Add support for fallback analyze #16
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This commit adds support for fallback analyze. This feature is useful when the analyze command fails to analyze the table. Fixed missing periods in comments.
WalkthroughThe pull request introduces several improvements to the mdtsql package, focusing on enhancing file handling, error reporting, and type flexibility. Key changes include modifying the Changes
Sequence DiagramsequenceDiagram
participant User
participant Analyze
participant Reader
participant TableProcessor
User->>Analyze: Provide filename
Analyze->>Reader: Open file/stdin
Reader-->>Analyze: Return input
Analyze->>TableProcessor: Process markdown tables
TableProcessor-->>Analyze: Return tables with names and types
Analyze-->>User: Return processed tables or error
Poem
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🚧 Files skipped from review as they are similar to previous changes (1)
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Actionable comments posted: 2
🧹 Nitpick comments (5)
table.go (2)
14-17: Consider error handling for edge cases.Both
Names()andTypes()methods always return nil error. Consider handling edge cases where the slices might be nil or empty.func (t table) Names() ([]string, error) { + if t.names == nil { + return nil, fmt.Errorf("names not initialized") + } return t.names, nil } func (t table) Types() ([]string, error) { + if t.types == nil { + return nil, fmt.Errorf("types not initialized") + } return t.types, nil }Also applies to: 19-22
24-27: Enhance method documentation.The comment "returns the body" could be more descriptive. Consider explaining what the body represents and its structure.
-// PreReadRow returns the body. +// PreReadRow returns the table body as a slice of rows, where each row is a slice of values. +// This method is used for pre-reading the table data before processing.cmd/query.go (1)
36-37: Add input validation for query arguments.The query is constructed by joining all arguments without validation. Consider checking for empty args to provide a better error message.
+ if len(args) == 0 { + return fmt.Errorf("no query provided") + } query := strings.Join(args, " ") return trd.Exec(query)analyze.go (2)
13-13: Enhance function documentation for better clarity.The documentation for this exported function should be more comprehensive. Consider adding details about:
- Support for stdin input when fileName is "-" or "stdin"
- Description of the returned table structure
- Possible error conditions and their meanings
-// Analyze parses the markdown file and returns the table information. +// Analyze parses a markdown file or stdin input and returns the table information. +// It accepts a fileName parameter which can be: +// - A path to a markdown file +// - "-" or "stdin" to read from standard input +// - A path with optional table specification (e.g., "file.md::table1") +// +// Returns a slice of parsed tables and an error if: +// - fileName is empty +// - file cannot be opened +// - parsing fails +// - no markdown tables are found
59-67: Consider adding input validation and error handling.While the implementation is clean, consider adding:
- Validation for nil writer
- Validation for table structure consistency (ensure lengths of names and types match)
func Dump(w io.Writer, tables []table) { + if w == nil { + return + } for _, table := range tables { + if len(table.names) != len(table.types) { + continue // or handle error + } fmt.Fprintf(w, "Table Name: [%s]\n", table.tableName)
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Configuration used: CodeRabbit UI
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📒 Files selected for processing (7)
analyze.go(3 hunks)cmd/list.go(2 hunks)cmd/mdtsql/main.go(1 hunks)cmd/query.go(3 hunks)cmd/root.go(2 hunks)cmd/table.go(2 hunks)table.go(1 hunks)
✅ Files skipped from review due to trivial changes (3)
- cmd/root.go
- cmd/table.go
- cmd/mdtsql/main.go
🔇 Additional comments (3)
table.go (1)
30-32: Verify if stub implementation is intentional.
The ReadRow method always returns nil, io.EOF which appears to be a stub implementation. If this is intentional, consider adding a comment explaining why.
✅ Verification successful
The stub implementation is intentional and correctly documented
The ReadRow method's behavior is intentional as indicated by the comment "// ReadRow only returns EOF" present in both table.go and reader.go. This is part of a CLI tool that reads markdown tables and executes SQL queries on them, where the data is pre-loaded and accessed through PreReadRow instead of row-by-row reading.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for any actual implementations or usages of ReadRow
rg -A 5 "ReadRow" --type go
Length of output: 654
Script:
#!/bin/bash
# Let's check for any tests or documentation that might explain this behavior
rg -l "ReadRow.*EOF" --type go
rg -B 5 "type.*table" --type go
rg -B 5 "type.*MDTReader" --type go
Length of output: 1103
Script:
#!/bin/bash
# Let's check the repository's documentation and the package's purpose
cat README.md
rg "package" --type go
Length of output: 5049
analyze.go (2)
39-41: LGTM! Good error handling addition.
The new check for empty tables with a clear error message improves the function's robustness.
Line range hint 13-42: Verify fallback analysis implementation.
The PR objective mentions adding fallback analysis support, but the implementation is not visible in this file. Let's verify where the fallback mechanism is implemented.
✅ Verification successful
Fallback analysis is already implemented in the codebase
The fallback mechanism is implemented in cmd/list.go where it falls back to trdsql.Analyze when the primary analysis fails. The code comment explicitly states "fallback to trdsql.Analyze", indicating this is the fallback implementation mentioned in the PR objectives.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Search for fallback analysis implementation
rg -l "fallback.*analyz|analyz.*fallback" --type go
# Search for references to Analyze function to understand the fallback flow
ast-grep --pattern 'Analyze($$$)'
Length of output: 89
Script:
#!/bin/bash
# Let's try a broader search for any fallback-related terms
rg -i "fallback" --type go -A 3
# Search for the Analyze function implementation and its usage
rg "func.*Analyze" --type go -A 5
# Look for any potential configuration or settings related to fallback
rg "type.*Config|type.*Options" --type go -A 5
Length of output: 541
| if err == nil { | ||
| mdtsql.Dump(os.Stdout, tables) | ||
| return nil | ||
| } | ||
|
|
||
| // fallback to trdsql.Analyze. | ||
| if err := trdsql.Analyze(fileName, trdsql.NewAnalyzeOpts(), trdsql.NewReadOpts()); err != nil { | ||
| return err | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Improve error handling and messaging.
The current implementation discards the original error from mdtsql.Analyze. Consider preserving it for debugging and providing clearer error messages.
tables, err := mdtsql.Analyze(fileName)
if err == nil {
mdtsql.Dump(os.Stdout, tables)
return nil
}
+ // Store original error for context
+ origErr := fmt.Errorf("primary analysis failed: %w", err)
+
// fallback to trdsql.Analyze.
if err := trdsql.Analyze(fileName, trdsql.NewAnalyzeOpts(), trdsql.NewReadOpts()); err != nil {
- return err
+ return fmt.Errorf("both primary and fallback analysis failed: %v (fallback: %v)", origErr, err)
}
return nil📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if err == nil { | |
| mdtsql.Dump(os.Stdout, tables) | |
| return nil | |
| } | |
| // fallback to trdsql.Analyze. | |
| if err := trdsql.Analyze(fileName, trdsql.NewAnalyzeOpts(), trdsql.NewReadOpts()); err != nil { | |
| return err | |
| } | |
| if err == nil { | |
| mdtsql.Dump(os.Stdout, tables) | |
| return nil | |
| } | |
| // Store original error for context | |
| origErr := fmt.Errorf("primary analysis failed: %w", err) | |
| // fallback to trdsql.Analyze. | |
| if err := trdsql.Analyze(fileName, trdsql.NewAnalyzeOpts(), trdsql.NewReadOpts()); err != nil { | |
| return fmt.Errorf("both primary and fallback analysis failed: %v (fallback: %v)", origErr, err) | |
| } | |
| return nil |
| var reader io.Reader = os.Stdin | ||
| if fileName != "stdin" { | ||
| var err error | ||
| f, err = os.Open(fileName) | ||
| f, err := os.Open(fileName) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } else { | ||
| f = os.Stdin | ||
| reader = f |
There was a problem hiding this comment.
Fix resource leak: file handle is never closed.
The opened file handle is never closed, which could lead to resource leaks. Consider using defer to ensure proper cleanup.
var reader io.Reader = os.Stdin
if fileName != "stdin" {
f, err := os.Open(fileName)
if err != nil {
return nil, err
}
+ defer f.Close()
reader = f
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| var reader io.Reader = os.Stdin | |
| if fileName != "stdin" { | |
| var err error | |
| f, err = os.Open(fileName) | |
| f, err := os.Open(fileName) | |
| if err != nil { | |
| return nil, err | |
| } | |
| } else { | |
| f = os.Stdin | |
| reader = f | |
| var reader io.Reader = os.Stdin | |
| if fileName != "stdin" { | |
| f, err := os.Open(fileName) | |
| if err != nil { | |
| return nil, err | |
| } | |
| defer f.Close() | |
| reader = f |
There was a problem hiding this comment.
@noborus You're welcome! Let me know if there's anything else I can do.
This commit adds support for fallback analyze. This feature is useful when the analyze command fails to analyze the table.
Fixed missing periods in comments.
Summary by CodeRabbit
New Features
NamesandTypes.Bug Fixes
Documentation
Refactor