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Change initialisation of SQL converters
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‎SQLiteSharp/SqlBuilder.cs‎

Lines changed: 73 additions & 71 deletions
Original file line numberDiff line numberDiff line change
@@ -23,11 +23,11 @@ namespace SQLiteSharp;
2323
/// <summary>
2424
/// Functions to convert CLR methods to SQL expressions.
2525
/// </summary>
26-
public Dictionary<MethodInfo, Func<MethodCallExpression, ParameterExpression, string>> MethodToSqlConverters { get; } = [];
26+
public Dictionary<MethodInfo, Func<MethodCallExpression, ParameterExpression, string>> MethodToSqlConverters { get; }
2727
/// <summary>
2828
/// Functions to convert CLR properties/fields to SQL expressions.
2929
/// </summary>
30-
public Dictionary<MemberInfo, Func<MemberExpression, ParameterExpression, string>> MemberToSqlConverters { get; } = [];
30+
public Dictionary<MemberInfo, Func<MemberExpression, ParameterExpression, string>> MemberToSqlConverters { get; }
3131

3232
private readonly List<string> SelectList = [];
3333
private readonly List<string> OrderByList = [];
@@ -45,7 +45,8 @@ namespace SQLiteSharp;
4545
internal SqlBuilder(SqliteTable<T> table) {
4646
Table = table;
4747

48-
AddDefaultSqlConverters();
48+
MethodToSqlConverters = GetDefaultMethodToSqlConverters();
49+
MemberToSqlConverters = GetDefaultMemberToSqlConverters();
4950
}
5051

5152
/// <summary>
@@ -467,208 +468,209 @@ private string ConvertMethodCallToSql(MethodCallExpression methodCallExpression,
467468
// Method call not recognised
468469
return AddParameter(methodCallExpression.Execute());
469470
}
470-
private void AddDefaultSqlConverters() {
471+
private Dictionary<MethodInfo, Func<MethodCallExpression, ParameterExpression, string>> GetDefaultMethodToSqlConverters() => new() {
471472
// string.Equals(string, string)
472-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Equals), [typeof(string), typeof(string)])!, (methodCall, rowExpression) => {
473+
[typeof(string).GetMethod(nameof(string.Equals), [typeof(string), typeof(string)])!] = (methodCall, rowExpression) => {
473474
string str1Sql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
474475
string str2Sql = ExpressionToSql(methodCall.Arguments[1], rowExpression);
475476
return $"{str1Sql} = {str2Sql}";
476-
});
477+
},
477478

478479
// string.Equals(string)
479-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Equals), [typeof(string)])!, (methodCall, rowExpression) => {
480+
[typeof(string).GetMethod(nameof(string.Equals), [typeof(string)])!] = (methodCall, rowExpression) => {
480481
string str1Sql = ExpressionToSql(methodCall.Object!, rowExpression);
481482
string str2Sql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
482483
return $"{str1Sql} = {str2Sql}";
483-
});
484+
},
484485

485486
// string.Equals(string, string, StringComparison)
486-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Equals), [typeof(string), typeof(string), typeof(StringComparison)])!, (methodCall, rowExpression) => {
487+
[typeof(string).GetMethod(nameof(string.Equals), [typeof(string), typeof(string), typeof(StringComparison)])!] = (methodCall, rowExpression) => {
487488
string str1Sql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
488489
string str2Sql = ExpressionToSql(methodCall.Arguments[1], rowExpression);
489490
StringComparison strComparison = (StringComparison)methodCall.Arguments[2].Execute()!;
490491
return $"{str1Sql} = {str2Sql} collate {StringComparisonToCollation(strComparison).SqlQuote()}";
491-
});
492+
},
492493

493494
// string.Equals(string, StringComparison)
494-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Equals), [typeof(string), typeof(StringComparison)])!, (methodCall, rowExpression) => {
495+
[typeof(string).GetMethod(nameof(string.Equals), [typeof(string), typeof(StringComparison)])!] = (methodCall, rowExpression) => {
495496
string str1Sql = ExpressionToSql(methodCall.Object!, rowExpression);
496497
string str2Sql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
497498
StringComparison strComparison = (StringComparison)methodCall.Arguments[1].Execute()!;
498499
return $"{str1Sql} = {str2Sql} collate {StringComparisonToCollation(strComparison).SqlQuote()}";
499-
});
500+
},
500501

501502
// string.Contains(string)
502-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Contains), [typeof(string)])!, (methodCall, rowExpression) => {
503+
[typeof(string).GetMethod(nameof(string.Contains), [typeof(string)])!] = (methodCall, rowExpression) => {
503504
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
504505
string? subStr = (string?)methodCall.Arguments[0].Execute();
505506
return $"{strSql} like {AddParameter("%" + subStr + "%")} escape '\\'";
506-
});
507+
},
507508

508509
// string.StartsWith(string)
509-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.StartsWith), [typeof(string)])!, (methodCall, rowExpression) => {
510+
[typeof(string).GetMethod(nameof(string.StartsWith), [typeof(string)])!] = (methodCall, rowExpression) => {
510511
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
511512
string? subStr = (string?)methodCall.Arguments[0].Execute();
512513
return $"{strSql} like {AddParameter(subStr + "%")} escape '\\'";
513-
});
514+
},
514515

515516
// string.EndsWith(string)
516-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.EndsWith), [typeof(string)])!, (methodCall, rowExpression) => {
517+
[typeof(string).GetMethod(nameof(string.EndsWith), [typeof(string)])!] = (methodCall, rowExpression) => {
517518
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
518519
string? subStr = (string?)methodCall.Arguments[0].Execute();
519520
return $"{strSql} like {AddParameter("%" + subStr)} escape '\\'";
520-
});
521+
},
521522

522523
// string.Replace(string, string)
523-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Replace), [typeof(string), typeof(string)])!, (methodCall, rowExpression) => {
524+
[typeof(string).GetMethod(nameof(string.Replace), [typeof(string), typeof(string)])!] = (methodCall, rowExpression) => {
524525
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
525526
string oldSubStrSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
526527
string newSubStrSql = ExpressionToSql(methodCall.Arguments[1], rowExpression);
527528
return $"replace({strSql}, {oldSubStrSql}, {newSubStrSql})";
528-
});
529+
},
529530

530531
// string.Substring(int, int)
531-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Substring), [typeof(int), typeof(int)])!, (methodCall, rowExpression) => {
532+
[typeof(string).GetMethod(nameof(string.Substring), [typeof(int), typeof(int)])!] = (methodCall, rowExpression) => {
532533
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
533534
string startIndexSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
534535
string lengthSql = ExpressionToSql(methodCall.Arguments[1], rowExpression);
535536
return $"substr({strSql}, {startIndexSql}, {lengthSql})";
536-
});
537+
},
537538

538539
// string.Substring(int)
539-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Substring), [typeof(int)])!, (methodCall, rowExpression) => {
540+
[typeof(string).GetMethod(nameof(string.Substring), [typeof(int)])!] = (methodCall, rowExpression) => {
540541
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
541542
string startIndexSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
542543
return $"substr({strSql}, {startIndexSql})";
543-
});
544-
545-
// string.Length
546-
MemberToSqlConverters.Add(typeof(string).GetProperty(nameof(string.Length))!, (member, rowExpression) => {
547-
string strSql = ExpressionToSql(member.Expression!, rowExpression);
548-
return $"length({strSql})";
549-
});
544+
},
550545

551546
// string.ToLower()
552-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.ToLower), [])!, (methodCall, rowExpression) => {
547+
[typeof(string).GetMethod(nameof(string.ToLower), [])!] = (methodCall, rowExpression) => {
553548
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
554549
return $"lower({strSql})";
555-
});
550+
},
556551

557552
// string.ToUpper()
558-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.ToUpper), [])!, (methodCall, rowExpression) => {
553+
[typeof(string).GetMethod(nameof(string.ToUpper), [])!] = (methodCall, rowExpression) => {
559554
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
560555
return $"upper({strSql})";
561-
});
556+
},
562557

563558
// string.IsNullOrEmpty(string)
564-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.IsNullOrEmpty), [typeof(string)])!, (methodCall, rowExpression) => {
559+
[typeof(string).GetMethod(nameof(string.IsNullOrEmpty), [typeof(string)])!] = (methodCall, rowExpression) => {
565560
string strSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
566561
return $"({strSql} is null or {strSql} = '')";
567-
});
562+
},
568563

569564
// string.Trim()
570-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.Trim), [])!, (methodCall, rowExpression) => {
565+
[typeof(string).GetMethod(nameof(string.Trim), [])!] = (methodCall, rowExpression) => {
571566
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
572567
return $"trim({strSql})";
573-
});
568+
},
574569

575570
// string.TrimStart()
576-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.TrimStart), [])!, (methodCall, rowExpression) => {
571+
[typeof(string).GetMethod(nameof(string.TrimStart), [])!] = (methodCall, rowExpression) => {
577572
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
578573
return $"ltrim({strSql})";
579-
});
574+
},
580575

581576
// string.TrimEnd()
582-
MethodToSqlConverters.Add(typeof(string).GetMethod(nameof(string.TrimEnd), [])!, (methodCall, rowExpression) => {
577+
[typeof(string).GetMethod(nameof(string.TrimEnd), [])!] = (methodCall, rowExpression) => {
583578
string strSql = ExpressionToSql(methodCall.Object!, rowExpression);
584579
return $"rtrim({strSql})";
585-
});
580+
},
586581

587582
// Math.Abs(double)
588-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Abs), [typeof(double)])!, (methodCall, rowExpression) => {
583+
[typeof(Math).GetMethod(nameof(Math.Abs), [typeof(double)])!] = (methodCall, rowExpression) => {
589584
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
590585
return $"abs({valueSql})";
591-
});
586+
},
592587

593588
// Math.Round(double)
594-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Round), [typeof(double)])!, (methodCall, rowExpression) => {
589+
[typeof(Math).GetMethod(nameof(Math.Round), [typeof(double)])!] = (methodCall, rowExpression) => {
595590
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
596591
return $"round({valueSql})";
597-
});
592+
},
598593

599594
// Math.Ceiling(double)
600-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Ceiling), [typeof(double)])!, (methodCall, rowExpression) => {
595+
[typeof(Math).GetMethod(nameof(Math.Ceiling), [typeof(double)])!] = (methodCall, rowExpression) => {
601596
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
602597
return $"ceil({valueSql})";
603-
});
598+
},
604599

605600
// Math.Floor(double)
606-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Floor), [typeof(double)])!, (methodCall, rowExpression) => {
601+
[typeof(Math).GetMethod(nameof(Math.Floor), [typeof(double)])!] = (methodCall, rowExpression) => {
607602
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
608603
return $"floor({valueSql})";
609-
});
604+
},
610605

611606
// Math.Exp(double)
612-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Exp), [typeof(double)])!, (methodCall, rowExpression) => {
607+
[typeof(Math).GetMethod(nameof(Math.Exp), [typeof(double)])!] = (methodCall, rowExpression) => {
613608
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
614609
return $"exp({valueSql})";
615-
});
610+
},
616611

617612
// Math.Log(double)
618-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Log), [typeof(double)])!, (methodCall, rowExpression) => {
613+
[typeof(Math).GetMethod(nameof(Math.Log), [typeof(double)])!] = (methodCall, rowExpression) => {
619614
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
620615
return $"log({valueSql})";
621-
});
616+
},
622617

623618
// Math.Pow(double, double)
624-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Pow), [typeof(double), typeof(double)])!, (methodCall, rowExpression) => {
619+
[typeof(Math).GetMethod(nameof(Math.Pow), [typeof(double), typeof(double)])!] = (methodCall, rowExpression) => {
625620
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
626621
string exponentSql = ExpressionToSql(methodCall.Arguments[1], rowExpression);
627622
return $"power({valueSql}, {exponentSql})";
628-
});
623+
},
629624

630625
// Math.Sqrt(double)
631-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Sqrt), [typeof(double)])!, (methodCall, rowExpression) => {
626+
[typeof(Math).GetMethod(nameof(Math.Sqrt), [typeof(double)])!] = (methodCall, rowExpression) => {
632627
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
633628
return $"sqrt({valueSql})";
634-
});
629+
},
635630

636631
// Math.Sin(double)
637-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Sin), [typeof(double)])!, (methodCall, rowExpression) => {
632+
[typeof(Math).GetMethod(nameof(Math.Sin), [typeof(double)])!] = (methodCall, rowExpression) => {
638633
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
639634
return $"sin({valueSql})";
640-
});
635+
},
641636

642637
// Math.Cos(double)
643-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Cos), [typeof(double)])!, (methodCall, rowExpression) => {
638+
[typeof(Math).GetMethod(nameof(Math.Cos), [typeof(double)])!] = (methodCall, rowExpression) => {
644639
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
645640
return $"cos({valueSql})";
646-
});
641+
},
647642

648643
// Math.Tan(double)
649-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Tan), [typeof(double)])!, (methodCall, rowExpression) => {
644+
[typeof(Math).GetMethod(nameof(Math.Tan), [typeof(double)])!] = (methodCall, rowExpression) => {
650645
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
651646
return $"tan({valueSql})";
652-
});
647+
},
653648

654649
// Math.Asin(double)
655-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Asin), [typeof(double)])!, (methodCall, rowExpression) => {
650+
[typeof(Math).GetMethod(nameof(Math.Asin), [typeof(double)])!] = (methodCall, rowExpression) => {
656651
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
657652
return $"asin({valueSql})";
658-
});
653+
},
659654

660655
// Math.Acos(double)
661-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Acos), [typeof(double)])!, (methodCall, rowExpression) => {
656+
[typeof(Math).GetMethod(nameof(Math.Acos), [typeof(double)])!] = (methodCall, rowExpression) => {
662657
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
663658
return $"acos({valueSql})";
664-
});
659+
},
665660

666661
// Math.Atan(double)
667-
MethodToSqlConverters.Add(typeof(Math).GetMethod(nameof(Math.Atan), [typeof(double)])!, (methodCall, rowExpression) => {
662+
[typeof(Math).GetMethod(nameof(Math.Atan), [typeof(double)])!] = (methodCall, rowExpression) => {
668663
string valueSql = ExpressionToSql(methodCall.Arguments[0], rowExpression);
669664
return $"atan({valueSql})";
670-
});
671-
}
665+
},
666+
};
667+
private Dictionary<MemberInfo, Func<MemberExpression, ParameterExpression, string>> GetDefaultMemberToSqlConverters() => new() {
668+
// string.Length
669+
[typeof(string).GetProperty(nameof(string.Length))!] = (member, rowExpression) => {
670+
string strSql = ExpressionToSql(member.Expression!, rowExpression);
671+
return $"length({strSql})";
672+
},
673+
};
672674
}
673675

674676
/// <summary>

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