support multi-inherit #2738
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -332,84 +332,139 @@ func assignColumnIndexesInSchema(schema sql.Schema) sql.Schema { | |
| } | ||
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| func (b *Builder) buildCreateTableLike(inScope *scope, ct *ast.DDL) *scope { | ||
| database := b.resolveDbForTable(ct.Table) | ||
| newTableName := strings.ToLower(ct.Table.Name.String()) | ||
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| var pkSch sql.PrimaryKeySchema | ||
| var coll sql.CollationID | ||
| var comment string | ||
| outScope := inScope.push() | ||
| if ct.TableSpec != nil { | ||
| pkSch, coll, _ = b.tableSpecToSchema(inScope, outScope, database, strings.ToLower(ct.Table.Name.String()), ct.TableSpec, false) | ||
| } | ||
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| var ok bool | ||
| var pkOrdinals []int | ||
| var newSch sql.Schema | ||
| newSchMap := make(map[string]struct{}) | ||
| var idxDefs sql.IndexDefs | ||
| var checkDefs []*sql.CheckConstraint | ||
| for _, likeTable := range ct.OptLike.LikeTables { | ||
| outScope, ok = b.buildTablescan(outScope, likeTable, nil) | ||
| if !ok { | ||
| b.handleErr(sql.ErrTableNotFound.New(likeTable.Name.String())) | ||
| } | ||
| lTable, isResTbl := outScope.node.(*plan.ResolvedTable) | ||
| if !isResTbl { | ||
| err := fmt.Errorf("expected resolved table: %s", likeTable.Name.String()) | ||
| b.handleErr(err) | ||
| } | ||
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| if coll == sql.Collation_Unspecified { | ||
| coll = lTable.Collation() | ||
| } | ||
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| if comment == "" { | ||
| comment = lTable.Comment() | ||
| } | ||
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| schOff := len(newSch) | ||
| hasSkippedCols := false | ||
| for _, col := range lTable.Schema() { | ||
| newCol := *col | ||
| name := strings.ToLower(newCol.Name) | ||
| if _, ok := newSchMap[name]; ok { | ||
| // TODO: throw warning | ||
| hasSkippedCols = true | ||
| continue | ||
| } | ||
| newSchMap[name] = struct{}{} | ||
| newCol.Source = newTableName | ||
| newSch = append(newSch, &newCol) | ||
| } | ||
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| // if a column was skipped due to duplicates, don't copy over PK ords, idxDefs, or checkDefs | ||
| // since they might be incorrect | ||
| if hasSkippedCols { | ||
| continue | ||
| } | ||
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| // Copy over primary key schema ordinals | ||
| if pkTable, isPkTable := lTable.Table.(sql.PrimaryKeyTable); isPkTable { | ||
| for _, pkOrd := range pkTable.PrimaryKeySchema().PkOrdinals { | ||
| pkOrdinals = append(pkOrdinals, schOff+pkOrd) | ||
| } | ||
| } | ||
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| // Load index definitions | ||
| if idxTbl, isIdxTbl := lTable.Table.(sql.IndexAddressableTable); isIdxTbl { | ||
| idxs, err := idxTbl.GetIndexes(b.ctx) | ||
| if err != nil { | ||
| b.handleErr(err) | ||
| } | ||
| for _, idx := range idxs { | ||
| if idx.IsGenerated() { | ||
| continue | ||
| } | ||
| constraint := sql.IndexConstraint_None | ||
| if idx.IsUnique() { | ||
| if idx.ID() == "PRIMARY" { | ||
| // TODO: deal with multiple primary key constraints? | ||
| constraint = sql.IndexConstraint_Primary | ||
| } else { | ||
| constraint = sql.IndexConstraint_Unique | ||
| } | ||
| } | ||
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| columns := make([]sql.IndexColumn, len(idx.Expressions())) | ||
| for i, col := range idx.Expressions() { | ||
| // TODO: find a better way to get only the column name if the table is present | ||
| col = strings.TrimPrefix(col, idxTbl.Name()+".") | ||
| columns[i] = sql.IndexColumn{Name: col} | ||
| } | ||
| idxDefs = append(idxDefs, &sql.IndexDef{ | ||
| Name: idx.ID(), | ||
| Storage: sql.IndexUsing_Default, | ||
| Constraint: constraint, | ||
| Columns: columns, | ||
| Comment: idx.Comment(), | ||
| }) | ||
| } | ||
| } | ||
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| // Load check constraints | ||
| if chkTable, isChkTable := lTable.Table.(sql.CheckTable); isChkTable { | ||
| checks, err := chkTable.GetChecks(b.ctx) | ||
| if err != nil { | ||
| b.handleErr(err) | ||
| } | ||
| for _, check := range checks { | ||
| checkConstraint := b.buildCheckConstraint(outScope, &check) | ||
| if err != nil { | ||
| b.handleErr(err) | ||
| } | ||
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| // Prevent a name collision between old and new checks. | ||
| // New check name will be assigned a name during building. | ||
| checkConstraint.Name = "" | ||
| checkDefs = append(checkDefs, checkConstraint) | ||
| } | ||
| } | ||
| } | ||
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| var hasSkippedCols bool | ||
| for _, col := range pkSch.Schema { | ||
|
There was a problem hiding this comment. is explicit schema not incompatible with the LIKE list? There was a problem hiding this comment. do we have tests for this? |
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| name := strings.ToLower(col.Name) | ||
| if _, ok := newSchMap[name]; ok { | ||
| // TODO: throw warning | ||
| hasSkippedCols = true | ||
| continue | ||
| } | ||
| newSch = append(newSch, col) | ||
| } | ||
| if !hasSkippedCols { | ||
| for _, pkOrd := range pkSch.PkOrdinals { | ||
| pkOrdinals = append(pkOrdinals, len(newSch)+pkOrd) | ||
| } | ||
| } | ||
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@@ -420,13 +475,13 @@ func (b *Builder) buildCreateTableLike(inScope *scope, ct *ast.DDL) *scope { | |
| Schema: pkSchema, | ||
| IdxDefs: idxDefs, | ||
| ChDefs: checkDefs, | ||
| Collation: coll, | ||
| Comment: comment, | ||
| } | ||
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| b.qFlags.Set(sql.QFlagSetDatabase) | ||
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| outScope.setTableAlias(newTableName) | ||
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There was a problem hiding this comment. I think this is probably incorrect strictly speaking, as you'll only have the columns in the last table in the list in this scope. Not sure when it matters though. @max-hoffman ? There was a problem hiding this comment. it's definitely an abuse of the model...a more reasonable pass might accumulate the table cols into a top-level output scope or return an empty scope |
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| outScope.node = plan.NewCreateTable(database, newTableName, ct.IfNotExists, ct.Temporary, tableSpec) | ||
| return outScope | ||
| } | ||
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are the semantics really this simple? seems like you'd need way more testing to figure out correct behavior