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annotate src/main/java/org/monetdb/jdbc/MonetDriver.java @ 973:32f246853ec4 default tip

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Optimisation, call connection.mapClobAsVarChar() and connection.mapBlobAsVarBinary() outside the for-loop, as it does not change.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 10 Apr 2025 19:26:59 +0200 (3 hours ago)
parents fd938d0a2b3a
children
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1 /*
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2 * SPDX-License-Identifier: MPL-2.0
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 *
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8 * Copyright 2024, 2025 MonetDB Foundation;
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9 * Copyright August 2008 - 2023 MonetDB B.V.;
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10 * Copyright 1997 - July 2008 CWI.
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11 */
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12
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13 package org.monetdb.jdbc;
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14
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15 import org.monetdb.mcl.net.Parameter;
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16 import org.monetdb.mcl.net.Target;
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17 import org.monetdb.mcl.net.ValidationError;
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18
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19 import java.net.URISyntaxException;
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20 import java.sql.Connection;
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21 import java.sql.Driver;
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22 import java.sql.DriverManager;
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23 import java.sql.DriverPropertyInfo;
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24 import java.sql.SQLException;
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25 import java.sql.SQLFeatureNotSupportedException;
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26 import java.sql.Types;
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27 import java.util.Map.Entry;
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28 import java.util.Properties;
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29
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30 /**
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31 *<pre>
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32 * A JDBC {@link Driver} suitable for the MonetDB RDBMS.
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33 *
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34 * This driver will be used by the DriverManager to determine if an URL
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35 * is to be handled by this driver, and if it does, then this driver
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36 * will supply a Connection suitable for MonetDB.
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37 *
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38 * This class has no explicit constructor, the default constructor
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39 * generated by the Java compiler will be sufficient since nothing has
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40 * to be set in order to use this driver.
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41 *
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42 * This Driver supports MonetDB database URLs. MonetDB URLs are defined as:
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43 * <code>jdbc:monetdb://&lt;host&gt;[:&lt;port&gt;]/&lt;database&gt;</code>
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44 * where [:&lt;port&gt;] denotes that a port is optional. If not
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45 * given, port 50000 will be used.
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46 *</pre>
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47 *
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48 * @author Fabian Groffen
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49 */
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50 public final class MonetDriver implements Driver {
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51 // the url kind will be jdbc:monetdb://<host>[:<port>]/<database>
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52 // Chapter 9.2.1 from Sun JDBC 3.0 specification
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53
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54 // initialize this class: register it at the DriverManager
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55 // Chapter 9.2 from Sun JDBC 3.0 specification
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56 static {
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57 try {
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58 DriverManager.registerDriver(new MonetDriver());
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59 } catch (SQLException e) {
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60 e.printStackTrace();
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61 }
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62 }
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63
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64 //== methods of interface Driver
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65
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66 /**
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67 * Retrieves whether the driver thinks that it can open a connection to the
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68 * given URL. Typically drivers will return true if they understand the
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69 * subprotocol specified in the URL and false if they do not.
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70 *
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71 * @param url the URL of the database
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72 * @return true if this driver understands the given URL; false otherwise
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73 */
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74 @Override
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75 public boolean acceptsURL(final String url) {
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76 if (url == null)
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77 return false;
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78 return url.startsWith("jdbc:monetdb:") || url.startsWith("jdbc:monetdbs:");
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79 }
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80
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81 /**
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82 * Attempts to make a database connection to the given URL. The driver
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83 * should return "null" if it realizes it is the wrong kind of driver to
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84 * connect to the given URL. This will be common, as when the JDBC driver
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85 * manager is asked to connect to a given URL it passes the URL to each
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86 * loaded driver in turn.
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87 *
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88 * The driver should throw an SQLException if it is the right driver to
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89 * connect to the given URL but has trouble connecting to the database.
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90 *
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91 * The java.util.Properties argument can be used to pass arbitrary string
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92 * tag/value pairs as connection arguments. Normally at least "user" and
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93 * "password" properties should be included in the Properties object.
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94 *
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95 * @param url the URL of the database to which to connect
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96 * @param info a list of arbitrary string tag/value pairs as connection
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97 * arguments. Normally at least a "user" and "password" property
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98 * should be included
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99 * @return a Connection object that represents a connection to the URL
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100 * @throws SQLException if a database access error occurs
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101 */
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102 @Override
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103 public Connection connect(final String url, final Properties info) throws SQLException {
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104 // url should be of style jdbc:monetdb://<host>/<database>
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105 if (!acceptsURL(url))
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106 return null;
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107
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108 try {
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109 Target target = new Target(url, info);
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110 return new MonetConnection(target);
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111 } catch (ValidationError | URISyntaxException e) {
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112 throw new SQLException(e.getMessage());
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113 }
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114 }
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115
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116 /**
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117 * Retrieves the driver's major version number. Initially this should be 1.
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118 *
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119 * @return this driver's major version number
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120 */
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121 @Override
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122 public int getMajorVersion() {
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123 return MonetVersion.majorVersion;
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124 }
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125
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126 /**
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127 * Gets the driver's minor version number. Initially this should be 0.
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128 *
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129 * @return this driver's minor version number
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130 */
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131 @Override
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132 public int getMinorVersion() {
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133 return MonetVersion.minorVersion;
0
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134 }
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135
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136 /**
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137 * Gets information about the possible properties for this driver.
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138 *
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139 * The getPropertyInfo method is intended to allow a generic GUI tool to
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140 * discover what properties it should prompt a human for in order to get
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141 * enough information to connect to a database. Note that depending on the
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142 * values the human has supplied so far, additional values may become
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143 * necessary, so it may be necessary to iterate through several calls to the
0
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144 * getPropertyInfo method.
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145 *
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146 * @param url the URL of the database to which to connect
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147 * @param info a proposed list of tag/value pairs that will be sent on
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148 * connect open
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149 * @return an array of DriverPropertyInfo objects describing possible
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150 * properties. This array may be an empty array if no properties
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151 * are required.
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152 */
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153 @Override
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154 public DriverPropertyInfo[] getPropertyInfo(final String url, final Properties info) {
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155 if (!acceptsURL(url))
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156 return null;
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157
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158 // Delegate to enum mcl.net.Parameters, which maintains all connection properties.
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159 // Note that if the URL starts with jdbc:monetdb://, TLS is always off.
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160 // If it starts with jdbc:monetdbs://, TLS is always on.
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161 // Only when the URL is exactly "jdbc:monetdb:", without slashes, TLS is determined
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162 // by the properties.
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163 boolean includeTls = (url.equals("jdbc:monetdb:") || url.startsWith("jdbc:monetdbs:"));
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164 return Parameter.getPropertyInfo(info, includeTls);
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165 }
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166
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167 /**
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168 * Reports whether this driver is a genuine JDBC Compliant&trade; driver. A
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169 * driver may only report true here if it passes the JDBC compliance tests;
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170 * otherwise it is required to return false.
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171 *
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172 * JDBC compliance requires full support for the JDBC API and full support
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173 * for SQL 92 Entry Level. It is expected that JDBC compliant drivers will
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174 * be available for all the major commercial databases.
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175 *
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176 * This method is not intended to encourage the development of non-JDBC
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177 * compliant drivers, but is a recognition of the fact that some vendors are
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178 * interested in using the JDBC API and framework for lightweight databases
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179 * that do not support full database functionality, or for special databases
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180 * such as document information retrieval where a SQL implementation may not
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181 * be feasible.
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182 *
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183 * @return true if this driver is JDBC Compliant; false otherwise
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184 */
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185 @Override
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186 public boolean jdbcCompliant() {
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187 // We're not fully JDBC compliant, but what we support is compliant
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188 return false;
0
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189 }
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190
144
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191 /**
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192 * Return the parent Logger of all the Loggers used by this data source.
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193 * This should be the Logger farthest from the root Logger that is
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194 * still an ancestor of all of the Loggers used by this data source.
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195 * Configuring this Logger will affect all of the log messages
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196 * generated by the data source.
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197 * In the worst case, this may be the root Logger.
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198 *
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199 * @return the parent Logger for this data source
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200 * @throws SQLFeatureNotSupportedException if the data source does
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201 * not use java.util.logging
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202 * @since 1.7
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203 */
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204 @Override
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205 public java.util.logging.Logger getParentLogger() throws SQLFeatureNotSupportedException {
262
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206 throw MonetWrapper.newSQLFeatureNotSupportedException("getParentLogger");
144
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207 }
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208
0
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209 //== end methods of interface driver
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210
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211
333
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212 /**
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213 * Returns a touched up identifying version string of this driver.
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214 * It is made public as it is called from org/monetdb/client/JdbcClient.java
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ff7dbded88c8 getDriverVersion() is now also called from org/monetdb/mcl/net/ClientInfo.java
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215 * and org/monetdb/mcl/net/ClientInfo.java
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216 * @return the version string
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217 */
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218 public static final String getDriverVersion() {
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219 return MonetVersion.driverVersion;
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220 }
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221
0
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222 /** A static Map containing the mapping between MonetDB types and Java SQL types */
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223 /* use SELECT sqlname, * FROM sys.types order by 1, id; to view all MonetDB types */
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224 /* see http://docs.oracle.com/javase/8/docs/api/java/sql/Types.html to view all supported java SQL types */
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225 private static final java.util.Map<String, Integer> typeMap = new java.util.HashMap<String, Integer>();
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226 static {
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227 // fill the typeMap once
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228 // typeMap.put("any", Integer.valueOf(Types.???));
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229 typeMap.put("bigint", Integer.valueOf(Types.BIGINT));
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230 typeMap.put("blob", Integer.valueOf(Types.BLOB));
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231 typeMap.put("boolean", Integer.valueOf(Types.BOOLEAN));
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232 typeMap.put("char", Integer.valueOf(Types.CHAR));
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233 typeMap.put("clob", Integer.valueOf(Types.CLOB));
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234 typeMap.put("date", Integer.valueOf(Types.DATE));
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235 typeMap.put("day_interval", Integer.valueOf(Types.NUMERIC)); // New as of Oct2020 release
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236 typeMap.put("decimal", Integer.valueOf(Types.DECIMAL));
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237 typeMap.put("double", Integer.valueOf(Types.DOUBLE));
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238 // typeMap.put("geometry", Integer.valueOf(Types.???));
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239 // typeMap.put("geometrya", Integer.valueOf(Types.???));
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240 typeMap.put("hugeint", Integer.valueOf(Types.NUMERIC));
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241 typeMap.put("inet", Integer.valueOf(Types.VARCHAR));
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242 typeMap.put("int", Integer.valueOf(Types.INTEGER));
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243 typeMap.put("json", Integer.valueOf(Types.VARCHAR));
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244 // typeMap.put("mbr", Integer.valueOf(Types.???));
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245 typeMap.put("month_interval", Integer.valueOf(Types.INTEGER));
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246 typeMap.put("oid", Integer.valueOf(Types.BIGINT));
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247 // typeMap.put("ptr", Integer.valueOf(Types.???));
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248 typeMap.put("real", Integer.valueOf(Types.REAL));
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249 typeMap.put("sec_interval", Integer.valueOf(Types.DECIMAL));
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250 typeMap.put("smallint", Integer.valueOf(Types.SMALLINT));
642
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251 typeMap.put("str", Integer.valueOf(Types.VARCHAR)); // MonetDB prepare <stmt> uses type 'str' (instead of varchar) for the schema, table and column metadata output. DO NOT REMOVE this entry!
0
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252 // typeMap.put("table", Integer.valueOf(Types.???));
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253 typeMap.put("time", Integer.valueOf(Types.TIME));
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254 typeMap.put("timestamp", Integer.valueOf(Types.TIMESTAMP));
380
bf521f343172 Added support for new Java 8 java.sql.Types: Types.TIME_WITH_TIMEZONE and Types.TIMESTAMP_WITH_TIMEZONE.
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255 typeMap.put("timestamptz", Integer.valueOf(Types.TIMESTAMP_WITH_TIMEZONE)); // new in Java 8: Types.TIMESTAMP_WITH_TIMEZONE (value 2014)
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256 typeMap.put("timetz", Integer.valueOf(Types.TIME_WITH_TIMEZONE)); // new in Java 8: Types.TIME_WITH_TIMEZONE (value 2013)
0
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257 typeMap.put("tinyint", Integer.valueOf(Types.TINYINT));
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258 typeMap.put("url", Integer.valueOf(Types.VARCHAR));
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259 typeMap.put("uuid", Integer.valueOf(Types.VARCHAR));
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260 typeMap.put("varchar", Integer.valueOf(Types.VARCHAR));
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261 typeMap.put("wrd", Integer.valueOf(Types.BIGINT)); // keep it in for old (pre Dec2016) MonetDB servers
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262 typeMap.put("xml", Integer.valueOf(Types.VARCHAR)); // used when "CREATE TYPE xml EXTERNAL NAME xml;" is executed
0
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263 }
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264
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265 /**
223
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266 * Returns the java.sql.Types equivalent of the given MonetDB type name.
0
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267 *
223
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268 * @param type the SQL data type name as used by MonetDB
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269 * @return the matching java.sql.Types constant or
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270 * java.sql.Types.OTHER if nothing matched the given type name
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271 */
295
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272 static final int getJdbcSQLType(final String type) {
223
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273 // find the column type name in the typeMap
295
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274 final Integer tp = typeMap.get(type);
0
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275 if (tp != null) {
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276 return tp.intValue();
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277 }
223
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278 // When type name is not found in the map, for instance
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279 // when it is a new type (not yet added in the above typeMap) or
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280 // when type name is: any or geometry or geometrya or mbr or ptr or table.
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281 return Types.OTHER;
0
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282 }
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283
714
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284 /**
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285 * Returns the Class object for a given java.sql.Types value.
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286 *
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287 * @param type a value from java.sql.Types
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288 * @return a Class object from which an instance would be returned
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289 */
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290 static final Class<?> getClassForType(final int type) {
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291 /**
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292 * This switch returns the types as objects according to table B-3 from
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293 * Oracle's JDBC specification 4.1
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294 */
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295 switch(type) {
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296 case Types.CHAR:
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297 case Types.VARCHAR:
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298 /* case Types.LONGVARCHAR: // MonetDB doesn't use type LONGVARCHAR */
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299 return String.class;
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300 case Types.NUMERIC:
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301 case Types.DECIMAL:
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302 return java.math.BigDecimal.class;
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303 case Types.BOOLEAN:
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304 return Boolean.class;
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305 case Types.TINYINT:
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306 case Types.SMALLINT:
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307 return Short.class;
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308 case Types.INTEGER:
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309 return Integer.class;
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310 case Types.BIGINT:
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311 return Long.class;
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312 case Types.REAL:
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313 return Float.class;
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314 case Types.FLOAT:
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315 case Types.DOUBLE:
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316 return Double.class;
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317 case Types.BINARY: // MonetDB currently does not support these
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318 case Types.VARBINARY: // see treat_blob_as_binary property
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319 /* case Types.LONGVARBINARY: // MonetDB doesn't use type LONGVARBINARY */
714
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320 return byte[].class;
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321 case Types.DATE:
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322 return java.sql.Date.class;
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323 case Types.TIME:
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324 return java.sql.Time.class;
714
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325 case Types.TIME_WITH_TIMEZONE:
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326 return java.time.OffsetTime.class;
714
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327 case Types.TIMESTAMP:
820
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328 return java.sql.Timestamp.class;
714
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329 case Types.TIMESTAMP_WITH_TIMEZONE:
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330 return java.time.OffsetDateTime.class;
714
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331 case Types.CLOB:
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332 return java.sql.Clob.class;
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333 case Types.BLOB:
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334 return java.sql.Blob.class;
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335
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336 // all the rest are currently not implemented and used
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337 default:
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338 return String.class;
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339 }
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340 }
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341
708
5022a57f9d97 Resolve javadoc errors.
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342 private static String TypeMapppingSQL; // cache to optimise getSQLTypeMap()
0
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343 /**
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344 * Returns a String usable in an SQL statement to map the server types
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345 * to values of java.sql.Types using the global static type map.
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346 * The returned string will be a SQL CASE x statement where the x is
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347 * replaced with the given column name (or expression) string.
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348 *
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349 * @param column a String representing the value that should be evaluated
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350 * in the SQL CASE statement
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351 * @return a SQL CASE statement
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352 */
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353 static final String getSQLTypeMap(final String column) {
0
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354 if (TypeMapppingSQL == null) {
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355 // first time, compose TypeMappping SQL string
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356 final StringBuilder val = new StringBuilder((typeMap.size() * (7 + 7 + 7 + 4)) + 14);
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357 for (Entry<String, Integer> entry : typeMap.entrySet()) {
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358 val.append(" WHEN '").append(entry.getKey()).append("' THEN ").append(entry.getValue().toString());
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359 }
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360 val.append(" ELSE " + Types.OTHER + " END");
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361 // as the typeMap is static, cache this SQL part for all next calls
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362 TypeMapppingSQL = val.toString();
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363 }
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364 return "CASE " + column + TypeMapppingSQL;
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365 }
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366 }