db2_columns

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Beschreibung

resource db2_columns ( resource connection [, string qualifier [, string schema [, string table-name [, string column-name]]]] )

Returns a result set listing the columns and associated metadata for a table.

Parameter Liste

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 tables. To match all schemas, pass '%'.
table-name: The name of the table or view. To match all tables in the database, pass NULL or an empty string.
column-name: The name of the column. To match all columns in the table, pass NULL or an empty string.

Rückgabewerte

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

Column name	Description
TABLE_CAT	Name of the catalog. The value is NULL if this table does not have catalogs.
TABLE_SCHEM	Name of the schema.
TABLE_NAME	Name of the table or view.
COLUMN_NAME	Name of the column.
DATA_TYPE	The SQL data type for the column represented as an integer value.
TYPE_NAME	A string representing the data type for the column.
COLUMN_SIZE	An integer value representing the size of the column.
BUFFER_LENGTH	Maximum number of bytes necessary to store data from this column.
DECIMAL_DIGITS	The scale of the column, 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 column is nullable or not.
REMARKS	Description of the column.
COLUMN_DEF	Default value for the column.
SQL_DATA_TYPE	An integer value representing the size of the column.
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 column, 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 column in the table.
IS_NULLABLE	A string value where 'YES' means that the column is nullable and 'NO' means that the column is not nullable.

Siehe auch

db2_column_privileges()

db2_foreign_keys()

db2_primary_keys()

db2_procedure_columns()

db2_procedures()

db2_special_columns()

db2_statistics()

db2_table_privileges()

db2_tables()

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