Adb ODBC Provider

You can use these databases (among others) in your ETL:

Data Type Mappings

This section lists which database types map to or from which .NET types when querying an ODBC server and working with its database parameters.

Unless otherwise noted, all the below .NET types can be round-tripped to the database, i.e. written out with one of the database target workers, and read back with AdbDataReaderSource<TOutput>.

Note

Mappings tagged with AdbColumnSchema below depend on whether or not an AdbColumnSchema is supplied to SetMappedType(AdbParameter, Type, AdbColumnSchema, ParameterDirection). Of the out of box workers, this is only supplied by AdbInsertTarget<TInputError>.

Provider-Independent .NET Types

.NET types below with Shallow or SingleShallowThenDeep copy policy support multi-copy, the others (with SingleShallow) do not.

.NET Type Display Name DbType (or OdbcType) enum SQL Type (uses SQL Server as example) Copy Policy
Any enum or nullable enum Byte, Int16, Int32, Int64 tinyint, smallint, int, bigint Shallow
System.Boolean, System.Boolean? Boolean bit Shallow
System.Byte, System.Byte? Byte tinyint Shallow
System.Byte[] Binary binary(7), image, varbinary(10), varbinary(max) SingleShallowThenDeep
System.DateTime, System.DateTime? OdbcType.DateTime datetime. Without AdbColumnSchema also: date, datetime2, smalldatetime. Shallow
System.DateTime, System.DateTime? OdbcType.Date, OdbcType.DateTime, OdbcType.SmallDateTime With AAdbColumnSchema: date, datetime2, smalldatetime Shallow
System.Decimal, System.Decimal? Decimal decimal(38,0), money, numeric(10,2), smallmoney Shallow
System.Double, System.Double? Double float Shallow
System.Guid, System.Guid? Guid uniqueidentifier Shallow
System.Int16, System.Int16? Int16 smallint Shallow
System.Int32, System.Int32? Int32 int, integer Shallow
System.Int64, System.Int64? Int64 bigint Shallow
System.Single, System.Single? Single real Shallow
System.String String char(32), nchar(32), ntext, nvarchar(max), text, varchar(max) Shallow

Provider-Specific .NET Types

This provider does not map any provider-specific .NET types. It does however use OdbcType when mapping System.DateTime above.

Parameters

Use positional parameters of the format ?. You can use GetPlaceholder(String) to get the placeholder in a portable manner.

Stored Procedures

Here we execute a stored procedure with parameters. Even building an executable program (or utility method) for executing this single query can be very worthwhile since actionETL adds configuration, error handling, and logging.

We create the command builder outside the worker system to make it easy to return a parameter value to the caller. More commonly, commands and connections are created inside the worker system, as and when they are needed.

using actionETL;
using actionETL.Adb;
using actionETL.Adb.OdbcExternal;
using System.Data;

public static partial class ExecuteStoredProcedureOdbc
{
    public static DateTime GetMaxDateTime()
    {
        // Get a command builder using "actionetl.aconfig.json" connection details.
        // StoredProcedure(string) sets both CommandText and CommandType properties.
        var cb = AdbOdbcProvider.GetSqlServer()
            .CreateCommandBuilderFromDefaultAConfig("OdbcSqlServerTester")
            .StoredProcedure("dbo.GetMaxDateTime ?, ?, ?");

        // Many methods return an instance and allow method chaining.
        // Whenever possible, set the database type explicitly.
        cb.Parameters.Add("countryId").SetDbValue(42, DbType.Int32);

        // Database type not set, provider has to guess the type (which is less good)
        cb.Parameters.Add("category").SetValue("Batteries");

        // Save the parameter reference, since we retrieve the returned value later
        var maxDateTime = cb.Parameters.Add("maxDateTime", ParameterDirection.Output)
            .SetDbType(DbType.DateTime);

        new WorkerSystem()
            // Curly braces and semi-colon not needed in 1-line lambda
            .Root(ws => _ = new AdbExecuteNonQueryWorker(ws, "Call GetMaxDateTime", cb))
            .Start()
            .ThrowOnFailure();

        // Value is of type object, and must be cast
        return (DateTime)maxDateTime.DbValue;
    }
}

/* The example assumes the following stored procedure already exists:
    CREATE PROCEDURE dbo.GetMaxDateTime
        @countryId int, 
        @category nvarchar(50),
        @maxDateTime DateTime output
    AS
    BEGIN
        SET NOCOUNT ON;

        -- Use input parameters...

        SELECT @maxDateTime = '2017-03-13';
    END
 */

Adb Information

The Adb Information example program dumps the below information with this provider querying a MariaDB server. See that example for more information.

Note

The values below will be different if querying a different type of server.

=== AdbConnectionBuilder ===
Provider=System.Data.Odbc:Universal:TableInformation=false


=== AdbConnection ===
DataSourceName=MYHOST\LOCALDB#6A3842B2
DatabaseName=actionetl_tester
NumberOfColumnIdentifierParts=4
NumberOfColumnRestrictions=4
ServerVersion=13.00.4001


=== AdbConnection.Information ===
CompositeIdentifierSeparator=.
CompositeIdentifierSeparatorPattern=\.
DataSourceProductName=Microsoft SQL Server
DataSourceProductVersion=13.00.4001
GetPlaceholder("MyName")=?
GroupByBehavior=MustContainAll
IdentifierCase=Insensitive
IdentifierPattern=
IdentifierQuotePrefix="
IdentifierQuotePrefixes="
IdentifierQuoteSuffix="
IdentifierQuoteSuffixes="
OrderByColumnsInSelect=False
ParameterMarkerFormat=?
ParameterMarkerPattern=\?
ParameterNameMaxLength=0
ParameterNamePattern=
QuotedIdentifierCase=Insensitive
QuotedIdentifierPattern="(([^"]|"")*)"
QuoteIdentifierPart("My Table")="My Table"
StatementSeparatorPattern=
StringLiteralPattern=
SupportedJoinOperators=Inner, LeftOuter, RightOuter, FullOuter
UsesPositionalParameters=True


=== AdbConnection.TableInformation.CreateTableIdentifier([My Database].[My Schema].MyTable) ===
OriginalCompositeName=[My Database].[My Schema].MyTable
OriginalTableName=MyTable
OriginalSchemaName=[My Schema]
OriginalCatalogName=[My Database]
QuotedCompositeName="[My Database]"."[My Schema]"."MyTable"
QuotedTableName="MyTable"
QuotedSchemaName="[My Schema]"
QuotedCatalogName="[My Database]"
UnquotedTableName=MyTable
UnquotedSchemaName=[My Schema]
UnquotedCatalogName=[My Database]


=== AdbConnection.SchemaInformationCollection ===
Note: The metadata schemas can be retrieved with AdbConnection.GetSchema().
The returned information is provided from the .NET provider as-is. Some collections
can be inaccurate, and different values can also be needed for different purposes,
which is why database specific actionETL providers can be created that replace
individual values with the desired ones. See the vendor provider documentation for
details on the returned information.

CollectionName=MetaDataCollections
IsCommon=True
NumberOfRestrictions=0
NumberOfIdentifierParts=0

CollectionName=DataSourceInformation
IsCommon=True
NumberOfRestrictions=0
NumberOfIdentifierParts=0

CollectionName=DataTypes
IsCommon=False
NumberOfRestrictions=0
NumberOfIdentifierParts=0

CollectionName=Restrictions
IsCommon=False
NumberOfRestrictions=0
NumberOfIdentifierParts=0

CollectionName=ReservedWords
IsCommon=False
NumberOfRestrictions=0
NumberOfIdentifierParts=0

CollectionName=Columns
IsCommon=False
NumberOfRestrictions=4
NumberOfIdentifierParts=4

CollectionName=Indexes
IsCommon=False
NumberOfRestrictions=4
NumberOfIdentifierParts=4

CollectionName=Procedures
IsCommon=False
NumberOfRestrictions=4
NumberOfIdentifierParts=3

CollectionName=ProcedureColumns
IsCommon=False
NumberOfRestrictions=4
NumberOfIdentifierParts=4

CollectionName=ProcedureParameters
IsCommon=False
NumberOfRestrictions=4
NumberOfIdentifierParts=4

CollectionName=Tables
IsCommon=False
NumberOfRestrictions=3
NumberOfIdentifierParts=3

CollectionName=Views
IsCommon=False
NumberOfRestrictions=3
NumberOfIdentifierParts=3

See Also