61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package metadata
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import (
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"database/sql"
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"fmt"
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"github.com/go-jet/jet/v2/internal/utils"
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)
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// SchemaMetaData struct
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type SchemaMetaData struct {
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TablesMetaData []MetaData
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ViewsMetaData []MetaData
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EnumsMetaData []MetaData
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}
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// IsEmpty returns true if schema info does not contain any table, views or enums metadata
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func (s SchemaMetaData) IsEmpty() bool {
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return len(s.TablesMetaData) == 0 && len(s.ViewsMetaData) == 0 && len(s.EnumsMetaData) == 0
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}
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const (
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baseTable = "BASE TABLE"
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view = "VIEW"
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)
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// GetSchemaMetaData returns schema information from db connection.
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func GetSchemaMetaData(db *sql.DB, schemaName string, querySet DialectQuerySet) (schemaInfo SchemaMetaData) {
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schemaInfo.TablesMetaData = getTablesMetaData(db, querySet, schemaName, baseTable)
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schemaInfo.ViewsMetaData = getTablesMetaData(db, querySet, schemaName, view)
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schemaInfo.EnumsMetaData = querySet.GetEnumsMetaData(db, schemaName)
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fmt.Println(" FOUND", len(schemaInfo.TablesMetaData), "table(s),", len(schemaInfo.ViewsMetaData), "view(s),",
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len(schemaInfo.EnumsMetaData), "enum(s)")
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return
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}
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func getTablesMetaData(db *sql.DB, querySet DialectQuerySet, schemaName, tableType string) []MetaData {
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rows, err := db.Query(querySet.ListOfTablesQuery(), schemaName, tableType)
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utils.PanicOnError(err)
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defer rows.Close()
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ret := []MetaData{}
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for rows.Next() {
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var tableName string
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err = rows.Scan(&tableName)
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utils.PanicOnError(err)
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tableInfo := GetTableMetaData(db, querySet, schemaName, tableName)
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ret = append(ret, tableInfo)
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}
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err = rows.Err()
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utils.PanicOnError(err)
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return ret
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}
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