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PHP db2_special_columns

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db2_special_columns

(PECL ibm_db2 >= 1.0.0)

db2_special_columns — Returns a result set listing the unique row identifier columns for a table

Description

resource db2_special_columns ( resource $connection , string $qualifier , string $schema , string $table_name , int $scope )

Returns a result set listing the unique row identifier columns for a table.

Parameters

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.

table_name

The name of the table.

scope

Integer value representing the minimum duration for which the unique row identifier is valid. This can be one of the following values:

Integer value SQL constant Description
0 SQL_SCOPE_CURROW Row identifier is valid only while the cursor is positioned on the row.
1 SQL_SCOPE_TRANSACTION Row identifier is valid for the duration of the transaction.
2 SQL_SCOPE_SESSION Row identifier is valid for the duration of the connection.

Return Values

Returns a statement resource with a result set containing rows with unique row identifier information for a table. The rows are composed of the following columns:

Column name Description
SCOPE

Integer value SQL constant Description
0 SQL_SCOPE_CURROW Row identifier is valid only while the cursor is positioned on the row.
1 SQL_SCOPE_TRANSACTION Row identifier is valid for the duration of the transaction.
2 SQL_SCOPE_SESSION Row identifier is valid for the duration of the connection.

COLUMN_NAME Name of the unique column.
DATA_TYPE SQL data type for the column.
TYPE_NAME Character string representation of the SQL 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).
PSEUDO_COLUMN Always returns 1.

See Also

  • 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_procedure_columns() - Returns a result set listing stored procedure parameters
  • db2_procedures() - Returns a result set listing the stored procedures registered in a database
  • 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