to persistent SQL statements using SQLITE_STATIC, the binding is replaced with
an SQL NULL before the buffer is freed. Otherwise, a user may obtain a pointer
to the persistent statement using sqlite3_next_stmt() and attempt to access
the freed buffer using sqlite3_expanded_sql() or similar.
FossilOrigin-Name: 2a5f813bc61f9e780f2ccbda425611f65ad523b6d486a1e5e2b9d5e9f1d260a2
to ensure the shadow tables used by an rtree virtual table are internally
consistent.
FossilOrigin-Name: dde0bb3eab1316c3247b1755594527ca70955aab4ad4907190731f7ec092b327
