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Implement new GetSchemaAsync API. Fixes #835 
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‎docs/content/api/MySqlConnector/MySqlConnection/GetSchema.md‎

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# MySqlConnection.GetSchema method (1 of 3)
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Returns schema information for the data source of this [`MySqlConnection`](../../MySqlConnectionType/).
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```csharp
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public override DataTable GetSchema()
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```
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## Return Value
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A DataTable containing schema information.
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## See Also
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* class [MySqlConnection](../../MySqlConnectionType/)
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# MySqlConnection.GetSchema method (2 of 3)
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Returns schema information for the data source of this [`MySqlConnection`](../../MySqlConnectionType/).
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```csharp
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public override DataTable GetSchema(string collectionName)
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```
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| parameter | description |
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| --- | --- |
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| collectionName | The name of the schema to return. |
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## Return Value
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A DataTable containing schema information.
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## See Also
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* class [MySqlConnection](../../MySqlConnectionType/)
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# MySqlConnection.GetSchema method (3 of 3)
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Returns schema information for the data source of this [`MySqlConnection`](../../MySqlConnectionType/).
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```csharp
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public override DataTable GetSchema(string collectionName, string[] restrictions)
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```
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| parameter | description |
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| --- | --- |
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| collectionName | The name of the schema to return. |
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| restrictions | The restrictions to apply to the schema; this parameter is currently ignored. |
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## Return Value
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A DataTable containing schema information.
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## See Also
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* class [MySqlConnection](../../MySqlConnectionType/)

‎docs/content/api/MySqlConnector/MySqlConnection/GetSchemaAsync.md‎

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title: GetSchemaAsync
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---
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# MySqlConnection.GetSchemaAsync method
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# MySqlConnection.GetSchemaAsync method (1 of 3)
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Asynchronously returns schema information for the data source of this [`MySqlConnection`](../../MySqlConnectionType/).
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```csharp
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public Task<DataTable> GetSchemaAsync(string collectionName = null, string[] restrictions = null,
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public Task<DataTable> GetSchemaAsync(
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CancellationToken cancellationToken = default(CancellationToken))
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```
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| parameter | description |
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| --- | --- |
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| collectionName | The schema name of data to be returned; if `null`, the `MetaDataCollections` schema is returned. |
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| cancellationToken | A token to cancel the asynchronous operation. |
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## Return Value
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A Task containing schema information.
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## See Also
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* class [MySqlConnection](../../MySqlConnectionType/)
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* namespace [MySqlConnector](../../MySqlConnectionType/)
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* assembly [MySqlConnector](../../../MySqlConnectorAssembly/)
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---
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# MySqlConnection.GetSchemaAsync method (2 of 3)
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Asynchronously returns schema information for the data source of this [`MySqlConnection`](../../MySqlConnectionType/).
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```csharp
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public Task<DataTable> GetSchemaAsync(string collectionName,
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CancellationToken cancellationToken = default(CancellationToken))
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```
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| parameter | description |
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| --- | --- |
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| collectionName | The name of the schema to return. |
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| cancellationToken | A token to cancel the asynchronous operation. |
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## Return Value
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A Task containing schema information.
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## See Also
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* class [MySqlConnection](../../MySqlConnectionType/)
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* namespace [MySqlConnector](../../MySqlConnectionType/)
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* assembly [MySqlConnector](../../../MySqlConnectorAssembly/)
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---
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# MySqlConnection.GetSchemaAsync method (3 of 3)
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Asynchronously returns schema information for the data source of this [`MySqlConnection`](../../MySqlConnectionType/).
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```csharp
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public Task<DataTable> GetSchemaAsync(string collectionName, string[] restrictions,
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CancellationToken cancellationToken = default(CancellationToken))
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```
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| parameter | description |
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| --- | --- |
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| collectionName | The name of the schema to return. |
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| restrictions | The restrictions to apply to the schema; this parameter is currently ignored. |
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| cancellationToken | A token to cancel the asynchronous operation. |
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## Return Value
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A Task containing schema information.
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## See Also
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* class [MySqlConnection](../../MySqlConnectionType/)

‎docs/content/api/MySqlConnector/MySqlConnectionType.md‎

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| [CreateCommand](../MySqlConnection/CreateCommand/)() | |
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| override [DisposeAsync](../MySqlConnection/DisposeAsync/)() | |
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| override [EnlistTransaction](../MySqlConnection/EnlistTransaction/)(…) | |
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| override [GetSchema](../MySqlConnection/GetSchema/)() | |
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| override [GetSchema](../MySqlConnection/GetSchema/)(…) | (2 methods) |
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| [GetSchemaAsync](../MySqlConnection/GetSchemaAsync/)(…) | Asynchronously returns schema information for the data source of this [`MySqlConnection`](../MySqlConnectionType/). |
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| override [GetSchema](../MySqlConnection/GetSchema/)() | Returns schema information for the data source of this [`MySqlConnection`](../MySqlConnectionType/). |
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| override [GetSchema](../MySqlConnection/GetSchema/)(…) | Returns schema information for the data source of this [`MySqlConnection`](../MySqlConnectionType/). (2 methods) |
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| [GetSchemaAsync](../MySqlConnection/GetSchemaAsync/)(…) | Asynchronously returns schema information for the data source of this [`MySqlConnection`](../MySqlConnectionType/). (3 methods) |
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| override [Open](../MySqlConnection/Open/)() | |
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| override [OpenAsync](../MySqlConnection/OpenAsync/)(…) | |
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| [Ping](../MySqlConnection/Ping/)() | |

‎src/MySqlConnector/MySqlConnection.cs‎

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#if !NETSTANDARD1_3
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protected override DbProviderFactory DbProviderFactory => MySqlConnectorFactory.Instance;
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/// <inheritdoc cref="DbConnection.GetSchema()"/>
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/// <summary>
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/// Returns schema information for the data source of this <see cref="MySqlConnection"/>.
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/// </summary>
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/// <returns>A <see cref="DataTable"/> containing schema information.</returns>
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public override DataTable GetSchema() => GetSchemaProvider().GetSchemaAsync(IOBehavior.Synchronous, default).GetAwaiter().GetResult();
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/// <inheritdoc cref="DbConnection.GetSchema(string)"/>
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/// <summary>
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/// Returns schema information for the data source of this <see cref="MySqlConnection"/>.
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/// </summary>
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/// <param name="collectionName">The name of the schema to return.</param>
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/// <returns>A <see cref="DataTable"/> containing schema information.</returns>
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public override DataTable GetSchema(string collectionName) => GetSchemaProvider().GetSchemaAsync(IOBehavior.Synchronous, collectionName, default).GetAwaiter().GetResult();
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/// <inheritdoc cref="DbConnection.GetSchema(string)"/>
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/// <summary>
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/// Returns schema information for the data source of this <see cref="MySqlConnection"/>.
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/// </summary>
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/// <param name="collectionName">The name of the schema to return.</param>
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/// <param name="restrictions">The restrictions to apply to the schema; this parameter is currently ignored.</param>
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/// <returns>A <see cref="DataTable"/> containing schema information.</returns>
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public override DataTable GetSchema(string collectionName, string?[] restrictions) => GetSchemaProvider().GetSchemaAsync(IOBehavior.Synchronous, collectionName, default).GetAwaiter().GetResult();
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/// <summary>
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/// Asynchronously returns schema information for the data source of this <see cref="MySqlConnection"/>.
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/// </summary>
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/// <param name="collectionName">The schema name of data to be returned; if <c>null</c>, the <c>MetaDataCollections</c> schema is returned.</param>
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/// <param name="cancellationToken">A token to cancel the asynchronous operation.</param>
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/// <returns>A <see cref="Task{DataTable}"/> containing schema information.</returns>
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public Task<DataTable> GetSchemaAsync(CancellationToken cancellationToken = default) => GetSchemaProvider().GetSchemaAsync(AsyncIOBehavior, cancellationToken).AsTask();
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/// <summary>
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/// Asynchronously returns schema information for the data source of this <see cref="MySqlConnection"/>.
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/// </summary>
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/// <param name="collectionName">The name of the schema to return.</param>
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/// <param name="cancellationToken">A token to cancel the asynchronous operation.</param>
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/// <returns>A <see cref="Task{DataTable}"/> containing schema information.</returns>
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public Task<DataTable> GetSchemaAsync(string collectionName, CancellationToken cancellationToken = default) => GetSchemaProvider().GetSchemaAsync(AsyncIOBehavior, collectionName, cancellationToken).AsTask();
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/// <summary>
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/// Asynchronously returns schema information for the data source of this <see cref="MySqlConnection"/>.
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/// </summary>
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/// <param name="collectionName">The name of the schema to return.</param>
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/// <param name="restrictions">The restrictions to apply to the schema; this parameter is currently ignored.</param>
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/// <param name="cancellationToken">A token to cancel the asynchronous operation.</param>
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/// <returns></returns>
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public Task<DataTable> GetSchemaAsync(string? collectionName = null, string?[]? restrictions = null, CancellationToken cancellationToken = default) =>
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GetSchemaProvider().GetSchemaAsync(IOBehavior.Asynchronous, collectionName ?? "MetaDataCollections", cancellationToken).AsTask();
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/// <returns>A <see cref="Task{DataTable}"/> containing schema information.</returns>
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public Task<DataTable> GetSchemaAsync(string collectionName, string?[] restrictions, CancellationToken cancellationToken = default) => GetSchemaProvider().GetSchemaAsync(AsyncIOBehavior, collectionName, cancellationToken).AsTask();
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private SchemaProvider GetSchemaProvider() => m_schemaProvider ??= new(this);
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