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DB2 dialect enhancements #2058
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DB2 dialect enhancements #2058
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e08bcd7
Add schema update capability
hazzik 74904ff
Fix generating parameter names
hazzik 3b0f904
Register bit operations
hazzik 661cd0f
Fix substring function registration
hazzik a634fe6
Fix current_timestamp function registration
hazzik 6b780b3
Fix round function registration
hazzik 8675d2d
Fix Timestamp resolution in ticks
hazzik ab0148f
Fix DbType.Guid type registration
hazzik 3edcb5d
Fix DbType.Byte handling
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Data; | ||
| using System.Data.Common; | ||
|
|
||
| namespace NHibernate.Dialect.Schema | ||
| { | ||
| public class DB2MetaData : AbstractDataBaseSchema | ||
| { | ||
| public DB2MetaData(DbConnection connection) : base(connection) | ||
| { | ||
| } | ||
|
|
||
| public override ITableMetadata GetTableMetadata(DataRow rs, bool extras) | ||
| { | ||
| return new DB2TableMetaData(rs, this, extras); | ||
| } | ||
|
|
||
| public override DataTable GetIndexColumns(string catalog, string schemaPattern, string tableName, string indexName) | ||
| { | ||
| var restrictions = new[] {tableName, indexName}; | ||
| return Connection.GetSchema("Indexes", restrictions); | ||
| } | ||
|
|
||
| public override ISet<string> GetReservedWords() | ||
| { | ||
| var result = new HashSet<string>(StringComparer.OrdinalIgnoreCase); | ||
| var dtReservedWords = Connection.GetSchema(DbMetaDataCollectionNames.ReservedWords); | ||
| foreach (DataRow row in dtReservedWords.Rows) | ||
| { | ||
| result.Add(row["ReservedWord"].ToString()); | ||
| } | ||
|
|
||
| if (IncludeDataTypesInReservedWords) | ||
| { | ||
| var dtTypes = Connection.GetSchema(DbMetaDataCollectionNames.DataTypes); | ||
| foreach (DataRow row in dtTypes.Rows) | ||
| { | ||
| result.Add(row["SQL_TYPE_NAME"].ToString()); | ||
| } | ||
| } | ||
|
|
||
| return result; | ||
| } | ||
| } | ||
|
|
||
| public class DB2TableMetaData : AbstractTableMetadata | ||
| { | ||
| public DB2TableMetaData(DataRow rs, IDataBaseSchema meta, bool extras) : base(rs, meta, extras) | ||
| { | ||
| } | ||
|
|
||
| protected override IColumnMetadata GetColumnMetadata(DataRow rs) | ||
| { | ||
| return new DB2ColumnMetaData(rs); | ||
| } | ||
|
|
||
| protected override string GetColumnName(DataRow rs) | ||
| { | ||
| return Convert.ToString(rs["COLUMN_NAME"]); | ||
| } | ||
|
|
||
| protected override string GetConstraintName(DataRow rs) | ||
| { | ||
| return Convert.ToString(rs["FK_NAME"]); | ||
| } | ||
|
|
||
| protected override IForeignKeyMetadata GetForeignKeyMetadata(DataRow rs) | ||
| { | ||
| return new DB2ForeignKeyMetaData(rs); | ||
| } | ||
|
|
||
| protected override IIndexMetadata GetIndexMetadata(DataRow rs) | ||
| { | ||
| return new DB2IndexMetaData(rs); | ||
| } | ||
|
|
||
| protected override string GetIndexName(DataRow rs) | ||
| { | ||
| return Convert.ToString(rs["INDEX_NAME"]); | ||
| } | ||
|
|
||
| protected override void ParseTableInfo(DataRow rs) | ||
| { | ||
| Catalog = Convert.ToString(rs["TABLE_CATALOG"]); | ||
| Schema = Convert.ToString(rs["TABLE_SCHEMA"]); | ||
| if (string.IsNullOrEmpty(Catalog)) Catalog = null; | ||
| if (string.IsNullOrEmpty(Schema)) Schema = null; | ||
| Name = Convert.ToString(rs["TABLE_NAME"]); | ||
| } | ||
| } | ||
|
|
||
| public class DB2ColumnMetaData : AbstractColumnMetaData | ||
| { | ||
| public DB2ColumnMetaData(DataRow rs) : base(rs) | ||
| { | ||
| Name = Convert.ToString(rs["COLUMN_NAME"]); | ||
| Nullable = Convert.ToString(rs["IS_NULLABLE"]); | ||
| TypeName = Convert.ToString(rs["DATA_TYPE_NAME"]); | ||
| } | ||
| } | ||
|
|
||
| public class DB2IndexMetaData : AbstractIndexMetadata | ||
| { | ||
| public DB2IndexMetaData(DataRow rs) : base(rs) | ||
| { | ||
| Name = Convert.ToString(rs["INDEX_NAME"]); | ||
| } | ||
| } | ||
|
|
||
| public class DB2ForeignKeyMetaData : AbstractForeignKeyMetadata | ||
| { | ||
| public DB2ForeignKeyMetaData(DataRow rs) : base(rs) | ||
| { | ||
| Name = Convert.ToString(rs["FK_NAME"]); | ||
| } | ||
| } | ||
| } |
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DB2 does not support byte native (as many other RDBMS) and has a problem handling it. If the value is of type
bytethe provider remaps the parameter asDbType.Binary. Then it throwsInvalidCastExceptiontrying to cast the value tobyte[].