Pretty print only CREATE TABLE

ast/sql.go

@@ -7,6 +7,14 @@ import (
 	"github.com/cloudspannerecosystem/memefish/token"
 )
 
+// indentLevel is the whitespace indentation level.
+// Currently, memefish does not perform pretty printing in general, it is only used by CreateTable.
+const indentLevel = 4
+
+// indent is a whitespace indentation of indentLevel width.
+// You should use this rather than using indentLevel directly.
+var indent = strings.Repeat(" ", indentLevel)
+
 // ================================================================================
 //
 // Helper functions for SQL()
@@ -748,11 +756,11 @@ func (d *DropProtoBundle) SQL() string { return "DROP PROTO BUNDLE" }
 func (c *CreateTable) SQL() string {
 	return "CREATE TABLE " +
 		strOpt(c.IfNotExists, "IF NOT EXISTS ") +
-		c.Name.SQL() + " (" +
-		sqlJoin(c.Columns, ", ") + strOpt(len(c.Columns) > 0 && (len(c.TableConstraints) > 0 || len(c.Synonyms) > 0), ", ") +
-		sqlJoin(c.TableConstraints, ", ") + strOpt(len(c.TableConstraints) > 0 && len(c.Synonyms) > 0, ", ") +
-		sqlJoin(c.Synonyms, ", ") +
-		") PRIMARY KEY (" + sqlJoin(c.PrimaryKeys, ", ") + ")" +
+		c.Name.SQL() + " (\n" +
+		indent + sqlJoin(c.Columns, ",\n"+indent) + strOpt(len(c.Columns) > 0 && (len(c.TableConstraints) > 0 || len(c.Synonyms) > 0), ",\n") +
+		strOpt(len(c.TableConstraints) > 0, indent) + sqlJoin(c.TableConstraints, ",\n"+indent) + strOpt(len(c.TableConstraints) > 0 && len(c.Synonyms) > 0, ",\n") +
+		strOpt(len(c.Synonyms) > 0, indent) + sqlJoin(c.Synonyms, ",\n") +
+		"\n) PRIMARY KEY (" + sqlJoin(c.PrimaryKeys, ", ") + ")" +
 		sqlOpt("", c.Cluster, "") +
 		sqlOpt("", c.RowDeletionPolicy, "")
 }
@@ -812,12 +820,12 @@ func (i *IndexKey) SQL() string {
 }
 
 func (c *Cluster) SQL() string {
-	return ", INTERLEAVE IN PARENT " + c.TableName.SQL() +
+	return ",\nINTERLEAVE IN PARENT " + c.TableName.SQL() +
 		strOpt(c.OnDelete != "", " "+string(c.OnDelete))
 }
 
 func (c *CreateRowDeletionPolicy) SQL() string {
-	return ", " + c.RowDeletionPolicy.SQL()
+	return ",\n" + c.RowDeletionPolicy.SQL()
 }
 
 func (r *RowDeletionPolicy) SQL() string {

parse_helpers_test.go

@@ -2,7 +2,9 @@ package memefish_test
 
 import (
 	"fmt"
+
 	"github.com/MakeNowJust/heredoc/v2"
+
 	"github.com/cloudspannerecosystem/memefish"
 )
 
@@ -84,7 +86,10 @@ func ExampleParseDDL() {
 	fmt.Println(ddl.SQL())
 
 	// Output:
-	// CREATE TABLE foo (x INT64, y INT64) PRIMARY KEY (x)
+	// CREATE TABLE foo (
+	//     x INT64,
+	//     y INT64
+	// ) PRIMARY KEY (x)
 }
 
 func ExampleParseDDLs() {
@@ -108,8 +113,15 @@ func ExampleParseDDLs() {
 	}
 
 	// Output:
-	// CREATE TABLE foo (x INT64, y INT64) PRIMARY KEY (x);
-	// CREATE TABLE bar (x INT64, z INT64) PRIMARY KEY (x, z), INTERLEAVE IN PARENT foo;
+	// CREATE TABLE foo (
+	//     x INT64,
+	//     y INT64
+	// ) PRIMARY KEY (x);
+	// CREATE TABLE bar (
+	//     x INT64,
+	//     z INT64
+	// ) PRIMARY KEY (x, z),
+	// INTERLEAVE IN PARENT foo;
 }
 
 func ExampleParseDML() {

testdata/input/ddl/create_table_for_format_test.sql

@@ -0,0 +1,13 @@
+create table if not exists foo (
+    foo int64,
+    bar float64 not null,
+    baz string(255) not null options(allow_commit_timestamp = null),
+    qux string(255) not null as (concat(baz, "a")) stored,
+    foreign key (foo) references t2 (t2key1),
+    constraint fkname foreign key (foo, bar) references t2 (t2key1, t2key2),
+    check (foo > 0),
+    constraint cname check (bar > 0),
+    corge timestamp not null default (current_timestamp())
+) primary key (foo),
+  interleave in parent foobar,
+  row deletion policy ( older_than ( baz, INTERVAL 30 DAY ) )

testdata/result/ddl/create_table.sql.txt

@@ -392,4 +392,17 @@ create table foo (
 }
 
 --- SQL
-CREATE TABLE foo (foo INT64, bar FLOAT64 NOT NULL, baz STRING(255) NOT NULL OPTIONS (allow_commit_timestamp = null), qux STRING(255) NOT NULL AS (concat(baz, "a")) STORED, quux JSON, corge TIMESTAMP NOT NULL DEFAULT (current_timestamp()), FOREIGN KEY (foo) REFERENCES t2 (t2key1), FOREIGN KEY (bar) REFERENCES t2 (t2key2) ON DELETE CASCADE, FOREIGN KEY (baz) REFERENCES t2 (t2key3) ON DELETE NO ACTION, CONSTRAINT fkname FOREIGN KEY (foo, bar) REFERENCES t2 (t2key1, t2key2), CHECK (foo > 0), CONSTRAINT cname CHECK (bar > 0)) PRIMARY KEY (foo, bar)
+CREATE TABLE foo (
+    foo INT64,
+    bar FLOAT64 NOT NULL,
+    baz STRING(255) NOT NULL OPTIONS (allow_commit_timestamp = null),
+    qux STRING(255) NOT NULL AS (concat(baz, "a")) STORED,
+    quux JSON,
+    corge TIMESTAMP NOT NULL DEFAULT (current_timestamp()),
+    FOREIGN KEY (foo) REFERENCES t2 (t2key1),
+    FOREIGN KEY (bar) REFERENCES t2 (t2key2) ON DELETE CASCADE,
+    FOREIGN KEY (baz) REFERENCES t2 (t2key3) ON DELETE NO ACTION,
+    CONSTRAINT fkname FOREIGN KEY (foo, bar) REFERENCES t2 (t2key1, t2key2),
+    CHECK (foo > 0),
+    CONSTRAINT cname CHECK (bar > 0)
+) PRIMARY KEY (foo, bar)

testdata/result/ddl/create_table_cluster.sql.txt

@@ -61,4 +61,8 @@ create table foo (
 }
 
 --- SQL
-CREATE TABLE foo (foo INT64, bar INT64) PRIMARY KEY (), INTERLEAVE IN PARENT foobar
+CREATE TABLE foo (
+    foo INT64,
+    bar INT64
+) PRIMARY KEY (),
+INTERLEAVE IN PARENT foobar

testdata/result/ddl/create_table_cluster_and_row_deletion_policy.sql.txt

@@ -94,4 +94,10 @@ create table foo (
 }
 
 --- SQL
-CREATE TABLE foo (foo INT64, bar INT64, baz TIMESTAMP) PRIMARY KEY (), INTERLEAVE IN PARENT foobar, ROW DELETION POLICY ( OLDER_THAN ( baz, INTERVAL 30 DAY ))
+CREATE TABLE foo (
+    foo INT64,
+    bar INT64,
+    baz TIMESTAMP
+) PRIMARY KEY (),
+INTERLEAVE IN PARENT foobar,
+ROW DELETION POLICY ( OLDER_THAN ( baz, INTERVAL 30 DAY ))

testdata/result/ddl/create_table_cluster_on_delete_no_action.sql.txt

@@ -58,4 +58,7 @@ create table foo (
 }
 
 --- SQL
-CREATE TABLE foo (foo INT64) PRIMARY KEY (foo), INTERLEAVE IN PARENT foobar ON DELETE NO ACTION
+CREATE TABLE foo (
+    foo INT64
+) PRIMARY KEY (foo),
+INTERLEAVE IN PARENT foobar ON DELETE NO ACTION

testdata/result/ddl/create_table_cluster_set_on_delete.sql.txt

@@ -58,4 +58,7 @@ create table foo (
 }
 
 --- SQL
-CREATE TABLE foo (foo INT64) PRIMARY KEY (foo), INTERLEAVE IN PARENT foobar ON DELETE CASCADE
+CREATE TABLE foo (
+    foo INT64
+) PRIMARY KEY (foo),
+INTERLEAVE IN PARENT foobar ON DELETE CASCADE