Oracle Schema Collections (ADO.NET)

The Microsoft .NET Framework Data Provider for Oracle supports the following specific schema collections in addition to the common schema collections:

• Columns

• Indexes

• IndexColumns

• Procedures

• Sequences

• Synonyms

• Tables

• Users

• Views

• Functions

• Packages

• PackageBodies

• Arguments

• UniqueKeys

• PrimaryKeys

• ForeignKeys

• ForeignKeyColumns

• ProcedureParameters

Columns

ColumnName	DataType	Description
OWNER	String	Owner of the table, view or cluster.
TABLE_NAME	String	Table, view, or cluster name.
COLUMN_NAME	String	Column name.
ID	Decimal	Sequence number of the column as created.
DATATYPE	String	Datatype of the column.
LENGTH	Decimal	Length of the column in bytes.
PRECISION	Decimal	Decimal precision for NUMBER datatype; binary precision for FLOAT datatype, null for all other datatypes.
SCALE	Decimal	Digits to right of decimal point in a number.
NULLABLE	String	Specifies whether a column allows NULLs. Value is N if there is a NOT NULL constraint on the column or if the column is part of a PRIMARY KEY.

Indexes

ColumnName	DataType	Description
OWNER	String	Owner of the index
INDEX_NAME	String	Name of the index.
INDEX_TYPE	String	Type of index (NORMAL, BITMAP, FUNCTION-BASED NORMAL, FUNCTION-BASED BITMAP, or DOMAIN).
TABLE_OWNER	String	Owner of the indexed object.
TABLE_NAME	String	Name of the indexed object.
TABLE_TYPE	String	Type of the indexed object (for example, TABLE, CLUSTER).
UNIQUENESS	String	Whether the index is UNIQUE or NONUNIQUE.
COMPRESSION	String	Whether the index is ENABLED or DISABLED.
PREFIX_LENGTH	Decimal	Number of columns in the prefix of the compression key.
TABLESPACE_NAME	String	Name of the tablespace containing the index.
INI_TRANS	Decimal	Initial number of transactions.
MAX_TRANS	Decimal	Maximum number of transactions.
INITIAL_EXTENT	Decimal	Size of the initial extent.
NEXT_EXTENT	Decimal	Size of secondary extents.
MIN_EXTENTS	Decimal	Minimum number of extents allowed in the segment.
MAX_EXTENTS	Decimal	Maximum number of extents allowed in the segment.
PCT_INCREASE	Decimal	Percentage increase in extent size.
PCT_THRESHOLD	Decimal	Threshold percentage of block space allowed per index entry.
INCLUDE_COLUMN	Decimal	Column ID of the last column to be included in index-organized table primary key (non-overflow) index. This column maps to the COLUMN_ID column of the *_TAB_COLUMNS data dictionary views.
FREELISTS	Decimal	Number of process freelists allocated to this segment.
FREELIST_GROUPS	Decimal	Number of freelist groups allocated to this segment.
PCT_FREE	Decimal	Minimum percentage of free space in a block.
LOGGING	String	Logging information.
BLEVEL	Decimal	B*-Tree level: depth of the index from its root block to its leaf blocks. A depth of 0 indicates that the root block and leaf block are the same.
LEAF_BLOCKS	Decimal	Number of leaf blocks in the index
DISTINCT_KEYS	Decimal	Number of distinct indexed values. For indexes that enforce UNIQUE and PRIMARY KEY constraints, this value is the same as the number of rows in the table (USER_TABLES.NUM_ROWS).
AVG_LEAF_BLOCKS_PER_KEY	Decimal	Average number of leaf blocks in which each distinct value in the index appears rounded to the nearest integer. For indexes that enforce UNIQUE and PRIMARY KEY constraints, this value is always 1.
AVG_DATA_BLOCKS_PER_KEY	Decimal	Average number of data blocks in the table that are pointed to by a distinct value in the index rounded to the nearest integer. This statistic is the average number of data blocks that contain rows that contain a given value for the indexed columns.
CLUSTERING_FACTOR	Decimal	Indicates the amount of order of the rows in the table based on the values of the index.
STATUS	String	Whether a nonpartitioned index is VALID or UNUSABLE.
NUM_ROWS	Decimal	Number of rows in the index.
SAMPLE_SIZE	Decimal	Size of the sample used to analyze the index.
LAST_ANALYZED	DateTime	Date on which this index was most recently analyzed.
DEGREE	String	Number of threads per instance for scanning the index.
INSTANCES	String	Number of instances across which the indexes to be scanned.
PARTITIONED	String	Whether this index is partitioned (YES | NO).
TEMPORARY	String	Whether the index is on a temporary table.
GENERATED	String	Whether the name of the index is system generated (Y|N).
SECONDARY	String	Whether the index is a secondary object created by the ODCIIndexCreate method of the Oracle9i Data Cartridge (Y|N).
BUFFER_POOL	String	Name of the default buffer pool to be used for the index blocks.
USER_STATS	String	Whether the statistics were entered directly by the user.
DURATION	String	Indicates the duration of a temporary table: 1)SYS$SESSION: the rows are preserved for the duration of the session, 2) SYS$TRANSACTION: the rows are deleted after COMMIT, 3) Null for permanent Table.
PCT_DIRECT_ACCESS	Decimal	For a secondary index on an index-organized table, the percentage of rows with VALID guess
ITYP_OWNER	String	For a domain index, the owner of the indextype.
ITYP_NAME	String	For a domain index, the name of the indextype.
PARAMETERS	String	For a domain index, the parameter string.
GLOBAL_STATS	String	For partitioned indexes, indicates whether statistics were collected by analyzing index as a whole (YES) or were estimated from statistics on underlying index partitions and subpartitions (NO).
DOMIDX_STATUS	String	Reflects the status of the domain index. NULL: the specified index is not a domain index. VALID: the index is a valid domain index. IDXTYP_INVLD: the index type of this domain index is invalid.
DOMIDX_OPSTATUS	String	Reflects the status of an operation that was performed on a domain index: NULL: the specified index is not a domain index. VALID: the operation performed without errors. FAILED: the operation failed with an error.
FUNCIDX_STATUS	String	Indicates the status of a function-based index: NULL: this is not a function-based index, ENABLED: the function-based index is enabled, DISABLED: the function-based index is disabled.
JOIN_INDEX	String	Indicates whether this is a join index or not.

IndexColumns

ColumnName	DataType	Description
INDEX_OWNER	String	Owner of the index.
INDEX_NAME	String	Name of the index.
TABLE_OWNER	String	Owner of the table or cluster.
TABLE_NAME	String	Name of the table or cluster.
COLUMN_NAME	String	Column name or attribute of object type column.
COLUMN_POSITION	Decimal	Position of column or attribute within the index.
COLUMN_LENGTH	Decimal	Indexed length of the column.
CHAR_LENGTH	Decimal	Maximum codepoint length of the column.
DESCEND	String	Whether the column is sorted in descending order.

Procedures

ColumnName	DataType	Description
OWNER	String	Owner of the object.
OBJECT_NAME	String	Name of the object.
SUBOBJECT_NAME	String	Name of the subobject (for example, partition).
OBJECT_ID	Decimal	Dictionary object number of the object.
DATA_OBJECT_ID	Decimal	Dictionary object number of the segment that contains the object.
LAST_DDL_TIME	DateTime	Timestamp for the last modification of the object resulting from a DDL command (including grants and revokes).
TIMESTAMP	String	Timestamp for the specification of the object (character data).
STATUS	String	Status of the object (VALID, INVALID, or N/A).
TEMPORARY	String	Whether the object is temporary (the current session can see only data that it placed in this object itself).
GENERATED	String	Was the name of this object system generated? (Y | N).
SECONDARY	String	Whether this is a secondary object created by the ODCIIndexCreate method of the Oracle9i Data Cartridge (Y | N).
CREATED	DateTime	The date the object was created.

Sequences

ColumnName	DataType	Description
SEQUENCE_OWNER	String	Name of the owner of the sequence.
SEQUENCE_NAME	String	Sequence name.
MIN_VALUE	Decimal	Minimum value of the sequence.
MAX_VALUE	Decimal	Maximum value of the sequence.
INCREMENT_BY	Decimal	Value by which sequence is incremented.
CYCLE_FLAG	String	Does sequence wrap around on reaching limit.
ORDER_FLAG	String	Are sequence numbers generated in order.
CACHE_SIZE	Decimal	Number of sequence numbers to cache.
LAST_NUMBER	Decimal	Last sequence number written to disk. If a sequence uses caching, the number written to disk is the last number placed in the sequence cache. This number is likely to be greater than the last sequence number that was used.

Synonyms

ColumnName	DataType	Description
OWNER	String	Owner of the synonym.
SYNONYM_NAME	String	Name of the synonym.
TABLE_OWNER	String	Owner of the object referenced by the synonym.
TABLE_NAME	String	Name of the object referenced by the synonym.
DB_LINK	String	Name of the database link referenced, if any.

Tables

ColumnName	DataType	Description
OWNER	String	Owner of the table.
TABLE_NAME	String	Name of the table.
TYPE	String	Type of table.

Users

ColumnName	DataType	Description
NAME	String	Name of the user.
ID	Decimal	ID number of the user.
CREATEDATE	DateTime	User creation date.

Views

ColumnName	DataType	Description
OWNER	String	Owner of the view.
VIEW_NAME	String	Name of the view.
TEXT_LENGTH	Decimal	Length of the view text.
TEXT	String	View text.
TYPE_TEXT_LENGTH	Decimal	Length of the type clause of the typed view.
TYPE_TEXT	String	Type clause of the typed view.
OID_TEXT_LENGTH	Decimal	Length of the WITH OID clause of the typed view.
OID_TEXT	String	WITH OID clause of the typed view.
VIEW_TYPE_OWNER	String	Owner of the type of the view if the view is a typed view.
VIEW_TYPE	String	Type of the view if the view is a typed view.
SUPERVIEW_NAME	String	Name of the superview.

Functions

ColumnName	DataType	Description
OWNER	String	Owner of the object.
OBJECT_NAME	String	Name of the object.
SUBOBJECT_NAME	String	Name of the subobject (for example, partition).
OBJECT_ID	Decimal	Dictionary object number of the object.
DATA_OBJECT_ID	Decimal	Dictionary object number of the segment that contains the object.
OBJECT_TYPE	String	Type of the object.
CREATED	DateTime	The date the object was created.
LAST_DDL_TIME	DateTime	Timestamp for the last modification of the object resulting from a DDL command (including grants and revokes).
TIMESTAMP	String	Timestamp for the specification of the object (character data)
STATUS	String	Status of the object (VALID, INVALID, or N/A).
TEMPORARY	String	Whether the object is temporary (the current session can see only data that it placed in this object itself).
GENERATED	String	Was the name of this object system generated? (Y | N).
SECONDARY	String	Whether this is a secondary object created by the ODCIIndexCreate method of the Oracle9i Data Cartridge (Y | N).

Packages

ColumnName	DataType	Description
OWNER	String	Owner of the object.
OBJECT_NAME	String	Name of the object.
SUBOBJECT_NAME	String	Name of the subobject (for example, partition).
OBJECT_ID	Decimal	Dictionary object number of the object.
DATA_OBJECT_ID	Decimal	Dictionary object number of the segment that contains the object.
LAST_DDL_TIME	DateTime	Timestamp for the last modification of the object resulting from a DDL command (including grants and revokes).
TIMESTAMP	String	Timestamp for the specification of the object (character data).
STATUS	String	Status of the object (VALID, INVALID, or N/A).
TEMPORARY	String	Whether the object is temporary (the current session can see only data that it placed in this object itself).
GENERATED	String	Was the name of this object system generated? (Y | N).
SECONDARY	String	Whether this is a secondary object created by the ODCIIndexCreate method of the Oracle9i Data Cartridge (Y | N).
CREATED	DateTime	The date the object was created.

PackageBodies

ColumnName	DataType	Description
OWNER	String	Owner of the object.
OBJECT_NAME	String	Name of the object.
SUBOBJECT_NAME	String	Name of the subobject (for example, partition).
OBJECT_ID	Decimal	Dictionary object number of the object.
DATA_OBJECT_ID	Decimal	Dictionary object number of the segment that contains the object.
LAST_DDL_TIME	DateTime	Timestamp for the last modification of the object resulting from a DDL command (including grants and revokes).
TIMESTAMP	String	Timestamp for the specification of the object (character data).
STATUS	String	Status of the object (VALID, INVALID, or N/A).
TEMPORARY	String	Whether the object is temporary (the current session can see only data that it placed in this object itself).
GENERATED	String	Was the name of this object system generated? (Y | N).
SECONDARY	String	Whether this is a secondary object created by the ODCIIndexCreate method of the Oracle9i Data Cartridge (Y | N).
CREATED	DateTime	The date the object was created.

Arguments

ColumnName	DataType	Description
OWNER	String	Name of the owner of the object.
PACKAGE_NAME	String	Package name.
OBJECT_NAME	String	Name of the procedure or function.
ARGUMENT_NAME	String	Name of the argument.
POSITION	Decimal	Position in argument list, or NULL for function return value.
SEQUENCE	Decimal	Argument sequence, including all nesting levels.
DEFAULT_VALUE	String	Default value for the argument.
DEFAULT_LENGTH	Decimal	Length of default value for the argument.
IN_OUT	String	Argument direction (IN, OUT, or IN/OUT).
DATA_LENGTH	Decimal	Length of the column in bytes.
DATA_PRECISION	Decimal	Length in decimal digits (NUMBER) or binary digits (FLOAT).
DATA_SCALE	Decimal	Digits to right of decimal point in a number.
DATA_TYPE	String	Data type of the argument.

UniqueKeys

ColumnName	DataType	Description
OWNER	String	Owner of the constraint definition.
CONSTRAINT_NAME	String	Name of the constraint definition.
TABLE_NAME	String	Name associated with the table (or view) with constraint definition.
SEARCH_CONDITION	String	Text of search condition for a check constraint.
R_OWNER	String	Owner of table referred to in a referential constraint.
R_CONSTRAINT_NAME	String	Name of the unique constraint definition for referenced table.
DELETE_RULE	String	Delete rule for a referential constraint (CASCADE or NO ACTION).
STATUS	String	Enforcement status of constraint (ENABLED or DISABLED).
DEFERRABLE	String	Whether the constraint is deferrable.
VALIDATED	String	Whether all data obeys the constraint (VALIDATED or NOT VALIDATED).
GENERATED	String	Whether the name of the constraint is user or system generated.
BAD	String	A YES value indicates that this constraint specifies a century in an ambiguous manner. To avoid errors resulting from this ambiguity, rewrite the constraint using the TO_DATE function with a four-digit year.
RELY	String	Whether an enabled constraint is enforced or unenforced.
LAST_CHANGE	DateTime	When the constraint was last enabled or disabled
INDEX_OWNER	String	Name of the user owning the index
INDEX_NAME	String	Name of the index

PrimaryKeys

ColumnName	DataType	Description
OWNER	String	Owner of the constraint definition.
CONSTRAINT_NAME	String	Name of the constraint definition.
TABLE_NAME	String	Name associated with the table (or view) with constraint definition.
SEARCH_CONDITION	String	Text of search condition for a check constraint.
R_OWNER	String	Owner of table referred to in a referential constraint.
R_CONSTRAINT_NAME	String	Name of the unique constraint definition for referenced table.
DELETE_RULE	String	Delete rule for a referential constraint (CASCADE or NO ACTION).
STATUS	String	Enforcement status of constraint (ENABLED or DISABLED).
DEFERRABLE	String	Whether the constraint is deferrable.
VALIDATED	String	Whether all data obeys the constraint (VALIDATED or NOT VALIDATED).
GENERATED	String	Whether the name of the constraint is user or system generated.
BAD	String	A YES value indicates that this constraint specifies a century in an ambiguous manner. To avoid errors resulting from this ambiguity, rewrite the constraint using the TO_DATE function with a four-digit year.
RELY	String	Whether an enabled constraint is enforced or unenforced.
LAST_CHANGE	DateTime	When the constraint was last enabled or disabled.
INDEX_OWNER	String	Name of the user owning the index.
INDEX_NAME	String	Name of the index.

ForeignKeys

ColumnName	DataType	Description
PRIMARY_KEY_CONSTRAINT_NAME	String	Name of the constraint definition.
PRIMARY_KEY_OWNER	String	Owner of the constraint definition.
PRIMARY_KEY_TABLE_NAME	String	Name associated with the table (or view) with constraint definition
FOREIGN_KEY_OWNER	String	Owner of the constraint definition.
FOREIGN_KEY_CONSTRIANT_NAME	String	Name of the constraint definition.
FOREIGN_KEY_TABLE_NAME	String	Name associated with the table (or view) with constraint definition.
SEARCH_CONDITION	String	Text of search condition for a check constraint
R_OWNER	String	Owner of table referred to in a referential constraint.
R_CONSTRAINT_NAME	String	Name of the unique constraint definition for referenced table.
DELETE_RULE	String	Delete rule for a referential constraint (CASCADE or NO ACTION).
STATUS	String	Enforcement status of constraint (ENABLED or DISABLED).
VALIDATED	String	Whether all data obeys the constraint (VALIDATED or NOT VALIDATED).
GENERATED	String	Whether the name of the constraint is user or system generated.
RELY	String	Whether an enabled constraint is enforced or unenforced.
LAST_CHANGE	DateTime	When the constraint was last enabled or disabled.
INDEX_OWNER	String	Name of the user owning the index.
INDEX_NAME	String	Name of the index.

ForeignKeyColumns

ColumnName	DataType	Description
OWNER	String	Owner of the constraint definition.
CONSTRAINT_NAME	String	Name of the constraint definition.
TABLE_NAME	String	Name of the table with constraint definition.
COLUMN_NAME	String	Name of the column or attribute of the object type column specified in the constraint definition.
POSITION	Decimal	Original position of column or attribute in the definition of the object.

ProcedureParameters

ColumnName	DataType	Description
OWNER	String	Owner of the object.
OBJECT_NAME	String	Name of the procedure or function.
PACKAGE_NAME	String	Name of the procedure or function.
OBJECT_ID	Decimal	Object number of the object.
OVERLOAD	String	Overload unique identifier.
ARGUMENT_NAME	String	Name of the argument.
POSITION	Decimal	Position in the argument list, or null for a function return value.
SEQUENCE	Decimal	Argument sequence, including all nesting levels.
DATA_LEVEL	Decimal	Nesting depth of the argument for composite types.
DATA_TYPE	String	Data type of the argument.
DEFAULT_VALUE	String	Default value for the argument.
DEFAULT_LENGTH	Decimal	Length of the default value for the argument.
IN_OUT	String	Argument Direction (IN, OUT, or IN/OUT).
DATA_LENGTH	Decimal	Length of the column (in bytes).
DATA_PRECISION	Decimal	Length in decimal digits (NUMBER) or binary digits (FLOAT).
DATA_SCALE	Decimal	Digits to the right of the decimal point in a number.
RADIX	Decimal	Argument radix for a number.
CHARACTER_SET_NAME	String	Character set name for the argument.
TYPE_OWNER	String	Owner of the type of the argument.
TYPE_NAME	String	Name of the type of the argument. If the type is a package local type (that is, it is declared in a package specification), then this column displays the name of the package.
TYPE_SUBNAME	String	Relevant only for package local types. Displays the name of the type declared in the package identified in the TYPE_NAME column.
TYPE_LINK	String	Relevant only for package local types when the package identified in the TYPE_NAME column is a remote package. This column displays the database link used to refer to the remote package.
PLS_TYPE	String	For numeric arguments, the name of the PL/SQL type of the argument. Null otherwise.
CHAR_LENGTH	Decimal	Character limit for string data types.
CHAR_USED	String	Indicates whether the byte limit (B) or char limit (C) is official for the string.

See Also

Other Resources

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