58 lines
2.3 KiB
C#
58 lines
2.3 KiB
C#
using NPoco;
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using System.Collections.Generic;
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using System.Linq;
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using Umbraco.Core.Persistence.DatabaseModelDefinitions;
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namespace Umbraco.Core.Persistence.SqlSyntax
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{
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internal static class SqlSyntaxProviderExtensions
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{
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public static IEnumerable<DbIndexDefinition> GetDefinedIndexesDefinitions(this ISqlSyntaxProvider sql, IDatabase db)
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{
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return sql.GetDefinedIndexes(db)
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.Select(x => new DbIndexDefinition(x)).ToArray();
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}
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/// <summary>
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/// Returns the quotes tableName.columnName combo
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="tableName"></param>
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/// <param name="columnName"></param>
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/// <returns></returns>
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public static string GetQuotedColumn(this ISqlSyntaxProvider sql, string tableName, string columnName)
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{
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return sql.GetQuotedTableName(tableName) + "." + sql.GetQuotedColumnName(columnName);
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}
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/// <summary>
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/// This is used to generate a delete query that uses a sub-query to select the data, it is required because there's a very particular syntax that
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/// needs to be used to work for all servers: SQLCE and MSSQL
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/// </summary>
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/// <returns></returns>
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/// <remarks>
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/// See: http://issues.umbraco.org/issue/U4-3876
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/// </remarks>
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public static Sql GetDeleteSubquery(this ISqlSyntaxProvider sqlProvider, string tableName, string columnName, Sql subQuery, WhereInType whereInType = WhereInType.In)
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{
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//TODO: This is no longer necessary since this used to be a specific requirement for MySql!
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// Now we can do a Delete<T> + sub query, see RelationRepository.DeleteByParent for example
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return
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new Sql(string.Format(
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whereInType == WhereInType.In
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? @"DELETE FROM {0} WHERE {1} IN (SELECT {1} FROM ({2}) x)"
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: @"DELETE FROM {0} WHERE {1} NOT IN (SELECT {1} FROM ({2}) x)",
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sqlProvider.GetQuotedTableName(tableName),
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sqlProvider.GetQuotedColumnName(columnName),
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subQuery.SQL), subQuery.Arguments);
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}
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}
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internal enum WhereInType
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{
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In,
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NotIn
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}
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}
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