feat: improve error message when getting an invalid .data

[maelle]

Fix #127

Not docs but this was a low-hanging fruit to warm up. :wink:

[github-actions[bot]]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if cf2b613216f61ed022bc0abf327623d7c2d67395 is merged into main:

• :heavy_check_mark:001_tpch_01: 24.6ms -> 24.5ms [-4.31%, +3.47%]
• :heavy_check_mark:001_tpch_02: 128ms -> 128ms [-1.34%, +0.92%]
• :heavy_check_mark:001_tpch_03: 68.4ms -> 68.5ms [-1.7%, +2.16%]
• :heavy_check_mark:001_tpch_04: 24.8ms -> 24.5ms [-2.85%, +0.5%]
• :heavy_check_mark:001_tpch_05: 123ms -> 123ms [-1.91%, +1.24%]
• :heavy_check_mark:001_tpch_06: 15.4ms -> 15.4ms [-1.92%, +1.98%]
• :heavy_check_mark:001_tpch_07: 141ms -> 142ms [-0.54%, +1.44%]
• :heavy_check_mark:001_tpch_08: 161ms -> 160ms [-1.39%, +0.5%]
• :heavy_check_mark:001_tpch_09: 131ms -> 131ms [-1.37%, +0.52%]
• :heavy_check_mark:001_tpch_10: 77.2ms -> 77.7ms [-0.81%, +2.15%]
• :heavy_check_mark:001_tpch_11: 64.4ms -> 64.3ms [-2.26%, +1.98%]
• :heavy_check_mark:001_tpch_12: 29.2ms -> 29.3ms [-1.07%, +1.99%]
• :heavy_check_mark:001_tpch_13: 20.6ms -> 20.1ms [-4.62%, +0.45%]
• :heavy_check_mark:001_tpch_14: 21.7ms -> 22ms [-0.8%, +3.33%]
• :heavy_check_mark:001_tpch_15: 64.7ms -> 64.3ms [-2.53%, +1.13%]
• :heavy_check_mark:001_tpch_16: 66.2ms -> 65.9ms [-1.65%, +0.84%]
• :heavy_check_mark:001_tpch_17: 28.3ms -> 28.3ms [-3.01%, +2.96%]
• :heavy_check_mark:001_tpch_18: 23.6ms -> 23.7ms [-1.67%, +2.02%]
• :heavy_check_mark:001_tpch_19: 133ms -> 132ms [-1.9%, +0.97%]
• :heavy_check_mark:001_tpch_20: 80.1ms -> 80.1ms [-1.6%, +1.41%]
• :heavy_check_mark:001_tpch_21: 177ms -> 176ms [-1.92%, +0.4%]
• :heavy_check_mark:001_tpch_22: 128ms -> 128ms [-1.35%, +1.14%]
• :heavy_check_mark:010_tpch_01: 84.9ms -> 81.2ms [-8.82%, +0.28%]
• :heavy_check_mark:010_tpch_02: 74.1ms -> 73.8ms [-4.7%, +3.91%]
• :heavy_check_mark:010_tpch_03: 66.6ms -> 67.5ms [-0.23%, +2.91%]
• :heavy_check_mark:010_tpch_04: 49.6ms -> 49.9ms [-1.29%, +2.31%]
• :heavy_check_mark:010_tpch_05: 95.3ms -> 95.4ms [-1.1%, +1.25%]
• :heavy_check_mark:010_tpch_06: 37ms -> 36.7ms [-8.4%, +6.48%]
• :heavy_check_mark:010_tpch_07: 116ms -> 115ms [-3.28%, +0.24%]
• :heavy_check_mark:010_tpch_08: 136ms -> 135ms [-2.43%, +0.55%]
• :heavy_check_mark:010_tpch_09: 120ms -> 119ms [-2.2%, +1.33%]
• :heavy_check_mark:010_tpch_10: 85.1ms -> 84.6ms [-2.82%, +1.65%]
• :heavy_check_mark:010_tpch_11: 39.4ms -> 38.8ms [-4.16%, +1%]
• :heavy_check_mark:010_tpch_12: 64.1ms -> 63.6ms [-4.21%, +2.69%]
• :heavy_check_mark:010_tpch_13: 53.7ms -> 53.3ms [-3.18%, +1.69%]
• :heavy_check_mark:010_tpch_14: 43.5ms -> 43.3ms [-8.27%, +7.58%]
• :heavy_check_mark:010_tpch_15: 60.5ms -> 59.1ms [-7.95%, +3.12%]
• :heavy_check_mark:010_tpch_16: 45.5ms -> 45.4ms [-1.97%, +1.49%]
• :exclamation::snail:010_tpch_17: 55.5ms -> 56.5ms [+0.48%, +3.2%]
• :heavy_check_mark:010_tpch_18: 53.8ms -> 52.8ms [-8.1%, +4.52%]
• :heavy_check_mark:010_tpch_19: 125ms -> 125ms [-1.94%, +1.86%]
• :heavy_check_mark:010_tpch_20: 74.5ms -> 74.1ms [-4.97%, +3.83%]
• :heavy_check_mark:010_tpch_21: 413ms -> 414ms [-1.22%, +1.62%]
• :heavy_check_mark:010_tpch_22: 78.7ms -> 77.9ms [-3%, +0.95%]
• :heavy_check_mark:100_tpch_01: 1.21s -> 1.19s [-7.47%, +5.69%]
• :heavy_check_mark:100_tpch_02: 128ms -> 120ms [-12.16%, +0.49%]
• :heavy_check_mark:100_tpch_03: 1.07s -> 1.09s [-1.14%, +5.84%]
• :heavy_check_mark:100_tpch_04: 1.06s -> 1.05s [-2.75%, +2.41%]
• :heavy_check_mark:100_tpch_05: 1.16s -> 1.15s [-3.55%, +2.6%]
• :heavy_check_mark:100_tpch_06: 990ms -> 990ms [-1.26%, +1.11%]
• :rocket:100_tpch_07: 1.12s -> 1.11s [-1.69%, -0.34%]
• :rocket:100_tpch_08: 1.16s -> 1.14s [-2.63%, -0.59%]
• :heavy_check_mark:100_tpch_09: 1.22s -> 1.24s [-1.1%, +4.37%]
• :heavy_check_mark:100_tpch_10: 1.1s -> 1.1s [-1.87%, +1.86%]
• :heavy_check_mark:100_tpch_11: 84.2ms -> 85.3ms [-9.54%, +12.02%]
• :heavy_check_mark:100_tpch_12: 1.08s -> 1.09s [-3%, +4.39%]
• :heavy_check_mark:100_tpch_13: 323ms -> 312ms [-8.52%, +1.63%]
• :heavy_check_mark:100_tpch_14: 1.01s -> 1.01s [-2.45%, +3.47%]
• :heavy_check_mark:100_tpch_15: 1.11s -> 1.1s [-3.52%, +3.02%]
• :heavy_check_mark:100_tpch_16: 130ms -> 133ms [-17.99%, +23.5%]
• :heavy_check_mark:100_tpch_17: 1.05s -> 1.04s [-2.94%, +0.08%]
• :heavy_check_mark:100_tpch_18: 1.08s -> 1.08s [-1.88%, +1.26%]
• :heavy_check_mark:100_tpch_19: 1.19s -> 1.17s [-6.11%, +3.08%]
• :heavy_check_mark:100_tpch_20: 1.08s -> 1.07s [-4.36%, +2.57%]
• :heavy_check_mark:100_tpch_21: 2.2s -> 2.25s [-1.07%, +5.61%]
• :heavy_check_mark:100_tpch_22: 177ms -> 169ms [-10.33%, +1.75%]

Further explanation regarding interpretation and methodology can be found in the documentation.

[github-actions[bot]]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if e718a075bc84c42a58fe042e61861b8f34b1566e is merged into main:

• :heavy_check_mark:001_tpch_01: 24.5ms -> 25.3ms [-0.9%, +7.47%]
• :rocket:001_tpch_02: 133ms -> 130ms [-3.18%, -0.56%]
• :heavy_check_mark:001_tpch_03: 71.7ms -> 72.7ms [-1.03%, +3.89%]
• :exclamation::snail:001_tpch_04: 24.7ms -> 25.5ms [+0.15%, +6.21%]
• :heavy_check_mark:001_tpch_05: 122ms -> 122ms [-1.37%, +1.37%]
• :heavy_check_mark:001_tpch_06: 15.4ms -> 15.7ms [-1.26%, +5.15%]
• :heavy_check_mark:001_tpch_07: 149ms -> 148ms [-2.73%, +1.48%]
• :heavy_check_mark:001_tpch_08: 167ms -> 165ms [-2.82%, +0.86%]
• :heavy_check_mark:001_tpch_09: 139ms -> 138ms [-2.83%, +0.72%]
• :heavy_check_mark:001_tpch_10: 79.4ms -> 79.1ms [-3.09%, +2.37%]
• :heavy_check_mark:001_tpch_11: 66.3ms -> 66.4ms [-3.33%, +3.71%]
• :heavy_check_mark:001_tpch_12: 29.6ms -> 29.8ms [-1.46%, +2.74%]
• :heavy_check_mark:001_tpch_13: 21.1ms -> 21.1ms [-2.17%, +2.18%]
• :heavy_check_mark:001_tpch_14: 22ms -> 21.9ms [-2.89%, +1.43%]
• :exclamation::snail:001_tpch_15: 64.3ms -> 65.4ms [+0.02%, +3.37%]
• :heavy_check_mark:001_tpch_16: 66.4ms -> 67.4ms [-0.76%, +3.79%]
• :heavy_check_mark:001_tpch_17: 28ms -> 27.7ms [-3.22%, +1.07%]
• :heavy_check_mark:001_tpch_18: 23.5ms -> 24ms [-0.91%, +4.48%]
• :heavy_check_mark:001_tpch_19: 130ms -> 131ms [-0.43%, +1.71%]
• :heavy_check_mark:001_tpch_20: 79.4ms -> 79.4ms [-1.55%, +1.79%]
• :heavy_check_mark:001_tpch_21: 176ms -> 175ms [-1.81%, +1.38%]
• :heavy_check_mark:001_tpch_22: 125ms -> 125ms [-1.34%, +0.75%]
• :heavy_check_mark:010_tpch_01: 82.5ms -> 82.8ms [-3.17%, +3.86%]
• :heavy_check_mark:010_tpch_02: 70.9ms -> 71.7ms [-1.15%, +3.3%]
• :exclamation::snail:010_tpch_03: 66.5ms -> 67.6ms [+0.35%, +2.81%]
• :heavy_check_mark:010_tpch_04: 49.3ms -> 49.5ms [-1.37%, +1.9%]
• :heavy_check_mark:010_tpch_05: 95.4ms -> 95.8ms [-1.04%, +1.82%]
• :heavy_check_mark:010_tpch_06: 35.8ms -> 36.1ms [-5.21%, +6.88%]
• :heavy_check_mark:010_tpch_07: 119ms -> 119ms [-1.66%, +2.67%]
• :heavy_check_mark:010_tpch_08: 140ms -> 143ms [-0.96%, +4.69%]
• :heavy_check_mark:010_tpch_09: 124ms -> 122ms [-4.62%, +1.43%]
• :heavy_check_mark:010_tpch_10: 86.4ms -> 86.5ms [-4.71%, +4.88%]
• :heavy_check_mark:010_tpch_11: 39ms -> 38.2ms [-5.54%, +1.44%]
• :heavy_check_mark:010_tpch_12: 64.2ms -> 66.4ms [-3.81%, +10.72%]
• :heavy_check_mark:010_tpch_13: 52.8ms -> 52.9ms [-1.69%, +2.01%]
• :heavy_check_mark:010_tpch_14: 43.4ms -> 44ms [-1.92%, +5.02%]
• :heavy_check_mark:010_tpch_15: 58.4ms -> 61.6ms [-2.42%, +13.46%]
• :heavy_check_mark:010_tpch_16: 46.9ms -> 47.1ms [-2%, +2.72%]
• :heavy_check_mark:010_tpch_17: 58.5ms -> 58.2ms [-2.59%, +1.88%]
• :heavy_check_mark:010_tpch_18: 56.1ms -> 57.2ms [-4.85%, +8.74%]
• :heavy_check_mark:010_tpch_19: 124ms -> 124ms [-1.32%, +2.14%]
• :heavy_check_mark:010_tpch_20: 75.1ms -> 74.6ms [-2.68%, +1.26%]
• :heavy_check_mark:010_tpch_21: 431ms -> 429ms [-2.4%, +1.54%]
• :heavy_check_mark:010_tpch_22: 79ms -> 78.3ms [-3.57%, +1.73%]
• :heavy_check_mark:100_tpch_01: 1.19s -> 1.23s [-1.09%, +7.44%]
• :heavy_check_mark:100_tpch_02: 123ms -> 126ms [-9.65%, +15.04%]
• :heavy_check_mark:100_tpch_03: 1.1s -> 1.08s [-4.71%, +0.34%]
• :heavy_check_mark:100_tpch_04: 1.12s -> 1.06s [-13.86%, +3.16%]
• :heavy_check_mark:100_tpch_05: 1.18s -> 1.18s [-1.52%, +1.11%]
• :heavy_check_mark:100_tpch_06: 1.01s -> 1s [-2.61%, +0.97%]
• :heavy_check_mark:100_tpch_07: 1.16s -> 1.15s [-6.36%, +3.46%]
• :heavy_check_mark:100_tpch_08: 1.16s -> 1.15s [-3.61%, +2.61%]
• :heavy_check_mark:100_tpch_09: 1.26s -> 1.22s [-7.55%, +1.72%]
• :heavy_check_mark:100_tpch_10: 1.14s -> 1.13s [-4.22%, +3.55%]
• :heavy_check_mark:100_tpch_11: 84.2ms -> 83.5ms [-7.78%, +6.2%]
• :heavy_check_mark:100_tpch_12: 1.11s -> 1.1s [-1.38%, +0.59%]
• :heavy_check_mark:100_tpch_13: 333ms -> 349ms [-4.73%, +14.85%]
• :heavy_check_mark:100_tpch_14: 1.03s -> 1.06s [-2.15%, +9%]
• :heavy_check_mark:100_tpch_15: 1.13s -> 1.15s [-0.76%, +4.13%]
• :heavy_check_mark:100_tpch_16: 125ms -> 124ms [-7.03%, +6.75%]
• :heavy_check_mark:100_tpch_17: 1.08s -> 1.08s [-3.6%, +4.35%]
• :heavy_check_mark:100_tpch_18: 1.12s -> 1.11s [-4.1%, +3.08%]
• :heavy_check_mark:100_tpch_19: 1.2s -> 1.21s [-2.7%, +4.41%]
• :heavy_check_mark:100_tpch_20: 1.08s -> 1.1s [-1.71%, +4.9%]
• :heavy_check_mark:100_tpch_21: 2.25s -> 2.28s [-6.3%, +9.15%]
• :heavy_check_mark:100_tpch_22: 175ms -> 180ms [-7.67%, +13.3%]

Further explanation regarding interpretation and methodology can be found in the documentation.