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Oracle® Data Provider for .NET Developer's Guide
11g Release 1 (11.1)

B28375-01
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Common Schema Collections

The common schema collections are available for all .NET Framework managed providers. ODP.NET supports the same common schema collections.

See Also:

"Understanding the Common Schema Collections" in the MSDN Library

MetaDataCollections

Table A-1 is a list of metadata collections that is available from the data source, such as tables, columns, indexes, and stored procedures.

Table A-1 MetaDataCollections

Column Name Data Type Description

CollectionName

string

The name of the collection passed to the GetSchema method for retrieval.

NumberOfRestrictions

int

Number of restrictions specified for the named collection.

NumberOfIdentifierParts

int

Number of parts in the composite identifier/database object name.


DataSourceInformation

Table A-2 lists DataSourceInformation information which may include these columns and possibly others.

Table A-2 DataSource nformation

Columns Data Type Description

CompositeIdentifierSeparatorPattern

string

Separator for multipart names: @ | \ .

DataSourceProductName

string

Database name: Oracle

DataSourceProductVersion

string

Database version. Note that this is the version of the database instance currently being accessed by DbConnection.

DataSourceProductVersionNormalized

string

A normalized DataSource version for easier comparison between different versions. For example:

DataSource Version: 10.2.0.1.0

Normalized DataSource Version: 10.02.00.01.00

GroupByBehavior

GroupByBehavior

An enumeration that indicates the relationship between the columns in a GROUP BY clause and the non-aggregated columns in a select list.

IdentifierPattern

string

Format for a valid identifier.

IdentifierCase

IdentifierCase

An enumeration that specifies whether or not to treat non-quoted identifiers as case sensitive.

OrderByColumnsInSelect

bool

A boolean that indicates whether or not the select list must contain the columns in an ORDER BY clause.

ParameterMarkerFormat

string

A string indicating whether or not parameter markers begin with a special character.

ParameterMarkerPattern

string

The format of a parameter marker.

ParameterNameMaxLength

int

Maximum length of a parameter.

ParameterNamePattern

string

The format for a valid parameter name.

QuotedIdentifierPattern

string

The format of a quoted identifier.

QuotedIdentifierCase

IdentifierCase

An enumeration that specifies whether or not to treat quote identifiers as case sensitive.

StringLiteralPattern

string

The format for a string literal.

SupportedJoinOperators

SupportedJoin Operators

An enumeration indicating the types of SQL join statements supported by the data source.


DataTypes

Table A-3 lists DataTypes Collection information which may include these columns and possibly others.

Note:

As an example, the description column includes complete information for the TIMESTAMP WITH LOCAL TIME ZONE data type.

Table A-3 DataTypes

ColumnName Data Type Description

TypeName

string

The provider-specific data type name.

Example: TIMESTAMP WITH LOCAL TIME ZONE

ProviderDbType

int

The provider-specific type value.

Example: 124

ColumnSize

long

The length of a non-numeric column or parameter.

Example:27

CreateFormat

string

A format string that indicates how to add this column to a DDL statement.

Example: TIMESTAMP({0} WITH LOCAL TIME ZONE)

CreateParameters

string

The parameters specified to create a column of this data type.

Example: 8

DataType

string

The .NET type for the data type.

Example: System.DateTime

IsAutoIncrementable

bool

A boolean value that indicates whether or not this data type can be auto-incremented.

Example: false

IsBestMatch

bool

A boolean value that indicates whether or not this data type is the best match to values in the DataType column.

Example: false

IsCaseSensitive

bool

A boolean value that indicates whether or not this data type is case-sensitive.

Example: false

IsFixedLength

bool

A boolean value that indicates whether or not this data type has a fixed length.

Example: true

IsFixedPrecisionScale

bool

A boolean value that indicates whether or not this data type has a fixed precision and scale.

Example: false

IsLong

bool

A boolean value that indicates whether or not this data type contains very long data.

Example: false

IsNullable

bool

A boolean value that indicates whether or not this data type is nullable.

Example: true

IsSearchable

bool

A boolean value that indicates whether or not the data type can be used in a WHERE clause with any operator, except the LIKE predicate.

Example: true

IsSearchableWithLike

bool

A boolean value that indicates whether or not this data type can be used with the LIKE predicate.

Example: false

IsUnsigned

bool

A boolean value that indicates whether or not the data type is unsigned.

MaximumScale

short

The maximum number of digits allowed to the right of the decimal point.

MinimumScale

short

The minimum number of digits allowed to the right of the decimal point.

IsConcurrencyType

bool

A boolean value that indicates whether or not the database updates the data type every time the row is changed and the value of the column differs from all previous values.

Example: false

MinimumVersion

String

The earliest version of the database that can be used.

Example:09.00.00.00.00

IsLiteralSupported

bool

A boolean value that indicates whether or not the data type can be expressed as a literal.

Example: true

LiteralPrefix

string

The prefix of a specified literal.

Example: TO_TIMESTAMP_TZ('

LiteralSuffix

string

The suffix of a specified literal.

Example: ','YYYY-MM-DD HH24:MI:SS.FF')


Restrictions

Table A-4 lists Restrictions, including the following columns.

Table A-4 Restrictions

ColumnName Data Type Description

CollectionName

string

The collection that the restrictions apply to.

RestrictionName

string

The restriction name.

RestrictionNumber

int

A number that indicates the location of the restriction.


ReservedWords

The ReservedWords collection exposes information about the words that are reserved by the database currently connected to ODP.NET.

Table A-5 lists the ReservedWords Collection.

Table A-5 ReservedWords

ColumnName Data Type Description

ReservedWord

string

Provider-specific reserved words