[FLINK-36165][source-connector/mysql] Support capturing snapshot data with conditions #3776
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -55,6 +55,7 @@ | |
| import java.util.Arrays; | ||
| import java.util.HashMap; | ||
| import java.util.HashSet; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
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@@ -83,6 +84,7 @@ | |
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_INCREMENTAL_SNAPSHOT_UNBOUNDED_CHUNK_FIRST_ENABLED; | ||
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_NEWLY_ADDED_TABLE_ENABLED; | ||
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_SNAPSHOT_FETCH_SIZE; | ||
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_SNAPSHOT_FILTERS; | ||
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_STARTUP_MODE; | ||
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_STARTUP_SPECIFIC_OFFSET_FILE; | ||
| import static org.apache.flink.cdc.connectors.mysql.source.MySqlDataSourceOptions.SCAN_STARTUP_SPECIFIC_OFFSET_GTID_SET; | ||
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@@ -112,6 +114,8 @@ public class MySqlDataSourceFactory implements DataSourceFactory { | |
| private static final Logger LOG = LoggerFactory.getLogger(MySqlDataSourceFactory.class); | ||
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| public static final String IDENTIFIER = "mysql"; | ||
| public static final String SNAPSHOT_FILTER_TABLE_KEY = "table"; | ||
| public static final String SNAPSHOT_FILTER_FILTER_KEY = "filter"; | ||
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| @Override | ||
| public DataSource createDataSource(Context context) { | ||
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@@ -284,11 +288,78 @@ public DataSource createDataSource(Context context) { | |
| LOG.info("Add chunkKeyColumn {}.", chunkKeyColumnMap); | ||
| configFactory.chunkKeyColumn(chunkKeyColumnMap); | ||
| } | ||
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| List<Map<String, String>> snapshotFilters = config.get(SCAN_SNAPSHOT_FILTERS); | ||
| if (snapshotFilters != null && !snapshotFilters.isEmpty()) { | ||
| Map<String, String> snapshotFiltersMap = | ||
| parseAndValidateSnapshotFilters(snapshotFilters); | ||
| LOG.info("Add snapshotFilters {}.", snapshotFiltersMap); | ||
| configFactory.snapshotFilters(snapshotFiltersMap); | ||
| } | ||
|
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| String metadataList = config.get(METADATA_LIST); | ||
| List<MySqlReadableMetadata> readableMetadataList = listReadableMetadata(metadataList); | ||
| return new MySqlDataSource(configFactory, readableMetadataList); | ||
| } | ||
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| /** | ||
| * Parses and validates snapshot filters configuration. | ||
| * | ||
| * @param snapshotFilters List of filter entries, each containing 'table' and 'filter' keys | ||
| * @return LinkedHashMap preserving insertion order, mapping table patterns to filter | ||
| * expressions | ||
| * @throws ValidationException If any entry is missing required keys or contains duplicate table | ||
| * patterns | ||
| */ | ||
| private Map<String, String> parseAndValidateSnapshotFilters( | ||
| List<Map<String, String>> snapshotFilters) { | ||
| Map<String, String> result = new LinkedHashMap<>(); | ||
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| for (int i = 0; i < snapshotFilters.size(); i++) { | ||
| Map<String, String> entry = snapshotFilters.get(i); | ||
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| // Validate required keys | ||
| String table = entry.get(SNAPSHOT_FILTER_TABLE_KEY); | ||
| String filter = entry.get(SNAPSHOT_FILTER_FILTER_KEY); | ||
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| if (table == null || table.trim().isEmpty()) { | ||
| throw new ValidationException( | ||
| String.format( | ||
| "Snapshot filter entry at index %d is missing required key '%s'. " | ||
| + "Each entry must contain both '%s' and '%s' keys.", | ||
| i, | ||
| SNAPSHOT_FILTER_TABLE_KEY, | ||
| SNAPSHOT_FILTER_TABLE_KEY, | ||
| SNAPSHOT_FILTER_FILTER_KEY)); | ||
| } | ||
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| if (filter == null || filter.trim().isEmpty()) { | ||
| throw new ValidationException( | ||
| String.format( | ||
| "Snapshot filter entry at index %d is missing required key '%s'. " | ||
| + "Each entry must contain both '%s' and '%s' keys.", | ||
| i, | ||
| SNAPSHOT_FILTER_FILTER_KEY, | ||
| SNAPSHOT_FILTER_TABLE_KEY, | ||
| SNAPSHOT_FILTER_FILTER_KEY)); | ||
| } | ||
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| // Check for duplicates | ||
| if (result.containsKey(table)) { | ||
| throw new ValidationException( | ||
| String.format( | ||
| "Duplicate table pattern '%s' found in snapshot filters at index %d. " | ||
| + "Each table pattern can only appear once. " | ||
| + "Previous definition: '%s', Current definition: '%s'.", | ||
| table, i, result.get(table), filter)); | ||
| } | ||
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| result.put(table, filter); | ||
| } | ||
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| return result; | ||
| } | ||
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| private List<MySqlReadableMetadata> listReadableMetadata(String metadataList) { | ||
| if (StringUtils.isNullOrWhitespaceOnly(metadataList)) { | ||
| return new ArrayList<>(); | ||
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@@ -358,6 +429,7 @@ public Set<ConfigOption<?>> optionalOptions() { | |
| options.add(PARSE_ONLINE_SCHEMA_CHANGES); | ||
| options.add(SCAN_INCREMENTAL_SNAPSHOT_UNBOUNDED_CHUNK_FIRST_ENABLED); | ||
| options.add(SCAN_INCREMENTAL_SNAPSHOT_BACKFILL_SKIP); | ||
| options.add(SCAN_SNAPSHOT_FILTERS); | ||
| return options; | ||
| } | ||
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It is better to add a new use example for this feature.
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Added usage examples in commit cc477d5:
Filters" section with a YAML pipeline example demonstrating the
scan.snapshot.filters list syntax.
Filter" section with both SQL DDL and DataStream API examples
showing the scan.snapshot.filter option usage.