[MSSQL] Fix string length when using nchar, nvarchar, ntext

NathanW2 · NathanW2 · commit 1c273f815dfd · 2017-07-05T14:25:13.000+10:00
diff --git a/src/providers/mssql/qgsmssqlprovider.cpp b/src/providers/mssql/qgsmssqlprovider.cpp
@@ -418,11 +418,16 @@ void QgsMssqlProvider::loadFields()
         }
         if ( sqlType == QVariant::String )
         {
+          int length = query.value( 7 ).toInt();
+          if ( sqlTypeName.startsWith( "n" ) )
+          {
+            length = length / 2;
+          }
           mAttributeFields.append(
             QgsField(
               query.value( 3 ).toString(), sqlType,
               sqlTypeName,
-              query.value( 7 ).toInt() ) );
+              length ) );
         }
         else if ( sqlType == QVariant::Double )
         {

Original file line number	Diff line number	Diff line change
`@@ -418,11 +418,16 @@ void QgsMssqlProvider::loadFields()`
`418`	`418`	`}`
`419`	`419`	`if ( sqlType == QVariant::String )`
`420`	`420`	`{`
	`421`	`+ int length = query.value( 7 ).toInt();`
	`422`	`+ if ( sqlTypeName.startsWith( "n" ) )`
	`423`	`+ {`
	`424`	`+ length = length / 2;`
	`425`	`+ }`
`421`	`426`	`mAttributeFields.append(`
`422`	`427`	`QgsField(`
`423`	`428`	`query.value( 3 ).toString(), sqlType,`
`424`	`429`	`sqlTypeName,`
`425`		`- query.value( 7 ).toInt() ) );`
	`430`	`+ length ) );`
`426`	`431`	`}`
`427`	`432`	`else if ( sqlType == QVariant::Double )`
`428`	`433`	`{`