Categories:

Table, View, & Sequence DDL

DESCRIBE SEARCH OPTIMIZATION

Describes the search optimization configuration for a specified table and its columns.

DESCRIBE can be abbreviated to DESC.

See also:

Using the Search Optimization Service

Syntax

DESC[RIBE] SEARCH OPTIMIZATION ON <table_name>;

Parameters

name

Specifies the identifier for the table to describe. If the identifier contains spaces or special characters, the entire string must be enclosed in double quotes. Identifiers enclosed in double quotes are also case-sensitive.

Output

The command prints a table containing information on each search method and target in the search optimization configuration. The table contains the following columns:

Column Name

Description

expression_id

Unique identifier for a search method and target.

method

Search method for optimizing queries for a particular type of predicate:

  • EQUALITY (for equality and IN predicates).

  • SUBSTRING (for predicates that match substrings – e.g. LIKE, ILIKE, etc.).

  • GEO (for predicates that use GEOGRAPHY types).

target

Column or VARIANT field that the method applies to.

target_data_type

Data type of the column or VARIANT field.

active

Specifies whether or not the expression has finished the initial build of the search access paths for the expression.

Usage Notes

  • To post-process the output of this command, you can use the RESULT_SCAN function, which treats the output as a table that can be queried.

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