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154608: scbuild: implement RENAME CONSTRAINT in declarative schema changer r=rafiss a=rafiss This patch implements full support for RENAME CONSTRAINT in the declarative schema changer. The implementation handles two types of constraints: 1. Index-backed constraints (PRIMARY KEY, UNIQUE with index): These rename by dropping the old IndexName element and adding a new one with the updated name. 2. Non-index constraints (CHECK, FK, UNIQUE without index): These rename by dropping the old ConstraintWithoutIndexName element and adding a new one with the updated name. The implementation includes proper validation: - Checks for constraint existence - Validates the constraint is not being added/dropped concurrently - Prevents name conflicts with existing constraints and indexes - Ensures views don't depend on index-backed constraints being renamed New dependency rules ensure the old name element reaches ABSENT before the new name element becomes PUBLIC, preventing conflicts and ensuring correct rollback behavior. ### scplan: add dependency rules for cross-constraint name conflicts during rename This commit enhances the RENAME CONSTRAINT implementation by adding dependency rules to handle name conflicts that occur when multiple constraints are renamed in the same schema change operation. Previously, the dependency rules only handled simple single-constraint renames (A → B). However, when multiple constraints are renamed such that names are swapped or reused (e.g., C1: "old" → "new" while C2: "new" → "other"), the original rules could allow conflicting names to exist simultaneously during execution. This adds two new Precedence rules: 1. For index-backed constraints: Ensures old IndexName elements reach ABSENT before new IndexName elements with the same name become PUBLIC. Includes special handling to exclude secondary index swaps during ALTER PRIMARY KEY operations. 2. For cross-type conflicts: Handles name conflicts between any combination of ConstraintWithoutIndexName and IndexName elements, preventing CHECK constraints from conflicting with UNIQUE constraint names, for example. --- fixes cockroachdb#148341 Release note: None Co-authored-by: Rafi Shamim <[email protected]>
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‎pkg/ccl/schemachangerccl/sctestbackupccl/backup_base_generated_test.go‎

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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_10_of_23.explain‎

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│ ├── SetColumnName {"ColumnID":2,"Name":"v","TableID":108}
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│ ├── SetColumnName {"ColumnID":3,"Name":"m","TableID":108}
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│ ├── AddIndexPartitionInfo {"Partitioning":{"IndexID":1,"TableID":108}}
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│ ├── SetIndexName {"IndexID":1,"Name":"table_regional_b...","TableID":108}
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│ ├── MakePublicPrimaryIndexWriteOnly {"IndexID":6,"TableID":108}
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│ ├── RefreshStats {"TableID":108}
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│ ├── MakeValidatedPrimaryIndexPublic {"IndexID":1,"TableID":108}
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│ ├── SetIndexName {"IndexID":1,"Name":"table_regional_b...","TableID":108}
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│ ├── MakeIndexAbsent {"IndexID":7,"TableID":108}
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│ ├── MakeValidatedPrimaryIndexPublic {"IndexID":1,"TableID":108}
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│ └── UpdateSchemaChangerJob {"IsNonCancelable":true,"RunningStatus":"Pending: Updatin..."}
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├── Stage 2 of 4 in PostCommitNonRevertiblePhase

‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_11_of_23.explain‎

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│ ├── RefreshStats {"TableID":108}
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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_12_of_23.explain‎

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│ ├── SetColumnName {"ColumnID":2,"Name":"v","TableID":108}
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│ ├── SetColumnName {"ColumnID":3,"Name":"m","TableID":108}
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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_13_of_23.explain‎

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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_14_of_23.explain‎

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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_15_of_23.explain‎

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│ ├── SetColumnName {"ColumnID":2,"Name":"v","TableID":108}
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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_16_of_23.explain‎

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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_17_of_23.explain‎

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‎pkg/ccl/schemachangerccl/testdata/end_to_end/add_column_multiple_regional_by_row/add_column_multiple_regional_by_row__rollback_18_of_23.explain‎

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