fix: describe statements in duckdb

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Benchmark for 685c468

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| Test | Base | PR | % | |------|--------------|------------------|---| | DepthMap::from_parent | 41.8±1.27µs | 41.7±0.65µs | -0.24% | | fix_complex_query | 11.8±0.55ms | **11.6±0.12ms** | **-1.69%** | | parse_complex_query | 2.9±0.03µs | 2.9±0.06µs | 0.00% | | parse_expression_recursion | 5.1±0.04µs | 5.1±0.07µs | 0.00% | | parse_simple_query | **814.1±48.28ns** | 848.6±32.39ns | **+4.24%** |

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Benchmark for b12c56f

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| Test | Base | PR | % | |------|--------------|------------------|---| | DepthMap::from_parent | **41.3±0.48µs** | 41.8±0.58µs | **+1.21%** | | fix_complex_query | 11.9±0.32ms | 11.7±0.41ms | -1.68% | | parse_complex_query | 2.9±0.04µs | 2.9±0.04µs | 0.00% | | parse_expression_recursion | **5.1±0.07µs** | 5.2±0.07µs | **+1.96%** | | parse_simple_query | 829.5±24.77ns | 835.3±11.16ns | +0.70% |