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[FEAT MERGE] Lob SQL refactoring (Mem-LobLocator, expressions and dbms_lob adaptions)

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Co-authored-by: chaser-ch <chaser.ch@antgroup.com>
This commit is contained in:
obdev
2023-01-28 20:40:15 +08:00
committed by ob-robot
parent 4bb1033505
commit 3d4f554258
350 changed files with 19091 additions and 3918 deletions
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55
src/sql/engine/expr/ob_expr_to_blob.cpp
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@ -16,6 +16,7 @@
#include "sql/session/ob_sql_session_info.h"
#include "objit/common/ob_item_type.h"
#include "lib/oblog/ob_log.h"
#include "sql/engine/expr/ob_expr_lob_utils.h"
namespace oceanbase
{
@ -68,8 +69,60 @@ int ObExprToBlob::eval_to_blob(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
LOG_WARN("eval param failed", K(ret));
} else if (arg->is_null()) {
res.set_null();
} else if (ob_is_blob(expr.args_[0]->datum_meta_.get_type(), expr.args_[0]->datum_meta_.cs_type_)) {
res = *arg; // blob to blob
} else {
res.set_datum(*arg);
ObString raw_string = arg->get_string();
int64_t res_len = raw_string.length();
if (!ob_is_text_tc(expr.args_[0]->datum_meta_.get_type())) { // non-lob to blob
ObTextStringDatumResult str_result(expr.datum_meta_.type_, &expr, &ctx, &res);
if (OB_FAIL(str_result.init(res_len))) {
LOG_WARN("init lob result failed");
} else if (OB_FAIL(str_result.append(raw_string.ptr(), raw_string.length()))) {
LOG_WARN("append lob result failed");
} else {
str_result.set_result();
}
} else { // clob to blob
ObLobLocatorV2 lob(raw_string, expr.args_[0]->obj_meta_.has_lob_header());
if (OB_FAIL(lob.get_lob_data_byte_len(res_len))) {
LOG_WARN("get lob data byte length failed", K(ret), K(lob));
} else {
ObTextStringDatumResult str_result(expr.datum_meta_.type_, &expr, &ctx, &res);
if (OB_FAIL(str_result.init(res_len))) {
LOG_WARN("init lob result failed");
} else {
int64_t off = 0;
ObString v_str;
ObEvalCtx::TempAllocGuard alloc_guard(ctx);
ObIAllocator &calc_alloc = alloc_guard.get_allocator();
ObDatumMeta input_meta = expr.args_[0]->datum_meta_;
bool has_lob_header = expr.args_[0]->obj_meta_.has_lob_header();
ObTextStringIter input_iter(input_meta.type_, input_meta.cs_type_, arg->get_string(), has_lob_header);
ObTextStringIterState state;
ObString src_block_data;
if (OB_FAIL(input_iter.init(0, NULL, &calc_alloc))) {
LOG_WARN("init input_iter failed ", K(ret), K(input_iter));
}
while (OB_SUCC(ret)
&& (state = input_iter.get_next_block(src_block_data)) == TEXTSTRING_ITER_NEXT) {
if (OB_FAIL(str_result.append(src_block_data))) {
LOG_WARN("str_result append failed", K(ret), K(src_block_data));
} else {
off += src_block_data.length();
}
}
if (OB_FAIL(ret)) {
} else if (state != TEXTSTRING_ITER_NEXT && state != TEXTSTRING_ITER_END) {
ret = OB_INVALID_DATA;
LOG_WARN("iter state invalid", K(ret), K(state));
} else {
str_result.set_result();
OB_ASSERT(off == res_len);
}
}
}
}
}
return ret;
}