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489ad44ab5
The code to get read the value of a system variable was extracting its value on PREPARE stage and was substituting the value (as a constant) into the parse tree. Note that this must be a reversible transformation, i.e. it must be reversed before each re-execution. Unfortunately this cannot be reliably done using the current code, because there are other non-reversible source tree transformations that can interfere with this reversible transformation. Fixed by not resolving the value at PREPARE, but at EXECUTE (as the rest of the functions operate). Added a cache of the value (so that it's constant throughout the execution of the query). Note that the cache also caches NULL values. Updated an obsolete related test suite (variables-big) and the code to test the result type of system variables (as per bug 74). |
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| .. | ||
| .cvsignore | ||
| auto_increment.res | ||
| auto_increment.tst | ||
| big_record.pl | ||
| bug25714.c | ||
| CMakeLists.txt | ||
| connect_test.c | ||
| deadlock_test.c | ||
| drop_test.pl | ||
| export.pl | ||
| fork2_test.pl | ||
| fork_big.pl | ||
| fork_big2.pl | ||
| function.res | ||
| function.tst | ||
| grant.pl | ||
| grant.res | ||
| index_corrupt.pl | ||
| insert_and_repair.pl | ||
| insert_test.c | ||
| list_test.c | ||
| lock_test.pl | ||
| lock_test.res | ||
| mail_to_db.pl | ||
| Makefile.am | ||
| myisam-big-rows.tst | ||
| mysql_client_test.c | ||
| pmail.pl | ||
| rename_test.pl | ||
| restore-lock.smack | ||
| select_test.c | ||
| showdb_test.c | ||
| ssl_test.c | ||
| table_types.pl | ||
| test_delayed_insert.pl | ||
| thread_test.c | ||
| truncate.pl | ||