Merge branch 'master' of https://github.com/borisdj/EFCore.BulkExtensions

Author: borisdj

EFCore.BulkExtensions.MySql/SqlAdapters/MySql/MySqlAdapter.cs

@@ -367,7 +367,7 @@ public async Task TruncateAsync(DbContext context, TableInfo tableInfo, Cancella
                     while (await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
                     {
                         Int64.TryParse(reader[0].ToString(), out long result);
-                        hasUniqueConstrain = result == 1;
+                        hasUniqueConstrain = result > 0;
                     }
                 }
             }
@@ -379,7 +379,7 @@ public async Task TruncateAsync(DbContext context, TableInfo tableInfo, Cancella
                     while (reader.Read())
                     {
                         Int64.TryParse(reader[0].ToString(), out long result);
-                        hasUniqueConstrain = result == 1;
+                        hasUniqueConstrain = result > 0;
                     }
                 }
             }

EFCore.BulkExtensions.MySql/SqlAdapters/MySql/MySqlQueryBuilder.cs

@@ -241,12 +241,28 @@ public static string DropUniqueConstrain(TableInfo tableInfo)
     /// <param name="tableInfo"></param>
     public static string HasUniqueConstrain(TableInfo tableInfo)
     {
-        var tableName = tableInfo.TableName;
-
-        var uniqueConstrainName = GetUniqueConstrainName(tableInfo);
-
-        var q = $@"SELECT DISTINCT CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE " +
-                $@"CONSTRAINT_TYPE = 'UNIQUE' AND CONSTRAINT_NAME = '{uniqueConstrainName}';";
+        var usedKeyValues =  string.Join(",", tableInfo.PrimaryKeysPropertyColumnNameDict.Keys.ToList());
+        var q = $"""
+                 SELECT COUNT(*) FROM(
+                 SELECT 
+                     s.TABLE_SCHEMA,
+                     s.TABLE_NAME,
+                     s.INDEX_NAME,
+                     tc.CONSTRAINT_TYPE,
+                     GROUP_CONCAT(s.COLUMN_NAME ORDER BY s.SEQ_IN_INDEX) AS 'columns_keys'
+                 FROM INFORMATION_SCHEMA.STATISTICS s
+                 LEFT JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
+                     ON s.TABLE_SCHEMA = tc.TABLE_SCHEMA
+                     AND s.TABLE_NAME = tc.TABLE_NAME
+                     AND s.INDEX_NAME = tc.CONSTRAINT_NAME
+                 where
+                 	s.NON_UNIQUE = 0
+                 	and s.TABLE_SCHEMA = '{tableInfo.Schema}'
+                 	and s.TABLE_NAME = '{tableInfo.TableName}'
+                 GROUP BY s.TABLE_SCHEMA, s.TABLE_NAME, s.INDEX_NAME, tc.CONSTRAINT_TYPE
+                 having columns_keys = '{usedKeyValues}'
+                 ) as t
+                 """;
         return q;
     }
 

README.md

@@ -17,16 +17,16 @@ Icon>> and Logo (__):
 Open source (MIT or cFOSS) authored [.Net libraries](https://infopedia.io/dot-net-libraries/) and other projects (@[**Infopedia.io**](https://infopedia.io/) personal blog post)
 | №  | Project                  | Type | Description                                              |
 | -  | ------------------------ | ---- | -------------------------------------------------------- |
-| 1* | [EFCore.BulkExtensions](https://github.com/borisdj/EFCore.BulkExtensions) | .Net Lib.(nuget) | EF Core Bulk CRUD Ops (**Flagship** Lib) |
-| 2  | [EFCore.UtilExtensions](https://github.com/borisdj/EFCore.UtilExtensions) | .Net Lib.(nuget) | EF Core Custom Annotations and AuditInfo |
-| 3  | [EFCore.FluentApiToAnnotation](https://github.com/borisdj/EFCore.FluentApiToAnnotation) | .Net Lib.(nuget) | Converting FluentApi configuration to Annotations |
-| 4  | [ExcelIO.FastMapper](https://github.com/borisdj/ExcelIO.FastMapper) | .Net Lib.(nuget) | Excel I/O Mapper to-from Poco & .xlsx with attribute |
-| 5  | [FixedWidthParserWriter](https://github.com/borisdj/FixedWidthParserWriter) | .Net Lib.(nuget) | Reading & Writing fixed-width/flat data files |
-| 6  | [CsCodeGenerator](https://github.com/borisdj/CsCodeGenerator) | .Net Lib.(nuget) | C# code generation based on Classes and elements |
-| 7  | [CsCodeExample](https://github.com/borisdj/CsCodeExample) | C# Code | Examples of C# code in form of a simple tutorial |
+| 1* | [EFCore.BulkExtensions](https://github.com/borisdj/EFCore.BulkExtensions) | .Net_Lib(ngt) cF | EF Core Bulk CRUD Ops (**Flagship** Library) |
+| 2  | [EFCore.UtilExtensions](https://github.com/borisdj/EFCore.UtilExtensions) | .Net_Lib(ngt) MIT | EF Core Custom Annotations and AuditInfo |
+| 3  | [EFCore.FluentApiToAnnotation](https://github.com/borisdj/EFCore.FluentApiToAnnotation) | .Net_Lib(ngt) MIT | Converting FluentApi configuration to Annotations |
+| 4  | [ExcelIO.FastMapper](https://github.com/borisdj/ExcelIO.FastMapper) | .Net_Lib(ngt) MIT | Excel I/O Mapper to-from Poco & .xlsx + attribute |
+| 5  | [FixedWidthParserWriter](https://github.com/borisdj/FixedWidthParserWriter) | .Net_Lib(ngt) MIT | Reading & Writing fixed-width/flat data files |
+| 6  | [CsCodeGenerator](https://github.com/borisdj/CsCodeGenerator) | .Net_Lib(ngt) MIT | C# code generation based on Classes and elements |
+| 7  | [CsCodeExample](https://github.com/borisdj/CsCodeExample) | C# Code ( - )  MIT | Examples of C# code in form of a simple tutorial |
 
 ## License
-BulkExtensions [licensed](https://github.com/borisdj/EFCore.BulkExtensions/blob/master/LICENSE.txt) under [**Dual License**](https://codis.tech/efcorebulk) (**cFOSS**: conditionallyFree OSS - [**OpenSource Sustainability**](https://infopedia.io/solution-to-opensource-sustainability/) & funding).  
+BulkExtensions [licensed](https://github.com/borisdj/EFCore.BulkExtensions/blob/master/LICENSE.txt) under [**Dual License**](https://codis.tech/efcorebulk) (**cFOSS**: *conditionallyFree* OSS - [**OpenSource Sustainability**](https://infopedia.io/solution-to-opensource-sustainability/) & funding).  
 If you do not meet criteria for free usage of software with community license then you have to buy commercial one.  
 If eligible for free usage but still need  active support, consider purchasing Starter Lic.  
 
@@ -54,7 +54,7 @@ Instead Test options are  SqlServer(Developer or Express), LocalDb(if alongside
 ## Installation
 Available on [![NuGet](https://img.shields.io/nuget/v/EFCore.BulkExtensions.svg)](https://www.nuget.org/packages/EFCore.BulkExtensions/)  [![Downloads](https://img.shields.io/nuget/dt/EFCore.BulkExtensions.svg)](https://www.nuget.org/packages/EFCore.BulkExtensions/)  
 Main nuget is for all Databases, and specific ones with single provider for those who need small packages.  
-Package manager console command for installation: *Install-Package EFCore.BulkExtensions*  
+Package manager console command to install: *Install-Package EFCore.BulkExtensions*  
 Specific ones have adapter suffix: MainNuget + *.SqlServer/PostgreSql/MySql/Oracle/Sqlite* 
 (
 [![](https://img.shields.io/static/v1?label=&message=MS&color=darkred)](https://www.nuget.org/packages/EFCore.BulkExtensions.SqlServer)