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switch to sqlite3_prepare_v3 and supply default prepFlags

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for long-lived prepared statements in datastore/sqlite_datastore.nim use
`prepFlags = SQLITE_PREPARE_PERSISTENT`

closes #13
This commit is contained in:
Michael Bradley, Jr 2022-07-08 15:46:19 -05:00 committed by Michael Bradley
parent 96695fed47
commit fb5ce62532
2 changed files with 18 additions and 8 deletions
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12
datastore/sqlite.nim
View File

@ -161,23 +161,27 @@ template open*(
proc prepare*[Params, Res](
T: type SQLiteStmt[Params, Res],
env: SQLite,
stmt: string): ?!T =
stmt: string,
prepFlags: cuint = 0): ?!T =
var
s: RawStmtPtr
checkErr sqlite3_prepare_v2(env, stmt.cstring, stmt.len.cint, addr s, nil)
checkErr sqlite3_prepare_v3(
env, stmt.cstring, stmt.len.cint, prepFlags, addr s, nil)
success T(s)
template prepare*(
env: SQLite,
q: string): RawStmtPtr =
q: string,
prepFlags: cuint = 0): RawStmtPtr =
var
s: RawStmtPtr
checkErr sqlite3_prepare_v2(env, q.cstring, q.len.cint, addr s, nil)
checkErr sqlite3_prepare_v3(
env, q.cstring, q.len.cint, prepFlags, addr s, nil)
s

14
datastore/sqlite_datastore.nim
View File

@ -227,11 +227,17 @@ proc new*(
if not readOnly:
checkExec(env.val, createStmtStr)
deleteStmt = ? DeleteStmt.prepare(env.val, deleteStmtStr)
putStmt = ? PutStmt.prepare(env.val, putStmtStr)
deleteStmt = ? DeleteStmt.prepare(
env.val, deleteStmtStr, SQLITE_PREPARE_PERSISTENT)
containsStmt = ? ContainsStmt.prepare(env.val, containsStmtStr)
getStmt = ? GetStmt.prepare(env.val, getStmtStr)
putStmt = ? PutStmt.prepare(
env.val, putStmtStr, SQLITE_PREPARE_PERSISTENT)
containsStmt = ? ContainsStmt.prepare(
env.val, containsStmtStr, SQLITE_PREPARE_PERSISTENT)
getStmt = ? GetStmt.prepare(
env.val, getStmtStr, SQLITE_PREPARE_PERSISTENT)
# if a readOnly/existing database does not satisfy the expected schema
# `pepare()` will fail and `new` will return an error with message