89 lines
2.1 KiB
Go
89 lines
2.1 KiB
Go
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package mysql
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import (
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"database/sql"
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"github.com/go-jet/jet/generator/internal/metadata"
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"strings"
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)
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// mySqlQuerySet is dialect query set for MySQL
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type mySqlQuerySet struct{}
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func (m *mySqlQuerySet) ListOfTablesQuery() string {
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return `
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SELECT table_name
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FROM INFORMATION_SCHEMA.tables
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WHERE table_schema = ? and table_type = 'BASE TABLE';
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`
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}
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func (m *mySqlQuerySet) PrimaryKeysQuery() string {
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return `
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SELECT k.column_name
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FROM information_schema.table_constraints t
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JOIN information_schema.key_column_usage k
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USING(constraint_name,table_schema,table_name)
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WHERE t.constraint_type='PRIMARY KEY'
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AND t.table_schema= ?
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AND t.table_name= ?;
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`
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}
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func (m *mySqlQuerySet) ListOfColumnsQuery() string {
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return `
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SELECT COLUMN_NAME,
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IS_NULLABLE, IF(COLUMN_TYPE = 'tinyint(1)', 'boolean', DATA_TYPE),
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IF(DATA_TYPE = 'enum', CONCAT(TABLE_NAME, '_', COLUMN_NAME), ''),
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COLUMN_TYPE LIKE '%unsigned%'
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FROM information_schema.columns
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WHERE table_schema = ? and table_name = ?
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ORDER BY ordinal_position;
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`
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}
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func (m *mySqlQuerySet) ListOfEnumsQuery() string {
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return `
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SELECT (CASE c.DATA_TYPE WHEN 'enum' then CONCAT(c.TABLE_NAME, '_', c.COLUMN_NAME) ELSE '' END ), SUBSTRING(c.COLUMN_TYPE,5)
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FROM information_schema.columns as c
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INNER JOIN information_schema.tables as t on (t.table_schema = c.table_schema AND t.table_name = c.table_name)
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WHERE c.table_schema = ? AND DATA_TYPE = 'enum' AND t.TABLE_TYPE = 'BASE TABLE';
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`
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}
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func (m *mySqlQuerySet) GetEnumsMetaData(db *sql.DB, schemaName string) ([]metadata.MetaData, error) {
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rows, err := db.Query(m.ListOfEnumsQuery(), schemaName)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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ret := []metadata.MetaData{}
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for rows.Next() {
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var enumName string
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var enumValues string
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err = rows.Scan(&enumName, &enumValues)
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if err != nil {
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return nil, err
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}
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enumValues = strings.Replace(enumValues[1:len(enumValues)-1], "'", "", -1)
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ret = append(ret, metadata.EnumMetaData{
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EnumName: enumName,
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Values: strings.Split(enumValues, ","),
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})
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}
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err = rows.Err()
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if err != nil {
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return nil, err
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}
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return ret, nil
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}
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