private void GenerateFromSql(FromSqlExpression fromSqlExpression)
{
var sql = fromSqlExpression.Sql;
string[] substitutions = null;
switch (fromSqlExpression.Arguments)
{
case ConstantExpression constantExpression
when constantExpression.Value is CompositeRelationalParameter compositeRelationalParameter:
{
var subParameters = compositeRelationalParameter.RelationalParameters;
substitutions = new string[subParameters.Count];
for (var i = 0; i < subParameters.Count; i++)
{
substitutions[i] = _sqlGenerationHelper.GenerateParameterNamePlaceholder(subParameters[i].InvariantName);
}
Sql.AddParameter(compositeRelationalParameter);
break;
}
case ConstantExpression constantExpression
when constantExpression.Value is object[] constantValues:
{
substitutions = new string[constantValues.Length];
for (var i = 0; i < constantValues.Length; i++)
{
var value = constantValues[i];
if (value is RawRelationalParameter rawRelationalParameter)
{
substitutions[i] = _sqlGenerationHelper.GenerateParameterNamePlaceholder(rawRelationalParameter.InvariantName);
Sql.AddParameter(rawRelationalParameter);
}
else if (value is SqlConstantExpression sqlConstantExpression)
{
substitutions[i] = sqlConstantExpression.TypeMapping.GenerateSqlLiteral(sqlConstantExpression.Value);
}
}
break;
}
}
if (substitutions != null)
{
// ReSharper disable once CoVariantArrayConversion
// InvariantCulture not needed since substitutions are all strings
sql = string.Format(sql, substitutions);
}
Sql.AppendLines(sql);
}