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[BUGFIX]fix lob bugs

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This commit is contained in:
skylhd
2023-05-10 13:57:06 +00:00
committed by ob-robot
parent c579d88403
commit cb396c38f2
3 changed files with 31 additions and 15 deletions
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39
src/sql/engine/expr/ob_expr_cast.cpp
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@ -273,22 +273,33 @@ bool ObExprCast::check_cast_allowed(const ObObjType orig_type,
bool res = true;
ObObjTypeClass ori_tc = ob_obj_type_class(orig_type);
ObObjTypeClass expect_tc = ob_obj_type_class(expect_type);
if (is_oracle_mode() && is_explicit_cast) {
// can't cast lob to other type except char/varchar/nchar/nvarchar2/raw. clob to raw not allowed too.
if (ObLobTC == ori_tc || ObTextTC == ori_tc) {
if (expect_tc == ObJsonTC) {
/* oracle mode, json text use lob store */
} else if (ObStringTC == expect_tc) {
// do nothing
} else if (ObRawTC == expect_tc) {
res = CS_TYPE_BINARY == orig_cs_type;
} else {
bool is_expect_lob_tc = (ObLobTC == expect_tc || ObTextTC == expect_tc);
bool is_ori_lob_tc = (ObLobTC == ori_tc || ObTextTC == ori_tc);
if (is_oracle_mode()) {
if (is_explicit_cast) {
// can't cast lob to other type except char/varchar/nchar/nvarchar2/raw. clob to raw not allowed too.
if (is_ori_lob_tc) {
if (expect_tc == ObJsonTC) {
/* oracle mode, json text use lob store */
} else if (ObStringTC == expect_tc) {
// do nothing
} else if (ObRawTC == expect_tc) {
res = CS_TYPE_BINARY == orig_cs_type;
} else {
res = false;
}
}
// any type to lob type not allowed.
if (is_expect_lob_tc) {
res = false;
}
}
// any type to lob type not allowed.
if (ObLobTC == expect_tc || ObTextTC == expect_tc) {
res = false;
} else {
// BINARY FLOAT/DOUBLE not allow cast lob whether explicit
if (is_ori_lob_tc) {
if (expect_tc == ObFloatTC || expect_tc == ObDoubleTC) {
res = false;
}
}
}
}
return res;