AI Feature Functions

gs_index_advise(text)
Description: Recommends an index for a single query statement.

Parameter: SQL statement string

Return type: record
hypopg_create_index(text)
Description: Creates a virtual index.

Parameter: character string of the statement for creating an index

Return type: record
hypopg_display_index()
Description: Displays information about all created virtual indexes.

Parameter: none

Return type: record
hypopg_drop_index(oid)
Description: Deletes a specified virtual index.

Parameter: OID of the index

Return type: Boolean
hypopg_reset_index()
Description: Clears all virtual indexes.

Parameter: none

Return type: none
hypopg_estimate_size(oid)
Description: Estimates the space required for creating a specified index.

Parameter: OID of the index

Return type: int8
check_engine_status(ip text, port text)
Description: Tests whether a predictor engine provides services on a specified IP address and port.

Parameter: IP address and port number of the predictor engine.

Return type: text

This function is unavailable in the current version.
encode_plan_node(optname text, orientation text, strategy text, options text, dop int8, quals text, projection text)
Description: Encodes the plan operator information in the input parameters.

Parameter: plan operator information

Return type: text

This function is an internal function. You are advised not to use it directly.
model_train_opt(template text, model text)
Description: Trains a given query performance prediction model.

Parameters: template name and model name of the performance prediction model

Return type: startup_time_accuracy FLOAT8, total_time_accuracy FLOAT8, rows_accuracy FLOAT8, peak_memory_accuracy FLOAT8

This function is unavailable in the current version.
track_model_train_opt(ip text, port text)
Description: Returns the training log address of the specified IP address and port predictor engine.

Parameter: IP address and port number of the predictor engine

Return type: text

This function is unavailable in the current version.
encode_feature_perf_hist(datname text)
Description: Encodes historical plan operators collected in the target database.

Parameter: database name

Return type: queryid bigint, plan_node_id int, parent_node_id int, left_child_id int, right_child_id int, encode text, startup_time bigint, total_time bigint, rows bigint, and peak_memory int
gather_encoding_info(datname text)
Description: Calls encode_feature_perf_hist to save the encoded data persistently.

Parameter: database name

Return type: int