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annotate src/main/java/org/monetdb/util/Exporter.java @ 943:ff075ed5ce81

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author Sjoerd Mullender <sjoerd@acm.org>
date Thu, 09 Jan 2025 10:56:14 +0100 (3 months ago)
parents d416e9b6b3d0
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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.util;
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15 import org.monetdb.jdbc.MonetWrapper; // for dq() and sq()
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16
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17 import java.io.PrintWriter;
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18 import java.sql.ResultSet;
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19 import java.sql.SQLException;
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20
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21 public abstract class Exporter {
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22 protected PrintWriter out;
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23 protected boolean useSchema;
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24
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25 protected Exporter(final PrintWriter out) {
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26 this.out = out;
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27 }
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29 public abstract void dumpSchema(
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30 final java.sql.DatabaseMetaData dbmd,
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31 final String type,
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32 final String schema,
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33 final String name) throws SQLException;
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34
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35 public abstract void dumpResultSet(final ResultSet rs) throws SQLException;
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37 public abstract void setProperty(final int type, final int value) throws Exception;
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38 public abstract int getProperty(final int type) throws Exception;
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40
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41 //=== shared utilities
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42
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43 public final void useSchemas(final boolean use) {
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44 useSchema = use;
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45 }
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47 /**
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48 * Convenience function to call the general utility function MonetWrapper.dq()
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49 * to add double quotes around an SQL Identifier such as column or
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50 * table or schema name in SQL queries.
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51 * It also adds escapes for special characters: double quotes and the escape character
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52 *
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53 * FYI: it is made public as it is also called from client/JdbcClient.java
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54 *
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55 * @param in the string to quote
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56 * @return the quoted string
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57 */
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58 public static final String dq(final String in) {
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59 return MonetWrapper.dq(in);
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60 }
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61
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62 /**
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63 * Convenience function to call the general utility function MonetWrapper.sq()
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64 * to add single quotes around string literals in SQL queries.
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65 * It also adds escapes for special characters: single quotes and the escape character
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66 *
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67 * @param in the string to quote
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68 * @return the quoted string
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69 */
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70 protected static final String sq(final String in) {
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71 return MonetWrapper.sq(in);
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72 }
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73
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74 /**
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75 * Simple helper function to repeat a given character a number of times.
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76 *
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77 * @param chr the character to repeat
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78 * @param cnt the number of times to repeat chr
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79 * @return a String holding cnt times chr
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80 */
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81 protected static final String repeat(final char chr, final int cnt) {
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82 final char[] buf = new char[cnt];
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83 java.util.Arrays.fill(buf, chr);
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84 return new String(buf);
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85 }
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86
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87 /**
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88 * Utility method to fetch the "query" column value from sys.tables for a specific view or table in a specific schema
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89 * The "query" column value contains the original SQL view creation text or the ON clause text when it is a REMOTE TABLE
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90 *
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91 * @param con the JDBC connection, may not be null
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92 * @param schema the schema name, may not be null or empty
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93 * @param name the view or table name, may not be null or empty
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94 * @return the value of the "query" field for the specified view/table name and schema. It can return null.
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95 */
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96 protected static final String fetchSysTablesQueryValue(
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97 final java.sql.Connection con,
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98 final String schema,
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99 final String name)
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100 {
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101 java.sql.Statement stmt = null;
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102 ResultSet rs = null;
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103 String val = null;
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104 try {
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105 stmt = con.createStatement();
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106 final String cmd = "SELECT query FROM sys.tables WHERE name = " + sq(name)
95d15f1d750d Restructured code (incl removal of duplicate code) for utility functions dq() and sq() which add double or double quotes and add escapes to string values.
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 406
diff changeset
107 + " and schema_id IN (SELECT id FROM sys.schemas WHERE name = " + sq(schema) + ")";
318
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
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108 rs = stmt.executeQuery(cmd);
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
109 if (rs != null) {
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
110 if (rs.next()) {
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
111 val = rs.getString(1);
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
112 }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
113 }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
114 } catch (SQLException se) {
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
115 /* ignore */
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
116 } finally {
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
117 // free resources
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
118 if (rs != null) {
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
119 try { rs.close(); } catch (SQLException se) { /* ignore */ }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
120 }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
121 if (stmt != null) {
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
122 try { stmt.close(); } catch (SQLException se) { /* ignore */ }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
123 }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
124 }
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
125 return val;
13a9d5316e37 Corrected JdbcClient program: the dumping of a view DDL was incorrect when the view creation statement was not starting with "create view ", such as when it was created using "CREATE VIEW" or "create or replace view".
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
126 }
0
a5a898f6886c Copy of MonetDB java directory changeset e6e32756ad31.
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
127 }