tk/FreeSql
1
0
Fork 0
mirror of https://github.com/nsnail/FreeSql.git synced 2025-11-04 09:15:27 +08:00
Code Issues Packages Projects Releases Wiki Activity

- 优化 LIKE 表达式解析 #1870； - 移除 OdbcDameng/OdbcKingbaseES；

Browse Source
This commit is contained in:
2881099
2024-08-09 20:35:06 +08:00
parent 60b5ed56b8
commit 040f9bdabe
116 changed files with 162 additions and 25246 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
Providers/FreeSql.Provider.SqlServer/SqlServerExpression.cs
View File

@@ -304,19 +304,20 @@ namespace FreeSql.SqlServer
case "StartsWith":
case "EndsWith":
case "Contains":
var leftLike = exp.Object.NodeType == ExpressionType.MemberAccess ? left : $"({left})";
var args0Value = getExp(exp.Arguments[0]);
if (args0Value == "NULL") return $"({left}) IS NULL";
if (args0Value == "NULL") return $"{leftLike} IS NULL";
if (args0Value.Contains("%"))
{
if (exp.Method.Name == "StartsWith") return $"charindex({args0Value}, {left}) = 1";
if (exp.Method.Name == "EndsWith") return $"charindex({args0Value}, {left}) = len({left})-len({args0Value})+1";
return $"charindex({args0Value}, {left}) > 0";
}
if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(cast({args0Value} as nvarchar(max))+'%')")}";
if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'+cast({args0Value} as nvarchar(max)))")}";
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
if (args0Value.StartsWith("N'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(2, "%").Insert(args0Value.Length, "%")}";
return $"({left}) LIKE ('%'+cast({args0Value} as nvarchar(max))+'%')";
if (exp.Method.Name == "StartsWith") return $"{leftLike} LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(cast({args0Value} as nvarchar(max))+'%')")}";
if (exp.Method.Name == "EndsWith") return $"{leftLike} LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'+cast({args0Value} as nvarchar(max)))")}";
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"{leftLike} LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
if (args0Value.StartsWith("N'") && args0Value.EndsWith("'")) return $"{leftLike} LIKE {args0Value.Insert(2, "%").Insert(args0Value.Length, "%")}";
return $"{leftLike} LIKE ('%'+cast({args0Value} as nvarchar(max))+'%')";
case "ToLower": return $"lower({left})";
case "ToUpper": return $"upper({left})";
case "Substring":