110 lines
2.4 KiB
Go
110 lines
2.4 KiB
Go
package postgres
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import (
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"errors"
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"github.com/go-jet/jet/internal/jet"
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"strconv"
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"strings"
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)
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var Dialect = NewDialect()
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func NewDialect() jet.Dialect {
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serializeOverrides := map[string]jet.SerializeOverride{}
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serializeOverrides["REGEXP_LIKE"] = postgres_REGEXP_LIKE_function
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dialectParams := jet.DialectParams{
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Name: "PostgreSQL",
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PackageName: "postgres",
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CastOverride: castFunc,
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SerializeOverrides: serializeOverrides,
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AliasQuoteChar: '"',
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IdentifierQuoteChar: '"',
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ArgumentPlaceholder: func(ord int) string {
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return "$" + strconv.Itoa(ord)
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},
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SetClause: postgresSetClause,
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SupportsReturning: true,
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}
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return jet.NewDialect(dialectParams)
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}
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func castFunc(expression jet.Expression, castType string) jet.SerializeFunc {
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return func(statement jet.StatementType, out *jet.SqlBuilder, options ...jet.SerializeOption) error {
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if err := jet.Serialize(expression, statement, out, options...); err != nil {
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return err
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}
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out.WriteString("::" + castType)
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return nil
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}
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}
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func postgresSetClause(columns []jet.IColumn, values []jet.Clause, out *jet.SqlBuilder) (err error) {
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if len(columns) > 1 {
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out.WriteString("(")
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}
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err = jet.SerializeColumnNames(columns, out)
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if err != nil {
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return
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}
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if len(columns) > 1 {
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out.WriteString(")")
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}
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out.WriteString("=")
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if len(values) > 1 {
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out.WriteString("(")
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}
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err = jet.SerializeClauseList(jet.UpdateStatementType, values, out)
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if err != nil {
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return
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}
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if len(values) > 1 {
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out.WriteString(")")
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}
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return
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}
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func postgres_REGEXP_LIKE_function(expressions ...jet.Expression) jet.SerializeFunc {
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return func(statement jet.StatementType, out *jet.SqlBuilder, options ...jet.SerializeOption) error {
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if len(expressions) < 2 {
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return errors.New("jet: invalid number of expressions for operator")
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}
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if err := jet.Serialize(expressions[0], statement, out, options...); err != nil {
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return err
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}
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caseSensitive := false
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if len(expressions) >= 3 {
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if stringLiteral, ok := expressions[2].(jet.LiteralExpression); ok {
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matchType := stringLiteral.Value().(string)
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caseSensitive = !strings.Contains(matchType, "i")
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}
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}
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if caseSensitive {
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out.WriteString("~")
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} else {
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out.WriteString("~*")
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}
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if err := jet.Serialize(expressions[1], statement, out, options...); err != nil {
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return err
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}
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return nil
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}
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}
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