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表达式优先级解析补丁

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28810
2019-05-08 18:36:00 +08:00
parent 8f1bce0574
commit d15be1d040
12 changed files with 42 additions and 25 deletions
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15
FreeSql/Internal/CommonExpression.cs
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@@ -334,6 +334,17 @@ namespace FreeSql.Internal {
static ConcurrentDictionary<Type, Expression> _dicFreeSqlGlobalExtensionsAsSelectExpression = new ConcurrentDictionary<Type, Expression>();
internal string ExpressionBinary(string oper, Expression leftExp, Expression rightExp, ExpTSC tsc) {
switch (oper) {
case "OR":
case "|":
case "&":
case "+":
case "-":
if (oper == "+" && (leftExp.Type == typeof(string) || rightExp.Type == typeof(string)))
return _common.StringConcat(new[] { ExpressionLambdaToSql(leftExp, tsc), ExpressionLambdaToSql(rightExp, tsc) }, new[] { leftExp.Type, rightExp.Type });
return $"({ExpressionLambdaToSql(leftExp, tsc)} {oper} {ExpressionLambdaToSql(rightExp, tsc)})";
}
var left = ExpressionLambdaToSql(leftExp, tsc);
var leftMapColumn = SearchColumnByField(tsc._tables, tsc.currentTable, left);
var isLeftMapType = leftMapColumn != null && (leftMapColumn.Attribute.MapType != rightExp.Type || leftMapColumn.CsType != rightExp.Type);
@@ -384,7 +395,6 @@ namespace FreeSql.Internal {
left = tmp;
}
if (right == "NULL") oper = oper == "=" ? " IS " : " IS NOT ";
if (oper == "+" && (leftExp.Type.FullName == "System.String" || rightExp.Type.FullName == "System.String")) return _common.StringConcat(new[] { left, right }, new[] { leftExp.Type, rightExp.Type });
if (oper == "%") return _common.Mod(left, right, leftExp.Type, rightExp.Type);
tsc.mapType = null;
return $"{left} {oper} {right}";
@@ -867,11 +877,8 @@ namespace FreeSql.Internal {
switch (expBinary.NodeType) {
case ExpressionType.Coalesce:
return _common.IsNull(ExpressionLambdaToSql(expBinary.Left, tsc), ExpressionLambdaToSql(expBinary.Right, tsc));
case ExpressionType.OrElse:
return $"(({ExpressionLambdaToSql(expBinary.Left, tsc)}) OR ({ExpressionLambdaToSql(expBinary.Right, tsc)}))";
}
if (dicExpressionOperator.TryGetValue(expBinary.NodeType, out var tryoper) == false) return "";
return ExpressionBinary(tryoper, expBinary.Left, expBinary.Right, tsc);
}