NAME

SQLITE_LIMIT_LENGTH, SQLITE_LIMIT_SQL_LENGTH, SQLITE_LIMIT_COLUMN, SQLITE_LIMIT_EXPR_DEPTH, SQLITE_LIMIT_COMPOUND_SELECT, SQLITE_LIMIT_VDBE_OP, SQLITE_LIMIT_FUNCTION_ARG, SQLITE_LIMIT_ATTACHED, SQLITE_LIMIT_LIKE_PATTERN_LENGTH, SQLITE_LIMIT_VARIABLE_NUMBER, SQLITE_LIMIT_TRIGGER_DEPTH, SQLITE_LIMIT_WORKER_THREADS — run-Time limit categories

SYNOPSIS

#include <sqlite3.h>

#define SQLITE_LIMIT_LENGTH
#define SQLITE_LIMIT_SQL_LENGTH
#define SQLITE_LIMIT_COLUMN
#define SQLITE_LIMIT_EXPR_DEPTH
#define SQLITE_LIMIT_COMPOUND_SELECT
#define SQLITE_LIMIT_VDBE_OP
#define SQLITE_LIMIT_FUNCTION_ARG
#define SQLITE_LIMIT_ATTACHED
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH
#define SQLITE_LIMIT_VARIABLE_NUMBER
#define SQLITE_LIMIT_TRIGGER_DEPTH
#define SQLITE_LIMIT_WORKER_THREADS

DESCRIPTION

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.

IMPLEMENTATION NOTES

These declarations were extracted from the interface documentation at line 4068.

#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

SEE ALSO

sqlite3_limit(3), sqlite3_prepare(3), sqlite3_stmt(3)