Support mapping jsonpath (#3334)

Closes #3044

Author: roji

src/EFCore.PG/Storage/Internal/NpgsqlTypeMappingSource.cs

@@ -84,6 +84,7 @@ static NpgsqlTypeMappingSource()
     private readonly NpgsqlCharacterCharTypeMapping _singleChar = new("character(1)");
     private readonly NpgsqlStringTypeMapping _xml = new("xml", NpgsqlDbType.Xml);
     private readonly NpgsqlStringTypeMapping _citext = new("citext", NpgsqlDbType.Citext);
+    private readonly NpgsqlStringTypeMapping _jsonpath = new("jsonpath", NpgsqlDbType.JsonPath);
 
     // JSON mappings - EF owned entity support
     private readonly NpgsqlOwnedJsonTypeMapping _jsonbOwned = new("jsonb");
@@ -234,6 +235,7 @@ public NpgsqlTypeMappingSource(
             { "text", [_text] },
             { "jsonb", [_jsonbString, _jsonbDocument, _jsonbElement] },
             { "json", [_jsonString, _jsonDocument, _jsonElement] },
+            { "jsonpath", [_jsonpath] },
             { "xml", [_xml] },
             { "citext", [_citext] },
             { "character varying", [_varchar] },

test/EFCore.PG.Tests/Storage/NpgsqlTypeMappingSourceTest.cs

@@ -41,6 +41,7 @@ public class NpgsqlTypeMappingSourceTest
     [InlineData("geometry(POLYGONM)", typeof(Polygon), null, null, null, false)]
     [InlineData("xid", typeof(uint), null, null, null, false)]
     [InlineData("xid8", typeof(ulong), null, null, null, false)]
+    [InlineData("jsonpath", typeof(string), null, null, null, false)]
     public void By_StoreType(string typeName, Type type, int? size, int? precision, int? scale, bool fixedLength)
     {
         var mapping = CreateTypeMappingSource().FindMapping(typeName);