forked from mirror/go-sqlite3
106 lines
3.9 KiB
Go
106 lines
3.9 KiB
Go
// Copyright (C) 2018 The Go-SQLite3 Authors.
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//
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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// +build cgo
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package sqlite3
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/*
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#ifndef USE_LIBSQLITE3
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#include <sqlite3-binding.h>
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#else
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#include <sqlite3.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#ifdef SQLITE_LIMIT_WORKER_THREADS
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# define _SQLITE_HAS_LIMIT
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# define SQLITE_LIMIT_LENGTH 0
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# define SQLITE_LIMIT_SQL_LENGTH 1
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# define SQLITE_LIMIT_COLUMN 2
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# define SQLITE_LIMIT_EXPR_DEPTH 3
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# define SQLITE_LIMIT_COMPOUND_SELECT 4
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# define SQLITE_LIMIT_VDBE_OP 5
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# define SQLITE_LIMIT_FUNCTION_ARG 6
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# define SQLITE_LIMIT_ATTACHED 7
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# define SQLITE_LIMIT_LIKE_PATTERN_LENGTH 8
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# define SQLITE_LIMIT_VARIABLE_NUMBER 9
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# define SQLITE_LIMIT_TRIGGER_DEPTH 10
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# define SQLITE_LIMIT_WORKER_THREADS 11
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# else
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# define SQLITE_LIMIT_WORKER_THREADS 11
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#endif
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static int _sqlite3_limit(sqlite3* db, int limitId, int newLimit) {
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#ifndef _SQLITE_HAS_LIMIT
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return -1;
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#else
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return sqlite3_limit(db, limitId, newLimit);
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#endif
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}
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*/
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import "C"
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// Run-Time Limit Categories.
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// See: http://www.sqlite.org/c3ref/c_limit_attached.html
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const (
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// SQLITE_LIMIT_LENGTH defines the maximum size of any string or BLOB or table row, in bytes.
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SQLITE_LIMIT_LENGTH = C.SQLITE_LIMIT_LENGTH
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// SQLITE_LIMIT_SQL_LENGTH defines the maximum length of an SQL statement, in bytes.
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SQLITE_LIMIT_SQL_LENGTH = C.SQLITE_LIMIT_SQL_LENGTH
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// SQLITE_LIMIT_COLUMN defines the maximum number of columns in a table definition
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// or in the result set of a SELECT or the maximum number of columns
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// in an index or in an ORDER BY or GROUP BY clause.
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SQLITE_LIMIT_COLUMN = C.SQLITE_LIMIT_COLUMN
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// SQLITE_LIMIT_EXPR_DEPTH defines the maximum depth of the parse tree on any expression.
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SQLITE_LIMIT_EXPR_DEPTH = C.SQLITE_LIMIT_EXPR_DEPTH
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// SQLITE_LIMIT_COMPOUND_SELECT defines the maximum number of terms in a compound SELECT statement.
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SQLITE_LIMIT_COMPOUND_SELECT = C.SQLITE_LIMIT_COMPOUND_SELECT
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// SQLITE_LIMIT_VDBE_OP defines the maximum number of instructions
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// in a virtual machine program used to implement an SQL statement.
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// If sqlite3_prepare_v2() or the equivalent tries to allocate space
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// for more than this many opcodes in a single prepared statement,
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// an SQLITE_NOMEM error is returned.
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SQLITE_LIMIT_VDBE_OP = C.SQLITE_LIMIT_VDBE_OP
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// SQLITE_LIMIT_FUNCTION_ARG defines the maximum number of arguments on a function.
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SQLITE_LIMIT_FUNCTION_ARG = C.SQLITE_LIMIT_FUNCTION_ARG
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// SQLITE_LIMIT_ATTACHED defines the maximum number of attached databases.
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SQLITE_LIMIT_ATTACHED = C.SQLITE_LIMIT_ATTACHED
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// SQLITE_LIMIT_LIKE_PATTERN_LENGTH defines the maximum length of the pattern argument to the LIKE or GLOB operators.
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SQLITE_LIMIT_LIKE_PATTERN_LENGTH = C.SQLITE_LIMIT_LIKE_PATTERN_LENGTH
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// SQLITE_LIMIT_VARIABLE_NUMBER defines the maximum index number of any parameter in an SQL statement.
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SQLITE_LIMIT_VARIABLE_NUMBER = C.SQLITE_LIMIT_VARIABLE_NUMBER
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// SQLITE_LIMIT_TRIGGER_DEPTH defines the maximum depth of recursion for triggers.
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SQLITE_LIMIT_TRIGGER_DEPTH = C.SQLITE_LIMIT_TRIGGER_DEPTH
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// SQLITE_LIMIT_WORKER_THREADS defines the maximum number
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// of auxiliary worker threads that a single prepared statement may start.
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SQLITE_LIMIT_WORKER_THREADS = C.SQLITE_LIMIT_WORKER_THREADS
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)
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// GetLimit returns the current value of a run-time limit.
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// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
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func (c *SQLiteConn) GetLimit(id int) int {
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return int(C._sqlite3_limit(c.db, C.int(id), -1))
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}
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// SetLimit changes the value of a run-time limits.
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// Then this method returns the prior value of the limit.
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// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
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func (c *SQLiteConn) SetLimit(id int, newVal int) int {
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return int(C._sqlite3_limit(c.db, C.int(id), C.int(newVal)))
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}
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