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Overview
| Comment: | Fix a typo in shared_schema.md. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | reuse-schema |
| Files: | files | file ages | folders |
| SHA3-256: |
e47a5aea76560e86e5417fea9e2219ec |
| User & Date: | dan 2019-02-14 17:59:36 |
Context
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2019-02-14
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| 18:38 | Change the name of the SQLITE_OPEN_REUSE_SCHEMA flag to SQLITE_OPEN_SHARED_SCHEMA. (check-in: 7257fcc8 user: dan tags: reuse-schema) | |
| 17:59 | Fix a typo in shared_schema.md. (check-in: e47a5aea user: dan tags: reuse-schema) | |
| 17:51 | Add documentation file doc/shared_schema.md to describe the change on this branch. (check-in: a5f8067d user: dan tags: reuse-schema) | |
Changes
Changes to doc/shared_schema.md.
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For SQLITE_OPEN_SHARED_SCHEMA connections, the SQLITE_DBSTATUS_SCHEMA_USED sqlite3_db_used() distributes the memory used for a shared schema object evenly between all database connections that share it. ## Implementation Notes A single Schema object is never used by more than database simultaneously, regardless of whether or not those databases are attached to the same or different database handles. Instead, a pool of schema objects is maintained for each unique sqlite_master-contents/schema-cookie combination opened within the process. Each time database schemas are required by a connection, for example as part of an sqlite3_prepare\*(), sqlite3_blob_open() or sqlite3_blob_open() call, it obtains the minimum number of schemas required from the various schema-pools, returning |
| |
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 |
For SQLITE_OPEN_SHARED_SCHEMA connections, the
SQLITE_DBSTATUS_SCHEMA_USED sqlite3_db_used() distributes
the memory used for a shared schema object evenly between all database
connections that share it.
## Implementation Notes
A single Schema object is never used by more than one database simultaneously,
regardless of whether or not those databases are attached to the same or
different database handles. Instead, a pool of schema objects is maintained
for each unique sqlite_master-contents/schema-cookie combination
opened within the process. Each time database schemas are required by a
connection, for example as part of an sqlite3_prepare\*(),
sqlite3_blob_open() or sqlite3_blob_open() call, it obtains
the minimum number of schemas required from the various schema-pools, returning
|