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1
5 package org.h2.command.dml;
6
7 import java.sql.SQLException  ;
8
9 import org.h2.command.Prepared;
10 import org.h2.engine.Session;
11 import org.h2.expression.Expression;
12 import org.h2.expression.ExpressionColumn;
13 import org.h2.expression.ExpressionVisitor;
14 import org.h2.result.LocalResult;
15 import org.h2.table.Column;
16 import org.h2.util.ObjectArray;
17 import org.h2.value.Value;
18 import org.h2.value.ValueArray;
19 import org.h2.value.ValueResultSet;
20
21
22
25
26 public class Call extends Prepared {
27 private Expression value;
28 private ObjectArray expressions;
29
30 public Call(Session session) {
31 super(session);
32 }
33
34 public LocalResult query(int maxrows) throws SQLException {
35 setCurrentRowNumber(1);
36 Value v = value.getValue(session);
37 if(v.getType() == Value.RESULT_SET) {
38 return LocalResult.read(session, ((ValueResultSet)v).getResultSet());
39 } else if(v.getType() == Value.ARRAY) {
40 Value[] list = ((ValueArray)v).getList();
41 ObjectArray expr = new ObjectArray();
42 for(int i = 0; i<list.length; i++) {
43 Value e = list[i];
44 Column col = new Column("C" + (i+1), e.getType(), e.getPrecision(), e.getScale());
45 expr.add(new ExpressionColumn(session.getDatabase(), null, col));
46 }
47 LocalResult result = new LocalResult(session, expr, list.length);
48 result.addRow(list);
49 result.done();
50 return result;
51 }
52 LocalResult result = new LocalResult(session, expressions, 1);
53 Value[] row = new Value[1];
54 row[0] = v;
55 result.addRow(row);
56 result.done();
57 return result;
58 }
59
60 public void prepare() throws SQLException {
61 value = value.optimize(session);
62 expressions = new ObjectArray();
63 expressions.add(value);
64 }
65
66 public void setValue(Expression expression) {
67 value = expression;
68 }
69
70 public boolean isQuery() {
71 return true;
72 }
73
74 public boolean isTransactional() {
75 return true;
76 }
77
78 public boolean isReadOnly() {
79 return value.isEverything(ExpressionVisitor.READONLY);
80
81 }
82
83 }
84 |
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