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Update exp to sql (Optimization null)

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This commit is contained in:
sunkaixuan 2022-09-02 17:28:05 +08:00
parent 6f2c101798
commit 27b77fecd0
1 changed files with 14 additions and 2 deletions
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16
Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
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@ -172,7 +172,12 @@ namespace SqlSugar
string appendValue = Context.SqlParameterKeyWord
+ ((MemberExpression)oppoSiteExpression).Member.Name
+ Context.ParameterIndex;
if (value.ObjToString() != "NULL" && !parameter.ValueIsNull)
if (IsNullValue(parameter, value))
{
appendValue = $" NULL ";
parameter.BaseParameter.ValueIsNull = true;
}
else if (value.ObjToString() != "NULL" && !parameter.ValueIsNull)
{
EntityColumnInfo columnInfo = GetColumnInfo(oppoSiteExpression);
if (columnInfo != null && columnInfo.SqlParameterDbType != null && columnInfo.SqlParameterDbType is System.Data.DbType)
@ -726,7 +731,14 @@ namespace SqlSugar
#endregion
#region Validate
private bool IsNullValue(ExpressionParameter parameter, object value)
{
return value == null
&& !parameter.ValueIsNull
&& parameter.BaseParameter != null
&& parameter.BaseParameter.OperatorValue.IsIn("=","<>")
&& this.Context.ResolveType.IsIn(ResolveExpressType.WhereMultiple, ResolveExpressType.WhereSingle);
}
private static bool IsNotCaseExpression(Expression item)
{
if ((item as MethodCallExpression).Method.Name == "IIF")