تحرير

Oracle Schema Collections

  • مقالة

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_CONSTRAINT_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