rusqlite/
config.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
//! Configure database connections

use std::os::raw::c_int;

use crate::error::check;
use crate::ffi;
use crate::{Connection, Result};

/// Database Connection Configuration Options
/// See [Database Connection Configuration Options](https://sqlite.org/c3ref/c_dbconfig_enable_fkey.html) for details.
#[repr(i32)]
#[derive(Copy, Clone, Debug)]
#[allow(non_snake_case, non_camel_case_types)]
#[non_exhaustive]
#[allow(clippy::upper_case_acronyms)]
pub enum DbConfig {
    //SQLITE_DBCONFIG_MAINDBNAME = 1000, /* const char* */
    //SQLITE_DBCONFIG_LOOKASIDE = 1001,  /* void* int int */
    /// Enable or disable the enforcement of foreign key constraints.
    SQLITE_DBCONFIG_ENABLE_FKEY = ffi::SQLITE_DBCONFIG_ENABLE_FKEY,
    /// Enable or disable triggers.
    SQLITE_DBCONFIG_ENABLE_TRIGGER = ffi::SQLITE_DBCONFIG_ENABLE_TRIGGER,
    /// Enable or disable the fts3_tokenizer() function which is part of the
    /// FTS3 full-text search engine extension.
    SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER = ffi::SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER, // 3.12.0
    //SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION = 1005,
    /// In WAL mode, enable or disable the checkpoint operation before closing
    /// the connection.
    SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE = 1006, // 3.16.2
    /// Activates or deactivates the query planner stability guarantee (QPSG).
    SQLITE_DBCONFIG_ENABLE_QPSG = 1007, // 3.20.0
    /// Includes or excludes output for any operations performed by trigger
    /// programs from the output of EXPLAIN QUERY PLAN commands.
    SQLITE_DBCONFIG_TRIGGER_EQP = 1008, // 3.22.0
    /// Activates or deactivates the "reset" flag for a database connection.
    /// Run VACUUM with this flag set to reset the database.
    SQLITE_DBCONFIG_RESET_DATABASE = 1009, // 3.24.0
    /// Activates or deactivates the "defensive" flag for a database connection.
    SQLITE_DBCONFIG_DEFENSIVE = 1010, // 3.26.0
    /// Activates or deactivates the "writable_schema" flag.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_WRITABLE_SCHEMA = 1011, // 3.28.0
    /// Activates or deactivates the legacy behavior of the ALTER TABLE RENAME
    /// command.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_LEGACY_ALTER_TABLE = 1012, // 3.29
    /// Activates or deactivates the legacy double-quoted string literal
    /// misfeature for DML statements only.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_DQS_DML = 1013, // 3.29.0
    /// Activates or deactivates the legacy double-quoted string literal
    /// misfeature for DDL statements.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_DQS_DDL = 1014, // 3.29.0
    /// Enable or disable views.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_ENABLE_VIEW = 1015, // 3.30.0
    /// Activates or deactivates the legacy file format flag.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_LEGACY_FILE_FORMAT = 1016, // 3.31.0
    /// Tells SQLite to assume that database schemas (the contents of the
    /// sqlite_master tables) are untainted by malicious content.
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_TRUSTED_SCHEMA = 1017, // 3.31.0
    /// Sets or clears a flag that enables collection of the
    /// sqlite3_stmt_scanstatus_v2() statistics
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_STMT_SCANSTATUS = 1018, // 3.42.0
    /// Changes the default order in which tables and indexes are scanned
    #[cfg(feature = "modern_sqlite")]
    SQLITE_DBCONFIG_REVERSE_SCANORDER = 1019, // 3.42.0
}

impl Connection {
    /// Returns the current value of a `config`.
    ///
    /// - `SQLITE_DBCONFIG_ENABLE_FKEY`: return `false` or `true` to indicate
    ///   whether FK enforcement is off or on
    /// - `SQLITE_DBCONFIG_ENABLE_TRIGGER`: return `false` or `true` to indicate
    ///   whether triggers are disabled or enabled
    /// - `SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER`: return `false` or `true` to
    ///   indicate whether `fts3_tokenizer` are disabled or enabled
    /// - `SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE`: return `false` to indicate
    ///   checkpoints-on-close are not disabled or `true` if they are
    /// - `SQLITE_DBCONFIG_ENABLE_QPSG`: return `false` or `true` to indicate
    ///   whether the QPSG is disabled or enabled
    /// - `SQLITE_DBCONFIG_TRIGGER_EQP`: return `false` to indicate
    ///   output-for-trigger are not disabled or `true` if it is
    #[inline]
    pub fn db_config(&self, config: DbConfig) -> Result<bool> {
        let c = self.db.borrow();
        unsafe {
            let mut val = 0;
            check(ffi::sqlite3_db_config(
                c.db(),
                config as c_int,
                -1,
                &mut val,
            ))?;
            Ok(val != 0)
        }
    }

    /// Make configuration changes to a database connection
    ///
    /// - `SQLITE_DBCONFIG_ENABLE_FKEY`: `false` to disable FK enforcement,
    ///   `true` to enable FK enforcement
    /// - `SQLITE_DBCONFIG_ENABLE_TRIGGER`: `false` to disable triggers, `true`
    ///   to enable triggers
    /// - `SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER`: `false` to disable
    ///   `fts3_tokenizer()`, `true` to enable `fts3_tokenizer()`
    /// - `SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE`: `false` (the default) to enable
    ///   checkpoints-on-close, `true` to disable them
    /// - `SQLITE_DBCONFIG_ENABLE_QPSG`: `false` to disable the QPSG, `true` to
    ///   enable QPSG
    /// - `SQLITE_DBCONFIG_TRIGGER_EQP`: `false` to disable output for trigger
    ///   programs, `true` to enable it
    #[inline]
    pub fn set_db_config(&self, config: DbConfig, new_val: bool) -> Result<bool> {
        let c = self.db.borrow_mut();
        unsafe {
            let mut val = 0;
            check(ffi::sqlite3_db_config(
                c.db(),
                config as c_int,
                new_val as c_int,
                &mut val,
            ))?;
            Ok(val != 0)
        }
    }
}

#[cfg(test)]
mod test {
    use super::DbConfig;
    use crate::{Connection, Result};

    #[test]
    fn test_db_config() -> Result<()> {
        let db = Connection::open_in_memory()?;

        let opposite = !db.db_config(DbConfig::SQLITE_DBCONFIG_ENABLE_FKEY)?;
        assert_eq!(
            db.set_db_config(DbConfig::SQLITE_DBCONFIG_ENABLE_FKEY, opposite),
            Ok(opposite)
        );
        assert_eq!(
            db.db_config(DbConfig::SQLITE_DBCONFIG_ENABLE_FKEY),
            Ok(opposite)
        );

        let opposite = !db.db_config(DbConfig::SQLITE_DBCONFIG_ENABLE_TRIGGER)?;
        assert_eq!(
            db.set_db_config(DbConfig::SQLITE_DBCONFIG_ENABLE_TRIGGER, opposite),
            Ok(opposite)
        );
        assert_eq!(
            db.db_config(DbConfig::SQLITE_DBCONFIG_ENABLE_TRIGGER),
            Ok(opposite)
        );
        Ok(())
    }
}