MARS-1005-PREHOOK
This commit is contained in:
Grzegorz Michalski
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create or replace PACKAGE CT_MRDS.DATA_EXPORTER
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AUTHID CURRENT_USER
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AS
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/**
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* Data Export Package: Provides comprehensive data export capabilities to various formats (CSV, Parquet)
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* with support for cloud storage integration via Oracle Cloud Infrastructure (OCI).
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* The structure of comment is used by GET_PACKAGE_DOCUMENTATION function
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* which returns documentation text for confluence page (to Copy-Paste it).
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**/
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-- Package Version Information
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PACKAGE_VERSION CONSTANT VARCHAR2(10) := '2.14.0';
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PACKAGE_BUILD_DATE CONSTANT VARCHAR2(20) := '2026-02-25 09:00:00';
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PACKAGE_AUTHOR CONSTANT VARCHAR2(100) := 'Grzegorz Michalski';
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-- Version History (last 3-5 changes)
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VERSION_HISTORY CONSTANT VARCHAR2(4000) :=
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'v2.14.0 (2026-02-25): OPTIMIZATION - Added pTaskName parameter to EXPORT_PARTITION_PARALLEL for deterministic filtering. Replaced FETCH FIRST 1 ROW ONLY safeguard with precise WHERE CHUNK_ID AND TASK_NAME filter. Eliminates ORDER BY overhead and provides cleaner session isolation.' || CHR(10) ||
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'v2.13.1 (2026-02-25): CRITICAL FIX - Added START_ID and END_ID aliasses in CREATE_CHUNKS_BY_SQL to avoid ORA-00960 ambiguous column naming error.' || CHR(10) ||
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'v2.13.0 (2026-02-25): CRITICAL SESSION ISOLATION FIX - Changed CREATE_CHUNKS_BY_NUMBER_COL to CREATE_CHUNKS_BY_SQL with TASK_NAME filter (fixes ORA-01422 in concurrent sessions). Added ORDER BY CREATED_DATE DESC FETCH FIRST 1 ROW safeguard to EXPORT_PARTITION_PARALLEL SELECT. Composite PK (TASK_NAME, CHUNK_ID) now fully functional.' || CHR(10) ||
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'v2.12.0 (2026-02-24): CRITICAL FIX - Rewritten DELETE_FAILED_EXPORT_FILE to use file-specific pattern matching (prevents deleting parallel CSV chunks in shared folder). Added vQuery logging before DBMS_CLOUD calls. Added CSV maxfilesize logging.' || CHR(10) ||
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'v2.11.0 (2026-02-18): Added pJobClass parameter to EXPORT_TABLE_DATA_BY_DATE and EXPORT_TABLE_DATA_TO_CSV_BY_DATE for Oracle Scheduler job class support (resource/priority management).' || CHR(10);
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cgBL CONSTANT VARCHAR2(2) := CHR(13)||CHR(10);
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vgMsgTmp VARCHAR2(32000);
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---------------------------------------------------------------------------------------------------------------------------
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-- TYPE DEFINITIONS FOR PARTITION HANDLING
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---------------------------------------------------------------------------------------------------------------------------
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/**
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* Record type for year/month partition information
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**/
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TYPE partition_rec IS RECORD (
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year VARCHAR2(4),
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month VARCHAR2(2)
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);
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/**
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* Table type for collection of partition records
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**/
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TYPE partition_tab IS TABLE OF partition_rec;
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---------------------------------------------------------------------------------------------------------------------------
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-- INTERNAL PARALLEL PROCESSING CALLBACK
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---------------------------------------------------------------------------------------------------------------------------
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/**
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* @name EXPORT_PARTITION_PARALLEL
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* @desc Internal callback procedure for DBMS_PARALLEL_EXECUTE.
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* Processes single partition (year/month) chunk in parallel task.
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* Called by DBMS_PARALLEL_EXECUTE framework for each chunk.
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* This procedure is PUBLIC because DBMS_PARALLEL_EXECUTE requires it,
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* but should NOT be called directly by external code.
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* @param pStartId - Chunk start ID (CHUNK_ID from A_PARALLEL_EXPORT_CHUNKS table)
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* @param pEndId - Chunk end ID (same as pStartId for single-row chunks)
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* @param pTaskName - Task name for session isolation (optional, DEFAULT NULL for backward compatibility)
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**/
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PROCEDURE EXPORT_PARTITION_PARALLEL (
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pStartId IN NUMBER,
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pEndId IN NUMBER,
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pTaskName IN VARCHAR2 DEFAULT NULL
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);
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---------------------------------------------------------------------------------------------------------------------------
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-- MAIN EXPORT PROCEDURES
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---------------------------------------------------------------------------------------------------------------------------
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/**
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* @name EXPORT_TABLE_DATA
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* @desc Wrapper procedure for DBMS_CLOUD.EXPORT_DATA.
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* Exports data into single CSV file on OCI infrastructure.
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* pBucketArea parameter accepts: 'INBOX', 'ODS', 'DATA', 'ARCHIVE'
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* Supports template table for column order and per-column date formatting.
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* When pRegisterExport=TRUE, successfully exported file is registered in:
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* - CT_MRDS.A_SOURCE_FILE_RECEIVED (tracks file location, size, checksum, and metadata)
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* @param pFileName - Optional filename (e.g., 'export.csv'). NULL = auto-generate from table name
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* @param pTemplateTableName - Optional template table (SCHEMA.TABLE or TABLE) for:
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* - Column order control (template defines CSV structure)
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* - Per-column date formatting via FILE_MANAGER.GET_DATE_FORMAT
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* - NULL = use source table columns in natural order
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* @param pMaxFileSize - Maximum file size in bytes (default 104857600 = 100MB, min 10MB, max 1GB)
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* @param pRegisterExport - When TRUE, registers exported CSV file in A_SOURCE_FILE_RECEIVED table
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* @param pProcessName - Process name stored in PROCESS_NAME column (default 'DATA_EXPORTER')
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* @example
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* begin
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* DATA_EXPORTER.EXPORT_TABLE_DATA(
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* pSchemaName => 'CT_MRDS',
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* pTableName => 'MY_TABLE',
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* pKeyColumnName => 'A_ETL_LOAD_SET_KEY_FK',
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* pBucketArea => 'DATA',
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* pFolderName => 'csv_exports',
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* pFileName => 'my_export.csv', -- Optional
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* pTemplateTableName => 'CT_ET_TEMPLATES.MY_TEMPLATE', -- Optional
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* pMaxFileSize => 104857600, -- Optional, default 100MB
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* pRegisterExport => TRUE -- Optional, default FALSE
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* );
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* end;
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**/
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PROCEDURE EXPORT_TABLE_DATA (
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pSchemaName IN VARCHAR2,
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pTableName IN VARCHAR2,
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pKeyColumnName IN VARCHAR2,
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pBucketArea IN VARCHAR2,
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pFolderName IN VARCHAR2,
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pFileName IN VARCHAR2 default NULL,
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pTemplateTableName IN VARCHAR2 default NULL,
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pMaxFileSize IN NUMBER default 104857600,
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pRegisterExport IN BOOLEAN default FALSE,
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pProcessName IN VARCHAR2 default 'DATA_EXPORTER',
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pCredentialName IN VARCHAR2 default ENV_MANAGER.gvCredentialName
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);
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/**
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* @name EXPORT_TABLE_DATA_BY_DATE
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* @desc Wrapper procedure for DBMS_CLOUD.EXPORT_DATA.
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* Exports data into PARQUET files on OCI infrustructure.
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* Each YEAR_MONTH pair goes to seperate file (implicit partitioning).
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* Allows specifying custom column list or uses T.* if pColumnList is NULL.
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* Validates that all columns in pColumnList exist in the target table.
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* Automatically adds 'T.' prefix to column names in pColumnList.
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* Supports parallel partition processing via pParallelDegree parameter (default 1, range 1-16).
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* pBucketArea parameter accepts: 'INBOX', 'ODS', 'DATA', 'ARCHIVE'
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* @example
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* begin
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* DATA_EXPORTER.EXPORT_TABLE_DATA_BY_DATE(
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* pSchemaName => 'CT_MRDS',
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* pTableName => 'MY_TABLE',
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* pKeyColumnName => 'A_ETL_LOAD_SET_KEY_FK',
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* pBucketArea => 'DATA',
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* pFolderName => 'parquet_exports',
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* pColumnList => 'COLUMN1, COLUMN2, COLUMN3', -- Optional
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* pMinDate => DATE '2024-01-01',
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* pMaxDate => SYSDATE,
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* pParallelDegree => 8 -- Optional, default 1, range 1-16
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* );
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* end;
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**/
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PROCEDURE EXPORT_TABLE_DATA_BY_DATE (
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pSchemaName IN VARCHAR2,
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pTableName IN VARCHAR2,
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pKeyColumnName IN VARCHAR2,
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pBucketArea IN VARCHAR2,
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pFolderName IN VARCHAR2,
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pColumnList IN VARCHAR2 default NULL,
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pMinDate IN DATE default DATE '1900-01-01',
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pMaxDate IN DATE default SYSDATE,
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pParallelDegree IN NUMBER default 1,
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pTemplateTableName IN VARCHAR2 default NULL,
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pJobClass IN VARCHAR2 default NULL,
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pCredentialName IN VARCHAR2 default ENV_MANAGER.gvCredentialName
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);
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/**
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* @name EXPORT_TABLE_DATA_TO_CSV_BY_DATE
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* @desc Exports data to separate CSV files partitioned by year and month.
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* Creates one CSV file for each year/month combination found in the data.
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* Uses the same date filtering mechanism with CT_ODS.A_LOAD_HISTORY as EXPORT_TABLE_DATA_BY_DATE,
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* but exports to CSV format instead of Parquet.
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* Supports parallel partition processing via pParallelDegree parameter (1-16).
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* File naming pattern: {pFileName}_YYYYMM.csv or {TABLENAME}_YYYYMM.csv (if pFileName is NULL)
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* When pRegisterExport=TRUE, successfully exported files are registered in:
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* - CT_MRDS.A_SOURCE_FILE_RECEIVED (tracks file location, size, checksum, and metadata)
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* @param pProcessName - Process name stored in PROCESS_NAME column (default 'DATA_EXPORTER')
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* @example
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* begin
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* -- With custom filename
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* DATA_EXPORTER.EXPORT_TABLE_DATA_TO_CSV_BY_DATE(
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* pSchemaName => 'CT_MRDS',
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* pTableName => 'MY_TABLE',
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* pKeyColumnName => 'A_ETL_LOAD_SET_KEY_FK',
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* pBucketArea => 'DATA',
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* pFolderName => 'exports',
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* pFileName => 'my_export.csv',
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* pMinDate => DATE '2024-01-01',
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* pMaxDate => SYSDATE,
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* pParallelDegree => 8, -- Optional, default 1, range 1-16
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* pRegisterExport => TRUE -- Optional, default FALSE, registers to A_SOURCE_FILE_RECEIVED
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* );
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*
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* -- With auto-generated filename (based on table name only)
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* DATA_EXPORTER.EXPORT_TABLE_DATA_TO_CSV_BY_DATE(
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* pSchemaName => 'OU_TOP',
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* pTableName => 'AGGREGATED_ALLOTMENT',
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* pKeyColumnName => 'A_ETL_LOAD_SET_KEY_FK',
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* pBucketArea => 'ARCHIVE',
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* pFolderName => 'exports',
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* pMinDate => DATE '2025-09-01',
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* pMaxDate => DATE '2025-09-17',
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* pRegisterExport => TRUE -- Registers each export to A_SOURCE_FILE_RECEIVED table
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* );
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* -- This will create files like: AGGREGATED_ALLOTMENT_202509.csv, etc.
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* pBucketArea parameter accepts: 'INBOX', 'ODS', 'DATA', 'ARCHIVE'
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* end;
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**/
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PROCEDURE EXPORT_TABLE_DATA_TO_CSV_BY_DATE (
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pSchemaName IN VARCHAR2,
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pTableName IN VARCHAR2,
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pKeyColumnName IN VARCHAR2,
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pBucketArea IN VARCHAR2,
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pFolderName IN VARCHAR2,
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pFileName IN VARCHAR2 DEFAULT NULL,
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pColumnList IN VARCHAR2 default NULL,
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pMinDate IN DATE default DATE '1900-01-01',
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pMaxDate IN DATE default SYSDATE,
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pParallelDegree IN NUMBER default 1,
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pTemplateTableName IN VARCHAR2 default NULL,
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pMaxFileSize IN NUMBER default 104857600,
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pRegisterExport IN BOOLEAN default FALSE,
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pProcessName IN VARCHAR2 default 'DATA_EXPORTER',
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pJobClass IN VARCHAR2 default NULL,
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pCredentialName IN VARCHAR2 default ENV_MANAGER.gvCredentialName
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);
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---------------------------------------------------------------------------------------------------------------------------
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-- VERSION MANAGEMENT FUNCTIONS
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---------------------------------------------------------------------------------------------------------------------------
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/**
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* Returns the current package version number
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* return: Version string in format X.Y.Z (e.g., '2.1.0')
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**/
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FUNCTION GET_VERSION RETURN VARCHAR2;
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/**
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* Returns comprehensive build information including version, date, and author
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* return: Formatted string with complete build details
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**/
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FUNCTION GET_BUILD_INFO RETURN VARCHAR2;
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/**
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* Returns the version history with recent changes
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* return: Multi-line string with version history
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**/
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FUNCTION GET_VERSION_HISTORY RETURN VARCHAR2;
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END;
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/
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