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[BUGFIX] fix substr memcpy overlap

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skylhd 2023-07-04 02:42:29 +00:00 committed by ob-robot
parent fa8ee1586e
commit 471cfeb36d
1 changed files with 2 additions and 1 deletions
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3
src/sql/engine/expr/ob_expr_substrb.cpp
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@ -468,7 +468,8 @@ int ObExprSubstrb::calc_substrb_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum
ObString inrow_result;
if (OB_FAIL(calc(inrow_result, src_block_data, start_int, len_int, cs_type, data_buf))) {
LOG_WARN("get substr failed", K(ret));
} else if (OB_FAIL(output_result.append(inrow_result))) {
} else if (FALSE_IT(MEMMOVE(buf, inrow_result.ptr(), inrow_result.length()))) {
} else if (OB_FAIL(output_result.lseek(inrow_result.length(), 0))) {
LOG_WARN("Lob: append result failed", K(ret), K(output_result), K(src_block_data));
}
// outrow lobs, only use calc for handle invalid bytes