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Update MySqlCommandInterpreter.cs

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https://github.com/OrchardCMS/Orchard/issues/8056
767 length limitation in mysql
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Mazur Yuriy 2025-01-21 16:14:02 +02:00 committed by GitHub
parent c38c9bf398
commit 12d392fe29
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1 changed files with 31 additions and 4 deletions
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35
src/Orchard/Data/Migration/Interpreters/MySqlCommandInterpreter.cs
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@ -91,6 +91,27 @@ namespace Orchard.Data.Migration.Interpreters {
using (var sqlCommand = session.Connection.CreateCommand()) {
var columnNames = String.Join(", ", command.ColumnNames.Select(c => string.Format("'{0}'", c)));
var tableName = PrefixTableName(command.TableName);
var columnList = command.ColumnNames.ToList();
var indexMaximumLenght = 767;
var longColumnNames = new List<string>();
if (columnList.Count > 1) {
string sqlComplicatedIndexes = @"SELECT SUM(CHARACTER_MAXIMUM_LENGTH) FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = '{1}' AND COLUMN_NAME in ({0}) AND TABLE_SCHEMA = '{2}' AND
(Data_type = 'varchar');";
sqlComplicatedIndexes = string.Format(sqlComplicatedIndexes, columnNames, tableName, session.Connection.Database);
sqlCommand.CommandText = sqlComplicatedIndexes;
using (var reader = sqlCommand.ExecuteReader()) {
reader.Read();
if (!reader.IsDBNull(0)) {
var characterMaximumLenght = reader.GetInt32(0);
indexMaximumLenght -= characterMaximumLenght;
if (indexMaximumLenght < 0) {
throw new InvalidOperationException("Cannot create index because indexMaximumLenght less than 0");
}
}
}
}
// check whether the index contains big nvarchar columns or text fields
string sql = @"SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = '{1}' AND COLUMN_NAME in ({0}) AND TABLE_SCHEMA = '{2}' AND
@ -98,13 +119,19 @@ namespace Orchard.Data.Migration.Interpreters {
sql = string.Format(sql, columnNames, tableName, session.Connection.Database);
sqlCommand.CommandText = sql;
var columnList = command.ColumnNames.ToList();
using (var reader = sqlCommand.ExecuteReader()) {
// Provide prefix for string columns with length longer than 767
while (reader.Read()) {
var columnName = reader.GetString(0);
columnList[columnList.IndexOf(columnName)] = string.Format("{0}(767)", columnName);
longColumnNames.Add(columnName);
}
}
if (longColumnNames.Count > 0) {
var columnPrefixKeyPartLenght = indexMaximumLenght / longColumnNames.Count;
foreach (var columnName in longColumnNames) {
columnList[columnList.IndexOf(columnName)] = string.Format("{0}({1})", columnName, columnPrefixKeyPartLenght);
}
}
@ -116,4 +143,4 @@ namespace Orchard.Data.Migration.Interpreters {
}
}
}
}
}