MYSQL_RES_FIELD_T

Last published : Oct 30, 2026
Returns mysql response field object. It allows to access properties of
individual attributes of the query response.
This topic lists the expressions that are provided by this class.
CATALOG
returns the Catalog name of the column.
Returns: text_t
CHAR_SET
returns charset of the column.
Returns: mysql_charset_e
DATATYPE
returns datatype of the column.
possible values in Hex
0x00 DECIMAL
0x01 TINY
0x02 SHORT
0x03 LONG
0x04 FLOAT
0x05 DOUBLE
0x06 NULL
0x07 TIMESTAMP
0x08 LONGLONG
0x09 INT24
0x0a DATE
0x0b TIME
0x0c DATETIME
0x0d YEAR
0x0e NEWDATE
0x0f VARCHAR (new in MySQL 5.0)
0x10 BIT (new in MySQL 5.0)
0xf6 NEWDECIMAL (new in MYSQL 5.0)
0xf7 ENUM
0xf8 SET
0xf9 TINY_BLOB
0xfa MEDIUM_BLOB
0xfb LONG_BLOB
0xfc BLOB
0xfd VAR_STRING
0xfe STRING
0xff GEOMETRY
Returns: mysql_res_field_datatype_e
DB
returns the database name of the column.
Returns: text_t
DECIMALS
The number of positions after the decimal point if the type is
DECIMAL or NUMERIC.
Returns: num_at
FLAGS
returns flag values of the column.
The possible flag values (in hexadec)
0001 NOT_NULL_FLAG
0002 PRI_KEY_FLAG
0004 UNIQUE_KEY_FLAG
0008 MULTIPLE_KEY_FLAG
0010 BLOB_FLAG
0020 UNSIGNED_FLAG
0040 ZEROFILL_FLAG
0080 BINARY_FLAG
0100 ENUM_FLAG
0200 AUTO_INCREMENT_FLAG
0400 TIMESTAMP_FLAG
0800 SET_FLAG
Returns: num_at
LENGTH
returns length of the column. The value given here may be
larger than the actual length, for example an instance of a
VARCHAR(2) column may have only 1 character in it.
Returns: num_at
NAME
returns alias name of the column (table attribute).
Returns: text_t
ORIGINAL_NAME
returns alias name of the column (table attribute).
Returns: text_t
ORIGINAL_TABLE
returns table name of the column.
Returns: text_t
TABLE
returns alias table name of the column.
Returns: text_t