support sqlite3_limit to get/set run time limit

sqlite3.go

@@ -827,6 +827,36 @@ func (c *SQLiteConn) prepare(ctx context.Context, query string) (driver.Stmt, er
 	return ss, nil
 }
 
+// Run-Time Limit Categories.
+// See: http://www.sqlite.org/c3ref/c_limit_attached.html
+const (
+	SQLITE_LIMIT_LENGTH              = C.SQLITE_LIMIT_LENGTH
+	SQLITE_LIMIT_SQL_LENGTH          = C.SQLITE_LIMIT_SQL_LENGTH
+	SQLITE_LIMIT_COLUMN              = C.SQLITE_LIMIT_COLUMN
+	SQLITE_LIMIT_EXPR_DEPTH          = C.SQLITE_LIMIT_EXPR_DEPTH
+	SQLITE_LIMIT_COMPOUND_SELECT     = C.SQLITE_LIMIT_COMPOUND_SELECT
+	SQLITE_LIMIT_VDBE_OP             = C.SQLITE_LIMIT_VDBE_OP
+	SQLITE_LIMIT_FUNCTION_ARG        = C.SQLITE_LIMIT_FUNCTION_ARG
+	SQLITE_LIMIT_ATTACHED            = C.SQLITE_LIMIT_ATTACHED
+	SQLITE_LIMIT_LIKE_PATTERN_LENGTH = C.SQLITE_LIMIT_LIKE_PATTERN_LENGTH
+	SQLITE_LIMIT_VARIABLE_NUMBER     = C.SQLITE_LIMIT_VARIABLE_NUMBER
+	SQLITE_LIMIT_TRIGGER_DEPTH       = C.SQLITE_LIMIT_TRIGGER_DEPTH
+	SQLITE_LIMIT_WORKER_THREADS      = C.SQLITE_LIMIT_WORKER_THREADS
+)
+
+// GetLimit returns the current value of a run-time limit.
+// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
+func (c *SQLiteConn) GetLimit(id int) int {
+	return int(C.sqlite3_limit(c.db, C.int(id), -1))
+}
+
+// SetLimit changes the value of a run-time limits.
+// Then this method returns the prior value of the limit.
+// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
+func (c *SQLiteConn) SetLimit(id int, newVal int) int {
+	return int(C.sqlite3_limit(c.db, C.int(id), C.int(newVal)))
+}
+
 // Close the statement.
 func (s *SQLiteStmt) Close() error {
 	s.mu.Lock()