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Overview
| Comment: | Expand on the comment above OP_Destroy to explain why it throws an error if there are any active reader VMs. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
b9a8c2b9bec9f537b2d5aff6659a5748 |
| User & Date: | dan 2017-04-08 14:11:47 |
Context
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2017-04-08
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| 18:18 | Disallow leading zeros on numeric constants in JSON. Fix for ticket [b93be8729a895a528e2] check-in: 204e72f0 user: drh tags: trunk | |
| 14:11 | Expand on the comment above OP_Destroy to explain why it throws an error if there are any active reader VMs. check-in: b9a8c2b9 user: dan tags: trunk | |
| 13:52 | Have the rtree module close any open blob-handle within the xSavepoint method. This prevents such an open blob handle from interfering with DROP TABLE operations. check-in: fa4416ad user: dan tags: trunk | |
Changes
Changes to src/vdbe.c.
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** P3==1 then the table to be clear is in the auxiliary database file ** that is used to store tables create using CREATE TEMPORARY TABLE. ** ** If AUTOVACUUM is enabled then it is possible that another root page ** might be moved into the newly deleted root page in order to keep all ** root pages contiguous at the beginning of the database. The former ** value of the root page that moved - its value before the move occurred - ** is stored in register P2. If no page ** movement was required (because the table being dropped was already ** the last one in the database) then a zero is stored in register P2. ** If AUTOVACUUM is disabled then a zero is stored in register P2. ** ** See also: Clear */ case OP_Destroy: { /* out2 */ int iMoved; int iDb; |
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** P3==1 then the table to be clear is in the auxiliary database file ** that is used to store tables create using CREATE TEMPORARY TABLE. ** ** If AUTOVACUUM is enabled then it is possible that another root page ** might be moved into the newly deleted root page in order to keep all ** root pages contiguous at the beginning of the database. The former ** value of the root page that moved - its value before the move occurred - ** is stored in register P2. If no page movement was required (because the ** table being dropped was already the last one in the database) then a ** zero is stored in register P2. If AUTOVACUUM is disabled then a zero ** is stored in register P2. ** ** This opcode throws an error if there are any active reader VMs when ** it is invoked. This is done to avoid the difficulty associated with ** updating existing cursors when a root page is moved in an AUTOVACUUM ** database. This error is thrown even if the database is not an AUTOVACUUM ** db in order to avoid introducing an incompatibility between autovacuum ** and non-autovacuum modes. ** ** See also: Clear */ case OP_Destroy: { /* out2 */ int iMoved; int iDb; |