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Item_date_add_interval Class Reference
Inheritance diagram for Item_date_add_interval:
Item_temporal_hybrid_func Item_str_func Item_func Item_result_field Item

List of all members.

Public Member Functions

 Item_date_add_interval (Item *a, Item *b, interval_type type_arg, bool neg_arg)
const char * func_name () const
void fix_length_and_dec ()
bool eq (const Item *item, bool binary_cmp) const
void print (String *str, enum_query_type query_type)

Public Attributes

const interval_type int_type
const bool date_sub_interval

Protected Member Functions

bool val_datetime (MYSQL_TIME *ltime, uint fuzzy_date)

Member Function Documentation

bool Item_date_add_interval::eq ( const Item item,
bool  binary_cmp 
) const [virtual]

This function is called when:

  • Comparing items in the WHERE clause (when doing where optimization)
  • When trying to find an ORDER BY/GROUP BY item in the SELECT part
  • When matching fields in multiple equality objects (Item_equal)

Reimplemented from Item_func.

void Item_date_add_interval::print ( String str,
enum_query_type  query_type 
) [virtual]

This method is used for to:

  • to generate a view definition query (SELECT-statement);
  • to generate a SQL-query for EXPLAIN EXTENDED;
  • to generate a SQL-query to be shown in INFORMATION_SCHEMA;
  • debug.

For more information about view definition query, INFORMATION_SCHEMA query and why they should be generated from the Item-tree,

See also:

Reimplemented from Item_func.

bool Item_date_add_interval::val_datetime ( MYSQL_TIME *  ltime,
uint  fuzzy_date 
) [protected, virtual]

Get "native" temporal value as MYSQL_TIME

OUTltime The value is stored here.
INfuzzy_date Date flags.
Return values:
falseOn success.
trueOn error.

Implements Item_temporal_hybrid_func.

The documentation for this class was generated from the following files:
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