROP FUNCTION getfunc_f3(int, varchar)");
}
}
@Test
public void testSortedDataTypes() throws SQLException {
// https://github.com/pgjdbc/pgjdbc/issues/716
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet rs = dbmd.getTypeInfo();
int lastType = Integer.MIN_VALUE;
while (rs.next()) {
int type = rs.getInt("DATA_TYPE");
assertTrue(lastType <= type);
lastType = type;
}
}
}