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cdc: cdceval type resolution has trouble with nullable columns #90455
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A-cdc
Change Data Capture
A-cdc-expressions
Features related to changefeed projections and filters
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Features related to changefeed projections and filters
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Oct 21, 2022
cc @cockroachdb/cdc |
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Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Nov 17, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Nov 29, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Nov 29, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Nov 30, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Nov 30, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Dec 1, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Dec 1, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
miretskiy
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Dec 2, 2022
Previous PRs (cockroachdb#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev) AS prevJson FROM tbl ``` Fixes cockroachdb#90416 Fixes cockroachdb#90714 Fixes cockroachdb#90421 Fixes cockroachdb#90455 Informs cockroachdb#90442 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward-incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function.
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85177: changefeedccl: Rely on optimizer and distSQL when evaluating CDC expressions. r=miretskiy a=miretskiy Previous PRs (#82562) introduced CDC expressions. This PR builds on that and replaces majority of hand written evaluation logic in favor of tighter integration with optimizer and dist SQL processors. CDC expression, which is really a simplified `SELECT` statement, is now planned by the optimizer `sql.PlanCDCExpression`. The resulting plan is then fed to the distSQL, to produce a specialized CDC execution plan (`sql.RunCDCEvaluation`). The execution plan is special in that it is guaranteed to be a local execution plan, and changefeed is expected to "feed" the data (encoded row) directly into the execution pipeline, with change aggregators consuming resulting projection. The benefit of this approach is that expression optimization, and evaluation is now handled by optimizer and distSQL. The responsibility of CDC evaluation package is to make sure that CDC expression is "sane" and to setup CDC specific functions. Since the whole expression is not yet fully planned by distSQL (i.e. we don't have changefeed operator implemented yet), the integration between CDC expressions and optimizer/execInfra is not yet complete. In particular, this PR does not replace current distSQL execution for CDC -- namely, we still keep the same execution model using hand planned `ChangeFrontierProcessor` and `ChangeAggretagorProcessor`. It augments existing model, while tightening the integration. Still, this is an improvement over previous state. The follow on work will complete integration. Some changes enabled by this implementation include the replacement of `cdc_prev()` function which returned JSONb representation of the previous row, with a `cdc_prev` tuple. This makes changefeed expressions more natural since tuples are strongly typed: ``` SELECT * FROM tbl WHERE col != cdc_prev.col` ``` In addition, by using tuple to represent the state of the previous row, we can now leverage existing SQL functions. For example, to emit previus row as JSONb we can do: ``` SELECT *, row_to_json(cdc_prev.*) AS prevJson FROM tbl ``` Fixes #90416 Fixes #90714 Fixes #90455 Informs #90442 Informs CRDB-18978 Informs CRDB-17161 Release note (enterprise change): CDC expressions are now planned and evaluated using SQL optimizer and distSQL execution. The state of the previous row is now exposed as `cdc_prev` tuple. Release note (backward incompatible change): The replacement of cdc_prev() function in favor a cdc_prev tuple is an incompatible change that may break changefeeds that use old cdc_prev() function. 92951: ui: show txn idle time in txn detail page r=matthewtodd a=matthewtodd Part of #86667 |Before|After| |--|--| |<img width="1628" alt="Screen Shot 2022-12-02 at 3 16 08 PM" src="https://user-images.githubusercontent.com/5261/205379330-e1990261-9ca4-4d73-878f-a21ed0a90412.png">|<img width="1628" alt="Screen Shot 2022-12-02 at 3 16 15 PM" src="https://user-images.githubusercontent.com/5261/205379338-956a1801-07db-48e8-9a9c-bbe9e84fb5b6.png">| Release note (ui change): The "Transaction resource usage" card on the transaction fingerprint page now includes an "Idle latency" row, representing the time spent by the application performing other work while holding this transaction open. Co-authored-by: Yevgeniy Miretskiy <[email protected]> Co-authored-by: Matthew Todd <[email protected]>
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Labels
A-cdc
Change Data Capture
A-cdc-expressions
Features related to changefeed projections and filters
C-bug
Code not up to spec/doc, specs & docs deemed correct. Solution expected to change code/behavior.
T-cdc
Jira issue: CRDB-20778
Epic CRDB-17161
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