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Add schema providers for Tables and Views. #719

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Oct 18, 2019
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Add schema providers for Tables and Views. #719

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93 changes: 93 additions & 0 deletions src/MySqlConnector/Core/SchemaProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@ public SchemaProvider(MySqlConnection connection)
{ "DataTypes", FillDataTypes },
{ "Procedures", FillProcedures },
{ "ReservedWords", FillReservedWords },
{ "Tables", FillTables },
{ "Views", FillViews },
};
}

Expand Down Expand Up @@ -469,6 +471,97 @@ private void FillReservedWords(DataTable dataTable)
dataTable.Rows.Add(word);
}

private void FillTables(DataTable dataTable)
{
dataTable.Columns.AddRange(new[]
{
new DataColumn("TABLE_CATALOG", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_SCHEMA", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_NAME", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_TYPE", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("ENGINE", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("VERSION", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("ROW_FORMAT", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_ROWS", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("AVG_ROW_LENGTH", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("DATA_LENGTH", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("MAX_DATA_LENGTH", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("INDEX_LENGTH", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("DATA_FREE", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("AUTO_INCREMENT", typeof(long)), // lgtm[cs/local-not-disposed]
new DataColumn("CREATE_TIME", typeof(DateTime)), // lgtm[cs/local-not-disposed]
new DataColumn("UPDATE_TIME", typeof(DateTime)), // lgtm[cs/local-not-disposed]
new DataColumn("CHECK_TIME", typeof(DateTime)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_COLLATION", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("CHECKSUM", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("CREATE_OPTIONS", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_COMMENT", typeof(string)), // lgtm[cs/local-not-disposed]
});

Action? close = null;
if (m_connection.State != ConnectionState.Open)
{
m_connection.Open();
close = m_connection.Close;
}

using (var command = m_connection.CreateCommand())
{
#pragma warning disable CA2100
command.CommandText = "SELECT " + string.Join(", ", dataTable.Columns.Cast<DataColumn>().Select(x => x.ColumnName)) + " FROM INFORMATION_SCHEMA.TABLES;";
#pragma warning restore CA2100
using var reader = command.ExecuteReader();
while (reader.Read())
{
var rowValues = new object[dataTable.Columns.Count];
reader.GetValues(rowValues);
dataTable.Rows.Add(rowValues);
}
}

close?.Invoke();
}

private void FillViews(DataTable dataTable)
{
dataTable.Columns.AddRange(new[]
{
new DataColumn("TABLE_CATALOG", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_SCHEMA", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("TABLE_NAME", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("VIEW_DEFINITION", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("CHECK_OPTION", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("IS_UPDATABLE", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("DEFINER", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("SECURITY_TYPE", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("CHARACTER_SET_CLIENT", typeof(string)), // lgtm[cs/local-not-disposed]
new DataColumn("COLLATION_CONNECTION", typeof(string)), // lgtm[cs/local-not-disposed]
});

Action? close = null;
if (m_connection.State != ConnectionState.Open)
{
m_connection.Open();
close = m_connection.Close;
}

using (var command = m_connection.CreateCommand())
{
#pragma warning disable CA2100
command.CommandText = "SELECT " + string.Join(", ", dataTable.Columns.Cast<DataColumn>().Select(x => x.ColumnName)) + " FROM INFORMATION_SCHEMA.VIEWS;";
#pragma warning restore CA2100
using var reader = command.ExecuteReader();
while (reader.Read())
{
var rowValues = new object[dataTable.Columns.Count];
reader.GetValues(rowValues);
dataTable.Rows.Add(rowValues);
}
}

close?.Invoke();
}

readonly MySqlConnection m_connection;
readonly Dictionary<string, Action<DataTable>> m_schemaCollections;
}
Expand Down