Module vtab

Expand description

Create virtual tables.

Follow these steps to create your own virtual table:

Write implementation of VTab and VTabCursor traits.
Create an instance of the Module structure specialized for VTab impl. from step 1.
Register your Module structure using Connection::create_module.
Run a CREATE VIRTUAL TABLE command that specifies the new module in the USING clause.

Structs§

Context: Context is used by VTabCursor::column to specify the cell value.
IndexConstraint: WHERE clause constraint.
IndexConstraintAndUsageIter: Iterate on index constraint and its associated usage.
IndexConstraintIter: feature = "vtab"
IndexConstraintUsage: Information about what parameters to pass to VTabCursor::filter.
IndexFlags: Virtual table scan flags See Function Flags for details.
IndexInfo: Pass information into and receive the reply from the VTab::best_index method.
Module: Virtual table module
OrderBy: A column of the ORDER BY clause.
OrderByIter: feature = "vtab"
VTabConnection: feature = "vtab"
ValueIter: Values iterator.
Values: Wrapper to VTabCursor::filter arguments, the values requested by VTab::best_index.
sqlite3_vtab
sqlite3_vtab_cursor

IndexConstraintOp: Index constraint operator. See Virtual Table Constraint Operator Codes for details.
VTabConfig: Virtual table configuration options
VTabKind: Virtual table kind

CreateVTab: Read-only virtual table instance trait.
TransactionVTab: Writable virtual table instance trait with transaction support trait.
UpdateVTab: Writable virtual table instance trait.
VTab: Eponymous-only virtual table instance trait.
VTabCursor: Virtual table cursor trait.

dequote: Dequote string
eponymous_only_module: Create an eponymous only virtual table implementation.
escape_double_quote: Escape double-quote (") character occurrences by doubling them ("").
parameter: <param_name>=['"]?<param_value>['"]? => (<param_name>, <param_value>)
parse_boolean: The boolean can be one of:
read_only_module: Create a read-only virtual table implementation.
update_module: Create a modifiable virtual table implementation.
update_module_with_tx: Create a modifiable virtual table implementation with support for transactions.