assets/mvcc-implementation.svg

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align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 70px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">(0,2)</div></div></div></foreignObject><text x="65" y="74" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">(0,2)</text></switch></g><rect x="245" y="40" width="160" height="40" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe flex-start; width: 1px; height: 1px; padding-top: 60px; margin-left: 247px;"><div style="box-sizing: border-box; font-size: 0; text-align: left; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>INSERT INTO tbl(col)</div><div>VALUES ('a'), ('b');</div></div></div></div></foreignObject><text x="247" y="64" fill="#000000" font-family="Courier New" font-size="12px" font-weight="bold">INSERT INTO tbl(col)...</text></switch></g><rect x="90" y="40" width="40" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 50px; 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text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="110" y="194" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="130" y="160" width="40" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 170px; margin-left: 150px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="150" y="174" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="130" y="180" width="40" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 190px; margin-left: 150px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="150" y="194" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="170" y="160" width="30" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 170px; margin-left: 185px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">a</div></div></div></foreignObject><text x="185" y="174" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">a</text></switch></g><rect x="170" y="180" width="30" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 190px; margin-left: 185px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">b</div></div></div></foreignObject><text x="185" y="194" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">b</text></switch></g><rect x="40" y="140" width="50" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 150px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">ctid</div></div></div></foreignObject><text x="65" y="154" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">ctid</text></switch></g><rect x="165" y="140" width="40" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 150px; margin-left: 185px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">col</div></div></div></foreignObject><text x="185" y="154" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">col</text></switch></g><rect x="280" y="140" width="90" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 150px; margin-left: 325px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 10px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">Not visible</div></div></div></foreignObject><text x="325" y="153" fill="#000000" font-family="Courier New" font-size="10px" text-anchor="middle" font-weight="bold">Not visible</text></switch></g><path d="M 199.64 170.26 L 273.83 151.56" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 278.92 150.27 L 272.98 155.38 L 273.83 151.56 L 271.27 148.59 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 40 360 L 40.3 279.94" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 200 360 L 200 280" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 40 280 L 200.15 280.4" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 40 300 L 199.7 300.16" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 40 320 L 199.94 319.24" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 90 340 L 89.77 280" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 170 340 L 169.77 280" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 130 340 L 129.77 280" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><rect x="40" y="280" width="50" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 290px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">(0,1)</div></div></div></foreignObject><text x="65" y="294" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">(0,1)</text></switch></g><rect x="40" y="300" width="50" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 310px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">(0,2)</div></div></div></foreignObject><text x="65" y="314" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">(0,2)</text></switch></g><rect x="260" y="280" width="130" height="50" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe flex-start; width: 1px; height: 1px; padding-top: 305px; margin-left: 262px;"><div style="box-sizing: border-box; font-size: 0; text-align: left; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div align="left">UPDATE tbl</div><div align="left">SET col = 'c'</div><div align="left">WHERE col = 'b';</div></div></div></div></foreignObject><text x="262" y="309" fill="#000000" font-family="Courier New" font-size="12px" font-weight="bold">UPDATE tbl...</text></switch></g><rect x="90" y="280" width="40" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 290px; margin-left: 110px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="110" y="294" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="90" y="300" width="40" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 310px; margin-left: 110px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="110" y="314" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="130" y="280" width="40" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 290px; margin-left: 150px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="150" y="294" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="130" y="300" width="40" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 310px; margin-left: 150px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; "><div>...</div></div></div></div></foreignObject><text x="150" y="314" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">...</text></switch></g><rect x="170" y="280" width="30" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 290px; margin-left: 185px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">a</div></div></div></foreignObject><text x="185" y="294" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">a</text></switch></g><rect x="170" y="300" width="30" height="20" fill="#fad7ac" stroke="#b46504" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 310px; margin-left: 185px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">b</div></div></div></foreignObject><text x="185" y="314" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">b</text></switch></g><rect x="40" y="260" width="50" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 270px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">ctid</div></div></div></foreignObject><text x="65" y="274" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">ctid</text></switch></g><rect x="165" y="260" width="40" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 270px; margin-left: 185px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">col</div></div></div></foreignObject><text x="185" y="274" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">col</text></switch></g><rect x="280" y="260" width="90" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 270px; margin-left: 325px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 10px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">Not visible</div></div></div></foreignObject><text x="325" y="273" fill="#000000" font-family="Courier New" font-size="10px" text-anchor="middle" font-weight="bold">Not visible</text></switch></g><path d="M 199.64 290.26 L 273.83 271.56" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 278.92 270.27 L 272.98 275.38 L 273.83 271.56 L 271.27 268.59 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 199.91 310.26 L 272.98 272.9" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 277.65 270.51 L 273.02 276.81 L 272.98 272.9 L 269.83 270.58 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 40 340 L 199.94 339.24" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><rect x="40" y="320" width="50" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 330px; margin-left: 65px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Courier New; color: #000000; line-height: 1.2; pointer-events: all; font-weight: bold; white-space: nowrap; ">(0,3)</div></div></div></foreignObject><text x="65" y="334" fill="#000000" font-family="Courier New" font-size="12px" text-anchor="middle" font-weight="bold">(0,3)</text></switch></g><rect x="90" y="320" width="40" height="20" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; 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