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Backporting MDEV-15597 Add class Load_data_outvar and avoid using Item::STRING_ITEM for Item_user_var_as_out_param detection

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This is a part of "MDEV-18045 Backporting the MDEV-15497 changes to 10.2 branch"
This commit is contained in:
Alexander Barkov
2018-03-20 13:02:44 +04:00
parent 8036ad541e
commit 80c3fd184d
10 changed files with 294 additions and 228 deletions
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36
sql/structs.h
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@ -629,4 +629,40 @@ public:
};
class Load_data_param
{
protected:
CHARSET_INFO *m_charset; // Character set of the file
ulonglong m_fixed_length; // Sum of target field lengths for fixed format
bool m_is_fixed_length;
bool m_use_blobs;
public:
Load_data_param(CHARSET_INFO *cs, bool is_fixed_length):
m_charset(cs),
m_fixed_length(0),
m_is_fixed_length(is_fixed_length),
m_use_blobs(false)
{ }
bool add_outvar_field(THD *thd, const Field *field);
bool add_outvar_user_var(THD *thd);
CHARSET_INFO *charset() const { return m_charset; }
bool is_fixed_length() const { return m_is_fixed_length; }
bool use_blobs() const { return m_use_blobs; }
};
class Load_data_outvar
{
public:
virtual ~Load_data_outvar() {}
virtual bool load_data_set_null(THD *thd, const Load_data_param *param)= 0;
virtual bool load_data_set_value(THD *thd, const char *pos, uint length,
const Load_data_param *param)= 0;
virtual bool load_data_set_no_data(THD *thd, const Load_data_param *param)= 0;
virtual void load_data_print_for_log_event(THD *thd, class String *to) const= 0;
virtual bool load_data_add_outvar(THD *thd, Load_data_param *param) const= 0;
virtual uint load_data_fixed_length() const= 0;
};
#endif /* STRUCTS_INCLUDED */