odbc_columns
(PHP 4, PHP 5, PHP 7, PHP 8)
odbc_columns — Lists the column names in specified tables
说明
odbc_columns
( resource
$odbc
, string|null $catalog = null
, string|null $schema = null
, string|null $table = null
, string|null $column = null
) : resource|falseLists all columns in the requested range.
参数
-
odbc -
ODBC 连接标识符，详见 odbc_connect()。
-
catalog -
The catalog ('qualifier' in ODBC 2 parlance).
-
schema -
The schema ('owner' in ODBC 2 parlance). 此参数接受下列查询模式：
%来匹配零到多个字符，_来匹配单个字符。 -
table -
The table name. 此参数接受下列查询模式：
%来匹配零到多个字符，_来匹配单个字符。 -
column -
The column name. 此参数接受下列查询模式：
%来匹配零到多个字符，_来匹配单个字符。
返回值
Returns an ODBC result identifier 或者在失败时返回 false.
The result set has the following columns:
TABLE_CATTABLE_SCHEMTABLE_NAMECOLUMN_NAMEDATA_TYPETYPE_NAMECOLUMN_SIZEBUFFER_LENGTHDECIMAL_DIGITSNUM_PREC_RADIXNULLABLEREMARKSCOLUMN_DEFSQL_DATA_TYPESQL_DATETIME_SUBCHAR_OCTET_LENGTHORDINAL_POSITIONIS_NULLABLE
The result set is ordered by TABLE_CAT, TABLE_SCHEM,
TABLE_NAME and ORDINAL_POSITION.
更新日志
| 版本 | 说明 |
|---|---|
| 8.0.0 |
schema, table and column
are now nullable.
|
范例
示例 #1 List Columns of a Table
<?php
$conn = odbc_connect($dsn, $user, $pass);
$columns = odbc_columns($conn, 'TutorialDB', 'dbo', 'test', '%');
while (($row = odbc_fetch_array($columns))) {
print_r($row);
break; // further rows omitted for brevity
}
?>
以上例程的输出类似于：
Array
(
[TABLE_CAT] => TutorialDB
[TABLE_SCHEM] => dbo
[TABLE_NAME] => TEST
[COLUMN_NAME] => id
[DATA_TYPE] => 4
[TYPE_NAME] => int
[COLUMN_SIZE] => 10
[BUFFER_LENGTH] => 4
[DECIMAL_DIGITS] => 0
[NUM_PREC_RADIX] => 10
[NULLABLE] => 0
[REMARKS] =>
[COLUMN_DEF] =>
[SQL_DATA_TYPE] => 4
[SQL_DATETIME_SUB] =>
[CHAR_OCTET_LENGTH] =>
[ORDINAL_POSITION] => 1
[IS_NULLABLE] => NO
)
参见
- odbc_columnprivileges() - Lists columns and associated privileges for the given table
- odbc_procedurecolumns() - Retrieve information about parameters to procedures