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Merge branch '2.3' into 2.4

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This commit is contained in:
Johan Wikman
2019-09-16 09:50:05 +03:00
parent 31029eaec8 60c33b149c
commit 5e2d9f599b
7 changed files with 110 additions and 18 deletions
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49
query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
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@ -135,6 +135,8 @@ extern void maxscaleUse(Parse*, Token*);
extern void maxscale_update_function_info(const char* name, const Expr* pExpr);
extern void maxscale_set_type_mask(unsigned int type_mask);
static Expr* maxscale_create_pseudo_limit(Parse* pParse, Token* pToken, ExprSpan* pLimit);
// Exposed utility functions
void exposed_sqlite3ExprDelete(sqlite3 *db, Expr *pExpr)
{
@ -1528,12 +1530,14 @@ cmd ::= with(C) DELETE FROM fullname(X) indexed_opt(I) where_opt(W)
sqlite3WithPush(pParse, C, 1);
sqlite3SrcListIndexedBy(pParse, X, &I);
#ifdef MAXSCALE
// We are not interested in the order by or limit information.
// Thus we simply delete it. sqlite also has some limitations, which
// will not bother us if we hide the information from it.
sqlite3ExprListDelete(pParse->db, O);
sqlite3ExprDelete(pParse->db, L.pLimit);
sqlite3ExprDelete(pParse->db, L.pOffset);
Token token;
ExprSpan limit;
if (O && !L.pLimit) {
L.pLimit = maxscale_create_pseudo_limit(pParse, &token, &limit);
sqlite3ExprDelete(pParse->db, L.pOffset);
L.pOffset = 0;
}
W = sqlite3LimitWhere(pParse, X, W, O, L.pLimit, L.pOffset, "DELETE");
mxs_sqlite3DeleteFrom(pParse,X,W,0);
#else
W = sqlite3LimitWhere(pParse, X, W, O, L.pLimit, L.pOffset, "DELETE");
@ -1690,12 +1694,15 @@ cmd ::= with(C) UPDATE orconf(R) fullname(X) indexed_opt(I) SET setlist(Y)
sqlite3SrcListIndexedBy(pParse, X, &I);
sqlite3ExprListCheckLength(pParse,Y,"set list");
#ifdef MAXSCALE
// We are not interested in the order by or limit information.
// Thus we simply delete it. sqlite also has some limitations, which
// will not bother us if we hide the information from it.
sqlite3ExprListDelete(pParse->db, O);
sqlite3ExprDelete(pParse->db, L.pLimit);
sqlite3ExprDelete(pParse->db, L.pOffset);
Token token;
ExprSpan limit;
if (O && !L.pLimit) {
L.pLimit = maxscale_create_pseudo_limit(pParse, &token, &limit);
sqlite3ExprDelete(pParse->db, L.pOffset);
L.pOffset = 0;
}
W = sqlite3LimitWhere(pParse, X, W, O, L.pLimit, L.pOffset, "UPDATE");
mxs_sqlite3Update(pParse,X,Y,W,R);
#else
W = sqlite3LimitWhere(pParse, X, W, O, L.pLimit, L.pOffset, "UPDATE");
@ -3525,3 +3532,21 @@ cmd ::= DECLARE. {
}
%endif
%include {
static Expr* maxscale_create_pseudo_limit(Parse* pParse, Token* pToken, ExprSpan* pLimit)
{
// sqlite3 does not accept a ORDER BY without LIMIT, but MariaDB
// does. Thus, to make sqlite3LimitWhere return non-NULL we need
// to inject a LIMIT if there is none. We use a value of -1 to
// tell update_field_infos_from_select() that this LIMIT should
// not be counted as a limiting clause.
static char one[] = "-1";
pToken->z = one;
pToken->n = 1;
spanExpr(pLimit, pParse, TK_INTEGER, pToken);
return pLimit->pExpr;
}
}