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1 # 2008 July 11 |
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2 # |
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3 # The author disclaims copyright to this source code. In place of |
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4 # a legal notice, here is a blessing: |
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5 # |
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6 # May you do good and not evil. |
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7 # May you find forgiveness for yourself and forgive others. |
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8 # May you share freely, never taking more than you give. |
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9 # |
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10 #*********************************************************************** |
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11 # This file implements regression tests for SQLite library. |
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12 # |
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13 # This file experiments with recursion using the "test_eval()" SQL function |
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14 # in order to make sure that SQLite is reentrant. |
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15 # |
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16 # $Id: eval.test,v 1.1 2008/07/11 21:02:54 drh Exp $ |
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17 |
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18 set testdir [file dirname $argv0] |
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19 source $testdir/tester.tcl |
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20 |
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21 # Create a table to work with. |
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22 # |
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23 do_test eval-1.1 { |
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24 execsql { |
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25 CREATE TABLE t1(x INTEGER PRIMARY KEY); |
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26 INSERT INTO t1 VALUES(1); |
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27 INSERT INTO t1 VALUES(2); |
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28 INSERT INTO t1 SELECT x+2 FROM t1; |
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29 INSERT INTO t1 SELECT x+4 FROM t1; |
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30 INSERT INTO t1 SELECT x+8 FROM t1; |
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31 INSERT INTO t1 SELECT x+16 FROM t1; |
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32 INSERT INTO t1 SELECT x+32 FROM t1; |
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33 INSERT INTO t1 SELECT x+64 FROM t1; |
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34 INSERT INTO t1 SELECT x+128 FROM t1; |
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35 INSERT INTO t1 SELECT x+256 FROM t1; |
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36 SELECT count(*), max(x) FROM t1; |
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37 } |
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38 } {512 512} |
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39 do_test eval-1.2 { |
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40 execsql { |
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41 SELECT x, test_eval('SELECT max(x) FROM t1 WHERE x<' || x) FROM t1 LIMIT 5 |
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42 } |
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43 } {1 {} 2 1 3 2 4 3 5 4} |
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44 |
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45 # Delete a row out from under a read cursor in the middle of |
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46 # collecting the arguments for a single row in a result set. |
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47 # Verify that subsequent rows come out as NULL. |
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48 # |
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49 do_test eval-2.1 { |
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50 execsql { |
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51 CREATE TABLE t2(x,y); |
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52 INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; |
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53 SELECT x, test_eval('DELETE FROM t2 WHERE x='||x), y FROM t2; |
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54 } |
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55 } {1 {} {} 2 {} {} 3 {} {} 4 {} {}} |
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56 do_test eval-2.2 { |
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57 execsql { |
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58 SELECT * FROM t2 |
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59 } |
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60 } {} |
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61 |
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62 # Modify a row while it is being read. |
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63 # |
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64 do_test eval-3.1 { |
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65 execsql { |
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66 INSERT INTO t2 SELECT x, x+1 FROM t1 WHERE x<5; |
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67 SELECT x, test_eval('UPDATE t2 SET y=y+100 WHERE x='||x), y FROM t2; |
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68 } |
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69 } {1 {} 102 2 {} 103 3 {} 104 4 {} 105} |
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70 |
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71 finish_test |