Labels:text | screenshot | diagram | parallel | line | number | rectangle OCR: Table 10 million 200 byte rows 16 rows per 32k byte block; 62,500 blocks Query How many professional married female sailors? Rows selected 2,500 70,000 62,500 62,512 60,000 50,000 40,000 30,000 Blocks touched 20,000 10,000 22,650 160 ajbuis fue lo uanup upos Full-table scar bitinap indexes Query resolved on conventional index of four bitmap indexes Stan driver by intersection FIGURE 1. Bitmaps reduce database IO by a factor of over 400 in one case.
