Use descriptive semantic names

Names should accurately reflect their purpose, behavior, and semantic meaning to avoid confusion and improve code readability. Avoid misleading names that don’t match the actual functionality or content.

Key principles:

• Function names should match their actual behavior (e.g., projectCorrelatedColumns when called with non-correlated data should be renamed to reflect what it actually does)
• Variable names should be specific and unambiguous (e.g., cached_reader is misleading when it specifically refers to CachedInMemoryReadBufferFromFile - use page_cache_reader instead)
• Parameter names should clearly indicate their role (e.g., column_idx should be presence_column_idx if it’s specifically the index of a presence column)
• Avoid abbreviations that sacrifice clarity (e.g., use storage or table instead of tbl)
• Method names should indicate what they return or do (e.g., getHivePart() should be split into separate methods if it also performs normalization)

Example of improvement:

// Before: misleading name
void projectCorrelatedColumns(rhs_plan, ...);  // but no correlation involved

// After: accurate name  
void projectIdentifierColumns(rhs_plan, ...);  // clearly indicates projecting from identifiers

// Before: ambiguous variable
auto * cached_reader = typeid_cast<CachedInMemoryReadBufferFromFile *>(&reader);

// After: specific variable
auto * page_cache_reader = typeid_cast<CachedInMemoryReadBufferFromFile *>(&reader);

This ensures that code is self-documenting and reduces cognitive load when reading and maintaining the codebase.