Virtual Table Configuration Options

Virtual Table Configuration Options

#define SQLITE_VTAB_CONSTRAINT_SUPPORT 1

These macros define the various options to the sqlite3_vtab_config() interface that virtual table implementations can use to customize and optimize their behavior.

SQLITE_VTAB_CONSTRAINT_SUPPORT

Calls of the form sqlite3_vtab_config(db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported, where X is an integer. If X is zero, then the virtual table whose xCreate or xConnect method invoked sqlite3_vtab_config() does not support constraints. In this configuration (which is the default) if a call to the 登录查看完整内容