Fix JetStringMethodTranslator

JetStringMethodTranslator: Merge left 2 copies of some functions around

src/EFCore.Jet/Query/ExpressionTranslators/Internal/JetStringMethodTranslator.cs

@@ -485,101 +485,5 @@ namespace EntityFrameworkCore.Jet.Query.ExpressionTranslators.Internal
 
             return builder.ToString();
         }
-
-        private SqlExpression TranslateStartsEndsWith(SqlExpression instance, SqlExpression pattern, bool startsWith)
-        {
-            var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, pattern);
-
-            instance = _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping);
-            pattern = _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping);
-
-            if (pattern is SqlConstantExpression constantExpression)
-            {
-                // The pattern is constant. Aside from null or empty, we escape all special characters (%, _, \)
-                // in C# and send a simple LIKE
-                if (!(constantExpression.Value is string patternValue))
-                {
-                    return _sqlExpressionFactory.Like(
-                        instance,
-                        _sqlExpressionFactory.Constant(null, stringTypeMapping));
-                }
-
-                return patternValue.Any(IsLikeWildChar)
-                    ? _sqlExpressionFactory.Like(
-                        instance,
-                        _sqlExpressionFactory.Constant(
-                            startsWith
-                                ? EscapeLikePattern(patternValue) + '%'
-                                : '%' + EscapeLikePattern(patternValue)),
-                        _sqlExpressionFactory.Constant(LikeEscapeString))
-                    : _sqlExpressionFactory.Like(
-                        instance,
-                        _sqlExpressionFactory.Constant(startsWith ? patternValue + '%' : '%' + patternValue));
-            }
-
-            // The pattern is non-constant, we use LEFT or RIGHT to extract substring and compare.
-            if (startsWith)
-            {
-                return _sqlExpressionFactory.Equal(
-                    _sqlExpressionFactory.Function(
-                        "LEFT",
-                        new[]
-                        {
-                            instance,
-                            _sqlExpressionFactory.Function(
-                                "LEN",
-                                new[] { pattern },
-                                nullable: true,
-                                argumentsPropagateNullability: new[] { true },
-                                typeof(int))
-                        },
-                        nullable: true,
-                        argumentsPropagateNullability: new[] { true, true },
-                        typeof(string),
-                        stringTypeMapping),
-                    pattern);
-            }
-
-            return _sqlExpressionFactory.Equal(
-                _sqlExpressionFactory.Function(
-                    "RIGHT",
-                    new[]
-                    {
-                        instance,
-                        _sqlExpressionFactory.Function(
-                            "LEN",
-                            new[] { pattern },
-                            nullable: true,
-                            argumentsPropagateNullability: new[] { true },
-                            typeof(int))
-                    },
-                    nullable: true,
-                    argumentsPropagateNullability: new[] { true, true },
-                    typeof(string),
-                    stringTypeMapping),
-                pattern);
-        }
-
-        // See https://docs.microsoft.com/en-us/sql/t-sql/language-elements/like-transact-sql
-        private bool IsLikeWildChar(char c)
-            => c == '%' || c == '_' || c == '[';
-
-        private string EscapeLikePattern(string pattern)
-        {
-            var builder = new StringBuilder();
-            for (var i = 0; i < pattern.Length; i++)
-            {
-                var c = pattern[i];
-                if (IsLikeWildChar(c)
-                    || c == LikeEscapeChar)
-                {
-                    builder.Append(LikeEscapeChar);
-                }
-
-                builder.Append(c);
-            }
-
-            return builder.ToString();
-        }
     }
 }