dropObjectsInOrder drops all objects in reverse topological order (most dependent first)
(diff *schema.MetadataDiff, buf *strings.Builder)
| 42 | |
| 43 | // dropObjectsInOrder drops all objects in reverse topological order (most dependent first) |
| 44 | func dropObjectsInOrder(diff *schema.MetadataDiff, buf *strings.Builder) { |
| 45 | // Build dependency graph for all objects being dropped or altered |
| 46 | graph := parserbase.NewGraph() |
| 47 | |
| 48 | // Maps to store different object types |
| 49 | viewMap := make(map[string]*schema.ViewDiff) |
| 50 | materializedViewMap := make(map[string]*schema.MaterializedViewDiff) |
| 51 | tableMap := make(map[string]*schema.TableDiff) |
| 52 | functionMap := make(map[string]*schema.FunctionDiff) |
| 53 | procedureMap := make(map[string]*schema.ProcedureDiff) |
| 54 | sequenceMap := make(map[string]*schema.SequenceDiff) |
| 55 | |
| 56 | // Track all object IDs for dependency resolution |
| 57 | allObjects := make(map[string]bool) |
| 58 | |
| 59 | // Collect schemas being dropped to ensure their objects are dropped first |
| 60 | schemasBeingDropped := make(map[string]bool) |
| 61 | for _, schemaDiff := range diff.SchemaChanges { |
| 62 | if schemaDiff.Action == schema.MetadataDiffActionDrop { |
| 63 | schemasBeingDropped[schemaDiff.SchemaName] = true |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | // Add views to graph |
| 68 | for _, viewDiff := range diff.ViewChanges { |
| 69 | if viewDiff.Action == schema.MetadataDiffActionDrop || viewDiff.Action == schema.MetadataDiffActionAlter { |
| 70 | viewID := getMigrationObjectID(viewDiff.SchemaName, viewDiff.ViewName) |
| 71 | graph.AddNode(viewID) |
| 72 | viewMap[viewID] = viewDiff |
| 73 | allObjects[viewID] = true |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | // Add materialized views to graph |
| 78 | for _, mvDiff := range diff.MaterializedViewChanges { |
| 79 | if mvDiff.Action == schema.MetadataDiffActionDrop || mvDiff.Action == schema.MetadataDiffActionAlter { |
| 80 | mvID := getMigrationObjectID(mvDiff.SchemaName, mvDiff.MaterializedViewName) |
| 81 | graph.AddNode(mvID) |
| 82 | materializedViewMap[mvID] = mvDiff |
| 83 | allObjects[mvID] = true |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | // Add functions to graph |
| 88 | for _, funcDiff := range diff.FunctionChanges { |
| 89 | if funcDiff.Action == schema.MetadataDiffActionDrop { |
| 90 | funcID := getMigrationObjectID(funcDiff.SchemaName, funcDiff.FunctionName) |
| 91 | graph.AddNode(funcID) |
| 92 | functionMap[funcID] = funcDiff |
| 93 | allObjects[funcID] = true |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | // Add procedures to graph |
| 98 | for _, procDiff := range diff.ProcedureChanges { |
| 99 | if procDiff.Action == schema.MetadataDiffActionDrop { |
| 100 | procID := getMigrationObjectID(procDiff.SchemaName, procDiff.ProcedureName) |
| 101 | graph.AddNode(procID) |
no test coverage detected