private MyCatSchemaCollection GetTable(string sql) { MyCatSchemaCollection c = new MyCatSchemaCollection(); MyCatCommand cmd = new MyCatCommand(sql, connection); MyCatDataReader reader = cmd.ExecuteReader(); // add columns for (int i = 0; i < reader.FieldCount; i++) { c.AddColumn(reader.GetName(i), reader.GetFieldType(i)); } using (reader) { while (reader.Read()) { MyCatSchemaRow row = c.AddRow(); for (int i = 0; i < reader.FieldCount; i++) { row[i] = reader.GetValue(i); } } } return(c); }
internal void ProcessOutputParameters(MyCatDataReader reader) { // We apparently need to always adjust our output types since the server // provided data types are not always right AdjustOutputTypes(reader); if ((reader.CommandBehavior & CommandBehavior.SchemaOnly) != 0) { return; } // now read the output parameters data row reader.Read(); string prefix = "@" + StoredProcedure.ParameterPrefix; for (int i = 0; i < reader.FieldCount; i++) { string fieldName = reader.GetName(i); if (fieldName.StartsWith(prefix, StringComparison.OrdinalIgnoreCase)) { fieldName = fieldName.Remove(0, prefix.Length); } MyCatParameter parameter = command.Parameters.GetParameterFlexible(fieldName, true); parameter.Value = reader.GetValue(i); } }
private void LoadTableColumns(MyCatSchemaCollection schemaCollection, string schema, string tableName, string columnRestriction) { string sql = String.Format("SHOW FULL COLUMNS FROM `{0}`.`{1}`", schema, tableName); MyCatCommand cmd = new MyCatCommand(sql, connection); int pos = 1; using (MyCatDataReader reader = cmd.ExecuteReader()) { while (reader.Read()) { string colName = reader.GetString(0); if (columnRestriction != null && colName != columnRestriction) { continue; } MyCatSchemaRow row = schemaCollection.AddRow(); row["TABLE_CATALOG"] = DBNull.Value; row["TABLE_SCHEMA"] = schema; row["TABLE_NAME"] = tableName; row["COLUMN_NAME"] = colName; row["ORDINAL_POSITION"] = pos++; row["COLUMN_DEFAULT"] = reader.GetValue(5); row["IS_NULLABLE"] = reader.GetString(3); row["DATA_TYPE"] = reader.GetString(1); row["CHARACTER_MAXIMUM_LENGTH"] = DBNull.Value; row["CHARACTER_OCTET_LENGTH"] = DBNull.Value; row["NUMERIC_PRECISION"] = DBNull.Value; row["NUMERIC_SCALE"] = DBNull.Value; row["CHARACTER_SET_NAME"] = reader.GetValue(2); row["COLLATION_NAME"] = row["CHARACTER_SET_NAME"]; row["COLUMN_TYPE"] = reader.GetString(1); row["COLUMN_KEY"] = reader.GetString(4); row["EXTRA"] = reader.GetString(6); row["PRIVILEGES"] = reader.GetString(7); row["COLUMN_COMMENT"] = reader.GetString(8); ParseColumnRow(row); } } }
internal static void InitCollections(MyCatConnection connection) { defaultCollations = new Dictionary <string, string>(); maxLengths = new Dictionary <string, int>(); MyCatCommand cmd = new MyCatCommand("SHOW CHARSET", connection); using (MyCatDataReader reader = cmd.ExecuteReader()) { while (reader.Read()) { defaultCollations.Add(reader.GetString(0), reader.GetString(2)); maxLengths.Add(reader.GetString(0), Convert.ToInt32(reader.GetValue(3))); } } }
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteScalar/*'/> public override object ExecuteScalar() { lastInsertedId = -1; object val = null; #if !NETSTANDARD1_3 // give our interceptors a shot at it first if (connection != null && connection.commandInterceptor.ExecuteScalar(CommandText, ref val)) { return(val); } #endif using (MyCatDataReader reader = ExecuteReader()) { if (reader.Read()) { val = reader.GetValue(0); } } return(val); }
private void FindTables(MyCatSchemaCollection schema, string[] restrictions) { StringBuilder sql = new StringBuilder(); StringBuilder where = new StringBuilder(); sql.AppendFormat(CultureInfo.InvariantCulture, "SHOW TABLE STATUS FROM `{0}`", restrictions[1]); if (restrictions != null && restrictions.Length >= 3 && restrictions[2] != null) { where.AppendFormat(CultureInfo.InvariantCulture, " LIKE '{0}'", restrictions[2]); } sql.Append(where.ToString()); string table_type = restrictions[1].ToLower() == "information_schema" ? "SYSTEM VIEW" : "BASE TABLE"; MyCatCommand cmd = new MyCatCommand(sql.ToString(), connection); using (MyCatDataReader reader = cmd.ExecuteReader()) { while (reader.Read()) { MyCatSchemaRow row = schema.AddRow(); row["TABLE_CATALOG"] = null; row["TABLE_SCHEMA"] = restrictions[1]; row["TABLE_NAME"] = reader.GetString(0); row["TABLE_TYPE"] = table_type; row["ENGINE"] = GetString(reader, 1); row["VERSION"] = reader.GetValue(2); row["ROW_FORMAT"] = GetString(reader, 3); row["TABLE_ROWS"] = reader.GetValue(4); row["AVG_ROW_LENGTH"] = reader.GetValue(5); row["DATA_LENGTH"] = reader.GetValue(6); row["MAX_DATA_LENGTH"] = reader.GetValue(7); row["INDEX_LENGTH"] = reader.GetValue(8); row["DATA_FREE"] = reader.GetValue(9); row["AUTO_INCREMENT"] = reader.GetValue(10); row["CREATE_TIME"] = reader.GetValue(11); row["UPDATE_TIME"] = reader.GetValue(12); row["CHECK_TIME"] = reader.GetValue(13); row["TABLE_COLLATION"] = GetString(reader, 14); row["CHECKSUM"] = reader.GetValue(15); row["CREATE_OPTIONS"] = GetString(reader, 16); row["TABLE_COMMENT"] = GetString(reader, 17); } } }
public virtual MyCatSchemaCollection GetIndexColumns(string[] restrictions) { MyCatSchemaCollection dt = new MyCatSchemaCollection("IndexColumns"); dt.AddColumn("INDEX_CATALOG", typeof(string)); dt.AddColumn("INDEX_SCHEMA", typeof(string)); dt.AddColumn("INDEX_NAME", typeof(string)); dt.AddColumn("TABLE_NAME", typeof(string)); dt.AddColumn("COLUMN_NAME", typeof(string)); dt.AddColumn("ORDINAL_POSITION", typeof(int)); dt.AddColumn("SORT_ORDER", typeof(string)); int max = restrictions == null ? 4 : restrictions.Length; string[] tableRestrictions = new string[Math.Max(max, 4)]; if (restrictions != null) { restrictions.CopyTo(tableRestrictions, 0); } tableRestrictions[3] = "BASE TABLE"; MyCatSchemaCollection tables = GetTables(tableRestrictions); foreach (MyCatSchemaRow table in tables.Rows) { string sql = String.Format("SHOW INDEX FROM `{0}`.`{1}`", table["TABLE_SCHEMA"], table["TABLE_NAME"]); MyCatCommand cmd = new MyCatCommand(sql, connection); using (MyCatDataReader reader = cmd.ExecuteReader()) { while (reader.Read()) { string key_name = GetString(reader, reader.GetOrdinal("KEY_NAME")); string col_name = GetString(reader, reader.GetOrdinal("COLUMN_NAME")); if (restrictions != null) { if (restrictions.Length >= 4 && restrictions[3] != null && key_name != restrictions[3]) { continue; } if (restrictions.Length >= 5 && restrictions[4] != null && col_name != restrictions[4]) { continue; } } MyCatSchemaRow row = dt.AddRow(); row["INDEX_CATALOG"] = null; row["INDEX_SCHEMA"] = table["TABLE_SCHEMA"]; row["INDEX_NAME"] = key_name; row["TABLE_NAME"] = GetString(reader, reader.GetOrdinal("TABLE")); row["COLUMN_NAME"] = col_name; row["ORDINAL_POSITION"] = reader.GetValue(reader.GetOrdinal("SEQ_IN_INDEX")); row["SORT_ORDER"] = reader.GetString("COLLATION"); } } } return(dt); }