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GUID Escape Sequences

  • Άρθρο

ODBC uses escape sequences for GUID literals. The syntax of this escape sequence is as follows:

{guid 'nnnnnnnn-nnnn-nnnn-nnnn-nnnnnnnnnnnn'}

Remarks

In BNF notation, the syntax is as follows:

ODBC-guid-escape ::=
ODBC-esc-initiator guid 'guid-value' ODBC-esc-terminator

ODBC-esc-initiator ::= {

ODBC-esc-terminator ::= }

guid-value ::= clock-low-value guid-separator clock-middle-value guid-separator clock-high-value guid-separator clock-seq-value guid-separator node-value

guid-separator ::= -

clock-low-value ::= hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit

clock-middle-value ::= hex_digit hex_digit hex_digit hex_digit

clock-high-value ::= hex_digit hex_digit hex_digit hex_digit

clock-seq-value ::= hex_digit hex_digit hex_digit hex_digit

clock-node-value ::= hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit

hex_digit ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F

The GUID literal escape sequence is supported if the GUID data type is supported by the data source. An application should call SQLGetTypeInfo to determine whether this data type is supported.