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generator: support MySQL 5.7

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MySQL 5.7 does not support CTE's. Refactor the table column metadata
query to avoid the CTE.
This commit is contained in:
Karl Blomster 2021-12-14 18:22:58 +01:00
parent 60ffd004c5
commit 4d404d8853
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1 changed files with 6 additions and 7 deletions
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13
generator/mysql/query_set.go
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@ -32,15 +32,14 @@ WHERE table_schema = ? and table_type = ?;
func (m mySqlQuerySet) GetTableColumnsMetaData(db *sql.DB, schemaName string, tableName string) []metadata.Column {
query := `
WITH primaryKeys AS (
SELECT k.column_name
FROM information_schema.table_constraints t
JOIN information_schema.key_column_usage k USING(constraint_name,table_schema,table_name)
WHERE table_schema = ? AND table_name = ? AND t.constraint_type='PRIMARY KEY'
)
SELECT COLUMN_NAME AS "column.Name",
IS_NULLABLE = "YES" AS "column.IsNullable",
(EXISTS(SELECT 1 FROM primaryKeys AS pk WHERE pk.column_name = columns.column_name)) AS "column.IsPrimaryKey",
(EXISTS(
SELECT 1
FROM information_schema.table_constraints t
JOIN information_schema.key_column_usage k USING(constraint_name,table_schema,table_name)
WHERE table_schema = ? AND table_name = ? AND t.constraint_type='PRIMARY KEY' AND k.column_name = columns.column_name
)) AS "column.IsPrimaryKey",
IF (COLUMN_TYPE = 'tinyint(1)',
'boolean',
IF (DATA_TYPE='enum',