Returns a result set listing stored procedure parameters

# db2_procedure_columns

(PECL ibm_db2 >= 1.0.0)

db2_procedure_columns — Returns a result set listing stored procedure parameters

### 说明

function db2_procedure_columns(
resource `$connection`,
?string `$qualifier`,
string `$schema`,
string `$procedure`,
?string `$parameter`
): resource

Returns a result set listing the parameters for one or more stored procedures.

### 参数

`connection`
  A valid connection to an IBM DB2, Cloudscape, or Apache Derby database.
`qualifier`
  A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass `null` or an empty string.
`schema`
  The schema which contains the procedures. This parameter accepts a search pattern containing `_` and `%` as wildcards.
`procedure`
  The name of the procedure. This parameter accepts a search pattern containing `_` and `%` as wildcards.
`parameter`
  The name of the parameter. This parameter accepts a search pattern containing `_` and `%` as wildcards. If this parameter is `null`, all parameters for the specified stored procedures are returned.

### 返回值

Returns a statement resource with a result set containing rows describing the parameters for the stored procedures matching the specified parameters. The rows are composed of the following columns:

Column name | Description
--- | ---
PROCEDURE_CAT | The catalog that contains the procedure. The value is `null` if this table does not have catalogs.
PROCEDURE_SCHEM | Name of the schema that contains the stored procedure.
PROCEDURE_NAME | Name of the procedure.
COLUMN_NAME | Name of the parameter.
COLUMN_TYPE | An integer value representing the type of the parameter:
Return value | Parameter type
--- | ---
1 (SQL_PARAM_INPUT) | Input (IN) parameter.
2 (SQL_PARAM_INPUT_OUTPUT) | Input/output (INOUT) parameter.
3 (SQL_PARAM_OUTPUT) | Output (OUT) parameter.
DATA_TYPE | The SQL data type for the parameter represented as an integer value.
TYPE_NAME | A string representing the data type for the parameter.
COLUMN_SIZE | An integer value representing the size of the parameter.
BUFFER_LENGTH | Maximum number of bytes necessary to store data for this parameter.
DECIMAL_DIGITS | The scale of the parameter, or `null` where scale is not applicable.
NUM_PREC_RADIX | An integer value of either `10` (representing an exact numeric data type), `2` (representing an approximate numeric data type), or `null` (representing a data type for which radix is not applicable).
NULLABLE | An integer value representing whether the parameter is nullable or not.
REMARKS | Description of the parameter.
COLUMN_DEF | Default value for the parameter.
SQL_DATA_TYPE | An integer value representing the size of the parameter.
SQL_DATETIME_SUB | Returns an integer value representing a datetime subtype code, or `null` for SQL data types to which this does not apply.
CHAR_OCTET_LENGTH | Maximum length in octets for a character data type parameter, which matches COLUMN_SIZE for single-byte character set data, or `null` for non-character data types.
ORDINAL_POSITION | The 1-indexed position of the parameter in the CALL statement.
IS_NULLABLE | A string value where 'YES' means that the parameter accepts or returns `null` values and 'NO' means that the parameter does not accept or return `null` values.

### 参见

- db2_column_privileges() - Returns a result set listing the columns and associated privileges for a table
- db2_columns() - Returns a result set listing the columns and associated metadata for a table
- db2_foreign_keys() - Returns a result set listing the foreign keys for a table
- db2_primary_keys() - Returns a result set listing primary keys for a table
- db2_procedures() - Returns a result set listing the stored procedures registered in a database
- db2_special_columns() - Returns a result set listing the unique row identifier columns for a table
- db2_statistics() - Returns a result set listing the index and statistics for a table
- db2_table_privileges() - Returns a result set listing the tables and associated privileges in a database
- db2_tables() - Returns a result set listing the tables and associated metadata in a database

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