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126 lines
3.6 KiB
126 lines
3.6 KiB
using System.Data;
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using System.Text;
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using Connected.Entities.Annotations;
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namespace Connected.Data.Schema.Sql;
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internal abstract class TableTransaction : SynchronizationTransaction
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{
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protected static string CreateColumnCommandText(ISchemaColumn column)
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{
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var builder = new StringBuilder();
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builder.AppendFormat($"{Escape(column.Name)} {CreateDataTypeMetaData(column)} ");
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if (column.IsIdentity)
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builder.Append("IDENTITY(1,1) ");
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if (column.IsNullable)
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builder.Append("NULL ");
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else
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builder.Append("NOT NULL ");
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return builder.ToString();
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}
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protected static string ResolveColumnLength(ISchemaColumn column)
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{
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if (column.MaxLength == -1)
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return "MAX";
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if (column.MaxLength > 0)
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return column.MaxLength.ToString();
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return column.DataType switch
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{
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DbType.AnsiString or DbType.String or DbType.AnsiStringFixedLength or DbType.StringFixedLength => 50.ToString(),
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DbType.Binary => 128.ToString(),
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DbType.Time or DbType.DateTime2 or DbType.DateTimeOffset => column.DatePrecision.ToString(),
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DbType.VarNumeric => 8.ToString(),
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DbType.Xml => "MAX",
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DbType.Decimal => $"{column.Precision}, {column.Scale}",
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_ => 50.ToString(),
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};
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}
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protected static string CreateDataTypeMetaData(ISchemaColumn column)
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{
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return column.DataType switch
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{
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DbType.AnsiString => $"[varchar]({ResolveColumnLength(column)})",
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DbType.Binary => column.IsVersion ? "[timestamp]" : column.BinaryKind == BinaryKind.Binary ? $"[binary]({ResolveColumnLength(column)})" : $"[varbinary]({ResolveColumnLength(column)})",
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DbType.Byte => "[tinyint]",
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DbType.Boolean => "[bit]",
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DbType.Currency => "[money]",
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DbType.Date => "[date]",
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DbType.DateTime => column.DateKind == DateKind.SmallDateTime ? "[smalldatetime]" : "[datetime]",
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DbType.Decimal => $"[decimal]({ResolveColumnLength(column)})",
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DbType.Double => "[float]",
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DbType.Guid => "[uniqueidentifier]",
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DbType.Int16 => "[smallint]",
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DbType.Int32 => "[int]",
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DbType.Int64 => "[bigint]",
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DbType.Object => $"[varbinary]({ResolveColumnLength(column)})",
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DbType.SByte => "[smallint]",
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DbType.Single => "[real]",
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DbType.String => $"[nvarchar]({ResolveColumnLength(column)})",
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DbType.Time => $"[time]({ResolveColumnLength(column)})",
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DbType.UInt16 => "[int]",
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DbType.UInt32 => "[bigint]",
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DbType.UInt64 => "[float]",
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DbType.VarNumeric => $"[numeric]({ResolveColumnLength(column)})",
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DbType.AnsiStringFixedLength => $"[char]({ResolveColumnLength(column)})",
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DbType.StringFixedLength => $"[nchar]({ResolveColumnLength(column)})",
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DbType.Xml => "[xml]",
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DbType.DateTime2 => $"[datetime2]({ResolveColumnLength(column)})",
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DbType.DateTimeOffset => $"[datetimeoffset]({ResolveColumnLength(column)})",
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_ => throw new NotSupportedException(),
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};
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}
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protected static List<IndexDescriptor> ParseIndexes(ISchema schema)
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{
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var result = new List<IndexDescriptor>();
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foreach (var column in schema.Columns)
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{
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if (column.IsPrimaryKey)
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continue;
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if (column.IsIndex)
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{
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if (string.IsNullOrWhiteSpace(column.Index))
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{
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var index = new IndexDescriptor
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{
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Unique = column.IsUnique,
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};
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index.Columns.Add(column.Name);
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result.Add(index);
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}
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else
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{
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var index = result.FirstOrDefault(f => string.Equals(f.Group, column.Index, StringComparison.OrdinalIgnoreCase));
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if (index is null)
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{
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index = new IndexDescriptor
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{
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Group = column.Index,
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Unique = column.IsUnique
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};
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result.Add(index);
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}
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index.Columns.Add(column.Name);
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}
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}
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}
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return result;
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}
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}
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