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refactor: use TypeInfo getPGArrayType instead of munging type name (#913


The purpose of the getPGArrayType method is to get the array type for
a given element type. Let the TypeInfo implementation figure out how
to do that rather than appending "[]" to the element type name in
PgPreparedStatement setArray.
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grzm authored and vlsi committed Nov 12, 2017
1 parent 0c3a2fc commit 634e157e4cdbc2f78f1a90ac4d9f538f39caf4f9
@@ -1096,10 +1096,8 @@ public void setArray(int i, java.sql.Array x) throws SQLException {
// literal from Array.toString(), such as the implementation we return
// from ResultSet.getArray(). Eventually we need a proper implementation
// here that works for any Array implementation.

// Add special suffix for array identification
String typename = x.getBaseTypeName() + "[]";
int oid = connection.getTypeInfo().getPGType(typename);
String typename = x.getBaseTypeName();
int oid = connection.getTypeInfo().getPGArrayType(typename);
if (oid == Oid.UNSPECIFIED) {
throw new PSQLException("Unknown type {0}.", typename),
@@ -0,0 +1,97 @@
* Copyright (c) 2017, PostgreSQL Global Development Group
* See the LICENSE file in the project root for more information.

package org.postgresql.benchmark.statement;

import org.postgresql.benchmark.profilers.FlightRecorderProfiler;
import org.postgresql.util.ConnectionUtil;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.profile.GCProfiler;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.sql.Array;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;
import java.util.Properties;
import java.util.concurrent.TimeUnit;

@Fork(value = 1, jvmArgsPrepend = "-Xmx128m")
@Measurement(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS)
@Warmup(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS)
public class BindArray {
private Connection connection;
private PreparedStatement ps;

Integer[] ints;

@Param({"1", "5", "10", "50", "100", "1000"})
int arraySize;

public void setUp() throws SQLException {
Properties props = ConnectionUtil.getProperties();

connection = DriverManager.getConnection(ConnectionUtil.getURL(), props);
ps = connection.prepareStatement("SELECT ?");
ints = new Integer[arraySize];
for (int i = 0; i < arraySize; i++) {
ints[i] = i + 1;

public void tearDown() throws SQLException {

public Statement setObject() throws SQLException {
Array sqlInts = connection.createArrayOf("int", ints);
ps.setObject(1, sqlInts, Types.ARRAY);
return ps;

public Statement setArray() throws SQLException {
Array sqlInts = connection.createArrayOf("int", ints);
ps.setArray(1, sqlInts);
return ps;

public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()

new Runner(opt).run();

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