AI Feature Functions

gs_index_advise(text)

Description: Recommends an index for a single query statement.

Parameter: SQL statement string

Return type: record

For details, see section "DBMind: Autonomous Database O&M > AI Sub-functions of DBMind > Index-advisor: Index Recommendation > Single-Query Index Recommendation" in Feature Guide.

hypopg_create_index(text, [text])

Description: Creates a virtual index.

Parameter: (optional) character string of the statement for creating an index, level of the created virtual index

Return type: record

For details, see section "DBMind: Autonomous Database O&M > AI Sub-functions of DBMind > Index-advisor: Index Recommendation > Virtual Index" in Feature Guide.

hypopg_display_index([text])

Description: Displays information about all created virtual indexes.

Parameter: (optional) level of the virtual index to be displayed

Return type: record

For details, see section "DBMind: Autonomous Database O&M > AI Sub-functions of DBMind > Index-advisor: Index Recommendation > Virtual Index" in Feature Guide.

hypopg_drop_index(oid)

Description: Deletes a specified virtual index.

Parameter: OID of the index

Return type: Boolean

For details, see section "DBMind: Autonomous Database O&M > AI Sub-functions of DBMind > Index-advisor: Index Recommendation > Virtual Index" in Feature Guide.

hypopg_reset_index([text])

Description: Clears all virtual indexes.

Parameter: (optional) level of the virtual index to be cleared

Return type: none

For details, see section "DBMind: Autonomous Database O&M > AI Sub-functions of DBMind > Index-advisor: Index Recommendation > Virtual Index" in Feature Guide.

hypopg_estimate_size(oid)

Description: Estimates the space required for creating a specified index.

Parameter: OID of the index

Return type: int8

For details, see section "DBMind: Autonomous Database O&M > AI Sub-functions of DBMind > Index-advisor: Index Recommendation > Virtual Index" in Feature Guide.

db4ai_predict_by_bool (text, VARIADIC "any")

Description: Obtains a model whose return value is of the Boolean type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: Boolean

db4ai_predict_by_float4(text, VARIADIC "any")

Description: Obtains a model whose return value is of the float4 type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: float

db4ai_predict_by_float8(text, VARIADIC "any")

Description: Obtains a model whose return value is of the float8 type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: float

db4ai_predict_by_int32(text, VARIADIC "any")

Description: Obtains a model whose return value is of the int32 type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: int

db4ai_predict_by_int64(text, VARIADIC "any")

Description: Obtains a model whose return value is of the int64 type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: int

db4ai_predict_by_numeric(text, VARIADIC "any")

Description: Obtains a model whose return value is of the numeric type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: numeric

db4ai_predict_by_text(text, VARIADIC "any")

Description: Obtains a model whose return value is of the character type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: text

db4ai_predict_by_float8_array(text, VARIADIC "any")

Description: Obtains a model whose return value is of the character type for model inference. This function is an internal function. You are advised to use the PREDICT BY syntax for inference.

Parameter: model name and input column name of the inference task

Return type: text

gs_explain_model(text)

Description: Obtains the model whose return value is of the character type for text-based model parsing.

Parameter: model name

Return type: text

gs_ai_stats_explain(text, text[])

Description: Prints the intelligent statistics of multiple columns in the corresponding table and columns on the current node.

Parameters: table name and column name collection.

Return type: text

gs_acm_analyze_workload_manual()

Description: Manually trains the cardinality estimation model based on the operator feedback data in the current database.

Parameter: none

Return type: text

Description: This function is unavailable in the current version.

gs_stat_get_acm_feedback_operator_info()

Description: Displays all operator feedback data collected in the global memory.

Parameter: none

Return type: record

Description: This function is unavailable in the current version.

gs_stat_get_sql_feedback_info()

Description: Displays the number of times that SQL statements are used and the execution time when SQL statements are used and not used within the effective range of the feedback cardinality function in the global memory.

Parameter: none

Return type: record

Description: This function is unavailable in the current version.

gs_costmodel_calibration_manual()

Description: Manually triggers operator time collection and corrects cost model parameters.

Parameter: none

Return type: text

Description: This function is unavailable in the current version.

gs_show_aplan(cstring)

Description: Views the multi-plan cache of queries cached in the current session.

Parameter: prepare name is used to search for the corresponding cache plan.

Return type: text

Description: This function is unavailable in the current version.

ai_watchdog_detection_warnings()

Description: Obtains the risk alarm information of the AI watchdog. The SYSADMIN or MONADMIN access permission is required.

Parameter: none

Return type: record

ai_watchdog_monitor_status(int)

Description: Obtains the monitoring information of the AI watchdog. The SYSADMIN or MONADMIN access permission is required.

Parameter: Returns the upper limit of the length of the monitored sequence.

Return type: record

ai_watchdog_parameters()

Description: Obtains the internal parameters or status information of the AI watchdog. The SYSADMIN or MONADMIN access permission is required.

Parameter: none

Return type: record