diff --git a/rdbms/cta_rdbms_class_diagram.svg b/rdbms/cta_rdbms_class_diagram.svg
index 8d716ee78085379c9b76db265f6204fbd44679f1..fe8b7e6f42842896777f685cc616a5b3c918b396 100644
--- a/rdbms/cta_rdbms_class_diagram.svg
+++ b/rdbms/cta_rdbms_class_diagram.svg
@@ -3,26 +3,26 @@
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-    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="506.822">+executeNonQuery()</text>
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+  <g>
+    <rect style="fill: #ffffff" x="-469.31" y="311.822" width="171.7" height="28"/>
+    <rect style="fill: none; fill-opacity:0; stroke-width: 4; stroke: #000000" x="-469.31" y="311.822" width="171.7" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="-383.46" y="330.822">Stmt</text>
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+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="377.822">+bindBool()</text>
+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="393.822">+bindDouble()</text>
+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="409.822">+bindString()</text>
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+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="457.822">+bindUint32()</text>
+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="473.822">+binUint64()</text>
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+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-465.31" y="505.822">+executeNonQuery()</text>
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-    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-379.46" y="524.822">1</text>
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+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="-383.394" y="543.512">Creates</text>
+    <polygon style="fill: #000000" points="-354.444,543.512 -354.444,535.512 -346.444,539.512 "/>
+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-379.46" y="523.822">1</text>
     <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-379.328" y="579.202">0..*</text>
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-    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="278.491" y="300.74">+getStmt()</text>
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+    <rect style="fill: none; fill-opacity:0; stroke-width: 4; stroke: #000000" x="274.49" y="250.74" width="92.7" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="320.84" y="269.74">StmtPool</text>
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+    <rect style="fill: none; fill-opacity:0; stroke-width: 4; stroke: #000000" x="274.49" y="278.74" width="92.7" height="8"/>
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+    <text font-size="12.8" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="278.49" y="300.74">+getStmt()</text>
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+    <rect style="fill: none; fill-opacity:0; stroke-width: 4; stroke: #000000" x="211.184" y="407.958" width="219.1" height="28"/>
+    <text font-size="16" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:700" x="320.734" y="426.958">wrapper::StmtWrapper</text>
+    <rect style="fill: #ffffff" x="211.184" y="435.958" width="219.1" height="8"/>
+    <rect style="fill: none; fill-opacity:0; stroke-width: 4; stroke: #000000" x="211.184" y="435.958" width="219.1" height="8"/>
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@@ -248,24 +248,24 @@
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-    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="-383.468" y="266.744">creates</text>
-    <polygon style="fill: #000000" points="-354.518,266.744 -354.518,258.744 -346.518,262.744 "/>
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+    <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:monospace;font-style:normal;font-weight:normal" x="-383.468" y="266.244">creates</text>
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+    <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:monospace;font-style:normal;font-weight:normal" x="-379.46" y="307.822">0..1</text>
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@@ -347,15 +347,15 @@
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-      <tspan x="37.1026" y="76.5814">At any single point in time a ConnAndStmt is</tspan>
-      <tspan x="37.1026" y="92.5814">exclusively owned by either a ConnPool or a Conn.</tspan>
-      <tspan x="37.1026" y="108.581">In other words a ConnAndStmt is loaned to a Conn.</tspan>
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+      <tspan x="37.6026" y="77.0814">At any single point in time a ConnAndStmt is</tspan>
+      <tspan x="37.6026" y="93.0814">exclusively owned by either a ConnPool or a Conn.</tspan>
+      <tspan x="37.6026" y="109.081">In other words a ConnAndStmt is loaned to a Conn.</tspan>
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