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Helper function for debugging.

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This commit is contained in:
Oleksandr Byelkin 2016-09-11 11:55:57 +02:00
parent 1168e2fa54
commit 9810d5ea13
1 changed files with 45 additions and 1 deletions
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46
sql/item.cc
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@ -10126,7 +10126,7 @@ table_map Item_ref_null_helper::used_tables() const
#ifndef DBUG_OFF
/* Debugger help function */
static char dbug_item_print_buf[256];
static char dbug_item_print_buf[2048];
const char *dbug_print_item(Item *item)
{
@ -10150,6 +10150,50 @@ const char *dbug_print_item(Item *item)
return "Couldn't fit into buffer";
}
const char *dbug_print_select(SELECT_LEX *sl)
{
char *buf= dbug_item_print_buf;
String str(buf, sizeof(dbug_item_print_buf), &my_charset_bin);
str.length(0);
if (!sl)
return "(SELECT_LEX*)NULL";
THD *thd= current_thd;
ulonglong save_option_bits= thd->variables.option_bits;
thd->variables.option_bits &= ~OPTION_QUOTE_SHOW_CREATE;
sl->print(thd, &str, QT_EXPLAIN);
thd->variables.option_bits= save_option_bits;
if (str.c_ptr() == buf)
return buf;
else
return "Couldn't fit into buffer";
}
const char *dbug_print_unit(SELECT_LEX_UNIT *un)
{
char *buf= dbug_item_print_buf;
String str(buf, sizeof(dbug_item_print_buf), &my_charset_bin);
str.length(0);
if (!un)
return "(SELECT_LEX_UNIT*)NULL";
THD *thd= current_thd;
ulonglong save_option_bits= thd->variables.option_bits;
thd->variables.option_bits &= ~OPTION_QUOTE_SHOW_CREATE;
un->print(&str, QT_EXPLAIN);
thd->variables.option_bits= save_option_bits;
if (str.c_ptr() == buf)
return buf;
else
return "Couldn't fit into buffer";
}
#endif /*DBUG_OFF*/