(PECL ibm_db2 >= 1.0.0)
db2_statistics — Returns a result set listing the index and statistics for a table
$connection,$qualifier,$schema,$table_name,$uniqueReturns a result set listing the index and statistics for a table.
connectionA 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 that contains the targeted table. If this parameter is
null, the statistics and indexes are returned for the schema of the
current user.
table_nameThe name of the table.
unique
When unique is true, the information for all
indexes in the table are returned.
Otherwise, only the information for unique indexes in the table are
returned.
Returns a statement resource with a result set containing rows describing the statistics and indexes for the base tables matching the specified parameters. The rows are composed of the following columns:
| Column name | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| TABLE_CAT | The catalog that contains the table. The value is null if
this table does not have catalogs. |
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| TABLE_SCHEM | Name of the schema that contains the table. | ||||||||||
| TABLE_NAME | Name of the table. | ||||||||||
| NON_UNIQUE |
An integer value representing whether the index prohibits unique values, or whether the row represents statistics on the table itself:
|
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| INDEX_QUALIFIER | A string value representing the qualifier that would have to be prepended to INDEX_NAME to fully qualify the index. | ||||||||||
| INDEX_NAME | A string representing the name of the index. | ||||||||||
| TYPE |
An integer value representing the type of information contained in this row of the result set:
|
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| ORDINAL_POSITION | The 1-indexed position of the column in the index. null if
the row contains statistics information about the table itself. |
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| COLUMN_NAME | The name of the column in the index. null if the row
contains statistics information about the table itself. |
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| ASC_OR_DESC |
A if the column is sorted in ascending order,
D if the column is sorted in descending order,
null if the row contains statistics information about the table
itself.
|
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| CARDINALITY |
If the row contains information about an index, this column contains an integer value representing the number of unique values in the index. If the row contains information about the table itself, this column contains an integer value representing the number of rows in the table. |
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| PAGES |
If the row contains information about an index, this column contains an integer value representing the number of pages used to store the index. If the row contains information about the table itself, this column contains an integer value representing the number of pages used to store the table. |
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| FILTER_CONDITION | Always returns null. |