Merge #91296

91296: upgrades: make adding an index indifferent to constraint ID r=ajwerner a=ajwerner The allocated constraint ID may be different from the one added at bootstrap, and that is okay. This PR also refactors the logic to decide what to zero to be more maintainable. Fixes #91293 Release note: None Co-authored-by: Andrew Werner <[email protected]> Co-authored-by: Renato Costa <[email protected]>
cockroachdb · Nov 4, 2022 · b1b3489 · b1b3489
2 parents e01f162 + 03975a1
commit b1b3489
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diff --git a/pkg/sql/parser/testdata/create_function b/pkg/sql/parser/testdata/create_function
@@ -263,7 +263,7 @@ DETAIL: source SQL:
 CREATE OR REPLACE FUNCTION f(VARIADIC a int = 7) RETURNS INT AS 'SELECT 1' LANGUAGE SQL
                              ^
 HINT: You have attempted to use a feature that is not yet implemented.
-See: https://go.crdb.dev/issue-v/88947/v22.2
+See: https://go.crdb.dev/issue-v/88947/v23.1
 
 error
 CREATE OR REPLACE FUNCTION f(a int = 7) RETURNS INT TRANSFORM AS 'SELECT 1' LANGUAGE SQL

diff --git a/pkg/upgrade/upgrades/schema_changes.go b/pkg/upgrade/upgrades/schema_changes.go
@@ -230,29 +230,43 @@ func hasIndex(storedTable, expectedTable catalog.TableDescriptor, indexName stri
 	if err != nil {
 		return false, errors.Wrapf(err, "index name %s is invalid", indexName)
 	}
-	storedCopy := storedIdx.IndexDescDeepCopy()
-	expectedCopy := expectedIdx.IndexDescDeepCopy()
 	// Ignore the fields that don't matter in the comparison.
-	storedCopy.ID = 0
-	expectedCopy.ID = 0
-	storedCopy.Version = 0
-	expectedCopy.Version = 0
+	storedCopy := indexDescForComparison(storedIdx)
+	expectedCopy := indexDescForComparison(expectedIdx)
+	if err = ensureProtoMessagesAreEqual(expectedCopy, storedCopy); err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+// indexDescForComparison extracts an index descriptor from an index with
+// numerical fields zeroed so that the meaning can be compared directly even
+// if the numerical values differ.
+func indexDescForComparison(idx catalog.Index) *descpb.IndexDescriptor {
+	desc := idx.IndexDescDeepCopy()
+	desc.ID = 0
+	desc.Version = 0
+	desc.ConstraintID = 0
 	// CreatedExplicitly is an ignored field because there exists an inconsistency
 	// between CREATE TABLE (... INDEX) and CREATE INDEX.
 	// See https://github.com/cockroachdb/cockroach/issues/65929.
-	storedCopy.CreatedExplicitly = false
-	expectedCopy.CreatedExplicitly = false
-	storedCopy.StoreColumnNames = []string{}
-	expectedCopy.StoreColumnNames = []string{}
-	storedCopy.StoreColumnIDs = []descpb.ColumnID{0, 0, 0}
-	expectedCopy.StoreColumnIDs = []descpb.ColumnID{0, 0, 0}
-	storedCopy.CreatedAtNanos = 0
-	expectedCopy.CreatedAtNanos = 0
+	desc.CreatedExplicitly = false
 
-	if err = ensureProtoMessagesAreEqual(&expectedCopy, &storedCopy); err != nil {
-		return false, err
+	// The below clearing of names is just buggy. If an index name is reused with
+	// a different set of stored column IDs, we may avoid a migration we intended
+	// to do. This bug has happened, but for the sake of CI, we'll preserve the
+	// bug for the moment.
+	//
+	// TODO(ajwerner): Fix this bug and respect the length of column IDs and the
+	// names.
+	desc.StoreColumnNames = nil
+	desc.StoreColumnIDs = nil
+	for i := range desc.StoreColumnIDs {
+		desc.StoreColumnIDs[i] = 0
 	}
-	return true, nil
+
+	desc.CreatedAtNanos = 0
+	return &desc
 }
 
 // doesNotHaveIndex returns true if storedTable does not have an index named indexName.