[BUG5][BUG6] Escape DELETE sqlLine + quote UPDATE idents + 0.9.2-beta

BUG5: GenerateDeleteMethod built sqlLine with literal " characters
(BUG3 fix added them) and embedded the result inside a C# verbatim
string @"...". A literal " inside @"..." closes the literal, so the
generated .g.cs failed to compile (CS1022). Fix: pre-compute
sqlLineVerbatim = sqlLine.Replace("\"", "\"\"") and interpolate
that into both NpgsqlConnection + Transaction overloads.

BUG6: GenerateUpdateMethod was missed by the BUG3 sweep entirely.
The setClauses, whereClauses, and the `UPDATE {schema}.{name}`
template were emitted bare. PostgreSQL folded mixed-case names
(fhir_Patient -> fhir_patient) and the statement failed at runtime.
Fix: quote every identifier in the UPDATE codegen using the `""`
verbatim escape form (matches the INSERT path), in both
NpgsqlConnection + Transaction overloads.

Verified locally:
- repro: GenerateUpdate=true, GenerateDelete=true on fhir_Patient
- generated UPDATE: UPDATE "public"."fhir_Patient" SET "Active" = @Active WHERE "Id" = @id
- generated DELETE: DELETE FROM "public"."fhir_Patient" WHERE "Id" = @id
- compile-tested .g.cs as a class library: 0 errors, 0 warnings.

Bump Directory.Build.props to 0.9.2-beta.

Author: MelbourneDeveloper

DataProvider/DataProvider/PostgresCli.cs

@@ -1012,8 +1012,19 @@ string pascalName
         var allParams = pkCols.Concat(updateable).ToList();
         var parameters = string.Join(", ", allParams.Select(c => $"{c.CSharpType} {c.Name}"));
 
-        var setClauses = string.Join(", ", updateable.Select(c => $"{c.Name} = @{c.Name}"));
-        var whereClauses = string.Join(" AND ", pkCols.Select(c => $"{c.Name} = @{c.Name}"));
+        // BUG6 fix: quote SET + WHERE column idents in UPDATE codegen so
+        // mixed-case columns (Active, ChapterNumber) survive PG case-folding.
+        // Same reasoning as BUG3 INSERT/DELETE quoting. The strings are
+        // embedded in a C# verbatim string `@"..."` so use the `""` escape
+        // form (two double-quotes inside @"..." represent a single literal ").
+        var setClauses = string.Join(
+            ", ",
+            updateable.Select(c => $"\"\"{c.Name}\"\" = @{c.Name}")
+        );
+        var whereClauses = string.Join(
+            " AND ",
+            pkCols.Select(c => $"\"\"{c.Name}\"\" = @{c.Name}")
+        );
 
         // NpgsqlConnection overload
         _ = sb.AppendLine();
@@ -1031,9 +1042,11 @@ string pascalName
         _ = sb.AppendLine(CultureInfo.InvariantCulture, $"        {parameters})");
         _ = sb.AppendLine("    {");
         _ = sb.AppendLine("        const string sql = @\"");
+        // BUG6 fix: quote schema + table in UPDATE so mixed-case fhir_Patient
+        // round-trips through PG. Verbatim string -> use `""` escape form.
         _ = sb.AppendLine(
             CultureInfo.InvariantCulture,
-            $"            UPDATE {table.Schema}.{table.Name}"
+            $"            UPDATE \"\"{table.Schema}\"\".\"\"{table.Name}\"\""
         );
         _ = sb.AppendLine(CultureInfo.InvariantCulture, $"            SET {setClauses}");
         _ = sb.AppendLine(CultureInfo.InvariantCulture, $"            WHERE {whereClauses}\";");
@@ -1072,9 +1085,10 @@ string pascalName
         _ = sb.AppendLine(CultureInfo.InvariantCulture, $"        {parameters})");
         _ = sb.AppendLine("    {");
         _ = sb.AppendLine("        const string sql = @\"");
+        // BUG6 fix: same UPDATE quoting in transaction overload.
         _ = sb.AppendLine(
             CultureInfo.InvariantCulture,
-            $"            UPDATE {table.Schema}.{table.Name}"
+            $"            UPDATE \"\"{table.Schema}\"\".\"\"{table.Name}\"\""
         );
         _ = sb.AppendLine(CultureInfo.InvariantCulture, $"            SET {setClauses}");
         _ = sb.AppendLine(CultureInfo.InvariantCulture, $"            WHERE {whereClauses}\";");
@@ -1146,11 +1160,16 @@ string pascalName
             return;
 
         var parameters = string.Join(", ", pkCols.Select(c => $"{c.CSharpType} {c.Name}"));
-        // BUG3 fix: quote WHERE-clause column idents + table name. sqlLine
-        // here is the raw SQL sent to PG (not embedded in a C# verbatim
-        // string), so write literal `"` characters directly.
+        // BUG3 fix: quote WHERE-clause column idents + table name so mixed-case
+        // tables/columns survive PG case-folding.
         var whereClauses = string.Join(" AND ", pkCols.Select(c => $"\"{c.Name}\" = @{c.Name}"));
         var sqlLine = $"DELETE FROM \"{table.Schema}\".\"{table.Name}\" WHERE {whereClauses}";
+        // BUG5 fix: sqlLine now contains literal `"` characters from BUG3 fix
+        // and gets embedded in a C# verbatim string `@"..."`. Inside @"...",
+        // a single `"` closes the literal. Escape every `"` to `""` for the
+        // verbatim form, otherwise the generated .g.cs is uncompilable
+        // (CS1022 unexpected token / CS1003 syntax error / CS1010 newline).
+        var sqlLineVerbatim = sqlLine.Replace("\"", "\"\"", StringComparison.Ordinal);
 
         // NpgsqlConnection overload
         _ = sb.AppendLine();
@@ -1169,7 +1188,7 @@ string pascalName
         _ = sb.AppendLine("    {");
         _ = sb.AppendLine(
             CultureInfo.InvariantCulture,
-            $"        const string sql = @\"{sqlLine}\";"
+            $"        const string sql = @\"{sqlLineVerbatim}\";"
         );
         _ = sb.AppendLine();
         _ = sb.AppendLine("        try");
@@ -1207,7 +1226,7 @@ string pascalName
         _ = sb.AppendLine("    {");
         _ = sb.AppendLine(
             CultureInfo.InvariantCulture,
-            $"        const string sql = @\"{sqlLine}\";"
+            $"        const string sql = @\"{sqlLineVerbatim}\";"
         );
         _ = sb.AppendLine();
         _ = sb.AppendLine("        if (transaction.Connection is not NpgsqlConnection conn)");

Directory.Build.props

@@ -4,7 +4,7 @@
     <NuGetAudit>false</NuGetAudit>
     <NuGetAuditMode>disabled</NuGetAuditMode>
     <RestoreAuditProperties>false</RestoreAuditProperties>
-    <Version>0.9.1-beta</Version>
+    <Version>0.9.2-beta</Version>
     <Authors>ChristianFindlay</Authors>
     <Company>MelbourneDeveloper</Company>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>