Small. Fast. Reliable.
Choose any three.
#define SQLITE_LIMIT_LENGTH 0
#define SQLITE_LIMIT_SQL_LENGTH 1
#define SQLITE_LIMIT_COLUMN 2
#define SQLITE_LIMIT_EXPR_DEPTH 3
#define SQLITE_LIMIT_COMPOUND_SELECT 4
#define SQLITE_LIMIT_VDBE_OP 5
#define SQLITE_LIMIT_FUNCTION_ARG 6
#define SQLITE_LIMIT_ATTACHED 7
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH 8
#define SQLITE_LIMIT_VARIABLE_NUMBER 9
#define SQLITE_LIMIT_TRIGGER_DEPTH 10
#define SQLITE_LIMIT_WORKER_THREADS 11
These constants define various performance limits
that can be lowered at run-time using sqlite3_limit().
The synopsis of the meanings of the various limits is shown below.
Additional information is available at Limits in SQLite.
- SQLITE_LIMIT_LENGTH
- The maximum size of any string or BLOB or table row, in bytes.
-
- SQLITE_LIMIT_SQL_LENGTH
- The maximum length of an SQL statement, in bytes.
- SQLITE_LIMIT_COLUMN
- The maximum number of columns in a table definition or in the
result set of a SELECT or the maximum number of columns in an index
or in an ORDER BY or GROUP BY clause.
- SQLITE_LIMIT_EXPR_DEPTH
- The maximum depth of the parse tree on any expression.
- SQLITE_LIMIT_COMPOUND_SELECT
- The maximum number of terms in a compound SELECT statement.
- SQLITE_LIMIT_VDBE_OP
- The maximum number of instructions in a virtual machine program
used to implement an SQL statement. If sqlite3_prepare_v2() or
the equivalent tries to allocate space for more than this many opcodes
in a single prepared statement, an SQLITE_NOMEM error is returned.
- SQLITE_LIMIT_FUNCTION_ARG
- The maximum number of arguments on a function.
- SQLITE_LIMIT_ATTACHED
- The maximum number of attached databases.
- SQLITE_LIMIT_LIKE_PATTERN_LENGTH
- The maximum length of the pattern argument to the LIKE or
GLOB operators.
- SQLITE_LIMIT_VARIABLE_NUMBER
- The maximum index number of any parameter in an SQL statement.
- SQLITE_LIMIT_TRIGGER_DEPTH
- The maximum depth of recursion for triggers.
- SQLITE_LIMIT_WORKER_THREADS
- The maximum number of auxiliary worker threads that a single
prepared statement may start.
See also lists of
Objects,
Constants, and
Functions.