#include <NdbSqlUtil.hpp>

Classes
struct	Type

Public Types
typedef int	Cmp (const void info, const void p1, uint n1, const void *p2, uint n2)
typedef int	Like (const void info, const void p1, unsigned n1, const void *p2, unsigned n2)
typedef int	AndMask (const void data, unsigned dataLen, const void mask, unsigned maskLen, bool cmpZero)

Static Public Member Functions
static const Type &	getType (Uint32 typeId)
static uint	check_column_for_pk (Uint32 typeId, const void *info)
static uint	check_column_for_hash_index (Uint32 typeId, const void *info)
static uint	check_column_for_ordered_index (Uint32 typeId, const void *info)
static bool	get_var_length (Uint32 typeId, const void *p, unsigned attrlen, Uint32 &lb, Uint32 &len)
static int	strnxfrm_bug7284 (CHARSET_INFO cs, unsigned char dst, unsigned dstLen, const unsigned char *src, unsigned srcLen)
static size_t	ndb_strnxfrm (struct charset_info_st cs, uchar dst, size_t dstlen, const uchar *src, size_t srclen)
static void	convertByteOrder (Uint32 typeId, Uint32 typeLog2Size, Uint32 arrayType, Uint32 arraySize, uchar *data, Uint32 dataByteSize)

Friends
class	NdbPack

Detailed Description

Helper class with comparison functions on NDB (column) data types.

Notes: this Helper class

is used by kernel code
provides non-elementary functions
is not generic, template-based code
has link/library dependencies upon MySQL code (in contrast to other type utility classes, like ./NdbTypesUtil).

Definition at line 37 of file NdbSqlUtil.hpp.

Member Typedef Documentation

typedef int NdbSqlUtil::AndMask(const void *data, unsigned dataLen, const void *mask, unsigned maskLen, bool cmpZero)

Prototype for mask comparisons. Defined for bit type.

If common portion of data AND Mask is equal to mask return 0, else return 1. If cmpZero, compare data AND Mask to zero.

Definition at line 69 of file NdbSqlUtil.hpp.

typedef int NdbSqlUtil::Cmp(const void *info, const void *p1, uint n1, const void *p2, uint n2)

Compare attribute values. Returns negative, zero, positive for less, equal, greater. We trust DBTUP to validate all data and mysql upgrade to not invalidate them. Bad values (such as NaN) causing undefined results crash here always (require, not assert) since they are likely to cause a more obscure crash in DBTUX. wl4163_todo: API probably should not crash.

Parameters are pointers to values (no alignment requirements) and their lengths in bytes. First parameter is a pointer to type specific extra info. Char types receive CHARSET_INFO in it.

Definition at line 51 of file NdbSqlUtil.hpp.

typedef int NdbSqlUtil::Like(const void *info, const void *p1, unsigned n1, const void *p2, unsigned n2)

Prototype for "like" comparison. Defined for string types. First argument can be fixed or var* type, second argument is fixed. Returns 0 on match, +1 on no match, and -1 on bad data.

Uses default special chars ( \ % _ ).

Definition at line 60 of file NdbSqlUtil.hpp.

Member Function Documentation

uint NdbSqlUtil::check_column_for_pk	(	Uint32	typeId,
		const void *	info
	)

static

Check character set.

Definition at line 844 of file NdbSqlUtil.cpp.

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void NdbSqlUtil::convertByteOrder	(	Uint32	typeId,
		Uint32	typeLog2Size,
		Uint32	arrayType,
		Uint32	arraySize,
		uchar *	data,
		Uint32	dataByteSize
	)

static

Convert attribute data to/from network byte order This method converts the passed data of the passed type between host and network byte order. On little-endian (network order) hosts, it has no effect.

Convert attribute byte order if necessary

Definition at line 1152 of file NdbSqlUtil.cpp.

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bool NdbSqlUtil::get_var_length	(	Uint32	typeId,
		const void *	p,
		unsigned	attrlen,
		Uint32 &	lb,
		Uint32 &	len
	)

static

Get number of length bytes and length from variable length string. Returns false on error (invalid data). For other types returns zero length bytes and the fixed attribute length.

Definition at line 917 of file NdbSqlUtil.cpp.

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