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annotate m-toolbox/classes/+utils/@jmysql/execute.m @ 0:f0afece42f48

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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 function rows = execute(conn, query, varargin)
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2 % execute the given SQL query with optional parameters varargin
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3 % through connection conn. the results are returned in a 2d cell
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4 % array
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5 %
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6 % differs from similar riutines in utils.jmysql by the use of proper
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7 % SQL escaping of the query arguments. the connection object should
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8 % be an object implementing the java.sql.Connection interface.
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9
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10 if nargin < 2
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11 error('### incorrect usage');
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12 end
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13 if ~isjava(conn)
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14 error('### invalid connection');
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15 end
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16
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17 % return value
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18 rows = {};
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19
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20 % build query
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21 stmt = conn.prepareStatement(query);
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22 for kk = 1:numel(varargin)
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23 stmt.setObject(kk, varargin{kk});
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24 end
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25
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26 % execute query
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27 rs = stmt.executeQuery();
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28
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29 % get results into a cell array
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30 ncols = rs.getMetaData.getColumnCount();
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31 row = 1;
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32 while rs.next()
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33 for kk = 1:ncols
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34 rows{row,kk} = java2matlab(rs.getObject(kk));
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35 end
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36 row = row + 1;
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37 end
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38
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39 end
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40
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41 function val = java2matlab(val)
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42 % matlab converts all base types. just add a conversion for datetime columns
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43 switch class(val)
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44 case 'java.sql.Timestamp'
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45 val = time(plist('time', char(val), 'timezone', 'UTC'));
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46 end
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47 end