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annotate src/main/java/org/monetdb/util/Exporter.java @ 451:3dfcd06fd8ba

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Correcting typos in documentation text. Also improved the readability of the generated javadoc documents.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 04 Mar 2021 18:57:51 +0100 (2021-03-04)
parents 95d15f1d750d
children 6aa38e8c0f2d
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1 /*
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2 * This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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5 *
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6 * Copyright 1997 - July 2008 CWI, August 2008 - 2021 MonetDB B.V.
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7 */
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8
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f523727db392 Moved Java classes from packages starting with nl.cwi.monetdb.* to package org.monetdb.*
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9 package org.monetdb.util;
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11 import org.monetdb.jdbc.MonetWrapper; // for dq() and sq()
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13 import java.io.PrintWriter;
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14 import java.sql.ResultSet;
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15 import java.sql.SQLException;
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16
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17 public abstract class Exporter {
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18 protected PrintWriter out;
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19 protected boolean useSchema;
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21 protected Exporter(final PrintWriter out) {
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22 this.out = out;
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23 }
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25 public abstract void dumpSchema(
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26 final java.sql.DatabaseMetaData dbmd,
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27 final String type,
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28 final String schema,
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29 final String name) throws SQLException;
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31 public abstract void dumpResultSet(final ResultSet rs) throws SQLException;
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33 public abstract void setProperty(final int type, final int value) throws Exception;
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34 public abstract int getProperty(final int type) throws Exception;
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37 //=== shared utilities
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39 public final void useSchemas(final boolean use) {
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40 useSchema = use;
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41 }
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43 /**
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44 * Convenience function to call the general utility function MonetWrapper.dq()
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45 * to add double quotes around an SQL Identifier such as column or
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46 * table or schema name in SQL queries.
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47 * It also adds escapes for special characters: double quotes and the escape character
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48 *
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49 * FYI: it is made public as it is also called from client/JdbcClient.java
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50 *
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51 * @param in the string to quote
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52 * @return the quoted string
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53 */
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54 public static final String dq(final String in) {
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55 return MonetWrapper.dq(in);
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56 }
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58 /**
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59 * Convenience function to call the general utility function MonetWrapper.sq()
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60 * to add single quotes around string literals in SQL queries.
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61 * It also adds escapes for special characters: single quotes and the escape character
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62 *
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63 * @param in the string to quote
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64 * @return the quoted string
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65 */
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66 protected static final String sq(final String in) {
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67 return MonetWrapper.sq(in);
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68 }
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70 /**
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71 * Simple helper function to repeat a given character a number of times.
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72 *
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73 * @param chr the character to repeat
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74 * @param cnt the number of times to repeat chr
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75 * @return a String holding cnt times chr
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76 */
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77 protected static final String repeat(final char chr, final int cnt) {
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78 final char[] buf = new char[cnt];
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79 java.util.Arrays.fill(buf, chr);
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80 return new String(buf);
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81 }
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82
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83 /**
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84 * 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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85 * 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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86 *
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87 * @param con the JDBC connection, may not be null
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88 * @param schema the schem name, may not be null or empty
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89 * @param name the view or table name, may not be null or empty
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90 * @return the value of the "query" field for the specified view/table name and schema. It can return null.
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91 */
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92 protected static final String fetchSysTablesQueryValue(
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93 final java.sql.Connection con,
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94 final String schema,
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95 final String name)
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96 {
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97 java.sql.Statement stmt = null;
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98 ResultSet rs = null;
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99 String val = null;
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100 try {
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101 stmt = con.createStatement();
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102 final String cmd = "SELECT query FROM sys.tables WHERE name = " + sq(name)
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103 + " and schema_id IN (SELECT id FROM sys.schemas WHERE name = " + sq(schema) + ")";
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Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
parents: 315
diff changeset
104 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
105 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
106 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
107 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
108 }
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 }
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 } 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
111 /* 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
112 } 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
113 // 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
114 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
115 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
116 }
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 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
118 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
119 }
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 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
122 }
0
a5a898f6886c Copy of MonetDB java directory changeset e6e32756ad31.
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
123 }