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Alter all tables in a given schema from InnoDB to TokuDB
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#!/bin/sh | |
SCRIPT_NAME=`basename $0 | sed -e "s/\.sh$//"` | |
[ -z "${TMP_DIR}" ] && TMP_DIR="/tmp" | |
TMP_FILE="${TMP_DIR}/${SCRIPT_NAME}.tmp.$$" | |
[ -z "${LOG_DIR}" ] && LOG_DIR="/opt/pythian/log" | |
[ ! -d "${LOG_DIR}" ] && echo "ERROR: Log directory '${LOG_DIR}' is not accessible." && exit 1 | |
[ -z "${SCHEMA}" ] && SCHEMA="test" | |
[ -z "${SOURCE_ENGINE}" ] && SOURCE_ENGINE="InnoDB" | |
[ -z "${ROW_FORMAT}" ] && ROW_FORMAT="TOKUDB_LZMA" | |
generate_foreign_keys() { | |
local FILE=$1 | |
[ -z "${FILE}" ] && echo "INTERNAL ERROR: No file passed" && exit 1 | |
echo "Generating foreign keys in '${SCHEMA}'" | |
mysql -N -u${MYSQL_USER} -p${MYSQL_PWD} -e "SELECT CONCAT('ALTER TABLE ',table_schema,'.',table_name,' DROP FOREIGN KEY ',constraint_name,';') FROM information_schema.table_constraints WHERE CONSTRAINT_TYPE = 'FOREIGN KEY' AND CONSTRAINT_SCHEMA=DATABASE();" ${SCHEMA} > ${FILE} | |
RC=$? | |
[ ${RC} -ne 0 ] && echo "ERROR: select of foreign keys failed" && exit ${RC} | |
return 0 | |
} | |
drop_foreign_keys() { | |
local FILE=$1 | |
[ -z "${FILE}" ] && echo "INTERNAL ERROR: No file passed" && exit 1 | |
echo "Dropping foreign keys in '${SCHEMA}' with '${FILE}'" | |
mysql -vvv -u${MYSQL_USER} -p${MYSQL_PWD} ${SCHEMA} < ${FILE} | |
RC=$? | |
[ ${RC} -ne 0 ] && echo "ERROR: drop of foreign keys failed" && exit ${RC} | |
return 0 | |
} | |
alter_tables() { | |
local FILE=$1 | |
[ -z "${FILE}" ] && echo "INTERNAL ERROR: No file passed" && exit 1 | |
mysql -N -u${MYSQL_USER} -p${MYSQL_PWD} -e "SELECT CONCAT('SELECT NOW();ALTER TABLE ',TABLE_NAME,' ENGINE=TokuDB, ROW_FORMAT=${ROW_FORMAT};') FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND engine = '${SOURCE_ENGINE}'" ${SCHEMA} > ${FILE} | |
RC=$? | |
[ ${RC} -ne 0 ] && echo "ERROR: Unable to generate alter file for '${SOURCE_ENGINE}' tables" && exit ${RC} | |
time mysql -vvv -u$MYSQL_USER -p$MYSQL_PWD ${SCHEMA} < ${FILE} | |
RC=$? | |
[ ${RC} -ne 0 ] && echo "ERROR: Alter of tables failed" && exit ${RC} | |
return 0 | |
} | |
# Ensure environment variables to access MySQL environment via script are defined | |
[ -z "${MYSQL_USER}" -o -z "${MYSQL_PWD}" ] && echo "ERROR: MySQL credentials are not defined" && exit 2 | |
# Generate the foreign keys that are to be dropped | |
FK_FILE="${LOG_DIR}/drop_foreign_keys.pre.sql" | |
generate_foreign_keys ${FK_FILE} | |
[ -s "${FK_FILE}" ] && drop_foreign_keys ${FK_FILE} | |
# Verify there are no foreign keys left | |
FK_FILE="${LOG_DIR}/drop_foreign_keys.post.sql" | |
generate_foreign_keys ${FK_FILE} | |
[ -s "${FK_FILE}" ] && echo "ERROR: foreign keys remain in '${FK_FILE}'" && exit 1 | |
echo "All foreign keys for Schema ${SCHEMA} removed" | |
ALTER_FILE="${LOG_DIR}/alter.sql" | |
alter_tables ${ALTER_FILE} | |
exit 0 |
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