whitescan safety hole: mainly uninitialized variables

deps/oblib/src/lib/json_type/ob_json_base.cpp

@@ -1938,7 +1938,7 @@ int ObIJsonBase::to_number(ObIAllocator *allocator, number::ObNumber &number) co
 int ObIJsonBase::to_datetime(int64_t &value) const
 {
   INIT_SUCC(ret);
-  int64_t datetime;
+  int64_t datetime = 0;
 
   switch (json_type()) {
     case ObJsonNodeType::J_DATETIME:
@@ -1987,7 +1987,7 @@ int ObIJsonBase::to_datetime(int64_t &value) const
 int ObIJsonBase::to_date(int32_t &value) const
 {
   INIT_SUCC(ret);
-  int32_t date;
+  int32_t date = 0;
 
   switch (json_type()) {
     case ObJsonNodeType::J_DATETIME:
@@ -2034,7 +2034,7 @@ int ObIJsonBase::to_date(int32_t &value) const
 int ObIJsonBase::to_time(int64_t &value) const
 {
   INIT_SUCC(ret);
-  int64_t time;
+  int64_t time = 0;
 
   switch (json_type()) {
     case ObJsonNodeType::J_TIME: {
@@ -2079,7 +2079,7 @@ int ObIJsonBase::to_time(int64_t &value) const
 int ObIJsonBase::to_bit(uint64_t &value) const
 {
   INIT_SUCC(ret);
-  uint64_t bit;
+  uint64_t bit = 0;
   const ObJsonNodeType j_type = json_type();
   ObDTMode dt_mode = 0;
 
@@ -2839,7 +2839,7 @@ int ObJsonBaseUtil::string_to_bit(ObString &str, uint64_t &value)
 {
   INIT_SUCC(ret);
 
-  uint64_t bit;
+  uint64_t bit = 0;
   int32_t bit_len = 0;
 
   if (OB_FAIL(ObJsonBaseUtil::get_bit_len(str, bit_len))) {

deps/oblib/src/lib/json_type/ob_json_bin.cpp

@@ -3305,7 +3305,7 @@ int ObJsonBin::remove_v0(size_t index)
   ObJsonNodeType node_type = this->json_type();
   ObJBVerType ver_type = this->get_vertype();
   // 1. move into element index, get used bytes
-  uint64_t used_bytes;
+  uint64_t used_bytes = 0;
   if (OB_FAIL(this->element(index))) {
     LOG_WARN("failed to get element ", K(index), K(ret));
   } else {

deps/oblib/src/lib/number/ob_number_v2.cpp

@@ -5067,7 +5067,7 @@ int ObNumber::mul_v3(const ObNumber& other, ObNumber& value, ObIAllocator& alloc
     int offset = 0;
     bool check_sum_len = true;
 
-    uint32_t tmp_res_digits[OB_CALC_BUFFER_SIZE];
+    uint32_t tmp_res_digits[OB_CALC_BUFFER_SIZE] = {0};
     uint32_t* res_digits = NULL;
     if (strict_mode) {
       res_digits = tmp_res_digits;

src/sql/engine/expr/ob_expr_inet.cpp

@@ -24,7 +24,7 @@ int ObExprInetCommon::str_to_ipv4(int len, const char *str, bool& is_ip_format_i
 {
   is_ip_format_invalid = false;
   int ret = OB_SUCCESS;
-  //Shortest IPv4 address："x.x.x.x"，length:7
+  //Shortest IPv4 address:"x.x.x.x",length:7
   if (7 > len || INET_ADDRSTRLEN - 1 < len) {
     is_ip_format_invalid = true;
     LOG_WARN("ip format invalid, too short or too long", K(len));
@@ -33,6 +33,7 @@ int ObExprInetCommon::str_to_ipv4(int len, const char *str, bool& is_ip_format_i
     LOG_WARN("ip_str or ipv4addr is null", K(ret), K(str), K(ipv4addr));
   } else {
     unsigned char byte_addr[4];
+    memset(byte_addr,0,sizeof(byte_addr));
     int dotcnt = 0, numcnt = 0;
     int byte = 0;
     char c;
@@ -89,7 +90,7 @@ int ObExprInetCommon::str_to_ipv6(int len, const char *str, bool& is_ip_format_i
   int ret = OB_SUCCESS;
   is_ip_format_invalid = false;
   //Ipv6 length of mysql support: 2~39
-  //Shortest IPv6 address："::"，length:2
+  //Shortest IPv6 address:"::",length:2
   if (2 > len || INET6_ADDRSTRLEN - 1 < len) {
     is_ip_format_invalid = true;
     LOG_WARN("ip format invalid, too short or too long", K(len));

src/sql/engine/expr/ob_expr_json_contains_path.cpp

@@ -83,7 +83,7 @@ int ObExprJsonContainsPath::eval_json_contains_path(const ObExpr &expr,
     LOG_WARN("get_json_doc failed", K(ret));
   } else {
     // get one_or_all flag
-    bool one_flag;
+    bool one_flag = false;
     ObDatum *json_datum = NULL;
     ObExpr *json_arg = expr.args_[1];
     ObObjType val_type = json_arg->datum_meta_.type_;
@@ -175,7 +175,7 @@ int ObExprJsonContainsPath::calc_resultN(common::ObObj &result,
       LOG_WARN("get_json_doc failed", K(ret));
     } else {
       // get one_or_all flag
-      bool one_flag;
+      bool one_flag = false;
       ObObjType val_type = params[1].get_type();
       if (val_type == ObNullType || params[1].is_null()) {
         is_null_result = true;

src/sql/engine/expr/ob_expr_json_value.cpp

@@ -954,7 +954,7 @@ int ObExprJsonValue::cast_to_year(ObIJsonBase *j_base, uint8_t &val)
 int ObExprJsonValue::cast_to_float(ObIJsonBase *j_base, ObObjType dst_type, float &val)
 {
   INIT_SUCC(ret);
-  double tmp_val;
+  double tmp_val = 0;
 
   if (OB_ISNULL(j_base)) {
     ret = OB_ERR_NULL_VALUE;

src/storage/blocksstable/ob_macro_block_writer.cpp

@@ -659,7 +659,7 @@ int ObMacroBlockWriter::save_root_micro_block()
     }
     if (OB_SUCC(ret)) {
       ObStoreRow row;
-      IndexMicroBlockDesc* task_top_block_descs;
+      IndexMicroBlockDesc* task_top_block_descs = NULL;
       if (OB_FAIL(micro_reader.init(block_data, &index_column_map_))) {
         STORAGE_LOG(WARN, "failed to init micro block reader", K(ret));
       } else if (OB_FAIL(sstable_index_writer_->get_index_block_desc(task_top_block_descs))) {