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Bug#52199 utf32: mbminlen=4, mbmaxlen=4, type->mbminlen=0, type->mbmaxlen=4

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Merge and adjust a forgotten change to fix this bug.
rb://393 approved by Jimmy Yang
  ------------------------------------------------------------------------
  r3794 | marko | 2009-01-07 14:14:53 +0000 (Wed, 07 Jan 2009) | 18 lines

  branches/6.0: Allow the minimum length of a multi-byte character to be
  up to 4 bytes. (Bug #35391)

  dtype_t, dict_col_t: Replace mbminlen:2, mbmaxlen:3 with mbminmaxlen:5.
  In this way, the 5 bits can hold two values of 0..4, and the storage size
  of the fields will not cross the 64-bit boundary.  Encode the values as
  DATA_MBMAX * mbmaxlen + mbminlen.  Define the auxiliary macros
  DB_MBMINLEN(mbminmaxlen), DB_MBMAXLEN(mbminmaxlen), and
  DB_MINMAXLEN(mbminlen, mbmaxlen).

  Try to trim and pad UTF-16 and UTF-32 with spaces as appropriate.

  Alexander Barkov suggested the use of cs->cset->fill(cs, buff, len, 0x20).
  ha_innobase::store_key_val_for_row() now does that, but the added function
  row_mysql_pad_col() does not, because it doesn't have the MySQL TABLE object.

  rb://49 approved by Heikki Tuuri
  ------------------------------------------------------------------------
This commit is contained in:
Marko Mäkelä
2010-06-29 14:32:48 +03:00
parent 8847387ecd
commit 142e8417dc
20 changed files with 364 additions and 185 deletions
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11
storage/innobase/include/row0mysql.h
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@@ -103,6 +103,17 @@ row_mysql_read_blob_ref(
ulint col_len); /*!< in: BLOB reference length
(not BLOB length) */
/**************************************************************//**
Pad a column with spaces. */
UNIV_INTERN
void
row_mysql_pad_col(
/*==============*/
ulint mbminlen, /*!< in: minimum size of a character,
in bytes */
byte* pad, /*!< out: padded buffer */
ulint len); /*!< in: number of bytes to pad */
/**************************************************************//**
Stores a non-SQL-NULL field given in the MySQL format in the InnoDB format.
The counterpart of this function is row_sel_field_store_in_mysql_format() in
row0sel.c.