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Oracle® Database Reference
12c Release 1 (12.1)

E17615-24
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ALL_MVIEWS

ALL_MVIEWS describes all materialized views accessible to the current user.

Related views

Column Datatype NULL Description
OWNER VARCHAR2(128) NOT NULL Schema in which the materialized view was created
MVIEW_NAME VARCHAR2(128) NOT NULL Name of the materialized view
CONTAINER_NAME VARCHAR2(128) NOT NULL Name of the container in which the materialized view's data is held. Normally this is the same as MVIEW_NAME. For materialized views created before Oracle8i, Oracle Database attaches the 6-byte prefix SNAP$_. If MVIEW_NAME has more than 19 bytes, then Oracle Database truncates the name to 19 bytes and may add a 4-byte sequence number as a suffix to produce a nonambiguous CONTAINER_NAME.
QUERY LONG   Query that defines the materialized view
QUERY_LEN NUMBER(38)   Length (in bytes) of the defining query
UPDATABLE VARCHAR2(1)   Indicates whether the materialized view is updatable (Y) or not (N)
UPDATE_LOG VARCHAR2(128)   For updatable materialized views, the filename of the update log
MASTER_ROLLBACK_SEG VARCHAR2(128)   Rollback segment for the master site or the master materialized view site
MASTER_LINK VARCHAR2(128)   Database link for the master site or the master materialized view site
REWRITE_ENABLED VARCHAR2(1)   Indicates whether rewrite is enabled (Y) or not (N)
REWRITE_CAPABILITY VARCHAR2(9)   Indicates whether the materialized view is eligible for rewrite, and if so, what rules must be followed:
  • NONE - Materialized view cannot be used for rewrite, because rewrite is disallowed or prevented

  • TEXTMATCH - Defining query of the materialized view contained restrictions on the use of query rewrite

  • GENERAL - Defining query of the materialized view contained no restrictions on the use of query rewrite, so Oracle Database can apply any rewrite rule that is supported

REFRESH_MODE VARCHAR2(6)   Refresh mode of the materialized view:
  • DEMAND - Oracle Database refreshes this materialized view whenever an appropriate refresh procedure is called

  • COMMIT - Oracle Database refreshes this materialized view when a transaction on one of the materialized view's masters commits

  • NEVER - Oracle Database never refreshes this materialized view

REFRESH_METHOD VARCHAR2(8)   Default method used to refresh the materialized view (can be overridden through the API):
  • COMPLETE - Materialized view is completely refreshed from the masters

  • FORCE - Oracle Database performs a fast refresh if possible, otherwise a complete refresh

  • FAST - Oracle Database performs an incremental refresh applying changes that correspond to changes in the masters since the last refresh

  • NEVER - User specified that Oracle Database should not refresh this materialized view

BUILD_MODE VARCHAR2(9)   Indicates how the materialized view was populated during creation:
  • IMMEDIATE - Populated from the masters during creation

  • DEFERRED - Not populated during creation. Must be explicitly populated later by the user.

  • PREBUILT - Populated with an existing table during creation. The relationship of the contents of this prebuilt table to the materialized view's masters is unknown to Oracle Database.

FAST_REFRESHABLE VARCHAR2(18)   Indicates whether the materialized view is eligible for incremental (fast) refresh. Oracle Database calculates this value statically, based on the materialized view definition query:
  • NO - Materialized view is not fast refreshable, and hence is complex

  • DML - Fast refresh is supported only for DML operations

  • DIRLOAD_DML - Fast refresh is supported for both direct loads and DML operations

  • DIRLOAD_LIMITEDDML - Fast refresh is supported for direct loads and a subset of DML operations

LAST_REFRESH_TYPE VARCHAR2(8)   Method used for the most recent refresh:
  • COMPLETE - Most recent refresh was complete

  • FAST - Most recent refresh was fast (incremental)

  • NA - Materialized view has not yet been refreshed (for example, if it was created DEFERRED)

LAST_REFRESH_DATE DATE   Date on which the materialized view was most recently refreshed (blank if not yet populated)
STALENESS VARCHAR2(19)   Relationship between the contents of the materialized view and the contents of the materialized view's masters:
  • FRESH - Materialized view is a read-consistent view of the current state of its masters

  • STALE - Materialized view is out of date because one or more of its masters has changed. If the materialized view was FRESH before it became STALE, then it is a read-consistent view of a former state of its masters.

  • NEEDS_COMPILE - Some object upon which the materialized view depends has changed. An ALTER MATERIALIZED VIEW...COMPILE statement is required to validate this materialized view and compute the staleness of the contents.

  • UNUSABLE - Materialized view is not a read-consistent view of its masters from any point in time

  • UNKNOWN - Oracle Database does not know whether the materialized view is in a read-consistent view of its masters from any point in time (this is the case for materialized views created on prebuilt tables)

  • UNDEFINED - Materialized view has remote masters. The concept of staleness is not defined for such materialized views.

AFTER_FAST_REFRESH VARCHAR2(19)   Specifies the staleness value that will occur if a fast refresh is applied to this materialized view. Its values are the same as for the STALENESS column, plus the value NA, which is used when fast refresh is not applicable to this materialized view.
UNKNOWN_PREBUILT VARCHAR2(1)   Indicates whether the materialized view is prebuilt (Y) or not (N)
UNKNOWN_PLSQL_FUNC VARCHAR2(1)   Indicates whether the materialized view contains PL/SQL functions (Y) or not (N)
UNKNOWN_EXTERNAL_TABLE VARCHAR2(1)   Indicates whether the materialized view contains external tables (Y) or not (N)
UNKNOWN_CONSIDER_FRESH VARCHAR2(1)   Indicates whether the materialized view is considered fresh (Y) or not (N)
UNKNOWN_IMPORT VARCHAR2(1)   Indicates whether the materialized view is imported (Y) or not (N)
UNKNOWN_TRUSTED_FD VARCHAR2(1)   Indicates whether the materialized view uses trusted constraints for refresh (Y) or not (N)
COMPILE_STATE VARCHAR2(19)   Validity of the materialized view with respect to the objects upon which it depends:
  • VALID - Materialized view has been validated without error, and no object upon which it depends has changed since the last validation

  • NEEDS_COMPILE - Some object upon which the materialized view depends has changed. An ALTER MATERIALIZED VIEW...COMPILE statement is required to validate this materialized view.

  • ERROR - Materialized view has been validated with one or more errors

USE_NO_INDEX VARCHAR2(1)   Indicates whether the materialized view was created using the USING NO INDEX clause (Y) or the materialized view was created with the default index (N). The USING NO INDEX clause suppresses the creation of the default index.
STALE_SINCE DATE   Time from when the materialized view became stale
NUM_PCT_TABLES NUMBER   Number of PCT detail tables
NUM_FRESH_PCT_REGIONS NUMBER   Number of fresh PCT partition regions
NUM_STALE_PCT_REGIONS NUMBER   Number of stale PCT partition regions
SEGMENT_CREATED VARCHAR2(3)   Indicates whether the materialized view was created using the SEGMENT CREATION DEFERRED clause. The value is YES if the segment for the materialized view is created and NO if it is not.
EVALUATION_EDITION VARCHAR2(128)   Name of the edition in which editioned objects referenced in an expression column are resolved
UNUSABLE_BEFORE VARCHAR2(128)   Name of the oldest edition in which the stored results of the materialized view's subquery may be used for query rewrite. In editions before the specified edition, the stored results of the materialized view's data are considered unusable. This value is NULL if no such edition is specified.
UNUSABLE_BEGINNING VARCHAR2(128)   Name of the oldest edition in which the stored results of the materialized view's subquery may not be used for query rewrite. The data is unusable for query rewrite in the specified edition and in any descendants of this edition. This value is NULL if no such edition is specified.

See Also: