Improve applier .ReadMigrationRangeValues() func accuracy
#1164
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shlomi-noach
approved these changes
Aug 21, 2022
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This change is fine. Ultimately it does not matter that much: we take note of the binlog position before we evaluate the min/max range values. That means however we read the min/max values, any changes that happen in between -- we will address those changes as we iterate the binary logs; the changes will be covered by the binlog stream that we process.
Thanks @shlomi-noach! Yeah I think so, I'm glad this didn't break any assumptions I didn't know about 👍
Agreed, I think this is more of a cosmetic change that won't actually affect the correctness of the end-result |
dm-2
approved these changes
Sep 6, 2022
d-bytebase
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to bytebase/gh-ost
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Dec 13, 2022
* Add script and docs for linter (github#1151) * Enable more `golang-ci` linters (github#1149) * Only build RPM and deb packages for amd64 * Convert character to bytes and insert into table using latin1 * delete junk files * restore connection charset to utf8mb4 * Allow zero in dates (github#1161) * Merge pull request #31 from openark/zero-date Support zero date and zero in date, via dedicated command line flag * Merge pull request #32 from openark/existing-date-with-zero Support tables with existing zero dates * Remove un-needed ignore_versions file * Fix new lint errors from golang-ci update Co-authored-by: Shlomi Noach <[email protected]> * Add missing doc from PR github#1131 (github#1162) * Set a transaction isolation level for MySQL connections (github#1156) * Set transaction isolation in connections * Revert load_map.go change * Var rename * Restore comment * Some fix to unit tests. * convert to bytes if character string without charsetConversion. * chore: remove duplicate word in comments (github#1175) Signed-off-by: Abirdcfly <[email protected]> Signed-off-by: Abirdcfly <[email protected]> * Improve applier `.ReadMigrationRangeValues()` func accuracy (github#1164) * Use a transaction in applier `ReadMigrationRangeValues` func * Private func names * Add basic tests for applier (github#1165) * Add basic tests for applier * Add header * Add basic test for inspector (github#1166) * Add basic test for inspector * Add header * Fix return * Add basic tests to migrator (github#1168) * add-rocksdb-as-transactional-engine * Add basic test for hooks (github#1179) * Enable more `golangci-lint` linters (github#1181) * Print status to migration context logger * fix CI tests to ubuntu-20.04 because ubuntu-22.04 (current -latest) doesn't support MySQL 5.7 * temp commit to investigate datetime-with-zero test failure * more testing * add extra debugging output * debugging * add error detection for test setup, sort tests to make it easier to track progress * fix broken test by removing invalid insert statement * Fix: Change table name table name is 'tbl' not 'tble' * Attempt instant DDL if supported * minor cleanup * Add tests, incorporate feedback * Improve docs * Address PR feedback * Make it clear in docs it is disabled by default but safe. * Update go/logic/migrator.go Co-authored-by: dm-2 <[email protected]> * remove useless func per review * support rocksdb as transactional engine * Modify tests to support rocksdb tests * SetConnectionConfig * add support for rocksdb * add support for rocksdb * add percona to versions in workflows * add description and optimize tests * Apply suggestions from code review Co-authored-by: dm-2 <[email protected]> * Apply suggestions from code review Co-authored-by: Tim Vaillancourt <[email protected]> * Update go/logic/applier.go Signed-off-by: Abirdcfly <[email protected]> Co-authored-by: Tim Vaillancourt <[email protected]> Co-authored-by: dm-2 <[email protected]> Co-authored-by: wangzihuacool <[email protected]> Co-authored-by: wangzihuacool <[email protected]> Co-authored-by: Shlomi Noach <[email protected]> Co-authored-by: Abirdcfly <[email protected]> Co-authored-by: Nicholas Calugar <[email protected]> Co-authored-by: Hasan Mshawrab <[email protected]> Co-authored-by: Morgan Tocker <[email protected]> Co-authored-by: Morgan Tocker <[email protected]> Co-authored-by: lukelewang <[email protected]>
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Description
This PR moves the applier
.ReadMigrationRangeValues()func to use a single transaction for both the min and max queriesGathering these values in the same transaction is more accurate than the current approach where 2 x different auto-commit transactions grab these values
Lastly, the min/max funcs were made "private" because they're only called by
.ReadMigrationRangeValues()script/cibuildreturns with no formatting errors, build errors or unit test errors.