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Summary of ChangesHello @wk989898, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a mechanism to correctly handle DDL statements that add anonymous indexes. Previously, such statements could lead to issues, especially during change data capture (CDC) retries, due to the lack of explicit index names. The changes parse Highlights
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Code Review
This pull request introduces a mechanism to restore anonymous index names in DDL queries, specifically for ADD INDEX operations. It adds a new file ddl_index_rewrite.go with functions to parse and modify the DDL statement, and modifies mysql_writer_ddl.go to incorporate this functionality. Additionally, it includes a test file mysql_writer_ddl_index_rewrite_test.go to verify the index name restoration. The integration test script run.sh is also updated to include index-related operations.
| run_sql "update test.t set col = 55 where id = 5;" | ||
| run_sql "alter table test.t add index (col);" | ||
| run_sql "update test.t set col = 66 where id = 6;" | ||
| run_sql "alter table test.t add index (col);" | ||
| run_sql "update test.t set col = 77 where id = 7;" |
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The script adds multiple indexes with the same name col. While the code in this PR addresses the anonymous index issue, it might be beneficial to ensure that the test script itself uses distinct index names to avoid potential confusion or unexpected behavior during testing. This could be achieved by appending a unique identifier to each index name.
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| } | ||
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| func restoreAnonymousIndexToNamedIndex(query string, tableInfo *common.TableInfo) (string, bool, error) { |
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Consider adding a brief comment explaining the purpose of this function, which is to restore anonymous index names to named indexes in DDL queries.
| newQuery, changed, err := restoreAnonymousIndexToNamedIndex(event.Query, event.TableInfo) | ||
| if err != nil { | ||
| log.Warn("failed to restore anonymous index name", | ||
| zap.String("changefeed", w.ChangefeedID.String()), | ||
| zap.String("query", event.Query), | ||
| zap.Error(err)) |
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The log message indicates a failure to restore the anonymous index name. It would be helpful to include the ChangefeedID in the log message to facilitate debugging in environments with multiple changefeeds. This will help correlate the log with the specific changefeed experiencing the issue.
log.Warn("failed to restore anonymous index name",
zap.String("changefeed", w.ChangefeedID.String()),
zap.String("query", event.Query),
zap.Error(err))| zap.String("query", event.Query), | ||
| zap.String("newQuery", newQuery)) |
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The log message indicates a successful restoration of the anonymous index name. It would be helpful to include the ChangefeedID in the log message to facilitate debugging in environments with multiple changefeeds. This will help correlate the log with the specific changefeed where the restoration occurred.
log.Info("restore anonymous index to named index",
zap.String("changefeed", w.ChangefeedID.String()),
zap.String("query", event.Query),
zap.String("newQuery", newQuery))
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What problem does this PR solve?
Issue Number: close #2327
What is changed and how it works?
Check List
Tests
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note