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C to SQL: Numeric

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The identifiers for the numeric ODBC C data types are:

SQL_C_STINYINT

SQL_C_SLONG

SQL_C_UTINYINT

SQL_C_ULONG

SQL_C_TINYINT

SQL_C_LONG

SQL_C_SSHORT

SQL_C_FLOAT

SQL_C_USHORT

SQL_C_DOUBLE

SQL_C_SHORT

SQL_C_NUMERIC

SQL_C_SBIGINT

SQL_C_UBIGINT

The following table shows the ODBC SQL data types to which numeric C data may be converted. For an explanation of the columns and terms in the table, see Converting Data from C to SQL Data Types.

SQL type identifier Test SQLSTATE
SQL_CHAR

SQL_VARCHAR

SQL_LONGVARCHAR		 Number of digits <= Column byte length

Number of digits > Column byte length		 n/a

22001
SQL_WCHAR

SQL_WVARCHAR

SQL_WLONGVARCHAR		 Number of characters <= Column character length

Number of characters > Column character length		 n/a

22001
SQL_DECIMAL[b]

SQL_NUMERIC[b]

SQL_TINYINT[b]

SQL_SMALLINT[b]

SQL_INTEGER[b]

SQL_BIGINT[b]		 Data converted without truncation or with truncated of fractional digits

Data converted with truncation of whole digits		 n/a

22003
SQL_REAL

SQL_FLOAT

SQL_DOUBLE		 Data is within the range of the data type to which the number is being converted

Data is outside the range of the data type to which the number is being converted		 n/a

22003
SQL_BIT Data is 0 or 1

Data is greater than 0, less than 2, and not equal to 1

Data is less than 0 or greater than or equal to 2		 n/a

22001

22003
SQL_INTERVAL_YEAR[a]

SQL_INTERVAL_MONTH[a]

SQL_INTERVAL_DAY[a]

SQL_INTERVAL_HOUR[a]

SQL_INTERVAL_MINUTE[a]

SQL_INTERVAL_SECOND[a]		 Data not truncated.

Data truncated.		 n/a

22015

[a] These conversions are supported only for the exact numeric data types (SQL_C_STINYINT, SQL_C_UTINYINT, SQL_C_SSHORT, SQL_C_USHORT, SQL_C_SLONG, SQL_C_ULONG, or SQL_C_NUMERIC). They are not supported for the approximate numeric data types (SQL_C_FLOAT or SQL_C_DOUBLE). Exact numeric C data types cannot be converted to an interval SQL type whose interval precision is not a single field.

[b] For the "n/a" case, a driver may optionally return SQL_SUCCESS_WITH_INFO and 01S07 when there is a fractional truncation.

The driver ignores the length/indicator value when converting data from the numeric C data types and assumes that the size of the data buffer is the size of the numeric C data type. The length/indicator value is passed in the StrLen_or_Ind argument in SQLPutData and in the buffer specified with the StrLen_or_IndPtr argument in SQLBindParameter. The data buffer is specified with the DataPtr argument in SQLPutData and the ParameterValuePtr argument in SQLBindParameter.