feat(v34): introduce DataProvider trait for data abstraction #4
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- Create minimal DataProvider trait with core data access methods - Add DataViewProvider trait for filtering/sorting operations - Include default implementations for common methods - Add comprehensive tests for the new traits This is the first step in migrating to a DataTable/DataView architecture. The traits define the contract that the TUI will use to access data, allowing us to gradually replace the underlying implementation.
TimelordUK
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Oct 26, 2025
Extends the AST preprocessing pipeline to work with script execution (-f flag), enabling all Quick Win features (WHERE/GROUP BY/HAVING alias expansion) in SQL scripts with GO separators. ## Problem Scripts executed with -f flag were bypassing the preprocessing pipeline, so Quick Win features (alias expansion) only worked in query mode (-q) and interactive mode. This made scripts inconsistent with other execution modes. ## Solution Added preprocessing pipeline to script execution in execute_script(): - Parse each statement in the script - Apply full preprocessing pipeline if statement has FROM clause - Fall back to original query if preprocessing fails - Preserve special row-iteration semantics for queries without FROM ## Implementation Modified src/non_interactive.rs execute_script(): - Check if statement has FROM clause - If yes: apply preprocessing pipeline, then format AST back to SQL - If no: preserve original behavior (special semantics) - Handle INTO clause removal after preprocessing Pipeline runs transformers in order: 1. ExpressionLifter 2. WhereAliasExpander 3. GroupByAliasExpander 4. HavingAliasTransformer 5. CTEHoister 6. InOperatorLifter ## New Reference File Added examples/expansion_transformers.sql: - Comprehensive reference showing all supported alias expansion features - Documents Quick Wins #1, #2, #3 - Shows working examples for each transformer - Documents future enhancements (CASE, BETWEEN, IN with aliases) - Includes implementation notes and testing commands - Can be run directly: sql-cli examples/expansion_transformers.sql ## Tests All tests passing: - 487 Rust unit tests - 397 integration tests - 511 Python tests - expansion_transformers.sql runs successfully with all features working ## Benefits - Scripts now have feature parity with query and interactive modes - Users can write cleaner SQL scripts with alias expansion - Example files demonstrate best practices - Consistent behavior across all execution modes 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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This is the first step in migrating to a DataTable/DataView architecture. The traits define the contract that the TUI will use to access data, allowing us to gradually replace the underlying implementation.