public SqlQueryBuilder Select(IEnumerable <SelectField> fields)
{
fields.AssertNotNull(nameof(fields));
fields = fields.Select(x => new SelectField(DAOHelper.EscapeField(x.Field), x.Alias));
_selectFields = fields;
return(this);
}
private string WhereCondition(string tableAlias, string fieldName, WhereOperator whereOperator, object value, bool skipIfNull = true)
{
tableAlias.AssertHasText(nameof(tableAlias));
if (skipIfNull && IsNullOrEmptyString(value) && (whereOperator != WhereOperator.EqualTo && whereOperator != WhereOperator.EqualTo))
{
return(string.Empty);
}
string originalFieldName = fieldName;
fieldName = DAOHelper.EscapeField(fieldName);
switch (whereOperator)
{
case WhereOperator.EqualTo:
case WhereOperator.NotEqualTo:
if (!(IsNullOrEmptyString(value) && skipIfNull))
{
SqlParameter paramNotEqualTo = _parametersManager.BuildSqlParameter(originalFieldName, value);
Parameters.Add(paramNotEqualTo);
if (IsNullOrEmptyString(value))
{
return($"{fieldName} IS {(whereOperator == WhereOperator.EqualTo ? string.Empty : "NOT ")}NULL");
}
return($"{fieldName} {WhereOperatorToSql(whereOperator)} {paramNotEqualTo.Name}");
}
break;
case WhereOperator.GreaterThan:
case WhereOperator.GreatherEqualThan:
case WhereOperator.LessEqualThan:
case WhereOperator.LessThan:
SqlParameter paramLessThan = _parametersManager.BuildSqlParameter(originalFieldName, value);
Parameters.Add(paramLessThan);
return($"{fieldName} {WhereOperatorToSql(whereOperator)} {paramLessThan.Name}");
case WhereOperator.In:
case WhereOperator.NotIn:
IEnumerable <object> valueList = value as IEnumerable <object>;
if (valueList.IsNull())
{
throw new ArgumentException("Invalid value provided for IN/NOT IN WhereOperator");
}
StringBuilder chunk = new StringBuilder($"{WhereOperatorToSql(whereOperator)}(");
IList <string> chunkList = new List <string>();
foreach (object valueItem in valueList)
{
SqlParameter paramIn = _parametersManager.BuildSqlParameter(originalFieldName, value);
Parameters.Add(paramIn);
chunkList.Add($"{paramIn.Name}");
}
chunk.Append(chunkList.StringJoin(","));
chunk.Append(")");
return(chunk.ToString());
case WhereOperator.Like:
SqlParameter paramLike = _parametersManager.BuildSqlParameter(originalFieldName, value);
Parameters.Add(paramLike);
return($"{fieldName} {WhereOperatorToSql(whereOperator)} %{paramLike.Name}%");
}
return(string.Empty);
}
