Commit 9924e189 authored by Leo Gordon's avatar Leo Gordon
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schema_change: a patch to include the live_roles view in the list of tables...

schema_change: a patch to include the live_roles view in the list of tables affected by drop_hive_tables
parent 5a091cad
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docs/hive_schema.png

261 KB | W: | H:

docs/hive_schema.png

262 KB | W: | H:

docs/hive_schema.png
docs/hive_schema.png
docs/hive_schema.png
docs/hive_schema.png
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-- ---------------------------------------------------------------------------------------------------
SET @expected_version = 71;
-- make MySQL stop immediately after it encounters division by zero:
SET SESSION sql_mode='TRADITIONAL';
-- warn that we detected the schema version mismatch:
SELECT CONCAT( 'The patch only applies to schema version ',
@expected_version,
', but the current schema version is ',
meta_value,
', so skipping the rest.') AS ''
FROM hive_meta WHERE meta_key='hive_sql_schema_version' AND meta_value<>@expected_version;
-- cause division by zero only if current version differs from the expected one:
INSERT INTO hive_meta (meta_key, meta_value)
SELECT 'this_should_never_be_inserted', 1 FROM hive_meta WHERE NOT 1/(meta_key<>'hive_sql_schema_version' OR meta_value=@expected_version);
SELECT CONCAT( 'The patch seems to be compatible with schema version ',
@expected_version,
', applying the patch...') AS '';
-- Now undo the change so that we could patch potentially non-TRADITIONAL schema:
SET SESSION sql_mode='';
-- ----------------------------------<actual_patch> -------------------------------------------------
DROP PROCEDURE IF EXISTS drop_hive_tables;
DELIMITER //
CREATE PROCEDURE drop_hive_tables()
MODIFIES SQL DATA
BEGIN
DROP VIEW IF EXISTS msg, progress, resource_usage_stats, live_roles;
DROP TABLE IF EXISTS pipeline_wide_parameters, analysis_stats_monitor, worker_resource_usage, resource_description, analysis_data, job_file, dataflow_rule, analysis_ctrl_rule, analysis_stats, log_message, accu, job, role, worker, analysis_base, resource_class, hive_meta;
END; //
DELIMITER ;
-- ----------------------------------</actual_patch> -------------------------------------------------
-- increase the schema version by one:
UPDATE hive_meta SET meta_value=meta_value+1 WHERE meta_key='hive_sql_schema_version';
-- ---------------------------------------------------------------------------------------------------
\set expected_version 71
\set ON_ERROR_STOP on
-- warn that we detected the schema version mismatch:
SELECT ('The patch only applies to schema version '
|| CAST(:expected_version AS VARCHAR)
|| ', but the current schema version is '
|| meta_value
|| ', so skipping the rest.') as incompatible_msg
FROM hive_meta WHERE meta_key='hive_sql_schema_version' AND meta_value!=CAST(:expected_version AS VARCHAR);
-- cause division by zero only if current version differs from the expected one:
INSERT INTO hive_meta (meta_key, meta_value)
SELECT 'this_should_never_be_inserted', 1 FROM hive_meta WHERE 1 != 1/CAST( (meta_key!='hive_sql_schema_version' OR meta_value=CAST(:expected_version AS VARCHAR)) AS INTEGER );
SELECT ('The patch seems to be compatible with schema version '
|| CAST(:expected_version AS VARCHAR)
|| ', applying the patch...') AS compatible_msg;
-- ----------------------------------<actual_patch> -------------------------------------------------
-- the patch is trivial for PostgreSQL
-- ----------------------------------</actual_patch> -------------------------------------------------
-- increase the schema version by one:
UPDATE hive_meta SET meta_value= (CAST(meta_value AS INTEGER) + 1) WHERE meta_key='hive_sql_schema_version';
-- ---------------------------------------------------------------------------------------------------
CREATE TEMPORARY VIEW exp_ver AS SELECT "71" AS expected_version;
.bail ON
SELECT ('The patch only applies to schema version '
|| expected_version
|| ', but the current schema version is '
|| meta_value
|| ', skipping the rest.') AS ''
FROM hive_meta JOIN exp_ver WHERE meta_key='hive_sql_schema_version' AND meta_value<>expected_version;
INSERT INTO hive_meta (meta_key, meta_value)
SELECT hm.* FROM hive_meta AS hm JOIN exp_ver WHERE meta_key='hive_sql_schema_version' AND meta_value<>expected_version;
SELECT ('The patch seems to be compatible with schema version '
|| expected_version
|| ', applying the patch...') AS '' FROM exp_ver;
-- ----------------------------------<actual_patch> -------------------------------------------------
-- the patch is trivial for SQLite
-- ----------------------------------</actual_patch> -------------------------------------------------
-- increase the schema version by one:
UPDATE hive_meta SET meta_value=meta_value+1 WHERE meta_key='hive_sql_schema_version';
......@@ -166,7 +166,7 @@ DELIMITER //
CREATE PROCEDURE drop_hive_tables()
MODIFIES SQL DATA
BEGIN
DROP VIEW IF EXISTS msg, progress, resource_usage_stats;
DROP VIEW IF EXISTS msg, progress, resource_usage_stats, live_roles;
DROP TABLE IF EXISTS pipeline_wide_parameters, analysis_stats_monitor, worker_resource_usage, resource_description, analysis_data, job_file, dataflow_rule, analysis_ctrl_rule, analysis_stats, log_message, accu, job, role, worker, analysis_base, resource_class, hive_meta;
END; //
DELIMITER ;
......
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