extended by the user in many ways, for example by adding new • data types • functions 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html i Preface • operators • aggregate functions • index with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html ii Preface 2.2. Postgres95 In 1994, Andrew Yu and Jolly Chen added a SQL language interpreter [chars] a bracket expression, matching any one of the chars (see Section 9.7.3.2 for more detail) \k (where k is a non-alphanumeric character) matches that character taken as an ordinary character, e.g. \\

adding new • data types • functions • operators • aggregate functions • index methods 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html i Preface • procedural languages And because of Berkeley code. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html ii Preface Postgres95 code was completely ANSI C and trimmed in size by 25%. Many internal [chars] a bracket expression, matching any one of the chars (see Section 9.7.3.2 for more detail) \k (where k is a non-alphanumeric character) matches that character taken as an ordinary character, e.g. \\

PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xxxviii Preface • functions • operators • aggregate should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xxxix Preface devoted to database research. In an effort to reduce this support burden [chars] a bracket expression, matching any one of the chars (see Section 9.7.3.2 for more detail) \k (where k is a non-alphanumeric character) matches that character taken as an ordinary character, e.g. \\

PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xxxv Preface • functions • operators • aggregate should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xxxvi Preface devoted to database research. In an effort to reduce this support burden (see Section 9.7.3.2 for more detail) 148 Chapter 9. Functions and Operators Atom Description \k (where k is a non-alphanumeric character) matches that character taken as an ordinary character, e.g. \\

.............................1994 F.20.3.7.7. s2k-mode..............................................................................1994 F.20.3.7.8. s2k-digest-algo.................................... .................................1994 F.20.3.7.9. s2k-cipher-algo ....................................................................1994 F.20.3.7.10. unicode-mode.................................... PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xlviii Preface • functions • operators • aggregate

7. s2k-mode.......................................................................1876 F.20.3.7.8. s2k-digest-algo..............................................................1877 F.20.3.7.9. s2k-cipher-algo adding new • data types • functions • operators • aggregate functions • index methods 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xliv Preface • procedural languages And because with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xlv Preface 2.2. Postgres95 In 1994, Andrew Yu and Jolly Chen added a SQL language interpreter

PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xlii Preface • functions • operators • aggregate should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xliii Preface devoted to database research. In an effort to reduce this support burden [chars] a bracket expression, matching any one of the chars (see Section 9.7.3.2 for more detail) \k (where k is a non-alphanumeric character) matches that character taken as an ordinary character, e.g. \\

PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xliv Preface • functions • operators • aggregate should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xlv Preface devoted to database research. In an effort to reduce this support burden [chars] a bracket expression, matching any one of the chars (see Section 9.7.3.2 for more detail) \k (where k is a non-alphanumeric character) matches that character taken as an ordinary character, e.g. \\

7. s2k-mode.......................................................................2078 F.23.3.7.8. s2k-digest-algo..............................................................2078 F.23.3.7.9. s2k-cipher-algo adding new • data types • functions • operators • aggregate functions • index methods 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xlviii Preface • procedural languages And because with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xlix Preface 2.2. Postgres95 In 1994, Andrew Yu and Jolly Chen added an SQL language

.............................2214 F.23.3.7.7. s2k-mode..............................................................................2214 F.23.3.7.8. s2k-digest-algo.................................... .................................2214 F.23.3.7.9. s2k-cipher-algo ....................................................................2215 F.23.3.7.10. unicode-mode.................................... PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html lii Preface • functions • operators • aggregate