| 22 | } |
| 23 | |
| 24 | func getQuerySpanImpl(statement string) (*base.QuerySpan, error) { |
| 25 | parseResults, err := ParseCosmosDB(statement) |
| 26 | if err != nil { |
| 27 | return nil, err |
| 28 | } |
| 29 | |
| 30 | if len(parseResults) == 0 { |
| 31 | return &base.QuerySpan{ |
| 32 | Results: []base.QuerySpanResult{}, |
| 33 | PredicatePaths: nil, |
| 34 | }, nil |
| 35 | } |
| 36 | |
| 37 | if len(parseResults) != 1 { |
| 38 | return nil, errors.Errorf("expecting only one statement to get query span, but got %d", len(parseResults)) |
| 39 | } |
| 40 | |
| 41 | selectStmt, ok := parseResults[0].Node.(*ast.SelectStmt) |
| 42 | if !ok { |
| 43 | return nil, errors.Errorf("expected SelectStmt, got %T", parseResults[0].Node) |
| 44 | } |
| 45 | |
| 46 | qa := analysis.Analyze(selectStmt) |
| 47 | |
| 48 | // Convert projections. |
| 49 | sourceFieldPaths := make(map[string][]*base.PathAST) |
| 50 | if !qa.SelectStar { |
| 51 | for _, proj := range qa.Projections { |
| 52 | for _, fp := range proj.SourcePaths { |
| 53 | if len(fp) == 0 { |
| 54 | continue |
| 55 | } |
| 56 | sourceFieldPaths[proj.Name] = append(sourceFieldPaths[proj.Name], fieldPathToPathAST(fp)) |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | result := base.QuerySpanResult{ |
| 62 | SourceFieldPaths: sourceFieldPaths, |
| 63 | SelectAsterisk: qa.SelectStar, |
| 64 | } |
| 65 | |
| 66 | // Convert predicates. |
| 67 | var predicatePaths map[string]*base.PathAST |
| 68 | if len(qa.Predicates) > 0 { |
| 69 | predicatePaths = make(map[string]*base.PathAST) |
| 70 | for _, fp := range qa.Predicates { |
| 71 | if len(fp) == 0 { |
| 72 | continue |
| 73 | } |
| 74 | pathAST := fieldPathToPathAST(fp) |
| 75 | str, err := pathAST.String() |
| 76 | if err != nil { |
| 77 | slog.Warn("failed to convert path ast to string", log.BBError(err)) |
| 78 | continue |
| 79 | } |
| 80 | predicatePaths[str] = pathAST |
| 81 | } |