73 lines
2.5 KiB
Groff
73 lines
2.5 KiB
Groff
.Dd March 11, 2017
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.Dt SQLITE_LIMIT_LENGTH 3
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.Os
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.Sh NAME
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.Nm SQLITE_LIMIT_LENGTH ,
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.Nm SQLITE_LIMIT_SQL_LENGTH ,
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.Nm SQLITE_LIMIT_COLUMN ,
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.Nm SQLITE_LIMIT_EXPR_DEPTH ,
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.Nm SQLITE_LIMIT_COMPOUND_SELECT ,
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.Nm SQLITE_LIMIT_VDBE_OP ,
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.Nm SQLITE_LIMIT_FUNCTION_ARG ,
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.Nm SQLITE_LIMIT_ATTACHED ,
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.Nm SQLITE_LIMIT_LIKE_PATTERN_LENGTH ,
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.Nm SQLITE_LIMIT_VARIABLE_NUMBER ,
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.Nm SQLITE_LIMIT_TRIGGER_DEPTH ,
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.Nm SQLITE_LIMIT_WORKER_THREADS
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.Nd Run-Time Limit Categories
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.Sh SYNOPSIS
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.Fd #define SQLITE_LIMIT_LENGTH
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.Fd #define SQLITE_LIMIT_SQL_LENGTH
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.Fd #define SQLITE_LIMIT_COLUMN
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.Fd #define SQLITE_LIMIT_EXPR_DEPTH
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.Fd #define SQLITE_LIMIT_COMPOUND_SELECT
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.Fd #define SQLITE_LIMIT_VDBE_OP
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.Fd #define SQLITE_LIMIT_FUNCTION_ARG
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.Fd #define SQLITE_LIMIT_ATTACHED
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.Fd #define SQLITE_LIMIT_LIKE_PATTERN_LENGTH
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.Fd #define SQLITE_LIMIT_VARIABLE_NUMBER
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.Fd #define SQLITE_LIMIT_TRIGGER_DEPTH
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.Fd #define SQLITE_LIMIT_WORKER_THREADS
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.Sh DESCRIPTION
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These constants define various performance limits that can be lowered
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at run-time using sqlite3_limit().
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The synopsis of the meanings of the various limits is shown below.
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Additional information is available at Limits in SQLite.
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.Bl -tag -width Ds
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.It SQLITE_LIMIT_LENGTH
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The maximum size of any string or BLOB or table row, in bytes.
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.It SQLITE_LIMIT_SQL_LENGTH
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The maximum length of an SQL statement, in bytes.
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.It SQLITE_LIMIT_COLUMN
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The maximum number of columns in a table definition or in the result
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set of a SELECT or the maximum number of columns in an index
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or in an ORDER BY or GROUP BY clause.
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.It SQLITE_LIMIT_EXPR_DEPTH
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The maximum depth of the parse tree on any expression.
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.It SQLITE_LIMIT_COMPOUND_SELECT
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The maximum number of terms in a compound SELECT statement.
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.It SQLITE_LIMIT_VDBE_OP
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The maximum number of instructions in a virtual machine program used
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to implement an SQL statement.
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This limit is not currently enforced, though that might be added in
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some future release of SQLite.
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.It SQLITE_LIMIT_FUNCTION_ARG
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The maximum number of arguments on a function.
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.It SQLITE_LIMIT_ATTACHED
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The maximum number of attached databases.
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.It SQLITE_LIMIT_LIKE_PATTERN_LENGTH
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The maximum length of the pattern argument to the LIKE or GLOB
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operators.
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.It SQLITE_LIMIT_VARIABLE_NUMBER
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The maximum index number of any parameter in an SQL statement.
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.It SQLITE_LIMIT_TRIGGER_DEPTH
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The maximum depth of recursion for triggers.
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.It SQLITE_LIMIT_WORKER_THREADS
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The maximum number of auxiliary worker threads that a single prepared statement
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may start.
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.El
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.Pp
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.Sh SEE ALSO
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.Xr sqlite3_stmt 3 ,
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.Xr sqlite3_limit 3
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