Qualifiers tell the access service how to format data that is inserted for a placeholder.
If you do not supply a qualifier, the access service applies default transformations.
Qualification is required for date and time values. You can use the ?T, ?t, ?D, and ?d qualifiers for dates, or you can create a custom qualifier using special qualifiers.
Placeholder/ Qualifier |
Definition |
---|---|
?C |
Character string enclosed in quotes |
?N |
Numeric data, no quotes |
?D |
Standard format Adaptive Server datetime data enclosed in quotes |
?T |
Standard format ISO TIMESTAMP data enclosed in quotes, ‘YYYY-MM-DD-hh.mm.ss.nnnnnn’ |
?d |
‘mm/dd/yyyy’ |
?t |
‘hh:mm:ss’ |
?X |
Standard format Adaptive Server hexadecimal data (for example, 0xffee) used for transferring binary data |
?x |
Standard format hexadecimal data (for example, X’FFEE’) used for transferring binary data |
?y |
‘yy/mm/dd’ |
?G |
G‘<...>’ used for transferring graphic datatypes or formatting a graphic constant from binary character data |
?g |
GX‘<...>’ used for transferring graphic datatypes or formatting a graphic constant from binary character data (returns data in hexadecimal format) |
See the effects of the ?C, ?N, ?D, and ?T qualifiers.
Open Server Datatype |
Default |
Effects (by Qualifier) |
|||
---|---|---|---|---|---|
?C |
?N |
?D |
?T |
||
CS_CHAR CS_VARCHAR CS_TEXT |
?C |
Quote |
No quote |
Convert to Open Server datetime string, quote |
Convert to ISO TIMESTAMP, quote |
CS_BIT, CS_INT1 CS_INT2 CS_ INT4 CS_REAL CS_FLOAT |
?N |
Convert to char, quote |
Convert to char, no quote |
n/a |
n/a |
CS_MONEY CS_MONEY4 CS_DECIMAL |
?N |
Convert to char, quote |
Convert to char, no quote |
n/a |
n/a |
CS_DATETIME CS_DATETIME4 |
?D |
'MON DD YYYY hh:mm’ [AM or PM] |
n/a |
'MON DD YYYY hh:mm:ss:nnn’ |
'YYYY-MM-DD-hh.mm.ss. nnnnnn’ |
For CS_CHAR, CS_VARCHAR, and CS_TEXT used with the ?T qualifier, if the source is an ISO DATE or TIME, the DefaultDate and DefaultTime property values are used to fill in missing information.
See the effects of the ?y, ?d, ?t, and ?x qualifiers.
Open Server Datatype |
Default |
Effects (by Qualifier) |
|||
---|---|---|---|---|---|
?y |
?d |
?t |
?x |
||
CS_CHAR CS_VARCHAR CS_TEXT |
?C |
Convert and quote |
Convert and quote |
Convert and quote |
Convert to hex; leading X’ trailing ’. For example, X’ab70’ |
CS_BIT, CS_INT1 CS_INT2 CS_INT4 CS_REAL CS_FLOAT CS_MONEY CS_MONEY4 CS_DECIMAL |
?N |
n/a |
n/a |
n/a |
n/a |
CS_DATETIME CS_DATETIME4 |
?D |
'yy/mm/dd’ |
‘mm/dd/yyyy’ |
‘hh:mm:ss’ |
n/a |
CS_BINARY CS_VARBINARY CS_IMAGE |
?X or ?x |
n/a |
n/a |
n/a |
Convert to hex; leading X’ trailing ’. For example, X’ab70’ |
For CS_CHAR, CS_VARCHAR, and CS_TEXT used with the ?yqualifier, if the source is an ISO DATE, TIME, or TIMESTAMP, it is converted to ‘yy/mm/dd’.
For CS_CHAR, CS_VARCHAR, and CS_TEXT used with the ?d qualifier, if the source is an ISO DATE, TIME, or TIMESTAMP, it is converted to ‘mm/dd/yy’.
For CS_CHAR, CS_VARCHAR, and CS_TEXT used with the ?t qualifier, if the source is an ISO DATE, TIME, or TIMESTAMP, it is converted to ‘hh:mm:ss’.
For all datatypes used with the ?x qualifier, if the target database is ODBC, ?x converts the data to the standard ODBC hexadecimal format (a quoted hexadecimal number with a leading X).
See the effects of the ?x and ?O qualifiers.
Open Server Datatype |
Default |
Effects (by Qualifier) |
---|---|---|
?X |
||
CS_CHAR CS_VARCHAR CS_TEXT |
Convert to hex; leading 0x, no quote |
|
CS_BIT CS_ INT1 CS_INT2 CS_INT4 CS_REAL CS_FLOAT CS_MONEY CS_MONEY4 CS_DECIMAL |
?N |
n/a |
CS_DATETIME CS_DATETIME4 |
?D |
n/a |
CS_BINARY CS_VARBINARY CS_IMAGE |
?X or ?x |
Convert to hex; leading 0x, no quote |