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Database Reference
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Disk Structures and Storage
In This Chapter
Dbspace Structure and Storage
Structure of the Root Dbspace
Reserved Pages
Safewrite Area
Structure of a Regular Dbspace
Structure of an Additional Dbspace Chunk
Structure of a Mirror Chunk
Structure of the Chunk Free-List Page
Structure of the Tblspace Tblspace
Tblspace Tblspace Entries
Tblspace Numbers
Tblspace Number Elements
Tblspace Tblspace Size
Tblspace Tblspace Bit-Map Page
Structure of the Database Tblspace
Database Tblspace Number
Database Tblspace Entries
Structure and Allocation of an Extent
Extent Structure
Next-Extent Allocation
Structure and Storage of a Dbspace Page
Rows in Nonfragmented Tables
Rows in Fragmented Tables
Recommendations on Use of Rowid
Data-Row Format and Storage
Structure of Fragmented Tables
Structure of B-Tree Index Pages
Definition of B-Tree Terms
Logical Storage of Indexes
Structure of Bitmap Indexes
Storage of Simple Large Objects
Structure of a Dbspace Blobpage
Simple-Large-Object Storage and the Descriptor
Creation of Simple Large Objects
Deletion or Insertion of Simple Large Objects
Size Limits for Simple Large Objects
Database and Table Creation: What Happens on Disk
Database Creation
Disk-Space Allocation for System Catalog Tables
Tracking of System Catalog Tables
Table Creation
Disk-Space Allocation
Entry in the Tblspace Tblspace
Entries in the System Catalog Tables
Creation of a Temporary Table
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