zeroshade commented on code in PR #1593:
URL: https://github.com/apache/arrow-adbc/pull/1593#discussion_r1516612882
##########
go/adbc/driver/snowflake/connection.go:
##########
@@ -557,13 +587,204 @@ func (c *cnxn) populateMetadata(ctx context.Context,
depth adbc.ObjectDepth, cat
return metadataRecords, nil
}
+func (c *cnxn) populateConstraintSchema(ctx context.Context, depth
adbc.ObjectDepth, metadataRecords []internal.Metadata)
(map[internal.CatalogSchemaTable][]internal.ConstraintSchema, error) {
+ constraintLookup :=
make(map[internal.CatalogSchemaTable][]internal.ConstraintSchema)
+ tableConstraintsData, err := c.getConstraintsData(ctx, depth,
metadataRecords)
+ if err != nil {
+ return nil, err
+ }
+
+ fullyQualifiedConstraintSchemaLookup :=
make(map[string]internal.ConstraintSchema)
+ for _, data := range tableConstraintsData {
+ var fullyQualifiedConstraintName string
+ if data.fk_constraintName.Valid {
+ fullyQualifiedConstraintName =
getFullyQualifiedConstraintName(data.fkDbName.String, data.fkSchema.String,
data.fkTblName.String, data.fk_constraintName.String)
+ if _, exists :=
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName]; !exists {
+
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName] =
internal.ConstraintSchema{
+ ConstraintName:
data.fk_constraintName.String,
+ ConstraintType:
data.constraintType,
+ ConstraintColumnNames:
[]string{data.fkColName.String},
+ ConstraintColumnUsages:
[]internal.UsageSchema{
+ {
+ ForeignKeyCatalog:
data.dbName,
+ ForeignKeyDbSchema:
data.schema,
+ ForeignKeyTable:
data.tblName,
+ ForeignKeyColName:
data.colName,
+ },
+ },
+ }
+ } else {
+ constraintInfo :=
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName]
+ constraintInfo.ConstraintColumnNames =
append(constraintInfo.ConstraintColumnNames, data.fkColName.String)
+
+ constraintInfo.ConstraintColumnUsages =
append(constraintInfo.ConstraintColumnUsages, internal.UsageSchema{
+ ForeignKeyCatalog: data.dbName,
+ ForeignKeyDbSchema: data.schema,
+ ForeignKeyTable: data.tblName,
+ ForeignKeyColName: data.colName,
+ })
+
+
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName] =
constraintInfo
+ }
+ } else {
+ fullyQualifiedConstraintName =
getFullyQualifiedConstraintName(data.dbName, data.schema, data.tblName,
data.constraintName)
+ if _, exists :=
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName]; !exists {
+
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName] =
internal.ConstraintSchema{
+ ConstraintName:
data.constraintName,
+ ConstraintType:
data.constraintType,
+ ConstraintColumnNames:
[]string{data.colName},
+ }
+ } else {
+ constraintInfo :=
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName]
+ constraintInfo.ConstraintColumnNames =
append(constraintInfo.ConstraintColumnNames, data.colName)
+
fullyQualifiedConstraintSchemaLookup[fullyQualifiedConstraintName] =
constraintInfo
+ }
+ }
+ }
+
+ for key, constraintSchema := range fullyQualifiedConstraintSchemaLookup
{
+ catalogSchemaTable :=
getCatalogSchemaTableFromFullyQualifiedConstraintName(key)
+ constraintLookup[catalogSchemaTable] =
append(constraintLookup[catalogSchemaTable], constraintSchema)
+ }
+
+ return constraintLookup, nil
+}
+
+func (c *cnxn) getConstraintsData(ctx context.Context, depth adbc.ObjectDepth,
metadataRecords []internal.Metadata) ([]TableConstraint, error) {
+ if depth == adbc.ObjectDepthCatalogs || depth ==
adbc.ObjectDepthDBSchemas {
+ return nil, nil
+ }
+ availableConstraintTypes := getAvailableConstraintTypes(metadataRecords)
+ availableFullyQualifiedConstraints :=
getAvailableFullyQualifiedConstraints(metadataRecords)
+
+ var uniqueConstraintsData []TableConstraint
+ var primaryKeyConstraintsData []TableConstraint
+ var foreignKeyConstraintsData []TableConstraint
+ var err error
+
+ if availableConstraintTypes != nil {
+ if _, exists := availableConstraintTypes[internal.Unique];
exists {
+ uniqueConstraintsData, err =
c.getUniqueConstraints(ctx, availableFullyQualifiedConstraints)
+ if err != nil {
+ return nil, errToAdbcErr(adbc.StatusIO, err)
+ }
+ }
+
+ if _, exists := availableConstraintTypes[internal.PrimaryKey];
exists {
+ primaryKeyConstraintsData, err =
c.getPrimaryKeyConstraints(ctx, availableFullyQualifiedConstraints)
+ if err != nil {
+ return nil, errToAdbcErr(adbc.StatusIO, err)
+ }
+ }
+
+ if _, exists := availableConstraintTypes[internal.ForeignKey];
exists {
+ foreignKeyConstraintsData, err =
c.getForeignKeyConstraints(ctx, availableFullyQualifiedConstraints)
+ if err != nil {
+ return nil, errToAdbcErr(adbc.StatusIO, err)
+ }
+ }
+ }
+
+ tableConstraintsData := append(append(uniqueConstraintsData,
primaryKeyConstraintsData...), foreignKeyConstraintsData...)
+
+ sort.Slice(tableConstraintsData, func(i, j int) bool {
+ if tableConstraintsData[i].constraintName ==
tableConstraintsData[j].constraintName {
+ return tableConstraintsData[i].keySequence <
tableConstraintsData[j].keySequence
+ }
+ return tableConstraintsData[i].constraintName ==
tableConstraintsData[j].constraintName
+ })
Review Comment:
`slices.SortFunc` is likely faster and easier to use
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