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MXS-2699 Accept '_[character_set] hex' as string

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The purpose is to recognize e.g. /_utf8mb4 0xD091D092D093/ as
a valid string. The rule actually accepts /id integer/, but in
case the statement is something else but an '_' immediately
followed by a character set, followed by a hex number, it will
be rejected by the server so no harm done.
This commit is contained in:
Johan Wikman
2019-09-26 16:51:21 +03:00
parent c01ecfed05
commit a9f07844b3
1 changed files with 7 additions and 0 deletions
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7
query_classifier/qc_sqlite/sqlite-src-3110100/src/parse.y
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@ -1926,6 +1926,13 @@ expr(A) ::= VARIABLE(X). {
spanSet(&A, &X, &X); spanSet(&A, &X, &X);
} }
%ifdef MAXSCALE %ifdef MAXSCALE
expr(A) ::= id(X) INTEGER(Y). {
// The sole purpose of this is to interpret something like '_utf8mb4 0xD091D092D093'
// as a string. It does not matter that any identifier followed by an integer will
// be interpreted as a string, as invalid usage will be caught by the server.
A.pExpr = sqlite3PExpr(pParse, TK_STRING, 0, 0, &Y);
spanSet(&A, &X, &Y);
}
expr(A) ::= VARIABLE(X) variable_tail(Y). { expr(A) ::= VARIABLE(X) variable_tail(Y). {
// As we won't be executing any queries, we do not need to do // As we won't be executing any queries, we do not need to do
// the things that are done above. // the things that are done above.