diff --git a/internal/cmd/shim.go b/internal/cmd/shim.go index 654500429a..b5b6c14d54 100644 --- a/internal/cmd/shim.go +++ b/internal/cmd/shim.go @@ -161,6 +161,7 @@ func pluginQueries(r *compiler.Result) []*plugin.Query { Params: params, Filename: q.Metadata.Filename, InsertIntoTable: iit, + SourceTables: q.SourceTables, }) } return out diff --git a/internal/compiler/parse.go b/internal/compiler/parse.go index 2f9afb72c1..4effce0f33 100644 --- a/internal/compiler/parse.go +++ b/internal/compiler/parse.go @@ -181,6 +181,7 @@ func (c *Compiler) parseQuery(stmt ast.Node, src string, o opts.Parser) (*Query, Columns: anlys.Columns, SQL: trimmed, InsertIntoTable: anlys.Table, + SourceTables: sourceTableNames(raw.Stmt), }, nil } diff --git a/internal/compiler/query.go b/internal/compiler/query.go index b3cf9d6154..5683a30602 100644 --- a/internal/compiler/query.go +++ b/internal/compiler/query.go @@ -48,6 +48,12 @@ type Query struct { Columns []*Column Params []Parameter + // SourceTables lists the names of the base tables the query reads from, + // including tables that appear only in joins, subqueries, or common table + // expression bodies. Common table expression names and the target relations + // of write statements are excluded. + SourceTables []string + // Needed for CopyFrom InsertIntoTable *ast.TableName diff --git a/internal/compiler/source_tables.go b/internal/compiler/source_tables.go new file mode 100644 index 0000000000..978f2dc054 --- /dev/null +++ b/internal/compiler/source_tables.go @@ -0,0 +1,72 @@ +package compiler + +import ( + "sort" + + "github.com/sqlc-dev/sqlc/internal/sql/ast" + "github.com/sqlc-dev/sqlc/internal/sql/astutils" +) + +// sourceTableNames returns the sorted, deduplicated names of the base tables a +// statement reads from. It covers every table referenced in a FROM, a JOIN, or +// a subquery in any clause, including the bodies of common table expressions. +// The names of common table expressions and the target relations of INSERT, +// UPDATE, DELETE, and TRUNCATE statements are not reads and are excluded. +func sourceTableNames(root ast.Node) []string { + cteNames := map[string]struct{}{} + writeTargets := map[*ast.RangeVar]struct{}{} + + collect := astutils.VisitorFunc(func(node ast.Node) { + switch n := node.(type) { + case *ast.CommonTableExpr: + if n.Ctename != nil { + cteNames[*n.Ctename] = struct{}{} + } + case *ast.InsertStmt: + if n.Relation != nil { + markRangeVars(writeTargets, n.Relation) + } + case *ast.UpdateStmt: + if n.Relations != nil { + markRangeVars(writeTargets, n.Relations) + } + case *ast.DeleteStmt: + if n.Relations != nil { + markRangeVars(writeTargets, n.Relations) + } + case *ast.TruncateStmt: + if n.Relations != nil { + markRangeVars(writeTargets, n.Relations) + } + } + }) + astutils.Walk(collect, root) + + seen := map[string]struct{}{} + var names []string + for _, rv := range rangeVars(root) { + if _, ok := writeTargets[rv]; ok { + continue + } + table, err := ParseTableName(rv) + if err != nil { + continue + } + if _, ok := cteNames[table.Name]; ok { + continue + } + if _, ok := seen[table.Name]; ok { + continue + } + seen[table.Name] = struct{}{} + names = append(names, table.Name) + } + sort.Strings(names) + return names +} + +func markRangeVars(set map[*ast.RangeVar]struct{}, node ast.Node) { + for _, rv := range rangeVars(node) { + set[rv] = struct{}{} + } +} diff --git a/internal/compiler/source_tables_test.go b/internal/compiler/source_tables_test.go new file mode 100644 index 0000000000..4e0036e2b4 --- /dev/null +++ b/internal/compiler/source_tables_test.go @@ -0,0 +1,60 @@ +package compiler + +import ( + "reflect" + "strings" + "testing" + + "github.com/sqlc-dev/sqlc/internal/engine/postgresql" +) + +func TestSourceTableNames(t *testing.T) { + for _, tc := range []struct { + name string + sql string + want []string + }{ + { + name: "cte, join and subquery dependencies", + sql: `WITH filtered_accounts AS ( + SELECT account_id FROM accounts WHERE accounts.space_id = $1 + AND NOT EXISTS ( + SELECT 1 FROM account_tags t WHERE t.account_id = accounts.account_id + ) + ) + SELECT acc.* FROM accounts acc + JOIN filtered_accounts fa ON acc.account_id = fa.account_id + LEFT JOIN transactions t ON t.debit_account_id = acc.account_id`, + want: []string{"account_tags", "accounts", "transactions"}, + }, + { + name: "deduplicated across aliases", + sql: `SELECT a1.account_id FROM accounts a1 JOIN accounts a2 ON a1.space_id = a2.space_id`, + want: []string{"accounts"}, + }, + { + name: "insert excludes write target, includes read", + sql: `INSERT INTO audit_log (account_id) SELECT account_id FROM accounts`, + want: []string{"accounts"}, + }, + { + name: "no base tables", + sql: `SELECT 1`, + want: nil, + }, + } { + t.Run(tc.name, func(t *testing.T) { + stmts, err := postgresql.NewParser().Parse(strings.NewReader(tc.sql + ";")) + if err != nil { + t.Fatalf("parse: %v", err) + } + if len(stmts) != 1 { + t.Fatalf("expected 1 statement, got %d", len(stmts)) + } + got := sourceTableNames(stmts[0].Raw.Stmt) + if !reflect.DeepEqual(got, tc.want) { + t.Errorf("sourceTableNames\n got: %v\n want: %v", got, tc.want) + } + }) + } +} diff --git a/internal/endtoend/testdata/codegen_json/gen/codegen.json b/internal/endtoend/testdata/codegen_json/gen/codegen.json index 4fb849e730..e51d94df17 100644 --- a/internal/endtoend/testdata/codegen_json/gen/codegen.json +++ b/internal/endtoend/testdata/codegen_json/gen/codegen.json @@ -65079,7 +65079,10 @@ ], "comments": [], "filename": "query.sql", - "insert_into_table": null + "insert_into_table": null, + "source_tables": [ + "authors" + ] }, { "text": "SELECT id, name, bio FROM authors\nORDER BY name", @@ -65168,7 +65171,10 @@ "params": [], "comments": [], "filename": "query.sql", - "insert_into_table": null + "insert_into_table": null, + "source_tables": [ + "authors" + ] }, { "text": "INSERT INTO authors (\n name, bio\n) VALUES (\n $1, $2\n)\nRETURNING id, name, bio", @@ -65320,7 +65326,8 @@ "catalog": "", "schema": "", "name": "authors" - } + }, + "source_tables": [] }, { "text": "DELETE FROM authors\nWHERE id = $1", @@ -65360,7 +65367,8 @@ ], "comments": [], "filename": "query.sql", - "insert_into_table": null + "insert_into_table": null, + "source_tables": [] } ], "sqlc_version": "v1.31.1", diff --git a/internal/endtoend/testdata/process_plugin_sqlc_gen_json/gen/codegen.json b/internal/endtoend/testdata/process_plugin_sqlc_gen_json/gen/codegen.json index ea90318619..ade4e1676d 100644 --- a/internal/endtoend/testdata/process_plugin_sqlc_gen_json/gen/codegen.json +++ b/internal/endtoend/testdata/process_plugin_sqlc_gen_json/gen/codegen.json @@ -65081,7 +65081,10 @@ ], "comments": [], "filename": "query.sql", - "insert_into_table": null + "insert_into_table": null, + "source_tables": [ + "authors" + ] }, { "text": "SELECT id, name, bio FROM authors\nORDER BY name", @@ -65170,7 +65173,10 @@ "params": [], "comments": [], "filename": "query.sql", - "insert_into_table": null + "insert_into_table": null, + "source_tables": [ + "authors" + ] }, { "text": "INSERT INTO authors (\n name, bio\n) VALUES (\n $1, $2\n)\nRETURNING id, name, bio", @@ -65322,7 +65328,8 @@ "catalog": "", "schema": "", "name": "authors" - } + }, + "source_tables": [] }, { "text": "DELETE FROM authors\nWHERE id = $1", @@ -65362,7 +65369,8 @@ ], "comments": [], "filename": "query.sql", - "insert_into_table": null + "insert_into_table": null, + "source_tables": [] } ], "sqlc_version": "v1.31.1", diff --git a/internal/plugin/codegen.pb.go b/internal/plugin/codegen.pb.go index 525ffc72ef..7ac48f6225 100644 --- a/internal/plugin/codegen.pb.go +++ b/internal/plugin/codegen.pb.go @@ -816,6 +816,7 @@ type Query struct { Comments []string `protobuf:"bytes,6,rep,name=comments,proto3" json:"comments,omitempty"` Filename string `protobuf:"bytes,7,opt,name=filename,proto3" json:"filename,omitempty"` InsertIntoTable *Identifier `protobuf:"bytes,8,opt,name=insert_into_table,proto3" json:"insert_into_table,omitempty"` + SourceTables []string `protobuf:"bytes,9,rep,name=source_tables,proto3" json:"source_tables,omitempty"` } func (x *Query) Reset() { @@ -906,6 +907,13 @@ func (x *Query) GetInsertIntoTable() *Identifier { return nil } +func (x *Query) GetSourceTables() []string { + if x != nil { + return x.SourceTables + } + return nil +} + type Parameter struct { state protoimpl.MessageState sizeCache protoimpl.SizeCache @@ -1308,7 +1316,7 @@ var file_plugin_codegen_proto_rawDesc = []byte{ 0x61, 0x6d, 0x65, 0x12, 0x1a, 0x0a, 0x08, 0x75, 0x6e, 0x73, 0x69, 0x67, 0x6e, 0x65, 0x64, 0x18, 0x10, 0x20, 0x01, 0x28, 0x08, 0x52, 0x08, 0x75, 0x6e, 0x73, 0x69, 0x67, 0x6e, 0x65, 0x64, 0x12, 0x1d, 0x0a, 0x0a, 0x61, 0x72, 0x72, 0x61, 0x79, 0x5f, 0x64, 0x69, 0x6d, 0x73, 0x18, 0x11, 0x20, - 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