Premiere commit - Omika

tools/Omika.HfSqlProbe/SqlIdentifierValidator.cs

@@ -0,0 +1,21 @@
+using System.Text.RegularExpressions;
+
+namespace Omika.HfSqlProbe;
+
+internal static partial class SqlIdentifierValidator
+{
+    /// <summary>Accepts only letters, digits, and underscores.</summary>
+    [GeneratedRegex(@"\A[A-Za-z_][A-Za-z0-9_]*\z")]
+    private static partial Regex IdentifierPattern();
+
+    public static bool IsValid(string name) => IdentifierPattern().IsMatch(name);
+
+    /// <summary>Validates and returns the identifier, or throws on invalid input.</summary>
+    public static string Validate(string name)
+    {
+        if (!IsValid(name))
+            throw new ArgumentException(
+                $"Invalid SQL identifier: '{name}'. Only [A-Za-z0-9_] allowed.");
+        return name;
+    }
+}