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Add sample script to update database character set
Co-authored-by: Miguel Angel Medinilla <[email protected]>
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admin-manual/installation-setup/upgrading/scripts/mysql-change-encoding-collation.sh
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| #!/usr/bin/env bash | ||
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| set -o errexit # abort on nonzero exitstatus | ||
| set -o nounset # abort on unbound variable | ||
| set -o pipefail # do not hide errors within pipes | ||
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| # Array of database names | ||
| DATABASES=( | ||
| MCP | ||
| SS | ||
| ) | ||
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| # Collation and CHARSET | ||
| CHARSET="utf8mb4" | ||
| COLLATION="utf8mb4_0900_ai_ci" | ||
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| # MySQL authentication (optional, default no auth) | ||
| MYSQL_USE_AUTH=False | ||
| MYSQL_USER=root | ||
| MYSQL_PASSWORD="THE_PASSWORD" | ||
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| # Function to execute a query | ||
| execute_query() { | ||
| local query="$1" | ||
| local db_name="$2" | ||
| local user_arg="" | ||
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| if [ "$MYSQL_USE_AUTH" = "True" ]; then | ||
| user_arg="-u$MYSQL_USER" | ||
| export MYSQL_PWD="$MYSQL_PASSWORD" | ||
| fi | ||
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| mysql -N -B $user_arg -e "$query" "$db_name" | ||
| } | ||
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| # Function to fix database charset and collation | ||
| fix_database_charset() { | ||
| local query="ALTER DATABASE ${DB_NAME} CHARACTER SET $CHARSET COLLATE $COLLATION;" | ||
| echo "Fixing database charset and collation" | ||
| execute_query "$query" "$DB_NAME" | ||
| echo "Fixed database charset and collation" | ||
| } | ||
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| # Function to fix tables charset and collation | ||
| fix_tables_charset() { | ||
| local query="SELECT CONCAT('ALTER TABLE \`', table_name, '\` CHARACTER SET $CHARSET COLLATE $COLLATION;') \ | ||
| FROM information_schema.TABLES AS T, information_schema.\`COLLATION_CHARACTER_SET_APPLICABILITY\` AS C \ | ||
| WHERE C.collation_name = T.table_collation \ | ||
| AND T.table_schema = '$DB_NAME' \ | ||
| AND (C.CHARACTER_SET_NAME != '$CHARSET' OR C.COLLATION_NAME != '$COLLATION');" | ||
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| local alter_table_queries=$(execute_query "$query" "$DB_NAME") | ||
| alter_table_queries_no_foreign_key_checks=$(echo -e "SET FOREIGN_KEY_CHECKS=0;\n$alter_table_queries\nSET FOREIGN_KEY_CHECKS=1;") | ||
| # echo "$alter_table_queries_no_foreign_key_checks" | ||
| echo "Fixing tables charset and collation" | ||
| execute_query "$alter_table_queries_no_foreign_key_checks" "$DB_NAME" | ||
| echo "Fixed tables charset and collation" | ||
| } | ||
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| # Function to fix column collation for varchar columns | ||
| fix_varchar_columns_collation() { | ||
| local query="SELECT CONCAT('ALTER TABLE \`', table_name, '\` MODIFY \`', column_name, '\` ', DATA_TYPE, \ | ||
| '(', CHARACTER_MAXIMUM_LENGTH, ') CHARACTER SET $CHARSET COLLATE $COLLATION', \ | ||
| (CASE WHEN IS_NULLABLE = 'NO' THEN ' NOT NULL' ELSE '' END), ';') \ | ||
| FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '$DB_NAME' AND DATA_TYPE = 'varchar' AND \ | ||
| ( CHARACTER_SET_NAME != '$CHARSET' OR COLLATION_NAME != '$COLLATION');" | ||
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| local alter_table_queries=$(execute_query "$query" "$DB_NAME") | ||
| alter_table_queries_no_foreign_key_checks=$(echo -e "SET FOREIGN_KEY_CHECKS=0;\n$alter_table_queries\nSET FOREIGN_KEY_CHECKS=1;") | ||
| # echo "$alter_table_queries_no_foreign_key_checks" | ||
| echo "Fixing column collation for varchar columns" | ||
| execute_query "$alter_table_queries_no_foreign_key_checks" "$DB_NAME" | ||
| echo "Fixed column collation for varchar columns" | ||
| } | ||
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| # Function to fix column collation for non-varchar columns | ||
| fix_non_varchar_columns_collation() { | ||
| local query="SELECT CONCAT('ALTER TABLE \`', table_name, '\` MODIFY \`', column_name, '\` ', DATA_TYPE, ' \ | ||
| CHARACTER SET $CHARSET COLLATE $COLLATION', (CASE WHEN IS_NULLABLE = 'NO' THEN ' NOT NULL' ELSE '' END), ';') \ | ||
| FROM information_schema.COLUMNS \ | ||
| WHERE TABLE_SCHEMA = '$DB_NAME' \ | ||
| AND DATA_TYPE != 'varchar' \ | ||
| AND (CHARACTER_SET_NAME != '$CHARSET' OR COLLATION_NAME != '$COLLATION');" | ||
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| local alter_table_queries=$(execute_query "$query" "$DB_NAME") | ||
| alter_table_queries_no_foreign_key_checks=$(echo -e "SET FOREIGN_KEY_CHECKS=0;\n$alter_table_queries\nSET FOREIGN_KEY_CHECKS=1;") | ||
| # echo "$alter_table_queries_no_foreign_key_checks" | ||
| echo "Fixing column collation for non-varchar columns" | ||
| execute_query "$alter_table_queries_no_foreign_key_checks" "$DB_NAME" | ||
| echo "Fixed column collation for non-varchar columns" | ||
| } | ||
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| # Loop through each database in the array | ||
| for DB_NAME in "${DATABASES[@]}"; do | ||
| echo "Processing database: $DB_NAME" | ||
| fix_database_charset | ||
| fix_tables_charset | ||
| fix_varchar_columns_collation | ||
| fix_non_varchar_columns_collation | ||
| echo "Migration completed for $DB_NAME" | ||
| done | ||
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| # Unset the MYSQL_PWD environment variable after executing the queries | ||
| unset MYSQL_PWD |
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