NAME

       odbx_column_type - Returns the SQL data type of a column in the current result set

SYNOPSIS

       #include <opendbx/api.h>

       int odbx_column_type (odbx_result_t* result, unsigned long pos);

DESCRIPTION

       odbx_column_type() returns the data type of the requested column within the current result
       set returned by odbx_result(). The column type applies to all fields at the same  position
       of  the  rows  fetched  via  odbx_row_fetch().  The  definitions  are based on the SQL2003
       standard and the data types of the database server have to comply to the specification  of
       the standard. Data types provided by database implementations which are not covered by the
       SQL2003 standard are subsumed as ODBX_TYPE_UNKNOWN.

       The result parameter required by this function must be a  valid  result  set  returned  by
       odbx_result() and must not has been feed to odbx_result_finish() before.

       Valid  column  indices  for  the requested column provided via pos start with zero and end
       with the value returned by odbx_column_count() minus one.

RETURN VALUE

       If a values less than zero is returned, an error occurred. Possible error codes are listed
       in  the  error  section and the application can retrieve a textual message of the error by
       calling odbx_error().

       A positive return value including zero indicates one of the SQL2003 compliant  data  types
       listed  below.  Before  release 1.1.5 of the OpenDBX library, types were defined as ODBX_*
       instead of ODBX_TYPE_*. The old  definitions  are  kept  for  backward  compatibility  but
       shouldn't be used any more. They will be removed at some point in the future.

       Exact numeric values:

       • ODBX_TYPE_BOOLEAN: True/false values

       • ODBX_TYPE_SMALLINT: Signed 16 bit integer

       • ODBX_TYPE_INTEGER: Signed 32 bit integer

       • ODBX_TYPE_BIGINT: Signed 64 bit integer

       • ODBX_TYPE_DECIMAL: Exact signed numeric values with user defined precision

       Approximate numeric values:

       • ODBX_TYPE_REAL: Approximate numeric values (signed) with 32 bit precision

       • ODBX_TYPE_DOUBLE: Approximate numeric values (signed) with 64 bit precision

       • ODBX_TYPE_FLOAT: Approximate numeric values (signed) with user defined precision

       String values:

       • ODBX_TYPE_CHAR: Fixed number of characters

       • ODBX_TYPE_NCHAR: Fixed number of characters using a national character set

       • ODBX_TYPE_VARCHAR: Variable number of characters

       • ODBX_TYPE_NVARCHAR: Variable number of characters using a national character set

       Large objects:

       • ODBX_TYPE_CLOB: Large text object

       • ODBX_TYPE_NCLOB: Large text object using a national character set

       • ODBX_TYPE_XML: XML tree in text format

       • ODBX_TYPE_BLOB: Large binary object

       Date and time values:

       • ODBX_TYPE_TIME: Time including hours, minutes and seconds

       • ODBX_TYPE_TIME_TZ: Time with timezone information

       • ODBX_TYPE_TIMESTAMP: Date and time

       • ODBX_TYPE_TIMESTAMP_TZ: Date and time with timezone information

       • ODBX_TYPE_DATE: Date including year, month and day

       • ODBX_TYPE_INTERVAL: Date interval

       Arrays and sets:

       • ODBX_TYPE_ARRAY: Array of values

       • ODBX_TYPE_MULTISET: Associative arrays

       External links:

       • ODBX_TYPE_DATALINK: URI locators like URL links

       Vendor specific:

       • ODBX_TYPE_UNKNOWN: Vendor specific data type without representation in SQL2003

ERRORS

       -ODBX_ERR_BACKEND
              The native database library returned an error

       -ODBX_ERR_PARAM
              Either  the result parameter is NULL respectively is invalid or the value of pos is
              out of range

SEE ALSO

       odbx_column_count(), odbx_column_name(), odbx_field_value(), odbx_result()

                                           5 April 2016                       odbx_column_type(3)