Improve comparison predicate logic

Replace existing Value.cmp(), with the full rules layed out by ISO/IEC 9075-2:2016(E), 8.2, <comparison predicate> SQL Standard E011-06
elliotchance · Oct 18, 2023 · 7f6dba4 · 7f6dba4
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diff --git a/docs/sql-compliance.rst b/docs/sql-compliance.rst
@@ -13,7 +13,7 @@ Mandatory Features
 ------------------
 
 As of the latest version (or at least the version of this documentation)
-**vsql supports 59 of the 164 mandatory features** of the
+**vsql supports 60 of the 164 mandatory features** of the
 `SQL:2016 Standard <https://www.iso.org/standard/63556.html>`_.
 
 .. list-table:: Table 43 — Feature taxonomy and definition for mandatory features
@@ -40,7 +40,7 @@ As of the latest version (or at least the version of this documentation)
    * - ✅ E011-05
      - Numeric comparison
 
-   * - ❌ E011-06
+   * - ✅ E011-06
      - Implicit casting among the numeric data types
 
    * - ⭕ **E021**