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Nullable Timestamp Column Fix #7740

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merged 5 commits into from
Mar 30, 2021
Merged

Nullable Timestamp Column Fix #7740

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afb28a6
added a null field to the ast
GuptaManan100 Mar 25, 2021
e0675a1
added a test for multiple null and not null specified in the same col…
GuptaManan100 Mar 25, 2021
0fb8826
added a comment
GuptaManan100 Mar 25, 2021
2092902
Merge branch 'master' into nullable-timestamp
harshit-gangal Mar 26, 2021
70626f7
replaced 2 bools with a *bool
GuptaManan100 Mar 30, 2021
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8 changes: 8 additions & 0 deletions go/vt/sqlparser/ast.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1364,7 +1364,15 @@ type ColumnType struct {

// ColumnTypeOptions are generic field options for a column type
type ColumnTypeOptions struct {
/* We need both Null and NotNull to distinguish 3 cases -
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1. When Not Null is specified (NotNull = true, Null = false)
2. When Null is specified (NotNull = false, Null = true)
3. When nothing is specified (NotNull = false, Null = false)
The complexity arises from the fact that we do not know whether the column will be nullable or not if nothing is specified.
Therefore we do not know whether the column is nullable or not in case 3.
*/
NotNull bool
Null bool
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Autoincrement bool
Default Expr
OnUpdate Expr
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1 change: 1 addition & 0 deletions go/vt/sqlparser/ast_equals.go
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3 changes: 3 additions & 0 deletions go/vt/sqlparser/ast_format.go
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Expand Up @@ -456,6 +456,9 @@ func (ct *ColumnType) Format(buf *TrackedBuffer) {
if ct.Collate != "" {
buf.astPrintf(ct, " %s %s", keywordStrings[COLLATE], ct.Collate)
}
if ct.Options.Null {
buf.astPrintf(ct, " %s", keywordStrings[NULL])
}
if ct.Options.NotNull {
buf.astPrintf(ct, " %s %s", keywordStrings[NOT], keywordStrings[NULL])
}
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4 changes: 4 additions & 0 deletions go/vt/sqlparser/ast_format_fast.go
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11 changes: 11 additions & 0 deletions go/vt/sqlparser/parse_test.go
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Expand Up @@ -1156,6 +1156,9 @@ var (
}, {
input: "CREATE TABLE aipk (id INT AUTO_INCREMENT PRIMARY KEY)",
output: "create table aipk (\n\tid INT auto_increment primary key\n)",
}, {
input: "create table foo (f timestamp null not null , g timestamp not null null)",
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output: "create table foo (\n\tf timestamp not null,\n\tg timestamp null\n)",
}, {
input: "alter vschema create vindex hash_vdx using hash",
}, {
Expand Down Expand Up @@ -2569,6 +2572,14 @@ func TestCreateTable(t *testing.T) {
" col_multipolygon2 multipolygon not null\n" +
")",

// test null columns
"create table foo (\n" +
" id int primary key,\n" +
" a varchar(255) null,\n" +
" b varchar(255) null default 'foo',\n" +
" c timestamp null default current_timestamp()\n" +
")",

// test defining indexes separately
"create table t (\n" +
" id int auto_increment,\n" +
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