示例 SQLGetTypeInfo 结果集

应用程序调用 SQLGetTypeInfo 来确定数据源支持哪些数据类型以及这些数据类型的特征。 下表显示了 SQLGetTypeInfo 为支持SQL_CHAR、SQL_LONGVARCHAR、SQL_DECIMAL、SQL_REAL、SQL_DATETIME、SQL_INTERVAL_YEAR和SQL_INTERVAL_DAY_TO_SECOND的数据源返回的示例结果集。

TYPE_NAME	DATA_TYPE	COLUMN_SIZE	LITERAL_PREFIX	LITERAL_SUFFIX	CREATE_PARAMS	NULLABLE
“char”	SQL_CHAR	255	"'"	"'"	“length”	SQL_TRUE
"text"	SQL_LONGVARCHAR	2147483647	"'"	"'"	<Null>	SQL_TRUE
“decimal”	SQL_DECIMAL	28	<Null>	<Null>	“precision， scale”	SQL_TRUE
“real”	SQL_REAL	7	<Null>	<Null>	<Null>	SQL_TRUE
“datetime”	SQL_TYPE_TIMESTAMP	23	"'"	"'"	<Null>	SQL_TRUE
“INTERVAL YEAR () TO YEAR”	SQL_INTERVAL_YEAR	9	"'"	"'"	“precision”	SQL_TRUE
“INTERVAL DAY () TO FRACTION (5) ”	SQL_INTERVAL_DAY_TO_SECOND	24	"'"	"'"	“precision”	SQL_TRUE

DATA_TYPE	CASE_SENSITIVE	SEARCHABLE	UNSIGNED_ATTRIBUTE	FIXED_PREC_SCALE	AUTO_UNIQUE_VALUE	LOCAL_TYPE_NAME
SQL_CHAR	SQL_FALSE	SQL_SEARCHABLE	<Null>	SQL_FALSE	<Null>	“char”
SQL_LONGVARCHAR	SQL_FALSE	SQL_PRED_CHAR	<Null>	SQL_FALSE	<Null>	"text"
SQL_DECIMAL	SQL_FALSE	SQL_PRED_BASIC	SQL_FALSE	SQL_FALSE	SQL_FALSE	“decimal”
SQL_REAL	SQL_FALSE	SQL_PRED_BASIC	SQL_FALSE	SQL_FALSE	SQL_FALSE	“real”
SQL_TYPE_TIMESTAMP	SQL_FALSE	SQL_SEARCHABLE	<Null>	SQL_FALSE	<Null>	“datetime”
SQL_INTERVAL_YEAR	SQL_FALSE	SQL_SEARCHABLE	<Null>	SQL_FALSE	<Null>	“INTERVAL YEAR () TO YEAR”
SQL_INTERVAL_DAY_TO_SECOND	SQL_FALSE	SQL_PRED_BASIC	<Null>	SQL_FALSE	<Null>	“INTERVAL DAY () TO FRACTION (5) ”

DATA_TYPE	MINIMUM_SCALE	MAXIMUM_SCALE	SQL_DATA_TYPE	SQL_DATETIME_SUB	NUM_PREC_RADIX	INTERVAL_PRECISION
SQL_CHAR	<Null>	<Null>	SQL_CHAR	<Null>	<Null>	<Null>
SQL_LONGVARCHAR	<Null>	<Null>	SQL_LONGVARCHAR	<Null>	<Null>	<Null>
SQL_DECIMAL	0	28	SQL_DECIMAL	<Null>	10	<Null>
SQL_REAL	<Null>	<Null>	SQL_REAL	<Null>	10	<Null>
SQL_TYPE_TIMESTAMP	3	3	SQL_DATETIME	SQL_CODE_TIMESTAMP	<Null>	12
SQL_INTERVAL_YEAR	0	0	SQL_INTERVAL	SQL_CODE_INTERVALYEAR	<Null>	9
SQL_INTERVAL_DAY_TO_SECOND	5	5	SQL_INTERVAL	SQL_CODE_INTERVALDAY_TO_SECOND	<Null>	9